/**
 * $Id$
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <math.h>
#include <string.h>

#ifndef WIN32
#include <unistd.h>
#else
#include <io.h>
#endif
#include <stdlib.h>
#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_arithb.h"
#include "BLI_dynstr.h"
#include "BLI_rand.h"

#include "DNA_curve_types.h"
#include "DNA_key_types.h"
#include "DNA_mesh_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_view3d_types.h"
#include "DNA_userdef_types.h"

#include "BKE_context.h"
#include "BKE_curve.h"
#include "BKE_depsgraph.h"
#include "BKE_fcurve.h"
#include "BKE_global.h"
#include "BKE_key.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_object.h"
#include "BKE_report.h"
#include "BKE_utildefines.h"

#include "WM_api.h"
#include "WM_types.h"

#include "ED_anim_api.h"
#include "ED_curve.h"
#include "ED_keyframes_edit.h"
#include "ED_object.h"
#include "ED_screen.h"
#include "ED_transform.h"
#include "ED_types.h"
#include "ED_util.h"
#include "ED_view3d.h"

#include "UI_interface.h"

#include "RNA_access.h"
#include "RNA_define.h"

/* still need to eradicate a few :( */
#define callocstructN(x,y,name) (x*)MEM_callocN((y)* sizeof(x),name)

/* for curve objects in editmode that can have hidden handles  */
#define BEZSELECTED_HIDDENHANDLES(bezt)   ((G.f & G_HIDDENHANDLES) ? (bezt)->f2 & SELECT : BEZSELECTED(bezt))

float nurbcircle[8][2]= {
	{0.0, -1.0}, {-1.0, -1.0}, {-1.0, 0.0}, {-1.0,  1.0},
	{0.0,  1.0}, { 1.0,  1.0}, { 1.0, 0.0}, { 1.0, -1.0}
};

ListBase *curve_get_editcurve(Object *ob)
{
	if(ob && ELEM(ob->type, OB_CURVE, OB_SURF)) {
		Curve *cu= ob->data;
		return cu->editnurb;
	}
	return NULL;
}

/* this replaces the active flag used in uv/face mode */
void set_actNurb(Object *obedit, Nurb *nu)
{
	Curve *cu= obedit->data;
	
	if(nu==NULL)
		cu->actnu = -1;
	else
		cu->actnu = BLI_findindex(cu->editnurb, nu);
}

Nurb *get_actNurb(Object *obedit)
{
	Curve *cu= obedit->data;
	
	return BLI_findlink(cu->editnurb, cu->actnu);
}

/* ******************* SELECTION FUNCTIONS ********************* */

#define HIDDEN			1
#define VISIBLE			0

#define FIRST			1
#define LAST			0


/* returns 1 in case (de)selection was successful */
static short select_beztriple(BezTriple *bezt, short selstatus, short flag, short hidden)
{	
	if(bezt) {
		if((bezt->hide==0) || (hidden==1)) {
			if(selstatus==1) { /* selects */			
				bezt->f1 |= flag;
				bezt->f2 |= flag;
				bezt->f3 |= flag;
				return 1;			
			}
			else { /* deselects */	
				bezt->f1 &= ~flag; 
				bezt->f2 &= ~flag; 
				bezt->f3 &= ~flag; 
				return 1;
			}
		}
	}
	
	return 0;
}

/* returns 1 in case (de)selection was successful */
static short select_bpoint(BPoint *bp, short selstatus, short flag, short hidden) 
{	
	if(bp) {
		if((bp->hide==0) || (hidden==1)) {
			if(selstatus==1) {
				bp->f1 |= flag;
				return 1;
			}
			else {
				bp->f1 &= ~flag;
				return 1;
			}
		}
	}

	return 0;
}

static short swap_selection_beztriple(BezTriple *bezt)
{
	if(bezt->f2 & SELECT)
		return select_beztriple(bezt, DESELECT, 1, VISIBLE);
	else
		return select_beztriple(bezt, SELECT, 1, VISIBLE);
}

static short swap_selection_bpoint(BPoint *bp)
{
	if(bp->f1 & SELECT)
		return select_bpoint(bp, DESELECT, 1, VISIBLE);
	else
		return select_bpoint(bp, SELECT, 1, VISIBLE);
}

int isNurbsel(Nurb *nu)
{
	BezTriple *bezt;
	BPoint *bp;
	int a;

	if((nu->type & 7)==CU_BEZIER) {
		bezt= nu->bezt;
		a= nu->pntsu;
		while(a--) {
			if( (bezt->f1 & SELECT) || (bezt->f2 & SELECT) || (bezt->f3 & SELECT) ) return 1;
			bezt++;
		}
	}
	else {
		bp= nu->bp;
		a= nu->pntsu*nu->pntsv;
		while(a--) {
			if( (bp->f1 & SELECT) ) return 1;
			bp++;
		}
	}
	return 0;
}

int isNurbsel_count(Nurb *nu)
{
	BezTriple *bezt;
	BPoint *bp;
	int a, sel=0;

	if((nu->type & 7)==CU_BEZIER) {
		bezt= nu->bezt;
		a= nu->pntsu;
		while(a--) {
			if (BEZSELECTED_HIDDENHANDLES(bezt)) sel++;
			bezt++;
		}
	}
	else {
		bp= nu->bp;
		a= nu->pntsu*nu->pntsv;
		while(a--) {
			if( (bp->f1 & SELECT) ) sel++;
			bp++;
		}
	}
	return sel;
}

/* ******************* PRINTS ********************* */

void printknots(Object *obedit)
{
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	int a, num;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if(isNurbsel(nu) &&  (nu->type & 7)==CU_NURBS) {
			if(nu->knotsu) {
				num= KNOTSU(nu);
				for(a=0;a<num;a++) printf("knotu %d: %f\n", a, nu->knotsu[a]);
			}
			if(nu->knotsv) {
				num= KNOTSV(nu);
				for(a=0;a<num;a++) printf("knotv %d: %f\n", a, nu->knotsv[a]);
			}
		}
	}
}

/* ********************* LOAD and MAKE *************** */

/* load editNurb in object */
void load_editNurb(Object *obedit)
{
	ListBase *editnurb= curve_get_editcurve(obedit);

	if(obedit==NULL) return;

	if (ELEM(obedit->type, OB_CURVE, OB_SURF)) {
		Curve *cu= obedit->data;
		Nurb *nu, *newnu;
		KeyBlock *actkey;
		int totvert= count_curveverts(editnurb);

		/* are there keys? */
		actkey = ob_get_keyblock(obedit);
		if(actkey) {
			/* active key: the vertices */
			
			if(totvert) {
				if(actkey->data) MEM_freeN(actkey->data);
			
				actkey->data= MEM_callocN(cu->key->elemsize*totvert, "actkey->data");
				actkey->totelem= totvert;
		
				curve_to_key(cu, actkey, editnurb);
			}
		}
		
		if(cu->key && actkey!=cu->key->refkey) {
			;
		}
		else {
			freeNurblist(&(cu->nurb));
			
			for(nu= editnurb->first; nu; nu= nu->next) {
				newnu= duplicateNurb(nu);
				BLI_addtail(&(cu->nurb), newnu);
				
				if((nu->type & 7)==CU_NURBS) {
					clamp_nurb_order_u(nu);
				}
			}
		}
	}
	
	set_actNurb(obedit, NULL);
}

/* make copy in cu->editnurb */
void make_editNurb(Object *obedit)
{
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu, *newnu;
	KeyBlock *actkey;

	if(obedit==NULL) return;

	if (ELEM(obedit->type, OB_CURVE, OB_SURF)) {
		Curve *cu= obedit->data;
		
		if(editnurb)
			freeNurblist(editnurb);
		else
			editnurb= cu->editnurb= MEM_callocN(sizeof(ListBase), "editnurb");
		
		nu= cu->nurb.first;
		cu->lastselbp= NULL;   /* for select row */
		
		while(nu) {
			newnu= duplicateNurb(nu);
			test2DNurb(newnu);	// after join, or any other creation of curve
			BLI_addtail(editnurb, newnu);
			nu= nu->next;
		}
		
		actkey = ob_get_keyblock(obedit);
		if(actkey) {
			// XXX strcpy(G.editModeTitleExtra, "(Key) ");
			key_to_curve(actkey, cu, editnurb);
		}
	}
	
	set_actNurb(obedit, NULL);
}

void free_editNurb(Object *obedit)
{
	Curve *cu= obedit->data;

	if(cu->editnurb) {
		freeNurblist(cu->editnurb);
		MEM_freeN(cu->editnurb);
		cu->editnurb= NULL;
	}
}

/******************** separate operator ***********************/

static int separate_exec(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	Nurb *nu, *nu1;
	Object *oldob, *newob;
	Base *oldbase, *newbase;
	Curve *oldcu, *newcu;
	ListBase *oldedit, *newedit;

	oldbase= CTX_data_active_base(C);
	oldob= oldbase->object;
	oldcu= oldob->data;
	oldedit= oldcu->editnurb;

	if(oldcu->key) {
		BKE_report(op->reports, RPT_ERROR, "Can't separate a curve with vertex keys.");
		return OPERATOR_CANCELLED;
	}

	WM_cursor_wait(1);
	
	/* 1. duplicate the object and data */
	newbase= ED_object_add_duplicate(scene, oldbase, 0);	/* 0 = fully linked */
	ED_base_object_select(newbase, BA_DESELECT);
	newob= newbase->object;

	newcu= newob->data= copy_curve(oldcu);
	newcu->editnurb= NULL;
	oldcu->id.us--; /* because new curve is a copy: reduce user count */

	/* 2. put new object in editmode and clear it */
	make_editNurb(newob);
	newedit= newcu->editnurb;
	freeNurblist(newedit);

	/* 3. move over parts from old object */
	for(nu= oldedit->first; nu; nu=nu1) {
		nu1= nu->next;

		if(isNurbsel(nu)) {
			BLI_remlink(oldedit, nu);
			BLI_addtail(newedit, nu);
		}
	}

	/* 4. put old object out of editmode */
	load_editNurb(newob);
	free_editNurb(newob);

	DAG_object_flush_update(scene, oldob, OB_RECALC_DATA);	/* this is the original one */
	DAG_object_flush_update(scene, newob, OB_RECALC_DATA);	/* this is the separated one */

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, oldob);

	WM_cursor_wait(0);

	return OPERATOR_FINISHED;
}

void CURVE_OT_separate(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Separate";
	ot->idname= "CURVE_OT_separate";
	
	/* api callbacks */
	ot->exec= separate_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/* ******************* FLAGS ********************* */

static short isNurbselUV(Nurb *nu, int *u, int *v, int flag)
{
	/* return u!=-1:     1 row in u-direction selected. U has value between 0-pntsv 
     * return v!=-1: 1 collumn in v-direction selected. V has value between 0-pntsu 
     */
	BPoint *bp;
	int a, b, sel;

	*u= *v= -1;

	bp= nu->bp;
	for(b=0; b<nu->pntsv; b++) {
		sel= 0;
		for(a=0; a<nu->pntsu; a++, bp++) {
			if(bp->f1 & flag) sel++;
		}
		if(sel==nu->pntsu) {
			if(*u== -1) *u= b;
			else return 0;
		}
		else if(sel>1) return 0;    /* because sel==1 is still ok */
	}

	for(a=0; a<nu->pntsu; a++) {
		sel= 0;
		bp= nu->bp+a;
		for(b=0; b<nu->pntsv; b++, bp+=nu->pntsu) {
			if(bp->f1 & flag) sel++;
		}
		if(sel==nu->pntsv) {
			if(*v== -1) *v= a;
			else return 0;
		}
		else if(sel>1) return 0;
	}

	if(*u==-1 && *v>-1) return 1;
	if(*v==-1 && *u>-1) return 1;
	return 0;
}

static void setflagsNurb(ListBase *editnurb, short flag)
{
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if( (nu->type & 7)==CU_BEZIER) {
			a= nu->pntsu;
			bezt= nu->bezt;
			while(a--) {
				bezt->f1= bezt->f2= bezt->f3= flag;
				bezt++;
			}
		}
		else {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a--) {
				bp->f1= flag;
				bp++;
			}
		}
	}
}

static void rotateflagNurb(ListBase *editnurb, short flag, float *cent, float rotmat[][3])
{
	/* all verts with (flag & 'flag') rotate */
	Nurb *nu;
	BPoint *bp;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if((nu->type & 7)==CU_NURBS) {
			bp= nu->bp;
			a= nu->pntsu*nu->pntsv;

			while(a--) {
				if(bp->f1 & flag) {
					bp->vec[0]-=cent[0];
					bp->vec[1]-=cent[1];
					bp->vec[2]-=cent[2];
					Mat3MulVecfl(rotmat, bp->vec);
					bp->vec[0]+=cent[0];
					bp->vec[1]+=cent[1];
					bp->vec[2]+=cent[2];
				}
				bp++;
			}
		}
	}
}

static void translateflagNurb(ListBase *editnurb, short flag, float *vec)
{
	/* all verts with ('flag' & flag) translate */
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if( (nu->type & 7)==CU_BEZIER) {
			a= nu->pntsu;
			bezt= nu->bezt;
			while(a--) {
				if(bezt->f1 & flag) VecAddf(bezt->vec[0], bezt->vec[0], vec);
				if(bezt->f2 & flag) VecAddf(bezt->vec[1], bezt->vec[1], vec);
				if(bezt->f3 & flag) VecAddf(bezt->vec[2], bezt->vec[2], vec);
				bezt++;
			}
		}
		else {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a--) {
				if(bp->f1 & flag) VecAddf(bp->vec, bp->vec, vec);
				bp++;
			}
		}

		test2DNurb(nu);
	}
}

static void weightflagNurb(ListBase *editnurb, short flag, float w, int mode)	/* mode==0: replace, mode==1: multiply */
{
	Nurb *nu;
	BPoint *bp;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if((nu->type & 7)==CU_NURBS) {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a--) {
				if(bp->f1 & flag) {
					if(mode==1) bp->vec[3]*= w;
					else bp->vec[3]= w;
				}
				bp++;
			}
		}
	}
}

static int deleteflagNurb(bContext *C, wmOperator *op, int flag)
{
	Object *obedit= CTX_data_edit_object(C);
	Curve *cu= obedit->data;
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu, *next;
	BPoint *bp, *bpn, *newbp;
	int a, b, newu, newv, sel;

	if(obedit && obedit->type==OB_SURF);
	else return OPERATOR_CANCELLED;

	cu->lastselbp= NULL;

	nu= editnurb->first;
	while(nu) {
		next= nu->next;

		/* is entire nurb selected */
		bp= nu->bp;
		a= nu->pntsu*nu->pntsv;
		while(a) {
			a--;
			if(bp->f1 & flag);
			else break;
			bp++;
		}
		if(a==0) {
			BLI_remlink(editnurb, nu);
			freeNurb(nu); nu=NULL;
		}
		else {
			/* is nurb in U direction selected */
			newv= nu->pntsv;
			bp= nu->bp;
			for(b=0; b<nu->pntsv; b++) {
				sel= 0;
				for(a=0; a<nu->pntsu; a++, bp++) {
					if(bp->f1 & flag) sel++;
				}
				if(sel==nu->pntsu) {
					newv--;
				}
				else if(sel>=1) {
					/* don't delete */
					break;
				}
			}
			if(newv!=nu->pntsv && b==nu->pntsv)	{
				/* delete */
				bp= nu->bp;
				bpn = newbp =
					(BPoint*) MEM_mallocN(newv * nu->pntsu * sizeof(BPoint), "deleteNurb");
				for(b=0; b<nu->pntsv; b++) {
					if((bp->f1 & flag)==0) {
						memcpy(bpn, bp, nu->pntsu*sizeof(BPoint));
						bpn+= nu->pntsu;
					}
					bp+= nu->pntsu;
				}
				nu->pntsv= newv;
				MEM_freeN(nu->bp);
				nu->bp= newbp;
				clamp_nurb_order_v(nu);

				makeknots(nu, 2);
			}
			else {
				/* is the nurb in V direction selected */
				newu= nu->pntsu;
				for(a=0; a<nu->pntsu; a++) {
					bp= nu->bp+a;
					sel= 0;
					for(b=0; b<nu->pntsv; b++, bp+=nu->pntsu) {
						if(bp->f1 & flag) sel++;
					}
					if(sel==nu->pntsv) {
						newu--;
					}
					else if(sel>=1) {
						/* don't delete */
						break;
					}
				}
				if(newu!=nu->pntsu && a==nu->pntsu)	{
					/* delete */
					bp= nu->bp;
					bpn = newbp =
						(BPoint*) MEM_mallocN(newu * nu->pntsv * sizeof(BPoint), "deleteNurb");
					for(b=0; b<nu->pntsv; b++) {
						for(a=0; a<nu->pntsu; a++, bp++) {
							if((bp->f1 & flag)==0) {
								*bpn= *bp;
								bpn++;
							}
						}
					}
					MEM_freeN(nu->bp);
					nu->bp= newbp;
					if(newu==1 && nu->pntsv>1) {    /* make a U spline */
						nu->pntsu= nu->pntsv;
						nu->pntsv= 1;
						SWAP(short, nu->orderu, nu->orderv);
						clamp_nurb_order_u(nu);
						if(nu->knotsv) MEM_freeN(nu->knotsv);
						nu->knotsv= NULL;
					}
					else {
						nu->pntsu= newu;
						clamp_nurb_order_u(nu);
					}
					makeknots(nu, 1);
				}
			}
		}
		nu= next;
	}

	return OPERATOR_FINISHED;
}

/* only for OB_SURF */
static short extrudeflagNurb(ListBase *editnurb, int flag)
{
	Nurb *nu;
	BPoint *bp, *bpn, *newbp;
	int ok= 0, a, u, v, len;

	nu= editnurb->first;
	while(nu) {

		if(nu->pntsv==1) {
			bp= nu->bp;
			a= nu->pntsu;
			while(a) {
				if(bp->f1 & flag);
				else break;
				bp++;
				a--;
			}
			if(a==0) {
				ok= 1;
				newbp =
					(BPoint*)MEM_mallocN(2 * nu->pntsu * sizeof(BPoint), "extrudeNurb1");
				memcpy(newbp, nu->bp, nu->pntsu*sizeof(BPoint) );
				bp= newbp+ nu->pntsu;
				memcpy(bp, nu->bp, nu->pntsu*sizeof(BPoint) );
				MEM_freeN(nu->bp);
				nu->bp= newbp;
				a= nu->pntsu;
				while(a--) {
					select_bpoint(bp, SELECT, flag, HIDDEN);
					select_bpoint(newbp, DESELECT, flag, HIDDEN);
					bp++; 
					newbp++;
				}

				nu->pntsv= 2;
				nu->orderv= 2;
				makeknots(nu, 2);
			}
		}
		else {
			/* which row or collumn is selected */

			if( isNurbselUV(nu, &u, &v, flag) ) {

				/* deselect all */
				bp= nu->bp;
				a= nu->pntsu*nu->pntsv;
				while(a--) {
					select_bpoint(bp, DESELECT, flag, HIDDEN);
					bp++;
				}

				if(u==0 || u== nu->pntsv-1) {	    /* row in u-direction selected */
					ok= 1;
					newbp =
						(BPoint*) MEM_mallocN(nu->pntsu*(nu->pntsv + 1)
										  * sizeof(BPoint), "extrudeNurb1");
					if(u==0) {
						len= nu->pntsv*nu->pntsu;
						memcpy(newbp+nu->pntsu, nu->bp, len*sizeof(BPoint) );
						memcpy(newbp, nu->bp, nu->pntsu*sizeof(BPoint) );
						bp= newbp;
					}
					else {
						len= nu->pntsv*nu->pntsu;
						memcpy(newbp, nu->bp, len*sizeof(BPoint) );
						memcpy(newbp+len, nu->bp+len-nu->pntsu, nu->pntsu*sizeof(BPoint) );
						bp= newbp+len;
					}

					a= nu->pntsu;
					while(a--) {
						select_bpoint(bp, SELECT, flag, HIDDEN);
						bp++;
					}

					MEM_freeN(nu->bp);
					nu->bp= newbp;
					nu->pntsv++;
					makeknots(nu, 2);
				}
				else if(v==0 || v== nu->pntsu-1) {	    /* collumn in v-direction selected */
					ok= 1;
					bpn = newbp =
						(BPoint*) MEM_mallocN((nu->pntsu + 1) * nu->pntsv * sizeof(BPoint), "extrudeNurb1");
					bp= nu->bp;

					for(a=0; a<nu->pntsv; a++) {
						if(v==0) {
							*bpn= *bp;
							bpn->f1 |= flag;
							bpn++;
						}
						memcpy(bpn, bp, nu->pntsu*sizeof(BPoint));
						bp+= nu->pntsu;
						bpn+= nu->pntsu;
						if(v== nu->pntsu-1) {
							*bpn= *(bp-1);
							bpn->f1 |= flag;
							bpn++;
						}
					}

					MEM_freeN(nu->bp);
					nu->bp= newbp;
					nu->pntsu++;
					makeknots(nu, 1);
				}
			}
		}
		nu= nu->next;
	}

	return ok;
}

static void adduplicateflagNurb(Object *obedit, short flag)
{
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu, *newnu;
	BezTriple *bezt, *bezt1;
	BPoint *bp, *bp1;
	int a, b, starta, enda, newu, newv;
	char *usel;

	nu= editnurb->last;
	while(nu) {
		if( (nu->type & 7)==CU_BEZIER) {
			bezt= nu->bezt;
			for(a=0; a<nu->pntsu; a++) {
				enda= -1;
				starta= a;
				while( (bezt->f1 & flag) || (bezt->f2 & flag) || (bezt->f3 & flag) ) {
					select_beztriple(bezt, DESELECT, flag, HIDDEN);
					enda=a;
					if(a>=nu->pntsu-1) break;
					a++;
					bezt++;
				}
				if(enda>=starta) {
					newnu = (Nurb*)MEM_mallocN(sizeof(Nurb), "adduplicateN");  
					memcpy(newnu, nu, sizeof(Nurb));
					BLI_addtail(editnurb, newnu);
					set_actNurb(obedit, newnu);
					newnu->pntsu= enda-starta+1;
					newnu->bezt=
						(BezTriple*)MEM_mallocN((enda - starta + 1) * sizeof(BezTriple), "adduplicateN");  
					memcpy(newnu->bezt, nu->bezt+starta, newnu->pntsu*sizeof(BezTriple));

					b= newnu->pntsu;
					bezt1= newnu->bezt;
					while(b--) {
						select_beztriple(bezt1, SELECT, flag, HIDDEN);
						bezt1++;
					}

					if(nu->flagu & CU_CYCLIC) {
						if(starta!=0 || enda!=nu->pntsu-1) {
							newnu->flagu &= ~CU_CYCLIC;
						}
					}
				}
				bezt++;
			}
		}
		else if(nu->pntsv==1) {	/* because UV Nurb has a different method for dupli */
			bp= nu->bp;
			for(a=0; a<nu->pntsu; a++) {
				enda= -1;
				starta= a;
				while(bp->f1 & flag) {
					select_bpoint(bp, DESELECT, flag, HIDDEN);
					enda= a;
					if(a>=nu->pntsu-1) break;
					a++;
					bp++;
				}
				if(enda>=starta) {
					newnu = (Nurb*)MEM_mallocN(sizeof(Nurb), "adduplicateN3");  
					memcpy(newnu, nu, sizeof(Nurb));
					set_actNurb(obedit, newnu);
					BLI_addtail(editnurb, newnu);
					newnu->pntsu= enda-starta+1;
					newnu->bp = (BPoint*)MEM_mallocN((enda-starta+1) * sizeof(BPoint), "adduplicateN4");
					memcpy(newnu->bp, nu->bp+starta, newnu->pntsu*sizeof(BPoint));

					b= newnu->pntsu;
					bp1= newnu->bp;
					while(b--) {
						select_bpoint(bp1, SELECT, flag, HIDDEN);
						bp1++;
					}

					if(nu->flagu & CU_CYCLIC) {
						if(starta!=0 || enda!=nu->pntsu-1) {
							newnu->flagu &= ~CU_CYCLIC;
						}
					}

					/* knots */
					newnu->knotsu= NULL;
					makeknots(newnu, 1);
				}
				bp++;
			}
		}
		else {
			/* a rectangular area in nurb has to be selected */
			if(isNurbsel(nu)) {
				usel= MEM_callocN(nu->pntsu, "adduplicateN4");
				bp= nu->bp;
				for(a=0; a<nu->pntsv; a++) {
					for(b=0; b<nu->pntsu; b++, bp++) {
						if(bp->f1 & flag) usel[b]++;
					}
				}
				newu= 0;
				newv= 0;
				for(a=0; a<nu->pntsu; a++) {
					if(usel[a]) {
						if(newv==0 || usel[a]==newv) {
							newv= usel[a];
							newu++;
						}
						else {
							newv= 0;
							break;
						}
					}
				}
				if(newu==0 || newv==0) {
					printf("Can't duplicate Nurb\n");
				}
				else {

					if(newu==1) SWAP(short, newu, newv);

					newnu = (Nurb*)MEM_mallocN(sizeof(Nurb), "adduplicateN5");
					memcpy(newnu, nu, sizeof(Nurb));
					BLI_addtail(editnurb, newnu);
					set_actNurb(obedit, newnu);
					newnu->pntsu= newu;
					newnu->pntsv= newv;
					newnu->bp =
						(BPoint*)MEM_mallocN(newu * newv * sizeof(BPoint), "adduplicateN6");
					clamp_nurb_order_u(newnu);
					clamp_nurb_order_v(newnu);
					
					newnu->knotsu= newnu->knotsv= NULL;
					
					bp= newnu->bp;
					bp1= nu->bp;
					for(a=0; a<nu->pntsv; a++) {
						for(b=0; b<nu->pntsu; b++, bp1++) {
							if(bp1->f1 & flag) {
								memcpy(bp, bp1, sizeof(BPoint));
								select_bpoint(bp1, DESELECT, flag, HIDDEN);
								bp++;
							}
						}
					}
					if (check_valid_nurb_u(newnu)) {
						if(nu->pntsu==newnu->pntsu && nu->knotsu) {
							newnu->knotsu= MEM_dupallocN( nu->knotsu );
						} else {
							makeknots(newnu, 1);
						}
					}
					if (check_valid_nurb_v(newnu)) {
						if(nu->pntsv==newnu->pntsv && nu->knotsv) {
							newnu->knotsv= MEM_dupallocN( nu->knotsv );
						} else {
							makeknots(newnu, 2);
						}
					}
				}
				MEM_freeN(usel);
			}
		}

		nu= nu->prev;
	}
	
	/* actnu changed */
}

/**************** switch direction operator ***************/

static int switch_direction_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	
	for(nu= editnurb->first; nu; nu= nu->next)
		if(isNurbsel(nu))
			switchdirectionNurb(nu);
	
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_switch_direction(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Switch Direction";
	ot->idname= "CURVE_OT_switch_direction";
	
	/* api callbacks */
	ot->exec= switch_direction_exec;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/****************** set weight operator *******************/

static int set_weight_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	float weight= RNA_float_get(op->ptr, "weight");
	int a;
				
	for(nu= editnurb->first; nu; nu= nu->next) {
		if(nu->bezt) {
			for(bezt=nu->bezt, a=0; a<nu->pntsu; a++, bezt++) {
				if(bezt->f2 & SELECT)
					bezt->weight= weight;
			}
		}
		else if(nu->bp) {
			for(bp=nu->bp, a=0; a<nu->pntsu*nu->pntsv; a++, bp++) {
				if(bp->f1 & SELECT)
					bp->weight= weight;
			}
		}
	}	

	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_spline_weight_set(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Set Curve Weight";
	ot->idname= "CURVE_OT_spline_weight_set";
	
	/* api callbacks */
	ot->exec= set_weight_exec;
	ot->invoke= WM_operator_props_popup;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_float_percentage(ot->srna, "weight", 1.0f, 0.0f, 1.0f, "Weight", "", 0.0f, 1.0f);
}

/******************* set radius operator ******************/

static int set_radius_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	float radius= RNA_float_get(op->ptr, "radius");
	int a;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		if(nu->bezt) {
			for(bezt=nu->bezt, a=0; a<nu->pntsu; a++, bezt++) {
				if(bezt->f2 & SELECT)
					bezt->radius= radius;
			}
		}
		else if(nu->bp) {
			for(bp=nu->bp, a=0; a<nu->pntsu*nu->pntsv; a++, bp++) {
				if(bp->f1 & SELECT)
					bp->radius= radius;
			}
		}
	}	

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_radius_set(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Set Curve Radius";
	ot->idname= "CURVE_OT_radius_set";
	
	/* api callbacks */
	ot->exec= set_radius_exec;
	ot->invoke= WM_operator_props_popup;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_float(ot->srna, "radius", 1.0f, 0.0f, FLT_MAX, "Radius", "", 0.0001f, 10.0f);
}

/********************* smooth operator ********************/

static int smooth_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt, *beztOrig;
	BPoint *bp, *bpOrig;
	float val, newval, offset;
	int a, i, change = 0;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		if(nu->bezt) {
			change = 0;
			beztOrig = MEM_dupallocN( nu->bezt );
			for(bezt=nu->bezt+1, a=1; a<nu->pntsu-1; a++, bezt++) {
				if(bezt->f2 & SELECT) {
					for(i=0; i<3; i++) {
						val = bezt->vec[1][i];
						newval = ((beztOrig+(a-1))->vec[1][i] * 0.5) + ((beztOrig+(a+1))->vec[1][i] * 0.5);
						offset = (val*((1.0/6.0)*5)) + (newval*(1.0/6.0)) - val;
						/* offset handles */
						bezt->vec[1][i] += offset;
						bezt->vec[0][i] += offset;
						bezt->vec[2][i] += offset;
					}
					change = 1;
				}
			}
			MEM_freeN(beztOrig);
			if (change)
				calchandlesNurb(nu);
		} else if (nu->bp) {
			bpOrig = MEM_dupallocN( nu->bp );
			/* Same as above, keep these the same! */
			for(bp=nu->bp+1, a=1; a<nu->pntsu-1; a++, bp++) {
				if(bp->f1 & SELECT) {
					for(i=0; i<3; i++) {
						val = bp->vec[i];
						newval = ((bpOrig+(a-1))->vec[i] * 0.5) + ((bpOrig+(a+1))->vec[i] * 0.5);
						offset = (val*((1.0/6.0)*5)) + (newval*(1.0/6.0)) - val;
					
						bp->vec[i] += offset;
					}
				}
			}
			MEM_freeN(bpOrig);
		}
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_smooth(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Smooth";
	ot->idname= "CURVE_OT_smooth";
	
	/* api callbacks */
	ot->exec= smooth_exec;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/**************** smooth curve radius operator *************/

/* TODO, make smoothing distance based */
static int smooth_radius_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a;
	
	/* use for smoothing */
	int last_sel;
	int start_sel, end_sel; /* selection indicies, inclusive */
	float start_rad, end_rad, fac, range;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		if(nu->bezt) {
			
			for (last_sel=0; last_sel < nu->pntsu; last_sel++) {
				/* loop over selection segments of a curve, smooth each */
				
				/* Start BezTriple code, this is duplicated below for points, make sure these functions stay in sync */
				start_sel = end_sel = -1;
				for(bezt=nu->bezt+last_sel, a=last_sel; a<nu->pntsu; a++, bezt++) {
					if(bezt->f2 & SELECT) {
						start_sel = a;
						break;
					}
				}
				/* incase there are no other selected verts */
				end_sel = start_sel;
				for(bezt=nu->bezt+(start_sel+1), a=start_sel+1; a<nu->pntsu; a++, bezt++) {
					if((bezt->f2 & SELECT)==0) {
						break;
					}
					end_sel = a;
				}
				
				if (start_sel == -1) {
					last_sel = nu->pntsu; /* next... */
				} else {
					last_sel = end_sel; /* before we modify it */
					
					/* now blend between start and end sel */
					start_rad = end_rad = -1.0;
					
					if (start_sel == end_sel) {
						/* simple, only 1 point selected */
						if (start_sel>0)						start_rad = (nu->bezt+start_sel-1)->radius;
						if (end_sel!=-1 && end_sel < nu->pntsu)	end_rad = (nu->bezt+start_sel+1)->radius;
						
						if (start_rad >= 0.0 && end_rad >= 0.0)	(nu->bezt+start_sel)->radius = (start_rad + end_rad)/2;
						else if (start_rad >= 0.0)				(nu->bezt+start_sel)->radius = start_rad;
						else if (end_rad >= 0.0)				(nu->bezt+start_sel)->radius = end_rad;
					} else {
						/* if endpoints selected, then use them */
						if (start_sel==0) {
							start_rad = (nu->bezt+start_sel)->radius;
							start_sel++; /* we dont want to edit the selected endpoint */
						} else {
							start_rad = (nu->bezt+start_sel-1)->radius;
						}
						if (end_sel==nu->pntsu-1) {
							end_rad = (nu->bezt+end_sel)->radius;
							end_sel--; /* we dont want to edit the selected endpoint */
						} else {
							end_rad = (nu->bezt+end_sel+1)->radius;
						}
						
						/* Now Blend between the points */
						range = (float)(end_sel - start_sel) + 2.0f;
						for(bezt=nu->bezt+start_sel, a=start_sel; a<=end_sel; a++, bezt++) {
							fac = (float)(1+a-start_sel) / range;
							bezt->radius = start_rad*(1.0-fac) + end_rad*fac;
						}
					}
				}
			}
		} else if (nu->bp) {
			/* Same as above, keep these the same! */
			for (last_sel=0; last_sel < nu->pntsu; last_sel++) {
				/* loop over selection segments of a curve, smooth each */
				
				/* Start BezTriple code, this is duplicated below for points, make sure these functions stay in sync */
				start_sel = end_sel = -1;
				for(bp=nu->bp+last_sel, a=last_sel; a<nu->pntsu; a++, bp++) {
					if(bp->f1 & SELECT) {
						start_sel = a;
						break;
					}
				}
				/* incase there are no other selected verts */
				end_sel = start_sel;
				for(bp=nu->bp+(start_sel+1), a=start_sel+1; a<nu->pntsu; a++, bp++) {
					if((bp->f1 & SELECT)==0) {
						break;
					}
					end_sel = a;
				}
				
				if (start_sel == -1) {
					last_sel = nu->pntsu; /* next... */
				} else {
					last_sel = end_sel; /* before we modify it */
					
					/* now blend between start and end sel */
					start_rad = end_rad = -1.0;
					
					if (start_sel == end_sel) {
						/* simple, only 1 point selected */
						if (start_sel>0)						start_rad = (nu->bp+start_sel-1)->radius;
						if (end_sel!=-1 && end_sel < nu->pntsu)	end_rad = (nu->bp+start_sel+1)->radius;
						
						if (start_rad >= 0.0 && end_rad >= 0.0)	(nu->bp+start_sel)->radius = (start_rad + end_rad)/2;
						else if (start_rad >= 0.0)				(nu->bp+start_sel)->radius = start_rad;
						else if (end_rad >= 0.0)				(nu->bp+start_sel)->radius = end_rad;
					} else {
						/* if endpoints selected, then use them */
						if (start_sel==0) {
							start_rad = (nu->bp+start_sel)->radius;
							start_sel++; /* we dont want to edit the selected endpoint */
						} else {
							start_rad = (nu->bp+start_sel-1)->radius;
						}
						if (end_sel==nu->pntsu-1) {
							end_rad = (nu->bp+end_sel)->radius;
							end_sel--; /* we dont want to edit the selected endpoint */
						} else {
							end_rad = (nu->bp+end_sel+1)->radius;
						}
						
						/* Now Blend between the points */
						range = (float)(end_sel - start_sel) + 2.0f;
						for(bp=nu->bp+start_sel, a=start_sel; a<=end_sel; a++, bp++) {
							fac = (float)(1+a-start_sel) / range;
							bp->radius = start_rad*(1.0-fac) + end_rad*fac;
						}
					}
				}
			}
		}
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_smooth_radius(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Smooth Curve Radius";
	ot->idname= "CURVE_OT_smooth_radius";
	
	/* api clastbacks */
	ot->exec= smooth_radius_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/***************** selection utility *************************/

/* next == 1 -> select next 		*/
/* next == -1 -> select previous 	*/
/* cont == 1 -> select continuously 	*/
/* selstatus, inverts behaviour		*/
static void select_adjacent_cp(ListBase *editnurb, short next, short cont, short selstatus)
{
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a;
	short lastsel= 0, sel=0;
	
	if(next==0) return;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		lastsel=0;
		if((nu->type & 7)==CU_BEZIER) {			
			a= nu->pntsu;
			bezt= nu->bezt;
			if(next < 0) bezt= (nu->bezt + (a-1));
			while(a--) {
				if(a-abs(next) < 0) break;
				sel= 0;
				if((lastsel==0) && (bezt->hide==0) && ((bezt->f2 & SELECT) || (selstatus==0))) {
					bezt+=next;
					if(!(bezt->f2 & SELECT) || (selstatus==0)) {
						sel= select_beztriple(bezt, selstatus, 1, VISIBLE);	
						if((sel==1) && (cont==0)) lastsel= 1;
					}							
				}
				else {
					bezt+=next;
					lastsel= 0;
				}
				/* move around in zigzag way so that we go through each */				
				bezt-=(next-next/abs(next));				
			}
		}
		else {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			if(next < 0) bp= (nu->bp + (a-1));
			while(a--) {
				if(a-abs(next) < 0) break;
				sel=0;
				if((lastsel==0) && (bp->hide==0) && ((bp->f1 & SELECT) || (selstatus==0))) {
					bp+=next;
					if(!(bp->f1 & SELECT) || (selstatus==0)) {
						sel= select_bpoint(bp, selstatus, 1, VISIBLE);
						if((sel==1) && (cont==0)) lastsel= 1;
					}			
				}
				else {
					bp+=next;
					lastsel= 0;
				}
				/* move around in zigzag way so that we go through each */
				bp-=(next-next/abs(next));				
			}
		}
	}
}

/**************** select start/end operators **************/

/* (de)selects first or last of visible part of each Nurb depending on selFirst     */
/* selFirst: defines the end of which to select					    */
/* doswap: defines if selection state of each first/last control point is swapped   */
/* selstatus: selection status in case doswap is false				    */
void selectend_nurb(Object *obedit, short selfirst, short doswap, short selstatus)
{
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BPoint *bp;
	BezTriple *bezt;
	int a;
	short sel;
	
	if(obedit==0) return;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		sel= 0;
		if((nu->type & 7)==CU_BEZIER) {
			a= nu->pntsu;
			
			/* which point? */
			if(selfirst==0) { /* select last */ 
				bezt= (nu->bezt + (a-1));
			}
			else { /* select first */
				bezt= nu->bezt;
			}
			
			while(a--) {
				if(doswap) sel= swap_selection_beztriple(bezt);
				else sel= select_beztriple(bezt, selstatus, 1, VISIBLE);
				
				if(sel==1) break;
			}
		}
		else {
			a= nu->pntsu*nu->pntsv;
			
			/* which point? */
			if(selfirst==0) { /* select last */
				bp= (nu->bp + (a-1));
			}
			else{ /* select first */
				bp= nu->bp;
			}

			while(a--) {
				if (bp->hide == 0) {
					if(doswap) sel= swap_selection_bpoint(bp);
					else sel= select_bpoint(bp, selstatus, 1, VISIBLE);
					
					if(sel==1) break;
				}
			}
		}
	}
}

static int de_select_first_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);

	selectend_nurb(obedit, FIRST, 1, DESELECT);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_de_select_first(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select or Deselect First";
	ot->idname= "CURVE_OT_de_select_first";
	
	/* api cfirstbacks */
	ot->exec= de_select_first_exec;
	ot->poll= ED_operator_editcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

static int de_select_last_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);

	selectend_nurb(obedit, LAST, 1, DESELECT);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_de_select_last(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select or Deselect Last";
	ot->idname= "CURVE_OT_de_select_last";
	
	/* api clastbacks */
	ot->exec= de_select_last_exec;
	ot->poll= ED_operator_editcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************* de select all operator ***************/

static short nurb_has_selected_cps(ListBase *editnurb)
{
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if((nu->type & 7)==CU_BEZIER) {
			a= nu->pntsu;
			bezt= nu->bezt;
			while(a--) {
				if(bezt->hide==0) {
					if((bezt->f1 & SELECT)
					|| (bezt->f2 & SELECT)
					|| (bezt->f3 & SELECT)) return 1;
				}
				bezt++;
			}
		}
		else {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a--) {
				if((bp->hide==0) && (bp->f1 & SELECT)) return 1;
				bp++;
			}
		}
	}
	
	return 0;
}

static int de_select_all_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	
	if(nurb_has_selected_cps(editnurb)) { /* deselect all */
		selectend_nurb(obedit, FIRST, 0, DESELECT); /* set first control points as unselected */
		select_adjacent_cp(editnurb, 1, 1, DESELECT); /* cascade selection */	
	}
	else { /* select all */
		selectend_nurb(obedit, FIRST, 0, SELECT); /* set first control points as selected */
		select_adjacent_cp(editnurb, 1, 1, SELECT); /* cascade selection */
 	}
	
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_all_toggle(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select or Deselect All";
	ot->idname= "CURVE_OT_select_all_toggle";
	
	/* api callbacks */
	ot->exec= de_select_all_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/********************** hide operator *********************/

static int hide_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BPoint *bp;
	BezTriple *bezt;
	int a, sel, invert= RNA_boolean_get(op->ptr, "unselected");

	for(nu= editnurb->first; nu; nu= nu->next) {
		if((nu->type & 7)==CU_BEZIER) {
			bezt= nu->bezt;
			a= nu->pntsu;
			sel= 0;
			while(a--) {
				if(invert == 0 && BEZSELECTED_HIDDENHANDLES(bezt)) {
					select_beztriple(bezt, DESELECT, 1, HIDDEN);
					bezt->hide= 1;
				}
				else if(invert && !BEZSELECTED_HIDDENHANDLES(bezt)) {
					select_beztriple(bezt, DESELECT, 1, HIDDEN);
					bezt->hide= 1;
				}
				if(bezt->hide) sel++;
				bezt++;
			}
			if(sel==nu->pntsu) nu->hide= 1;
		}
		else {
			bp= nu->bp;
			a= nu->pntsu*nu->pntsv;
			sel= 0;
			while(a--) {
				if(invert==0 && (bp->f1 & SELECT)) {
					select_bpoint(bp, DESELECT, 1, HIDDEN);
					bp->hide= 1;
				}
				else if(invert && (bp->f1 & SELECT)==0) {
					select_bpoint(bp, DESELECT, 1, HIDDEN);
					bp->hide= 1;
				}
				if(bp->hide) sel++;
				bp++;
			}
			if(sel==nu->pntsu*nu->pntsv) nu->hide= 1;
		}
	}

	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;	
}

void CURVE_OT_hide(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Hide Selected";
	ot->idname= "CURVE_OT_hide";
	
	/* api callbacks */
	ot->exec= hide_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
	
	/* props */
	RNA_def_boolean(ot->srna, "unselected", 0, "Unselected", "Hide unselected rather than selected.");
}

/********************** reveal operator *********************/

static int reveal_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BPoint *bp;
	BezTriple *bezt;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		nu->hide= 0;
		if((nu->type & 7)==CU_BEZIER) {
			bezt= nu->bezt;
			a= nu->pntsu;
			while(a--) {
				if(bezt->hide) {
					select_beztriple(bezt, SELECT, 1, HIDDEN);
					bezt->hide= 0;
				}
				bezt++;
			}
		}
		else {
			bp= nu->bp;
			a= nu->pntsu*nu->pntsv;
			while(a--) {
				if(bp->hide) {
					select_bpoint(bp, SELECT, 1, HIDDEN);
					bp->hide= 0;
				}
				bp++;
			}
		}
	}

	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;	
}

void CURVE_OT_reveal(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Reveal Hidden";
	ot->idname= "CURVE_OT_reveal";
	
	/* api callbacks */
	ot->exec= reveal_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/********************** select invert operator *********************/

static int select_inverse_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BPoint *bp;
	BezTriple *bezt;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if((nu->type & 7)==CU_BEZIER) {
			bezt= nu->bezt;
			a= nu->pntsu;
			while(a--) {
				if(bezt->hide==0) {
					bezt->f2 ^= SELECT; /* always do the center point */
					if ((G.f & G_HIDDENHANDLES)==0) {
						bezt->f1 ^= SELECT;
						bezt->f3 ^= SELECT;
					}
				}
				bezt++;
			}
		}
		else {
			bp= nu->bp;
			a= nu->pntsu*nu->pntsv;
			while(a--) {
				swap_selection_bpoint(bp);
				bp++;
			}
		}
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;	
}

void CURVE_OT_select_inverse(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Inverse";
	ot->idname= "CURVE_OT_select_inverse";
	
	/* api callbacks */
	ot->exec= select_inverse_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/********************** subdivide operator *********************/

/** Divide the line segments associated with the currently selected
 * curve nodes (Bezier or NURB). If there are no valid segment
 * selections within the current selection, nothing happens.
 *
 * @deffunc subdividenurb subdivideNurb(void)
 * @return Nothing
 * @param  None
*/

static int subdivide_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *prevbezt, *bezt, *beztnew, *beztn;
	BPoint *bp, *prevbp, *bpnew, *bpn;
	float vec[15];
	int a, b, sel, amount, *usel, *vsel;

   // printf("*** subdivideNurb: entering subdivide\n");

	for(nu= editnurb->first; nu; nu= nu->next) {
		amount= 0;
		if((nu->type & 7)==CU_BEZIER) {
        /* 
           Insert a point into a 2D Bezier curve. 
           Endpoints are preserved. Otherwise, all selected and inserted points are 
           newly created. Old points are discarded.
        */
			/* count */
			if(nu->flagu & CU_CYCLIC) {
				a= nu->pntsu;
				bezt= nu->bezt;
				prevbezt= bezt+(a-1);
			}
			else {
				a= nu->pntsu-1;
				prevbezt= nu->bezt;
				bezt= prevbezt+1;
			}
			while(a--) {
				if( BEZSELECTED_HIDDENHANDLES(prevbezt) && BEZSELECTED_HIDDENHANDLES(bezt) ) amount++;
				prevbezt= bezt;
				bezt++;
			}

			if(amount) {
				/* insert */
				beztnew =
					(BezTriple*)MEM_mallocN((amount + nu->pntsu) * sizeof(BezTriple), "subdivNurb");
				beztn= beztnew;
				if(nu->flagu & CU_CYCLIC) {
					a= nu->pntsu;
					bezt= nu->bezt;
					prevbezt= bezt+(a-1);
				}
				else {
					a= nu->pntsu-1;
					prevbezt= nu->bezt;
					bezt= prevbezt+1;
				}
				while(a--) {
					memcpy(beztn, prevbezt, sizeof(BezTriple));
					beztn++;

					if( BEZSELECTED_HIDDENHANDLES(prevbezt) && BEZSELECTED_HIDDENHANDLES(bezt) ) {
						memcpy(beztn, bezt, sizeof(BezTriple));
						
						/* midpoint subdividing */
						VecMidf(vec, prevbezt->vec[1], prevbezt->vec[2]);
						VecMidf(vec+3, prevbezt->vec[2], bezt->vec[0]);
						VecMidf(vec+6, bezt->vec[0], bezt->vec[1]);
						
						VecMidf(vec+9, vec, vec+3);
						VecMidf(vec+12, vec+3, vec+6);
						
						/* change handle of prev beztn */
						VECCOPY((beztn-1)->vec[2], vec);
						/* new point */
						VECCOPY(beztn->vec[0], vec+9);
						VecMidf(beztn->vec[1], vec+9, vec+12);
						VECCOPY(beztn->vec[2], vec+12);
						/* handle of next bezt */
						if(a==0 && (nu->flagu & CU_CYCLIC)) {VECCOPY(beztnew->vec[0], vec+6);}
						else {VECCOPY(bezt->vec[0], vec+6);}
						
						beztn->radius = (prevbezt->radius + bezt->radius)/2.0f;
						beztn->weight = (prevbezt->weight + bezt->weight)/2.0f;
						
						beztn++;
					}

					prevbezt= bezt;
					bezt++;
				}
				/* last point */
				if((nu->flagu & CU_CYCLIC)==0) memcpy(beztn, prevbezt, sizeof(BezTriple));

				MEM_freeN(nu->bezt);
				nu->bezt= beztnew;
				nu->pntsu+= amount;

				calchandlesNurb(nu);
			}
		} /* End of 'if((nu->type & 7)==CU_BEZIER)' */
		else if (nu->pntsv==1) {
        /* 
           All flat lines (ie. co-planar), except flat Nurbs. Flat NURB curves 
           are handled together with the regular NURB plane division, as it 
           should be. I split it off just now, let's see if it is
           stable... nzc 30-5-'00
         */
			/* count */
			if(nu->flagu & CU_CYCLIC) {
				a= nu->pntsu;
				bp= nu->bp;
				prevbp= bp+(a-1);
			}
			else {
				a= nu->pntsu-1;
				prevbp= nu->bp;
				bp= prevbp+1;
			}
			while(a--) {
				if( (bp->f1 & SELECT) && (prevbp->f1 & SELECT) ) amount++;
				prevbp= bp;
				bp++;
			}

			if(amount) {
				/* insert */
				bpnew =
					(BPoint*)MEM_mallocN((amount + nu->pntsu) * sizeof(BPoint), "subdivNurb2");
				bpn= bpnew;

				if(nu->flagu & CU_CYCLIC) {
					a= nu->pntsu;
					bp= nu->bp;
					prevbp= bp+(a-1);
				}
				else {
					a= nu->pntsu-1;
					prevbp= nu->bp;
					bp= prevbp+1;
				}
				while(a--) {
					memcpy(bpn, prevbp, sizeof(BPoint));
					bpn++;

					if( (bp->f1 & SELECT) && (prevbp->f1 & SELECT) ) {
                 // printf("*** subdivideNurb: insert 'linear' point\n");
						memcpy(bpn, bp, sizeof(BPoint));
						bpn->vec[0]= (prevbp->vec[0]+bp->vec[0])/2.0;
						bpn->vec[1]= (prevbp->vec[1]+bp->vec[1])/2.0;
						bpn->vec[2]= (prevbp->vec[2]+bp->vec[2])/2.0;
						bpn->vec[3]= (prevbp->vec[3]+bp->vec[3])/2.0;
						bpn++;

					}
					prevbp= bp;
					bp++;
				}
				if((nu->flagu & CU_CYCLIC)==0) memcpy(bpn, prevbp, sizeof(BPoint));	/* last point */

				MEM_freeN(nu->bp);
				nu->bp= bpnew;
				nu->pntsu+= amount;

				if(nu->type & CU_NURBS) {
					makeknots(nu, 1);
				}
			}
		} /* End of 'else if(nu->pntsv==1)' */
		else if((nu->type & 7)==CU_NURBS) {
        /* This is a very strange test ... */
        /** 
           Subdivide NURB surfaces - nzc 30-5-'00 -
           
             Subdivision of a NURB curve can be effected by adding a 
           control point (insertion of a knot), or by raising the
           degree of the functions used to build the NURB. The
           expression 

               degree = #knots - #controlpoints + 1 (J Walter piece)
               degree = #knots - #controlpoints     (Blender
                                                      implementation)
                 ( this is confusing.... what is true? Another concern
                 is that the JW piece allows the curve to become
                 explicitly 1st order derivative discontinuous, while
                 this is not what we want here... )

           is an invariant for a single NURB curve. Raising the degree
           of the NURB is done elsewhere; the degree is assumed
           constant during this opration. Degree is a property shared
           by all controlpoints in a curve (even though it is stored
           per control point - this can be misleading).
             Adding a knot is done by searching for the place in the
           knot vector where a certain knot value must be inserted, or
           by picking an appropriate knot value between two existing
           ones. The number of controlpoints that is influenced by the
           insertion depends on the order of the curve. A certain
           minimum number of knots is needed to form high-order
           curves, as can be seen from the equation above. In Blender,
           currently NURBs may be up to 6th order, so we modify at
           most 6 points. One point is added. For an n-degree curve,
           n points are discarded, and n+1 points inserted
           (so effectively, n points are modified).  (that holds for
           the JW piece, but it seems not for our NURBs)
              In practice, the knot spacing is copied, but the tail
           (the points following the insertion point) need to be
           offset to keep the knot series ascending. The knot series
           is always a series of monotonically ascending integers in
           Blender. When not enough control points are available to
           fit the order, duplicates of the endpoints are added as
           needed. 
        */
			/* selection-arrays */
			usel= MEM_callocN(sizeof(int)*nu->pntsu, "subivideNurb3");
			vsel= MEM_callocN(sizeof(int)*nu->pntsv, "subivideNurb3");
			sel= 0;

         /* Count the number of selected points. */
			bp= nu->bp;
			for(a=0; a<nu->pntsv; a++) {
				for(b=0; b<nu->pntsu; b++) {
					if(bp->f1 & SELECT) {
						usel[b]++;
						vsel[a]++;
						sel++;
					}
					bp++;
				}
			}
			if( sel == (nu->pntsu*nu->pntsv) ) {	/* subdivide entire nurb */
           /* Global subdivision is a special case of partial
              subdivision. Strange it is considered separately... */
				bpn=bpnew= MEM_mallocN( (2*nu->pntsu-1)*(2*nu->pntsv-1)*sizeof(BPoint), "subdivideNurb4");
				bp= nu->bp;
				/* first subdivide rows */
				for(a=0; a<nu->pntsv; a++) {
					for(b=0; b<nu->pntsu; b++) {
						*bpn= *bp;
						bpn++; 
						bp++;
						if(b<nu->pntsu-1) {
							*bpn= *bp;
							prevbp= bp-1;
							bpn->vec[0]= (prevbp->vec[0]+bp->vec[0])/2.0;
							bpn->vec[1]= (prevbp->vec[1]+bp->vec[1])/2.0;
							bpn->vec[2]= (prevbp->vec[2]+bp->vec[2])/2.0;
							bpn->vec[3]= (prevbp->vec[3]+bp->vec[3])/2.0;
							bpn++;
						}
					}
					bpn+= (2*nu->pntsu-1);
				}
				/* now insert new */
				bpn= bpnew+(2*nu->pntsu-1);
				bp= bpnew+(4*nu->pntsu-2);
				prevbp= bpnew;
				for(a=1; a<nu->pntsv; a++) {

					for(b=0; b<2*nu->pntsu-1; b++) {
						*bpn= *bp;
						bpn->vec[0]= (prevbp->vec[0]+bp->vec[0])/2.0;
						bpn->vec[1]= (prevbp->vec[1]+bp->vec[1])/2.0;
						bpn->vec[2]= (prevbp->vec[2]+bp->vec[2])/2.0;
						bpn->vec[3]= (prevbp->vec[3]+bp->vec[3])/2.0;
						bpn++; 
						bp++; 
						prevbp++;
					}
					bp+= (2*nu->pntsu-1);
					bpn+= (2*nu->pntsu-1);
					prevbp+= (2*nu->pntsu-1);
				}
				MEM_freeN(nu->bp);
				nu->bp= bpnew;
				nu->pntsu= 2*nu->pntsu-1;
				nu->pntsv= 2*nu->pntsv-1;
				makeknots(nu, 1);
				makeknots(nu, 2);
			} /* End of 'if(sel== nu->pntsu*nu->pntsv)' (subdivide entire NURB) */
			else {
				/* subdivide in v direction? */
				sel= 0;
				for(a=0; a<nu->pntsv-1; a++) {
					if(vsel[a]==nu->pntsu && vsel[a+1]==nu->pntsu) sel++;
				}

				if(sel) {   /* V ! */
					bpn=bpnew= MEM_mallocN( (sel+nu->pntsv)*nu->pntsu*sizeof(BPoint), "subdivideNurb4");
					bp= nu->bp;
					for(a=0; a<nu->pntsv; a++) {
						for(b=0; b<nu->pntsu; b++) {
							*bpn= *bp;
							bpn++; 
							bp++;
						}
						if( (a<nu->pntsv-1) && vsel[a]==nu->pntsu && vsel[a+1]==nu->pntsu ) {
							prevbp= bp- nu->pntsu;
							for(b=0; b<nu->pntsu; b++) {
                       /* 
                          This simple bisection must be replaces by a
                          subtle resampling of a number of points. Our 
                          task is made slightly easier because each
                          point in our curve is a separate data
                          node. (is it?)
                       */
								*bpn= *prevbp;
								bpn->vec[0]= (prevbp->vec[0]+bp->vec[0])/2.0;
								bpn->vec[1]= (prevbp->vec[1]+bp->vec[1])/2.0;
								bpn->vec[2]= (prevbp->vec[2]+bp->vec[2])/2.0;
								bpn->vec[3]= (prevbp->vec[3]+bp->vec[3])/2.0;
								bpn++;
								prevbp++;
								bp++;
							}
							bp-= nu->pntsu;
						}
					}
					MEM_freeN(nu->bp);
					nu->bp= bpnew;
					nu->pntsv+= sel;
					makeknots(nu, 2);
				}
				else {
					/* or in u direction? */
					sel= 0;
					for(a=0; a<nu->pntsu-1; a++) {
						if(usel[a]==nu->pntsv && usel[a+1]==nu->pntsv) sel++;
					}

					if(sel) {	/* U ! */
                 /* Inserting U points is sort of 'default' Flat curves only get */
                 /* U points inserted in them.                                   */
						bpn=bpnew= MEM_mallocN( (sel+nu->pntsu)*nu->pntsv*sizeof(BPoint), "subdivideNurb4");
						bp= nu->bp;
						for(a=0; a<nu->pntsv; a++) {
							for(b=0; b<nu->pntsu; b++) {
								*bpn= *bp;
								bpn++; 
								bp++;
								if( (b<nu->pntsu-1) && usel[b]==nu->pntsv && usel[b+1]==nu->pntsv ) {
                          /* 
                             One thing that bugs me here is that the
                             orders of things are not the same as in
                             the JW piece. Also, this implies that we
                             handle at most 3rd order curves? I miss
                             some symmetry here...
                          */
									prevbp= bp- 1;
									*bpn= *prevbp;
									bpn->vec[0]= (prevbp->vec[0]+bp->vec[0])/2.0;
									bpn->vec[1]= (prevbp->vec[1]+bp->vec[1])/2.0;
									bpn->vec[2]= (prevbp->vec[2]+bp->vec[2])/2.0;
									bpn->vec[3]= (prevbp->vec[3]+bp->vec[3])/2.0;
									bpn++;
								}
							}
						}
						MEM_freeN(nu->bp);
						nu->bp= bpnew;
						nu->pntsu+= sel;
						makeknots(nu, 1); /* shift knots
                                                     forward */
					}
				}
			}
			MEM_freeN(usel); 
			MEM_freeN(vsel);

		} /* End of 'if((nu->type & 7)==CU_NURBS)'  */
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;	
}

void CURVE_OT_subdivide(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Subdivide";
	ot->idname= "CURVE_OT_subdivide";
	
	/* api callbacks */
	ot->exec= subdivide_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************** find nearest ************************/

static void findnearestNurbvert__doClosest(void *userData, Nurb *nu, BPoint *bp, BezTriple *bezt, int beztindex, int x, int y)
{
	struct { BPoint *bp; BezTriple *bezt; Nurb *nurb; int dist, hpoint, select, mval[2]; } *data = userData;

	short flag;
	short temp;

	if (bp) {
		flag = bp->f1;
	} else {
		if (beztindex==0) {
			flag = bezt->f1;
		} else if (beztindex==1) {
			flag = bezt->f2;
		} else {
			flag = bezt->f3;
		}
	}

	temp = abs(data->mval[0]-x) + abs(data->mval[1]-y);
	if ((flag&1)==data->select) temp += 5;
	if (bezt && beztindex==1) temp += 3; /* middle points get a small disadvantage */

	if (temp<data->dist) {
		data->dist = temp;

		data->bp = bp;
		data->bezt = bezt;
		data->nurb = nu;
		data->hpoint = bezt?beztindex:0;
	}
}

static short findnearestNurbvert(ViewContext *vc, short sel, int mval[2], Nurb **nurb, BezTriple **bezt, BPoint **bp)
{
		/* sel==1: selected gets a disadvantage */
		/* in nurb and bezt or bp the nearest is written */
		/* return 0 1 2: handlepunt */
	struct { BPoint *bp; BezTriple *bezt; Nurb *nurb; int dist, hpoint, select, mval[2]; } data = {0};

	data.dist = 100;
	data.hpoint = 0;
	data.select = sel;
	data.mval[0] = mval[0];
	data.mval[1] = mval[1];

	nurbs_foreachScreenVert(vc, findnearestNurbvert__doClosest, &data);

	*nurb = data.nurb;
	*bezt = data.bezt;
	*bp = data.bp;

	return data.hpoint;
}

static void findselectedNurbvert(ListBase *editnurb, Nurb **nu, BezTriple **bezt, BPoint **bp)
{
	/* in nu and (bezt or bp) selected are written if there's 1 sel.  */
	/* if more points selected in 1 spline: return only nu, bezt and bp are 0 */
	Nurb *nu1;
	BezTriple *bezt1;
	BPoint *bp1;
	int a;

	*nu= 0;
	*bezt= 0;
	*bp= 0;
	for(nu1= editnurb->first; nu1; nu1= nu1->next) {
		if((nu1->type & 7)==CU_BEZIER) {
			bezt1= nu1->bezt;
			a= nu1->pntsu;
			while(a--) {
				if( (bezt1->f1 & SELECT) || (bezt1->f2 & SELECT) || (bezt1->f3 & SELECT) ) {
					if(*nu!=0 && *nu!= nu1) {
						*nu= 0;
						*bp= 0;
						*bezt= 0;
						return;
					}
					else if(*bezt || *bp) {
						*bp= 0;
						*bezt= 0;
					}
					else {
						*bezt= bezt1;
						*nu= nu1;
					}
				}
				bezt1++;
			}
		}
		else {
			bp1= nu1->bp;
			a= nu1->pntsu*nu1->pntsv;
			while(a--) {
				if( bp1->f1 & 1 ) {
					if(*nu!=0 && *nu!= nu1) {
						*bp= 0;
						*bezt= 0;
						*nu= 0;
						return;
					}
					else if(*bezt || *bp) {
						*bp= 0;
						*bezt= 0;
					}
					else {
						*bp= bp1;
						*nu= nu1;
					}
				}
				bp1++;
			}
		}
	}
}

/***************** set spline type operator *******************/

static int convertspline(short type, Nurb *nu)
{
	BezTriple *bezt;
	BPoint *bp;
	int a, c, nr;

	if((nu->type & 7)==CU_POLY) {
		if(type==CU_BEZIER) {			    /* to Bezier with vecthandles  */
			nr= nu->pntsu;
			bezt =
				(BezTriple*)MEM_callocN(nr * sizeof(BezTriple), "setsplinetype2");
			nu->bezt= bezt;
			a= nr;
			bp= nu->bp;
			while(a--) {
				VECCOPY(bezt->vec[1], bp->vec);
				bezt->f1=bezt->f2=bezt->f3= bp->f1;
				bezt->h1= bezt->h2= HD_VECT;
				bezt->weight= bp->weight;
				bezt->radius= bp->radius;
				bp++;
				bezt++;
			}
			MEM_freeN(nu->bp);
			nu->bp= 0;
			nu->pntsu= nr;
			nu->type &= ~7;
			nu->type |= CU_BEZIER;
			calchandlesNurb(nu);
		}
		else if(type==CU_NURBS) {
			nu->type &= ~7;
			nu->type |= CU_NURBS;
			nu->orderu= 4;
			nu->flagu &= CU_CYCLIC; /* disable all flags except for cyclic */
			nu->flagu += 4;
			makeknots(nu, 1);
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a--) {
				bp->vec[3]= 1.0;
				bp++;
			}
		}
	}
	else if((nu->type & 7)==CU_BEZIER) {	/* Bezier */
		if(type==0 || type==4) {	    /* to Poly or Nurb */
			nr= 3*nu->pntsu;
			nu->bp = MEM_callocN(nr * sizeof(BPoint), "setsplinetype");
			a= nu->pntsu;
			bezt= nu->bezt;
			bp= nu->bp;
			while(a--) {
				if(type==0 && bezt->h1==HD_VECT && bezt->h2==HD_VECT) {
					/* vector handle becomes 1 poly vertice */
					VECCOPY(bp->vec, bezt->vec[1]);
					bp->vec[3]= 1.0;
					bp->f1= bezt->f2;
					nr-= 2;
					bp->radius= bezt->radius;
					bp->weight= bezt->weight;
					bp++;
				}
				else {
					for(c=0;c<3;c++) {
						VECCOPY(bp->vec, bezt->vec[c]);
						bp->vec[3]= 1.0;
						if(c==0) bp->f1= bezt->f1;
						else if(c==1) bp->f1= bezt->f2;
						else bp->f1= bezt->f3;
						bp->radius= bezt->radius;
						bp->weight= bezt->weight;
						bp++;
					}
				}
				bezt++;
			}
			MEM_freeN(nu->bezt); 
			nu->bezt= 0;
			nu->pntsu= nr;
			nu->pntsv= 1;
			nu->orderu= 4;
			nu->orderv= 1;
			nu->type &= ~7;
			nu->type+= type;
			if(nu->flagu & CU_CYCLIC) c= nu->orderu-1; 
			else c= 0;
			if(type== 4) {
				nu->flagu &= CU_CYCLIC; /* disable all flags except for cyclic */
				nu->flagu += 4;
				makeknots(nu, 1);
			}
		}
	}
	else if((nu->type & 7)==CU_NURBS) {
		if(type==0) {			/* to Poly */
			nu->type &= ~7;
			if(nu->knotsu) MEM_freeN(nu->knotsu); /* python created nurbs have a knotsu of zero */
			nu->knotsu= NULL;
			if(nu->knotsv) MEM_freeN(nu->knotsv);
			nu->knotsv= NULL;
		}
		else if(type==CU_BEZIER) {		/* to Bezier */
			nr= nu->pntsu/3;

			if(nr<2) 
				return 1;	/* conversion impossible */
			else {
				bezt = MEM_callocN(nr * sizeof(BezTriple), "setsplinetype2");
				nu->bezt= bezt;
				a= nr;
				bp= nu->bp;
				while(a--) {
					VECCOPY(bezt->vec[0], bp->vec);
					bezt->f1= bp->f1;
					bp++;
					VECCOPY(bezt->vec[1], bp->vec);
					bezt->f2= bp->f1;
					bp++;
					VECCOPY(bezt->vec[2], bp->vec);
					bezt->f3= bp->f1;
					bezt->radius= bp->radius;
					bezt->weight= bp->weight;
					bp++;
					bezt++;
				}
				MEM_freeN(nu->bp);
				nu->bp= 0;
				MEM_freeN(nu->knotsu);
				nu->knotsu= NULL;
				nu->pntsu= nr;
				nu->type &= ~7;
				nu->type |= CU_BEZIER;
			}
		}
	}

	return 0;
}

static int set_spline_type_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	int changed=0, type= RNA_enum_get(op->ptr, "type");

	if(type==CU_CARDINAL || type==CU_BSPLINE) {
		BKE_report(op->reports, RPT_ERROR, "Not implemented yet");
		return OPERATOR_CANCELLED;
	}
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		if(isNurbsel(nu)) {
			if(convertspline(type, nu))
				BKE_report(op->reports, RPT_ERROR, "No conversion possible");
			else
				changed= 1;
		}
	}

	return (changed)? OPERATOR_FINISHED: OPERATOR_CANCELLED;
}

void CURVE_OT_spline_type_set(wmOperatorType *ot)
{
	static EnumPropertyItem type_items[]= {
		{CU_POLY, "POLY", 0, "Poly", ""},
		{CU_BEZIER, "BEZIER", 0, "Bezier", ""},
		{CU_CARDINAL, "CARDINAL", 0, "Cardinal", ""},
		{CU_BSPLINE, "B_SPLINE", 0, "B-Spline", ""},
		{CU_NURBS, "NURBS", 0, "NURBS", ""},
		{0, NULL, 0, NULL, NULL}};

	/* identifiers */
	ot->name= "Set Spline Type";
	ot->idname= "CURVE_OT_spline_type_set";
	
	/* api callbacks */
	ot->exec= set_spline_type_exec;
	ot->poll= ED_operator_editcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_enum(ot->srna, "type", type_items, CU_POLY, "Type", "Spline type");
}

/***************** set handle type operator *******************/

static int set_handle_type_exec(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);

	sethandlesNurb(editnurb, RNA_enum_get(op->ptr, "type"));

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_handle_type_set(wmOperatorType *ot)
{
	static EnumPropertyItem type_items[]= {
		{1, "AUTOMATIC", 0, "Automatic", ""},
		{2, "VECTOR", 0, "Vector", ""},
		{3, "TOGGLE_FREE_ALIGN", 0, "Toggle Free/Align", ""},
		{5, "ALIGN", 0, "Align", ""},
		{6, "FREE_ALIGN", 0, "Free Align", ""},
		{0, NULL, 0, NULL, NULL}};

	/* identifiers */
	ot->name= "Set Handle Type";
	ot->idname= "CURVE_OT_handle_type_set";
	
	/* api callbacks */
	ot->exec= set_handle_type_exec;
	ot->poll= ED_operator_editcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_enum(ot->srna, "type", type_items, CU_POLY, "Type", "Spline type");
}

/***************** make segment operator **********************/

/* ******************** SKINNING LOFTING!!! ******************** */

static void switchdirection_knots(float *base, int tot)
{
	float *fp1, *fp2, *tempf;
	int a;
	
	if(base==NULL || tot==0) return;
	
	/* reverse knots */
	a= tot;
	fp1= base;
	fp2= fp1+(a-1);
	a/= 2;
	while(fp1!=fp2 && a>0) {
		SWAP(float, *fp1, *fp2);
		a--;
		fp1++; 
		fp2--;
	}
	/* and make in increasing order again */
	a= tot;
	fp1= base;
	fp2=tempf= MEM_mallocN(sizeof(float)*a, "switchdirect");
	while(a--) {
		fp2[0]= fabs(fp1[1]-fp1[0]);
		fp1++;
		fp2++;
	}

	a= tot-1;
	fp1= base;
	fp2= tempf;
	fp1[0]= 0.0;
	fp1++;
	while(a--) {
		fp1[0]= fp1[-1]+fp2[0];
		fp1++;
		fp2++;
	}
	MEM_freeN(tempf);
}

static void rotate_direction_nurb(Nurb *nu)
{
	BPoint *bp1, *bp2, *temp;
	int u, v;
	
	SWAP(short, nu->pntsu, nu->pntsv);
	SWAP(short, nu->orderu, nu->orderv);
	SWAP(short, nu->resolu, nu->resolv);
	SWAP(short, nu->flagu, nu->flagv);
	
	SWAP(float *, nu->knotsu, nu->knotsv);
	switchdirection_knots(nu->knotsv, KNOTSV(nu) );
	
	temp= MEM_dupallocN(nu->bp);
	bp1= nu->bp;
	for(v=0; v<nu->pntsv; v++) {
		for(u=0; u<nu->pntsu; u++, bp1++) {
			bp2= temp + (nu->pntsu-u-1)*(nu->pntsv) + v;
			*bp1= *bp2;
		}
	}

	MEM_freeN(temp);
}

static int is_u_selected(Nurb *nu, int u)
{
	BPoint *bp;
	int v;
	
	/* what about resolu == 2? */
	bp= nu->bp+u;
	for(v=0; v<nu->pntsv-1; v++, bp+=nu->pntsu) {
		if(v) if(bp->f1 & SELECT) return 1;
	}
	
	return 0;
}

typedef struct NurbSort {
	struct NurbSort *next, *prev;
	Nurb *nu;
	float vec[3];
} NurbSort;

static ListBase nsortbase= {0, 0};
/*  static NurbSort *nusmain; */ /* this var seems to go unused... at least in this file */

static void make_selection_list_nurb(ListBase *editnurb)
{
	ListBase nbase= {0, 0};
	NurbSort *nus, *nustest, *headdo, *taildo;
	Nurb *nu;
	BPoint *bp;
	float dist, headdist, taildist;
	int a;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		if( isNurbsel(nu) ) {
			
			nus = (NurbSort*)MEM_callocN(sizeof(NurbSort), "sort");
			BLI_addhead(&nbase, nus);
			nus->nu= nu;
			
			bp= nu->bp;
			a= nu->pntsu;
			while(a--) {
				VecAddf(nus->vec, nus->vec, bp->vec);
				bp++;
			}
			VecMulf(nus->vec, 1.0/(float)nu->pntsu);
			
			
		}
	}

	/* just add the first one */
	nus= nbase.first;
	BLI_remlink(&nbase, nus);
	BLI_addtail( &nsortbase, nus);
	
	/* now add, either at head or tail, the closest one */
	while(nbase.first) {
	
		headdist= taildist= 1.0e30;
		headdo= taildo= 0;

		nustest= nbase.first;
		while(nustest) {
			dist= VecLenf(nustest->vec, ((NurbSort *)nsortbase.first)->vec);

			if(dist<headdist) {
				headdist= dist;
				headdo= nustest;
			}
			dist= VecLenf(nustest->vec, ((NurbSort *)nsortbase.last)->vec);

			if(dist<taildist) {
				taildist= dist;
				taildo= nustest;
			}
			nustest= nustest->next;
		}
		
		if(headdist<taildist) {
			BLI_remlink(&nbase, headdo);
			BLI_addhead(&nsortbase, headdo);
		}
		else {
			BLI_remlink(&nbase, taildo);
			BLI_addtail(&nsortbase, taildo);
		}
	}
}

static void merge_2_nurb(wmOperator *op, ListBase *editnurb, Nurb *nu1, Nurb *nu2)
{
	BPoint *bp, *bp1, *bp2, *temp;
	float  len1, len2;
	int    origu, u, v;
	
	/* first nurbs will be changed to make u = resolu-1 selected */
	/* 2nd nurbs will be changed to make u = 0 selected */

	/* first nurbs: u = resolu-1 selected */
	
	if( is_u_selected(nu1, nu1->pntsu-1) );
	else {
		rotate_direction_nurb(nu1);
		if( is_u_selected(nu1, nu1->pntsu-1) );
		else {
			rotate_direction_nurb(nu1);
			if( is_u_selected(nu1, nu1->pntsu-1) );
			else {
				rotate_direction_nurb(nu1);
				if( is_u_selected(nu1, nu1->pntsu-1) );
				else {
					/* rotate again, now its OK! */
					if(nu1->pntsv!=1) rotate_direction_nurb(nu1);
					return;
				}
			}
		}
	}
	
	/* 2nd nurbs: u = 0 selected */
	if( is_u_selected(nu2, 0) );
	else {
		rotate_direction_nurb(nu2);
		if( is_u_selected(nu2, 0) );
		else {
			rotate_direction_nurb(nu2);
			if( is_u_selected(nu2, 0) );
			else {
				rotate_direction_nurb(nu2);
				if( is_u_selected(nu2, 0) );
				else {
					/* rotate again, now its OK! */
					if(nu1->pntsu==1) rotate_direction_nurb(nu1);
					if(nu2->pntsv!=1) rotate_direction_nurb(nu2);
					return;
				}
			}
		}
	}
	
	if( nu1->pntsv != nu2->pntsv ) {
		BKE_report(op->reports, RPT_ERROR, "Resolution doesn't match");
		return;
	}
	
	/* ok, now nu1 has the rightmost collumn and nu2 the leftmost collumn selected */
	/* maybe we need a 'v' flip of nu2? */
	
	bp1= nu1->bp+nu1->pntsu-1;
	bp2= nu2->bp;
	len1= 0.0;
	
	for(v=0; v<nu1->pntsv; v++, bp1+=nu1->pntsu, bp2+=nu2->pntsu) {
		len1+= VecLenf(bp1->vec, bp2->vec);
	}

	bp1= nu1->bp + nu1->pntsu-1;
	bp2= nu2->bp + nu2->pntsu*(nu2->pntsv-1);
	len2= 0.0;
	
	for(v=0; v<nu1->pntsv; v++, bp1+=nu1->pntsu, bp2-=nu2->pntsu) {
		len2+= VecLenf(bp1->vec, bp2->vec);
	}

	/* merge */
	origu= nu1->pntsu;
	nu1->pntsu+= nu2->pntsu;
	if(nu1->orderu<3) nu1->orderu++;
	if(nu1->orderv<3) nu1->orderv++;
	temp= nu1->bp;
	nu1->bp= MEM_mallocN(nu1->pntsu*nu1->pntsv*sizeof(BPoint), "mergeBP");
	
	bp= nu1->bp;
	bp1= temp;
	
	for(v=0; v<nu1->pntsv; v++) {
		
		/* switch direction? */
		if(len1<len2) bp2= nu2->bp + v*nu2->pntsu;
		else bp2= nu2->bp + (nu1->pntsv-v-1)*nu2->pntsu;

		for(u=0; u<nu1->pntsu; u++, bp++) {
			if(u<origu) {
				*bp= *bp1; bp1++;
				select_bpoint(bp, SELECT, 1, HIDDEN);
			}
			else {
				*bp= *bp2; bp2++;
			}
		}
	}

	if((nu1->type & 7)==CU_NURBS) {
		/* merge knots */
		makeknots(nu1, 1);
	
		/* make knots, for merged curved for example */
		makeknots(nu1, 2);
	}
	
	MEM_freeN(temp);
	BLI_remlink(editnurb, nu2);
	freeNurb(nu2);
}

static int merge_nurb(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	NurbSort *nus1, *nus2;
	int ok= 1;
	
	make_selection_list_nurb(editnurb);
	
	if(nsortbase.first == nsortbase.last) {
		BLI_freelistN(&nsortbase);
		BKE_report(op->reports, RPT_ERROR, "Too few selections to merge.");
		return OPERATOR_CANCELLED;
	}
	
	nus1= nsortbase.first;
	nus2= nus1->next;

	/* resolution match, to avoid uv rotations */
	if(nus1->nu->pntsv==1) {
		if(nus1->nu->pntsu==nus2->nu->pntsu || nus1->nu->pntsu==nus2->nu->pntsv);
		else ok= 0;
	}
	else if(nus2->nu->pntsv==1) {
		if(nus2->nu->pntsu==nus1->nu->pntsu || nus2->nu->pntsu==nus1->nu->pntsv);
		else ok= 0;
	}
	else if( nus1->nu->pntsu==nus2->nu->pntsu || nus1->nu->pntsv==nus2->nu->pntsv);
	else if( nus1->nu->pntsu==nus2->nu->pntsv || nus1->nu->pntsv==nus2->nu->pntsu);
	else {
		ok= 0;
	}
	
	if(ok==0) {
		BKE_report(op->reports, RPT_ERROR, "Resolution doesn't match");
		BLI_freelistN(&nsortbase);
		return OPERATOR_CANCELLED;
	}
	
	while(nus2) {
		merge_2_nurb(op, editnurb, nus1->nu, nus2->nu);
		nus2= nus2->next;
	}
	
	BLI_freelistN(&nsortbase);
	
	set_actNurb(obedit, NULL);

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);
	
	return OPERATOR_FINISHED;
}

static int make_segment_exec(bContext *C, wmOperator *op)
{
	/* joins 2 curves */
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu, *nu1=0, *nu2=0;
	BezTriple *bezt;
	BPoint *bp;
	float *fp, offset;
	int a;

	/* first decide if this is a surface merge! */
	if(obedit->type==OB_SURF) nu= editnurb->first;
	else nu= NULL;
	
	while(nu) {
		if( isNurbsel(nu) ) {
		
			if(nu->pntsu>1 && nu->pntsv>1) break;
			if(isNurbsel_count(nu)>1) break;
			if(isNurbsel_count(nu)==1) {
				/* only 1 selected, not first or last, a little complex, but intuitive */
				if(nu->pntsv==1) {
					if( (nu->bp->f1 & SELECT) || ((nu->bp+nu->pntsu-1)->f1 & SELECT));
					else break;
				}
			}
		}
		nu= nu->next;
	}

	if(nu)
		return merge_nurb(C, op);
	
	/* find both nurbs and points, nu1 will be put behind nu2 */
	for(nu= editnurb->first; nu; nu= nu->next) {
		if((nu->flagu & CU_CYCLIC)==0) {    /* not cyclic */
			if( (nu->type & 7)==CU_BEZIER ) {
				bezt= nu->bezt;
				if(nu1==0) {
					if( BEZSELECTED_HIDDENHANDLES(bezt) ) nu1= nu;
					else {
						bezt= bezt+(nu->pntsu-1);
						if( BEZSELECTED_HIDDENHANDLES(bezt) ) {
							nu1= nu;
							switchdirectionNurb(nu);
						}
					}
				}
				else if(nu2==0) {
					if( BEZSELECTED_HIDDENHANDLES(bezt) ) {
						nu2= nu;
						switchdirectionNurb(nu);
					}
					else {
						bezt= bezt+(nu->pntsu-1);
						if( BEZSELECTED_HIDDENHANDLES(bezt) ) {
							nu2= nu;
						}
					}
				}
				else break;
			}
			else if(nu->pntsv==1) {
				bp= nu->bp;
				if(nu1==0) {
					if( bp->f1 & SELECT) nu1= nu;
					else {
						bp= bp+(nu->pntsu-1);
						if( bp->f1 & SELECT ) {
							nu1= nu;
							switchdirectionNurb(nu);
						}
					}
				}
				else if(nu2==0) {
					if( bp->f1 & SELECT ) {
						nu2= nu;
						switchdirectionNurb(nu);
					}
					else {
						bp= bp+(nu->pntsu-1);
						if( bp->f1 & SELECT ) {
							nu2= nu;
						}
					}
				}
				else break;
			}
		}
	}

	if((nu1 && nu2) && (nu1!=nu2)) {
		if( nu1->type==nu2->type) {
			if((nu1->type & 7)==CU_BEZIER) {
				bezt =
					(BezTriple*)MEM_mallocN((nu1->pntsu+nu2->pntsu) * sizeof(BezTriple), "addsegmentN");
				memcpy(bezt, nu2->bezt, nu2->pntsu*sizeof(BezTriple));
				memcpy(bezt+nu2->pntsu, nu1->bezt, nu1->pntsu*sizeof(BezTriple));
				MEM_freeN(nu1->bezt);
				nu1->bezt= bezt;
				nu1->pntsu+= nu2->pntsu;
				BLI_remlink(editnurb, nu2);
				freeNurb(nu2); nu2= NULL;
				calchandlesNurb(nu1);
			}
			else {
				bp =
					(BPoint*)MEM_mallocN((nu1->pntsu+nu2->pntsu) * sizeof(BPoint), "addsegmentN2");
				memcpy(bp, nu2->bp, nu2->pntsu*sizeof(BPoint) );
				memcpy(bp+nu2->pntsu, nu1->bp, nu1->pntsu*sizeof(BPoint));
				MEM_freeN(nu1->bp);
				nu1->bp= bp;

				a= nu1->pntsu+nu1->orderu;

				nu1->pntsu+= nu2->pntsu;
				BLI_remlink(editnurb, nu2);

				/* now join the knots */
				if((nu1->type & 7)==CU_NURBS) {
					if(nu1->knotsu==NULL) {
						makeknots(nu1, 1);
					}
					else {
						fp= MEM_mallocN(sizeof(float)*KNOTSU(nu1), "addsegment3");
						memcpy(fp, nu1->knotsu, sizeof(float)*a);
						MEM_freeN(nu1->knotsu);
						nu1->knotsu= fp;
						
						
						offset= nu1->knotsu[a-1] +1.0;
						fp= nu1->knotsu+a;
						for(a=0; a<nu2->pntsu; a++, fp++) {
							if(nu2->knotsu) 
								*fp= offset+nu2->knotsu[a+1];
							else 
								*fp = offset;
						}
					}
				}
				freeNurb(nu2); nu2= NULL;
			}
		}
		
		set_actNurb(obedit, NULL);	/* for selected */

		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
		DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);	

		return OPERATOR_FINISHED;
	}
	else {
		BKE_report(op->reports, RPT_ERROR, "Can't make segment");
		return OPERATOR_CANCELLED;
	}
}

void CURVE_OT_make_segment(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Make Segment";
	ot->idname= "CURVE_OT_make_segment";
	
	/* api callbacks */
	ot->exec= make_segment_exec;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/***************** pick select from 3d view **********************/

void mouse_nurb(bContext *C, short mval[2], int extend)
{
	Object *obedit= CTX_data_edit_object(C); 
	ListBase *editnurb= curve_get_editcurve(obedit);
	Curve *cu= obedit->data;
	ViewContext vc;
	Nurb *nu;
	BezTriple *bezt=0;
	BPoint *bp=0;
	int location[2];
	short hand;
	
	view3d_set_viewcontext(C, &vc);
	
	location[0]= mval[0];
	location[1]= mval[1];
	hand= findnearestNurbvert(&vc, 1, location, &nu, &bezt, &bp);

	if(bezt || bp) {
		if(extend==0) {
		
			setflagsNurb(editnurb, 0);

			if(bezt) {

				if(hand==1) select_beztriple(bezt, SELECT, 1, HIDDEN);
				else if(hand==0) bezt->f1|= SELECT;
				else bezt->f3|= SELECT;
			}
			else {
				cu->lastselbp= bp;
				select_bpoint(bp, SELECT, 1, HIDDEN);
			}

		}
		else {
			if(bezt) {
				if(hand==1) {
					if(bezt->f2 & SELECT) select_beztriple(bezt, DESELECT, 1, HIDDEN);
					else select_beztriple(bezt, SELECT, 1, HIDDEN);
				} else if(hand==0) {
					bezt->f1 ^= SELECT;
				} else {
					bezt->f3 ^= SELECT;
				}
			}
			else {
				if(bp->f1 & SELECT) select_bpoint(bp, DESELECT, 1, HIDDEN);
				else {
					select_bpoint(bp, SELECT, 1, HIDDEN);
					cu->lastselbp= bp;
				}
			}

		}

	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
	
	if(nu!=get_actNurb(obedit))
		set_actNurb(obedit, nu);
}

/******************** spin operator ***********************/

/* from what I can gather, the mode==0 magic number spins and bridges the nurbs based on the 
 * orientation of the global 3d view (yuck yuck!) mode==1 does the same, but doesn't bridge up
 * up the new geometry, mode==2 now does the same as 0, but aligned to world axes, not the view.
*/
static int spin_nurb(bContext *C, Scene *scene, Object *obedit, float *dvec, short mode)
{
	ListBase *editnurb= curve_get_editcurve(obedit);
	View3D *v3d= CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Nurb *nu;
	float *curs, si,phi,n[3],q[4],cmat[3][3],tmat[3][3],imat[3][3];
	float cent[3],bmat[3][3], rotmat[3][3], scalemat1[3][3], scalemat2[3][3];
	float persmat[3][3], persinv[3][3];
	short a,ok, changed= 0;
	
	if(mode != 2 && rv3d) Mat3CpyMat4(persmat, rv3d->viewmat);
	else Mat3One(persmat);
	Mat3Inv(persinv, persmat);

	/* imat and center and size */
	Mat3CpyMat4(bmat, obedit->obmat);
	Mat3Inv(imat, bmat);

	if(v3d) {
		curs= give_cursor(scene, v3d);
		VECCOPY(cent, curs);
	}
	else
		cent[0]= cent[1]= cent[2]= 0.0f;

	VecSubf(cent, cent, obedit->obmat[3]);
	Mat3MulVecfl(imat,cent);

	if(dvec || mode==2 || !rv3d) {
		n[0]=n[1]= 0.0;
		n[2]= 1.0;
	} else {
		n[0]= rv3d->viewinv[2][0];
		n[1]= rv3d->viewinv[2][1];
		n[2]= rv3d->viewinv[2][2];
		Normalize(n);
	}

	phi= M_PI/8.0;
	q[0]= cos(phi);
	si= sin(phi);
	q[1]= n[0]*si;
	q[2]= n[1]*si;
	q[3]= n[2]*si;
	QuatToMat3(q, cmat);
	Mat3MulMat3(tmat, cmat, bmat);
	Mat3MulMat3(rotmat, imat, tmat);

	Mat3One(scalemat1);
	scalemat1[0][0]= sqrt(2.0);
	scalemat1[1][1]= sqrt(2.0);

	Mat3MulMat3(tmat,persmat,bmat);
	Mat3MulMat3(cmat,scalemat1,tmat);
	Mat3MulMat3(tmat,persinv,cmat);
	Mat3MulMat3(scalemat1,imat,tmat);

	Mat3One(scalemat2);
	scalemat2[0][0]/= sqrt(2.0);
	scalemat2[1][1]/= sqrt(2.0);

	Mat3MulMat3(tmat,persmat,bmat);
	Mat3MulMat3(cmat,scalemat2,tmat);
	Mat3MulMat3(tmat,persinv,cmat);
	Mat3MulMat3(scalemat2,imat,tmat);

	ok= 1;

	for(a=0;a<7;a++) {
		if(mode==0 || mode==2) ok= extrudeflagNurb(editnurb, 1);
		else adduplicateflagNurb(obedit, 1);

		if(ok==0)
			return changed;

		changed= 1;

		rotateflagNurb(editnurb, 1,cent,rotmat);

		if(mode==0 || mode==2) {
			if( (a & 1)==0 ) {
				rotateflagNurb(editnurb, 1,cent,scalemat1);
				weightflagNurb(editnurb, 1, 0.25*sqrt(2.0), 1);
			}
			else {
				rotateflagNurb(editnurb, 1,cent,scalemat2);
				weightflagNurb(editnurb, 1, 4.0/sqrt(2.0), 1);
			}
		}
		if(dvec) {
			Mat3MulVecfl(bmat,dvec);
			translateflagNurb(editnurb, 1,dvec);
		}
	}

	if(ok) {
		for(nu= editnurb->first; nu; nu= nu->next) {
			if(isNurbsel(nu)) {
				nu->orderv= 4;
				nu->flagv |= CU_CYCLIC;
				makeknots(nu, 2);
			}
		}
	}

	return changed;
}

static int spin_exec(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);

	if(!spin_nurb(C, scene, obedit, 0, 0)) {
		BKE_report(op->reports, RPT_ERROR, "Can't spin");
		return OPERATOR_CANCELLED;
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_spin(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Spin";
	ot->idname= "CURVE_OT_spin";
	
	/* api callbacks */
	ot->exec= spin_exec;
	ot->poll= ED_operator_editsurf;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/***************** add vertex operator **********************/

static int addvert_Nurb(bContext *C, short mode, float location[3])
{
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt, *newbezt = NULL;
	BPoint *bp, *newbp = NULL;
	float mat[3][3],imat[3][3], temp[3];

	Mat3CpyMat4(mat, obedit->obmat);
	Mat3Inv(imat,mat);

	findselectedNurbvert(editnurb, &nu, &bezt, &bp);
	if(bezt==0 && bp==0) return OPERATOR_CANCELLED;

	if((nu->type & 7)==CU_BEZIER) {
		/* which bezpoint? */
		if(bezt== nu->bezt) {   /* first */
			BEZ_DESEL(bezt);
			newbezt =
				(BezTriple*)MEM_callocN((nu->pntsu+1) * sizeof(BezTriple), "addvert_Nurb");
			memcpy(newbezt+1, bezt, nu->pntsu*sizeof(BezTriple));
			*newbezt= *bezt;
			BEZ_SEL(newbezt);
			newbezt->h2= newbezt->h1;
			VECCOPY(temp, bezt->vec[1]);
			MEM_freeN(nu->bezt);
			nu->bezt= newbezt;
			bezt= newbezt+1;
		}
		else if(bezt== (nu->bezt+nu->pntsu-1)) {  /* last */
			BEZ_DESEL(bezt);
			newbezt =
				(BezTriple*)MEM_callocN((nu->pntsu+1) * sizeof(BezTriple), "addvert_Nurb");
			memcpy(newbezt, nu->bezt, nu->pntsu*sizeof(BezTriple));
			*(newbezt+nu->pntsu)= *bezt;
			VECCOPY(temp, bezt->vec[1]);
			MEM_freeN(nu->bezt);
			nu->bezt= newbezt;
			newbezt+= nu->pntsu;
			BEZ_SEL(newbezt);
			newbezt->h2= newbezt->h1;
			bezt= nu->bezt+nu->pntsu-1;
		}
		else bezt= 0;

		if(bezt) {
			nu->pntsu++;
			
			if(mode=='e') {
				VECCOPY(newbezt->vec[0], bezt->vec[0]);
				VECCOPY(newbezt->vec[1], bezt->vec[1]);
				VECCOPY(newbezt->vec[2], bezt->vec[2]);
			}
			else {
				VECCOPY(newbezt->vec[1], location);
				VecSubf(newbezt->vec[1],newbezt->vec[1], obedit->obmat[3]);
				Mat3MulVecfl(imat,newbezt->vec[1]);
				VecSubf(temp, newbezt->vec[1],temp);
				VecAddf(newbezt->vec[0], bezt->vec[0],temp);
				VecAddf(newbezt->vec[2], bezt->vec[2],temp);
				calchandlesNurb(nu);
			}
		}
	}
	else if(nu->pntsv==1) {
		/* which b-point? */
		if(bp== nu->bp) {   /* first */
			bp->f1= 0;
			newbp =
				(BPoint*)MEM_callocN((nu->pntsu+1) * sizeof(BPoint), "addvert_Nurb3");
			memcpy(newbp+1, bp, nu->pntsu*sizeof(BPoint));
			*newbp= *bp;
			newbp->f1= 1;
			MEM_freeN(nu->bp);
			nu->bp= newbp;
			bp= newbp + 1;
		}
		else if(bp== (nu->bp+nu->pntsu-1)) {  /* last */
			bp->f1= 0;
			newbp =
				(BPoint*)MEM_callocN((nu->pntsu+1) * sizeof(BPoint), "addvert_Nurb4");
			memcpy(newbp, nu->bp, nu->pntsu*sizeof(BPoint));
			*(newbp+nu->pntsu)= *bp;
			MEM_freeN(nu->bp);
			nu->bp= newbp;
			newbp+= nu->pntsu;
			newbp->f1= 1;
			bp= newbp - 1;
		}
		else bp= 0;

		if(bp) {
			nu->pntsu++;
			
			makeknots(nu, 1);
			
			if(mode=='e') {
				VECCOPY(newbp->vec, bp->vec);
			}
			else {
				VECCOPY(newbp->vec, location);
				VecSubf(newbp->vec, newbp->vec, obedit->obmat[3]);
				Mat3MulVecfl(imat,newbp->vec);
				newbp->vec[3]= 1.0;
			}
		}
	}

	// XXX retopo_do_all();

	test2DNurb(nu);

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

static int add_vertex_exec(bContext *C, wmOperator *op)
{
	float location[3];

	RNA_float_get_array(op->ptr, "location", location);
	return addvert_Nurb(C, 0, location);
}

static int add_vertex_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	ViewContext vc;
	float location[3];
	short mval[2];

	if(rv3d && !RNA_property_is_set(op->ptr, "location")) {
		view3d_set_viewcontext(C, &vc);

		mval[0]= event->x - vc.ar->winrct.xmin;
		mval[1]= event->y - vc.ar->winrct.ymin;
		
		view3d_get_view_aligned_coordinate(&vc, location, mval);
		RNA_float_set_array(op->ptr, "location", location);
	}

	return add_vertex_exec(C, op);
}

void CURVE_OT_vertex_add(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Add Vertex";
	ot->idname= "CURVE_OT_vertex_add";
	
	/* api callbacks */
	ot->exec= add_vertex_exec;
	ot->invoke= add_vertex_invoke;
	ot->poll= ED_operator_editcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_float_vector(ot->srna, "location", 3, NULL, -FLT_MAX, FLT_MAX, "Location", "Location to add new vertex at.", -1e4, 1e4);
}

/***************** extrude operator **********************/

static int extrude_exec(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	
	/* first test: curve? */
	for(nu= editnurb->first; nu; nu= nu->next)
		if(nu->pntsv==1 && isNurbsel_count(nu)==1)
			break;

	if(obedit->type==OB_CURVE || nu) {
		addvert_Nurb(C, 'e', NULL);
	}
	else {
		if(extrudeflagNurb(editnurb, 1)) { /* '1'= flag */
			WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
			DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
		}
	}

	return OPERATOR_FINISHED;
}

static int extrude_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	if(extrude_exec(C, op) == OPERATOR_FINISHED) {
		RNA_int_set(op->ptr, "mode", TFM_TRANSLATION);
		WM_operator_name_call(C, "TFM_OT_transform", WM_OP_INVOKE_REGION_WIN, op->ptr);

		return OPERATOR_FINISHED;
	}

	return OPERATOR_CANCELLED;
}

void CURVE_OT_extrude(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Extrude";
	ot->idname= "CURVE_OT_extrude";
	
	/* api callbacks */
	ot->exec= extrude_exec;
	ot->invoke= extrude_invoke;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* to give to transform */
	RNA_def_int(ot->srna, "mode", TFM_TRANSLATION, 0, INT_MAX, "Mode", "", 0, INT_MAX);
}

/***************** make cyclic operator **********************/

static int toggle_cyclic_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a, direction= RNA_enum_get(op->ptr, "direction");

	for(nu= editnurb->first; nu; nu= nu->next) {
		if( nu->pntsu>1 || nu->pntsv>1) {
			if( (nu->type & 7)==CU_POLY ) {
				a= nu->pntsu;
				bp= nu->bp;
				while(a--) {
					if( bp->f1 & SELECT ) {
						nu->flagu ^= CU_CYCLIC;
						break;
					}
					bp++;
				}
			}
			else if( (nu->type & 7)==CU_BEZIER ) {
				a= nu->pntsu;
				bezt= nu->bezt;
				while(a--) {
					if( BEZSELECTED_HIDDENHANDLES(bezt) ) {
						nu->flagu ^= CU_CYCLIC;
						break;
					}
					bezt++;
				}
				calchandlesNurb(nu);
			}
			else if(nu->pntsv==1 && (nu->type & 7)==CU_NURBS) {
				if (nu->knotsu) { /* if check_valid_nurb_u fails the knotsu can be NULL */
					a= nu->pntsu;
					bp= nu->bp;
					while(a--) {
						if( bp->f1 & SELECT ) {
							nu->flagu ^= CU_CYCLIC;
							makeknots(nu, 1);	/* 1==u  type is ignored for cyclic curves */
							break;
						}
						bp++;
					}
				}
			}
			else if(nu->type==CU_NURBS) {
				a= nu->pntsu*nu->pntsv;
				bp= nu->bp;
				while(a--) {
	
					if( bp->f1 & SELECT) {
						if(direction==0 && nu->pntsu>1) {
							nu->flagu ^= CU_CYCLIC;
							makeknots(nu, 1);   /* 1==u  type is ignored for cyclic curves */
						}
						if(direction==1 && nu->pntsv>1) {
							nu->flagv ^= CU_CYCLIC;
							makeknots(nu, 2);   /* 2==v  type is ignored for cyclic curves */
						}
						break;
					}
					bp++;
				}
	
			}
		}
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

static int toggle_cyclic_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	uiPopupMenu *pup;
	uiLayout *layout;
	Nurb *nu;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if(nu->pntsu>1 || nu->pntsv>1) {
			if(nu->type==CU_NURBS) {
				pup= uiPupMenuBegin(C, "Direction", 0);
				layout= uiPupMenuLayout(pup);
				uiItemsEnumO(layout, op->type->idname, "direction");
				uiPupMenuEnd(C, pup);
				return OPERATOR_CANCELLED;
			}
		}
	}
	
	return toggle_cyclic_exec(C, op);
}

void CURVE_OT_cyclic_toggle(wmOperatorType *ot)
{
	static EnumPropertyItem direction_items[]= {
		{0, "CYCLIC_U", 0, "Cyclic U", ""},
		{1, "CYCLIC_V", 0, "Cyclic V", ""},
		{0, NULL, 0, NULL, NULL}};

	/* identifiers */
	ot->name= "Toggle Cyclic";
	ot->idname= "CURVE_OT_cyclic_toggle";
	
	/* api callbacks */
	ot->exec= toggle_cyclic_exec;
	ot->invoke= toggle_cyclic_invoke;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_enum(ot->srna, "direction", direction_items, 0, "Direction", "Direction to make surface cyclic in.");
}

/***************** select linked operator ******************/

static int select_linked_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	ViewContext vc;
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a, location[2], deselect;

	if(!rv3d)
		return OPERATOR_CANCELLED;
	
	deselect= RNA_boolean_get(op->ptr, "deselect");
	RNA_int_get_array(op->ptr, "location", location);
	
	view3d_set_viewcontext(C, &vc);
	findnearestNurbvert(&vc, 1, location, &nu, &bezt, &bp);

	if(bezt) {
		a= nu->pntsu;
		bezt= nu->bezt;
		while(a--) {
			if(deselect) select_beztriple(bezt, DESELECT, 1, VISIBLE);
			else select_beztriple(bezt, SELECT, 1, VISIBLE);
			bezt++;
		}
	}
	else if(bp) {
		a= nu->pntsu*nu->pntsv;
		bp= nu->bp;
		while(a--) {
			if(deselect) select_bpoint(bp, DESELECT, 1, VISIBLE);
			else select_bpoint(bp, SELECT, 1, VISIBLE);
			bp++;
		}
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);
	
	return OPERATOR_FINISHED;
}

static int select_linked_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	ARegion *ar= CTX_wm_region(C);
	int location[2];

	location[0]= event->x - ar->winrct.xmin;
	location[1]= event->y - ar->winrct.ymin;
	RNA_int_set_array(op->ptr, "location", location);

	return select_linked_exec(C, op);
}

void CURVE_OT_select_linked(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Linked";
	ot->idname= "CURVE_OT_select_linked";
	
	/* api callbacks */
	ot->exec= select_linked_exec;
	ot->invoke= select_linked_invoke;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_boolean(ot->srna, "deselect", 0, "Deselect", "Deselect linked control points rather than selecting them.");
	RNA_def_int_vector(ot->srna, "location", 2, NULL, 0, INT_MAX, "Location", "", 0, 16384);
}

/***************** select row operator **********************/

static int select_row_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Curve *cu= obedit->data;
	static BPoint *last=0;
	static int direction=0;
	Nurb *nu;
	BPoint *bp;
	int u = 0, v = 0, a, b, ok=0;

	if(editnurb->first==0)
		return OPERATOR_CANCELLED;
	if(cu->lastselbp==NULL)
		return OPERATOR_CANCELLED;

	/* find the correct nurb and toggle with u of v */
	for(nu= editnurb->first; nu; nu= nu->next) {
		bp= nu->bp;
		for(v=0; v<nu->pntsv; v++) {
			for(u=0; u<nu->pntsu; u++, bp++) {
				if(bp==cu->lastselbp) {
					if(bp->f1 & SELECT) {
						ok= 1;
						break;
					}
				}
			}
			if(ok) break;
		}

		if(ok) {
			if(last==cu->lastselbp) {
				direction= 1-direction;
				setflagsNurb(editnurb, 0);
			}
			last= cu->lastselbp;

			bp= nu->bp;
			for(a=0; a<nu->pntsv; a++) {
				for(b=0; b<nu->pntsu; b++, bp++) {
					if(direction) {
						if(a==v) select_bpoint(bp, SELECT, 1, VISIBLE);
					}
					else {
						if(b==u) select_bpoint(bp, SELECT, 1, VISIBLE);
					}
				}
			}

			break;
		}
	}
	
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_row(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Control Point Row";
	ot->idname= "CURVE_OT_select_row";
	
	/* api callbacks */
	ot->exec= select_row_exec;
	ot->poll= ED_operator_editsurf;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/***************** select next operator **********************/

static int select_next_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	
	select_adjacent_cp(editnurb, 1, 0, SELECT);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_next(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Next";
	ot->idname= "CURVE_OT_select_next";
	
	/* api callbacks */
	ot->exec= select_next_exec;
	ot->poll= ED_operator_editcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/***************** select previous operator **********************/

static int select_previous_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	
	select_adjacent_cp(editnurb, -1, 0, SELECT);
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_previous(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Previous";
	ot->idname= "CURVE_OT_select_previous";
	
	/* api callbacks */
	ot->exec= select_previous_exec;
	ot->poll= ED_operator_editcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/***************** select more operator **********************/

static int select_more_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BPoint *bp, *tempbp;
	int a;
	short sel= 0;
	short *selbpoints;
	
	/* note that NURBS surface is a special case because we mimic */
	/* the behaviour of "select more" of mesh tools.	      */
	/* The algorithm is designed to work in planar cases so it    */
	/* may not be optimal always (example: end of NURBS sphere)   */
	if(obedit->type==OB_SURF) {
		for(nu= editnurb->first; nu; nu= nu->next) {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			selbpoints= MEM_callocN(sizeof(short)*a-nu->pntsu, "selectlist");
			while(a > 0) {
				if((selbpoints[a]!=1) && (bp->hide==0) && (bp->f1 & SELECT)) {
					/* upper control point */
					if(a%nu->pntsu != 0) {
						tempbp= bp-1;
						if(!(tempbp->f1 & SELECT)) select_bpoint(tempbp, SELECT, 1, VISIBLE); 
					}

					/* left control point. select only if it is not selected already */
					if(a-nu->pntsu > 0) {
						sel= 0;
						tempbp= bp+nu->pntsu;
						if(!(tempbp->f1 & SELECT)) sel= select_bpoint(tempbp, SELECT, 1, VISIBLE); 
						/* make sure selected bpoint is discarded */
						if(sel == 1) selbpoints[a-nu->pntsu]= 1;
					}
					
					/* right control point */
					if(a+nu->pntsu < nu->pntsu*nu->pntsv) {
						tempbp= bp-nu->pntsu;
						if(!(tempbp->f1 & SELECT)) select_bpoint(tempbp, SELECT, 1, VISIBLE); 
					}
				
					/* lower control point. skip next bp in case selection was made */
					if(a%nu->pntsu != 1) {
						sel= 0;
						tempbp= bp+1;
						if(!(tempbp->f1 & 1)) sel= select_bpoint(tempbp, SELECT, 1, VISIBLE); 
						if(sel) {
							bp++;	
							a--;
						}
					}				
				}

				bp++;
				a--;
			}
			
			MEM_freeN(selbpoints);
		}
	}
	else {
		select_adjacent_cp(editnurb, 1, 0, SELECT);
		select_adjacent_cp(editnurb, -1, 0, SELECT);
	}
		
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_more(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select More";
	ot->idname= "CURVE_OT_select_more";
	
	/* api callbacks */
	ot->exec= select_more_exec;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/******************** select less operator *****************/

/* basic method: deselect if control point doesn't have all neighbours selected */
static int select_less_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BPoint *bp;
	BezTriple *bezt;
	int a;
	short sel= 0, lastsel= 0;
	short *selbpoints;
	
	if(obedit->type==OB_SURF) {		
		for(nu= editnurb->first; nu; nu= nu->next) {
			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			selbpoints= MEM_callocN(sizeof(short)*a, "selectlist");
			while(a--) {
				if((bp->hide==0) && (bp->f1 & SELECT)) {
					sel= 0;
									
					/* check if neighbours have been selected */	
					/* edges of surface are an exception */	
					if((a+1)%nu->pntsu==0) sel++;	
					else {
						bp--;
						if((selbpoints[a+1]==1) || ((bp->hide==0) && (bp->f1 & SELECT))) sel++;
						bp++;
					}
					
					if((a+1)%nu->pntsu==1) sel++;
					else {
						bp++;
						if((bp->hide==0) && (bp->f1 & SELECT)) sel++;
						bp--;
					}
					
					if(a+1 > nu->pntsu*nu->pntsv-nu->pntsu) sel++;
					else {
						bp-=nu->pntsu;
						if((selbpoints[a+nu->pntsu]==1) || ((bp->hide==0) && (bp->f1 & SELECT))) sel++;
						bp+=nu->pntsu;
					}
									
					if(a < nu->pntsu) sel++;
					else {
						bp+=nu->pntsu;
						if((bp->hide==0) && (bp->f1 & SELECT)) sel++;
						bp-=nu->pntsu;
					}
													
					if(sel!=4) {
						select_bpoint(bp, DESELECT, 1, VISIBLE); 
						selbpoints[a]= 1;												
					}									
				}
				else lastsel= 0;
					
				bp++;
			}
			
			MEM_freeN(selbpoints);
		}
	}
	else {
		for(nu= editnurb->first; nu; nu= nu->next) {
			lastsel=0;
			/* check what type of curve/nurb it is */
			if((nu->type & 7)==CU_BEZIER) {			
				a= nu->pntsu;
				bezt= nu->bezt;
				while(a--) {
					if((bezt->hide==0) && (bezt->f2 & SELECT)) {
						if(lastsel==1) sel= 1;
						else sel= 0;
												
						/* check if neighbours have been selected */						
						/* first and last are exceptions */					
						if(a==nu->pntsu-1) sel++; 
						else { 
							bezt--;
							if((bezt->hide==0) && (bezt->f2 & SELECT)) sel++;
							bezt++;
						}
						
						if(a==0) sel++;
						else {
							bezt++;
							if((bezt->hide==0) && (bezt->f2 & SELECT)) sel++;
							bezt--;
						}

						if(sel!=2) {
							select_beztriple(bezt, DESELECT, 1, VISIBLE);	
							lastsel= 1;
						}
						else lastsel= 0;
					}
					else lastsel= 0;
						
					bezt++;	
				}
			}
			else {
				a= nu->pntsu*nu->pntsv;
				bp= nu->bp;
				while(a--) {
					if((lastsel==0) && (bp->hide==0) && (bp->f1 & SELECT)) {
						if(lastsel!=0) sel= 1;
						else sel= 0;
						
						/* first and last are exceptions */					
						if(a==nu->pntsu*nu->pntsv-1) sel++; 
						else { 
							bp--;
							if((bp->hide==0) && (bp->f1 & SELECT)) sel++;
							bp++;
						}
						
						if(a==0) sel++;
						else {
							bp++;
							if((bp->hide==0) && (bp->f1 & SELECT)) sel++;
							bp--;
						}
											
						if(sel!=2) {
							select_bpoint(bp, DESELECT, 1, VISIBLE); 	
							lastsel= 1;						
						}				
						else lastsel= 0;					
					}
					else lastsel= 0;
						
					bp++;
				}
			}
		}
	}
	
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_less(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Less";
	ot->idname= "CURVE_OT_select_less";
	
	/* api callbacks */
	ot->exec= select_less_exec;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/********************** select random *********************/

/* this function could be moved elsewhere as it can be reused in other parts of the source needing randomized list */
/* returns list containing -1 in indices that have been left out of the list. otherwise index contains reference   */
/* to next index. basically *list contains a linked list							   */
static void generate_pickable_list(int *list, int size, int pickamount)
{
	int i, j, removable;
	
	BLI_srand( BLI_rand() ); /* random seed */

	/* generate list in form 0->1, 1->2, 2->3, ... i-2->i-1, i->0 */
	for(i=0; i<size; i++) {
		if(i == size-1) list[i]= 0;
		else list[i]= i+1;
	}

	for(i=0; i<size-pickamount; i++) { 
		removable= floor(BLI_frand()*(size-1)+0.5); /* with rounding. frand returns [0,1] */
		
		/* seek proper item as the one randomly selected might not be appropriate */
		for(j=0; j<size; j++, removable++) {
			if(list[removable] != -1) break;
			if(removable == size-1) removable= -1;
		}
				
		/* pick unwanted item out of the list */
		list[list[removable]]= -1; /* mark former last as invalid */

		if(list[removable] == size-1) list[removable]= 0;
		else list[removable]= list[removable]+1;
	}
}

static int select_random_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	float percent= RNA_float_get(op->ptr, "percent");
	int amounttoselect, amountofcps, a, i, k= 0;
	int *itemstobeselected;

	if(percent == 0.0f)
		return OPERATOR_CANCELLED;
	
	amountofcps= count_curveverts_without_handles(editnurb);
	itemstobeselected= MEM_callocN(sizeof(int) * amountofcps, "selectitems");
	amounttoselect= floor(percent * amountofcps + 0.5);
	generate_pickable_list(itemstobeselected, amountofcps, amounttoselect);
	
	/* select elements */
	for(i=1, nu= editnurb->first; nu; nu= nu->next) {	
		if((nu->type & 7)==CU_BEZIER) {
			bezt= nu->bezt;
			a= nu->pntsu;
			while(a--) {
				if(itemstobeselected[k] != -1) select_beztriple(bezt, SELECT, 1, VISIBLE);
				k++;
				bezt++;
			}
		}
		else {
			bp= nu->bp;
			a= nu->pntsu*nu->pntsv;
			while(a--) {
				if(itemstobeselected[k] != -1) select_bpoint(bp, SELECT, 1, VISIBLE); 
				k++;
				bp++;
			}
		}		
	}
		
	MEM_freeN(itemstobeselected);

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_random(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Random";
	ot->idname= "CURVE_OT_select_random";
	
	/* api callbacks */
	ot->exec= select_random_exec;
	ot->invoke= WM_operator_props_popup;
	ot->poll= ED_operator_editsurfcurve;

	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_float_percentage(ot->srna, "percent", 0.5f, 0.0f, 1.0f, "Percent", "Percentage of vertices to select randomly.", 0.0001f, 1.0f);
}

/********************** select every nth *********************/

static int select_every_nth_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	int n= RNA_int_get(op->ptr, "n");
	
	select_adjacent_cp(editnurb, n, 1, SELECT);
	select_adjacent_cp(editnurb, -n, 1, SELECT);
	
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_SELECT, obedit);

	return OPERATOR_FINISHED;
}

void CURVE_OT_select_every_nth(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Select Every Nth";
	ot->idname= "CURVE_OT_select_every_nth";
	
	/* api callbacks */
	ot->exec= select_every_nth_exec;
	ot->invoke= WM_operator_props_popup;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_int(ot->srna, "n", 2, 2, INT_MAX, "N", "Select every Nth element", 2, 25);
}

/********************** add duplicate operator *********************/

static int duplicate_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);

	adduplicateflagNurb(obedit, 1);

	return OPERATOR_FINISHED;
}

static int duplicate_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	duplicate_exec(C, op);

	RNA_int_set(op->ptr, "mode", TFM_TRANSLATION);
	WM_operator_name_call(C, "TFM_OT_transform", WM_OP_INVOKE_REGION_WIN, op->ptr);

	return OPERATOR_FINISHED;
}

void CURVE_OT_duplicate(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Duplicate";
	ot->idname= "CURVE_OT_duplicate";
	
	/* api callbacks */
	ot->exec= duplicate_exec;
	ot->invoke= duplicate_invoke;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* to give to transform */
	RNA_def_int(ot->srna, "mode", TFM_TRANSLATION, 0, INT_MAX, "Mode", "", 0, INT_MAX);
}

/********************** delete operator *********************/

static int delete_exec(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu, *next, *nu1;
	BezTriple *bezt, *bezt1, *bezt2;
	BPoint *bp, *bp1, *bp2;
	int a, cut= 0, type= RNA_enum_get(op->ptr, "type");

	if(obedit->type==OB_SURF) {
		if(type==0) deleteflagNurb(C, op, 1);
		else freeNurblist(editnurb);

		WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
		DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
	
		return OPERATOR_FINISHED;
	}

	if(type==0) {
		/* first loop, can we remove entire pieces? */
		nu= editnurb->first;
		while(nu) {
			next= nu->next;
			if( (nu->type & 7)==CU_BEZIER ) {
				bezt= nu->bezt;
				a= nu->pntsu;
				if(a) {
					while(a) {
						if( BEZSELECTED_HIDDENHANDLES(bezt) );
						else break;
						a--;
						bezt++;
					}
					if(a==0) {
						BLI_remlink(editnurb, nu);
						freeNurb(nu); nu= NULL;
					}
				}
			}
			else {
				bp= nu->bp;
				a= nu->pntsu*nu->pntsv;
				if(a) {
					while(a) {
						if(bp->f1 & SELECT);
						else break;
						a--;
						bp++;
					}
					if(a==0) {
						BLI_remlink(editnurb, nu);
						freeNurb(nu); nu= NULL;
					}
				}
			}
			
			/* Never allow the order to exceed the number of points
			- note, this is ok but changes unselected nurbs, disable for now */
			/*
			if ((nu!= NULL) && ((nu->type & 7)==CU_NURBS)) {
				clamp_nurb_order_u(nu);
			}
			*/
			nu= next;
		}
		/* 2nd loop, delete small pieces: just for curves */
		nu= editnurb->first;
		while(nu) {
			next= nu->next;
			type= 0;
			if( (nu->type & 7)==CU_BEZIER ) {
				bezt= nu->bezt;
				for(a=0;a<nu->pntsu;a++) {
					if( BEZSELECTED_HIDDENHANDLES(bezt) ) {
						memmove(bezt, bezt+1, (nu->pntsu-a-1)*sizeof(BezTriple));
						nu->pntsu--;
						a--;
						type= 1;
					}
					else bezt++;
				}
				if(type) {
					bezt1 =
						(BezTriple*)MEM_mallocN((nu->pntsu) * sizeof(BezTriple), "delNurb");
					memcpy(bezt1, nu->bezt, (nu->pntsu)*sizeof(BezTriple) );
					MEM_freeN(nu->bezt);
					nu->bezt= bezt1;
					calchandlesNurb(nu);
				}
			}
			else if(nu->pntsv==1) {
				bp= nu->bp;
				
				for(a=0;a<nu->pntsu;a++) {
					if( bp->f1 & SELECT ) {
						memmove(bp, bp+1, (nu->pntsu-a-1)*sizeof(BPoint));
						nu->pntsu--;
						a--;
						type= 1;
					}
					else {
						bp++;
					}
				}
				if(type) {
					bp1 = (BPoint*)MEM_mallocN(nu->pntsu * sizeof(BPoint), "delNurb2");
					memcpy(bp1, nu->bp, (nu->pntsu)*sizeof(BPoint) );
					MEM_freeN(nu->bp);
					nu->bp= bp1;
					
					/* Never allow the order to exceed the number of points\
					- note, this is ok but changes unselected nurbs, disable for now */
					/*
					if ((nu->type & 7)==CU_NURBS) {
						clamp_nurb_order_u(nu);
					}*/
				}
				makeknots(nu, 1);
			}
			nu= next;
		}
	}
	else if(type==1) {	/* erase segment */
		/* find the 2 selected points */
		bezt1= bezt2= 0;
		bp1= bp2= 0;
		nu= editnurb->first;
		nu1= 0;
		while(nu) {
			next= nu->next;
			if( (nu->type & 7)==CU_BEZIER ) {
				bezt= nu->bezt;
				for(a=0; a<nu->pntsu-1; a++) {
					if( BEZSELECTED_HIDDENHANDLES(bezt) ) {
						bezt1= bezt;
						bezt2= bezt+1;
						if( (bezt2->f1 & SELECT) || (bezt2->f2 & SELECT) || (bezt2->f3 & SELECT) ) ;
						else {	/* maybe do not make cyclic */
							if(a==0 && (nu->flagu & CU_CYCLIC) ) {
								bezt2= bezt+(nu->pntsu-1);
								if( (bezt2->f1 & SELECT) || (bezt2->f2 & SELECT) || (bezt2->f3 & SELECT) ) {
									nu->flagu &= ~CU_CYCLIC;
									WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
									DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
								}
							}

							return OPERATOR_FINISHED;
						}
						cut= a;
						nu1= nu;
						break;
					}
					bezt++;
				}
			}
			else if(nu->pntsv==1) {
				bp= nu->bp;
				for(a=0; a<nu->pntsu-1; a++) {
					if( bp->f1 & SELECT ) {
						bp1= bp;
						bp2= bp+1;
						if( bp2->f1 & 1 ) ;
						else {	/* maybe do not make cyclic */
							if(a==0 && (nu->flagu & CU_CYCLIC) ) {
								bp2= bp+(nu->pntsu-1);
								if( bp2->f1 & SELECT ) {
									nu->flagu &= ~CU_CYCLIC;
									WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
									DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
								}
							}

							return OPERATOR_FINISHED;
						}
						cut= a;
						nu1= nu;
						break;
					}
					bp++;
				}
			}
			if(nu1) break;

			nu= nu->next;
		}
		if(nu1) {
			if(bezt1) {
				if(nu1->pntsu==2) {	/* remove completely */
					BLI_remlink(editnurb, nu);
					freeNurb(nu); nu = NULL;
				}
				else if(nu1->flagu & CU_CYCLIC) {	/* cyclic */
					bezt =
						(BezTriple*)MEM_mallocN((cut+1) * sizeof(BezTriple), "delNurb1");
					memcpy(bezt, nu1->bezt,(cut+1)*sizeof(BezTriple));
					a= nu1->pntsu-cut-1;
					memcpy(nu1->bezt, bezt2, a*sizeof(BezTriple));
					memcpy(nu1->bezt+a, bezt, (cut+1)*sizeof(BezTriple));
					nu1->flagu &= ~CU_CYCLIC;
					MEM_freeN(bezt);
					calchandlesNurb(nu);
				}
				else {			/* add new curve */

/* seems to be an error here... but where? (a can become zero) */

					nu =
						(Nurb*)MEM_mallocN(sizeof(Nurb), "delNurb2");
					memcpy(nu, nu1, sizeof(Nurb));
					BLI_addtail(editnurb, nu);
					nu->bezt =
						(BezTriple*)MEM_mallocN((cut+1) * sizeof(BezTriple), "delNurb3");
					memcpy(nu->bezt, nu1->bezt,(cut+1)*sizeof(BezTriple));
					a= nu1->pntsu-cut-1;
					
					bezt =
						(BezTriple*)MEM_mallocN(a * sizeof(BezTriple), "delNurb4");
					memcpy(bezt, nu1->bezt+cut+1,a*sizeof(BezTriple));
					MEM_freeN(nu1->bezt);
					nu1->bezt= bezt;
					nu1->pntsu= a;
					nu->pntsu= cut+1;
					
					
					calchandlesNurb(nu);
					calchandlesNurb(nu1);
				}
			}
			else if(bp1) {
				if(nu1->pntsu==2) {	/* remove completely */
					BLI_remlink(editnurb, nu);
					freeNurb(nu); nu= NULL;
				}
				else if(nu1->flagu & CU_CYCLIC) {	/* cyclic */
					bp =
						(BPoint*)MEM_mallocN((cut+1) * sizeof(BPoint), "delNurb5");
					memcpy(bp, nu1->bp,(cut+1)*sizeof(BPoint));
					a= nu1->pntsu-cut-1;
					memcpy(nu1->bp, bp2, a*sizeof(BPoint));
					memcpy(nu1->bp+a, bp, (cut+1)*sizeof(BPoint));
					nu1->flagu &= ~CU_CYCLIC;
					MEM_freeN(bp);
				}
				else {			/* add new curve */
					nu = (Nurb*)MEM_mallocN(sizeof(Nurb), "delNurb6");
					memcpy(nu, nu1, sizeof(Nurb));
					BLI_addtail(editnurb, nu);
					nu->bp =
						(BPoint*)MEM_mallocN((cut+1) * sizeof(BPoint), "delNurb7");
					memcpy(nu->bp, nu1->bp,(cut+1)*sizeof(BPoint));
					a= nu1->pntsu-cut-1;
					bp =
						(BPoint*)MEM_mallocN(a * sizeof(BPoint), "delNurb8");
					memcpy(bp, nu1->bp+cut+1,a*sizeof(BPoint));
					MEM_freeN(nu1->bp);
					nu1->bp= bp;
					nu1->pntsu= a;
					nu->pntsu= cut+1;
				}
			}
		}
	}
	else if(type==2)
		freeNurblist(editnurb);

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(scene, obedit, OB_RECALC_DATA);
	
	return OPERATOR_FINISHED;
}

static int delete_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	Object *obedit= CTX_data_edit_object(C);
	uiPopupMenu *pup;
	uiLayout *layout;

	if(obedit->type==OB_SURF) {
		pup= uiPupMenuBegin(C, "Delete", 0);
		layout= uiPupMenuLayout(pup);
		uiItemEnumO(layout, NULL, 0, op->type->idname, "type", 0);
		uiItemEnumO(layout, NULL, 0, op->type->idname, "type", 2);
		uiPupMenuEnd(C, pup);
	}
	else {
		pup= uiPupMenuBegin(C, "Delete", 0);
		layout= uiPupMenuLayout(pup);
		uiItemsEnumO(layout, op->type->idname, "type");
		uiPupMenuEnd(C, pup);
	}

	return OPERATOR_CANCELLED;
}

void CURVE_OT_delete(wmOperatorType *ot)
{
	static EnumPropertyItem type_items[] = {
		{0, "SELECTED", 0, "Selected", ""},
		{1, "SEGMENT", 0, "Segment", ""},
		{2, "ALL", 0, "All", ""},
		{0, NULL, 0, NULL, NULL}};

	/* identifiers */
	ot->name= "Delete";
	ot->idname= "CURVE_OT_delete";
	
	/* api callbacks */
	ot->exec= delete_exec;
	ot->invoke= delete_invoke;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

	/* properties */
	RNA_def_enum(ot->srna, "type", type_items, 0, "Type", "Which elements to delete.");
}

/********************** shade smooth/flat operator *********************/

static int shade_smooth_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	int clear= (strcmp(op->idname, "CURVE_OT_shade_flat") == 0);
	
	if(obedit->type != OB_CURVE)
		return OPERATOR_CANCELLED;
	
	for(nu= editnurb->first; nu; nu= nu->next) {
		if(isNurbsel(nu)) {
			if(!clear) nu->flag |= CU_SMOOTH;
			else nu->flag &= ~CU_SMOOTH;
		}
	}
	
	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_shade_smooth(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Shade Smooth";
	ot->idname= "CURVE_OT_shade_smooth";
	
	/* api callbacks */
	ot->exec= shade_smooth_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

void CURVE_OT_shade_flat(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Shade Flat";
	ot->idname= "CURVE_OT_shade_flat";
	
	/* api callbacks */
	ot->exec= shade_smooth_exec;
	ot->poll= ED_operator_editsurfcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/************** join operator, to be used externally? ****************/

int join_curve_exec(bContext *C, wmOperator *op)
{
	Scene *scene= CTX_data_scene(C);
	Object *ob= CTX_data_active_object(C);
	Curve *cu;
	Nurb *nu, *newnu;
	BezTriple *bezt;
	BPoint *bp;
	ListBase tempbase;
	float imat[4][4], cmat[4][4];
	int a;

	tempbase.first= tempbase.last= 0;
	
	/* trasnform all selected curves inverse in obact */
	Mat4Invert(imat, ob->obmat);
	
	CTX_DATA_BEGIN(C, Base*, base, selected_editable_bases) {
		if(base->object->type==ob->type) {
			if(base->object != ob) {
			
				cu= base->object->data;
			
				if(cu->nurb.first) {
					/* watch it: switch order here really goes wrong */
					Mat4MulMat4(cmat, base->object->obmat, imat);
					
					nu= cu->nurb.first;
					while(nu) {
						newnu= duplicateNurb(nu);
						BLI_addtail(&tempbase, newnu);
						
						if( (bezt= newnu->bezt) ) {
							a= newnu->pntsu;
							while(a--) {
								Mat4MulVecfl(cmat, bezt->vec[0]);
								Mat4MulVecfl(cmat, bezt->vec[1]);
								Mat4MulVecfl(cmat, bezt->vec[2]);
								bezt++;
							}
						}
						if( (bp= newnu->bp) ) {
							a= newnu->pntsu*nu->pntsv;
							while(a--) {
								Mat4MulVecfl(cmat, bp->vec);
								bp++;
							}
						}
						nu= nu->next;
					}
				}
			
				ED_base_object_free_and_unlink(scene, base);
			}
		}
	}
	CTX_DATA_END;
	
	cu= ob->data;
	addlisttolist(&cu->nurb, &tempbase);
	
	DAG_scene_sort(scene);	// because we removed object(s), call before editmode!
	
	ED_object_enter_editmode(C, EM_WAITCURSOR);
	ED_object_exit_editmode(C, EM_FREEDATA|EM_WAITCURSOR);

	WM_event_add_notifier(C, NC_SCENE|ND_OB_ACTIVE, scene);

	return OPERATOR_FINISHED;
}

/************ add primitive, used by object/ module ****************/

Nurb *add_nurbs_primitive(bContext *C, int type, int newname)
{
	static int xzproj= 0;	/* this function calls itself... */
	Scene *scene= CTX_data_scene(C);
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	View3D *v3d= CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Nurb *nu = NULL;
	BezTriple *bezt;
	BPoint *bp;
	float *curs, cent[3],vec[3],imat[3][3],mat[3][3];
	float fac,cmat[3][3], grid;
	int a, b, cutype, stype;
	
	cutype= type & CU_TYPE;	// poly, bezier, nurbs, etc
	stype= type & CU_PRIMITIVE;
	
	if (v3d)	grid = v3d->grid;
	else		grid = 1.0;
	
	/* imat and center and size */
	if(obedit) {
		
		Mat3CpyMat4(mat, obedit->obmat);
		if(v3d) {
			curs= give_cursor(scene, v3d);
			VECCOPY(cent, curs);
		}
		else
			cent[0]= cent[1]= cent[2]= 0.0f;

		cent[0]-= obedit->obmat[3][0];
		cent[1]-= obedit->obmat[3][1];
		cent[2]-= obedit->obmat[3][2];
		
		if(rv3d) {
			if (!(newname) || U.flag & USER_ADD_VIEWALIGNED || !rv3d)
				Mat3CpyMat4(imat, rv3d->viewmat);
			else
				Mat3One(imat);

			Mat3MulVecfl(imat, cent);
			Mat3MulMat3(cmat, imat, mat);
			Mat3Inv(imat, cmat);
		}
		else
			Mat3One(imat);

		setflagsNurb(editnurb, 0);
	}
	else
		return NULL;
	
	/* these types call this function to return a Nurb */
	if (stype!=CU_PRIM_TUBE && stype!=CU_PRIM_DONUT) {
		nu = (Nurb*)MEM_callocN(sizeof(Nurb), "addNurbprim");
		nu->type= type;
		nu->resolu= 4;
		nu->resolv= 4;
	}

	switch(stype) {
	case CU_PRIM_CURVE:	/* curve */
		nu->resolu= 12; /* set as 4 above */
		if(newname) {
			rename_id((ID *)obedit, "Curve");
			rename_id((ID *)obedit->data, "Curve");
		}
		if(cutype==CU_BEZIER) {
			nu->pntsu= 2;
			nu->bezt =
				(BezTriple*)MEM_callocN(2 * sizeof(BezTriple), "addNurbprim1");
			bezt= nu->bezt;
			bezt->h1= bezt->h2= HD_ALIGN;
			bezt->f1= bezt->f2= bezt->f3= SELECT;
			bezt->radius = 1.0;

			for(a=0;a<3;a++) {
				VECCOPY(bezt->vec[a], cent);
			}
			bezt->vec[1][0]+= -grid;
			bezt->vec[0][0]+= -1.5*grid;
			bezt->vec[0][1]+= -0.5*grid;
			bezt->vec[2][0]+= -0.5*grid;
			bezt->vec[2][1]+=  0.5*grid;
			for(a=0;a<3;a++) Mat3MulVecfl(imat, bezt->vec[a]);

			bezt++;
			bezt->h1= bezt->h2= HD_ALIGN;
			bezt->f1= bezt->f2= bezt->f3= SELECT;
			bezt->radius = bezt->weight = 1.0;

			for(a=0;a<3;a++) {
				VECCOPY(bezt->vec[a], cent);
			}
			bezt->vec[1][0]+= grid;
			for(a=0;a<3;a++) Mat3MulVecfl(imat, bezt->vec[a]);

			calchandlesNurb(nu);
		}
		else {
			
			nu->pntsu= 4;
			nu->pntsv= 1;
			nu->orderu= 4;
			nu->bp= callocstructN(BPoint, 4, "addNurbprim3");

			bp= nu->bp;
			for(a=0;a<4;a++, bp++) {
				VECCOPY(bp->vec, cent);
				bp->vec[3]= 1.0;
				bp->f1= SELECT;
				bp->radius = bp->weight = 1.0;
			}

			bp= nu->bp;
			bp->vec[0]+= -1.5*grid; 
			bp++;
			bp->vec[0]+= -grid;
			bp->vec[1]+=  grid; 
			bp++;
			bp->vec[0]+= grid;
			bp->vec[1]+= grid; 
			bp++;
			bp->vec[0]+= 1.5*grid;

			bp= nu->bp;
			for(a=0;a<4;a++, bp++) Mat3MulVecfl(imat,bp->vec);

			if(cutype==CU_NURBS) {
				nu->knotsu= 0;	/* makeknots allocates */
				makeknots(nu, 1);
			}

		}
		break;
	case CU_PRIM_PATH:	/* 5 point path */
		nu->pntsu= 5;
		nu->pntsv= 1;
		nu->orderu= 5;
		nu->flagu= 2;	/* endpoint */
		nu->resolu= 8;
		nu->bp= callocstructN(BPoint, 5, "addNurbprim3");

		bp= nu->bp;
		for(a=0;a<5;a++, bp++) {
			VECCOPY(bp->vec, cent);
			bp->vec[3]= 1.0;
			bp->f1= SELECT;
			bp->radius = bp->weight = 1.0;
		}

		bp= nu->bp;
		bp->vec[0]+= -2.0*grid; 
		bp++;
		bp->vec[0]+= -grid;
		bp++; bp++;
		bp->vec[0]+= grid;
		bp++;
		bp->vec[0]+= 2.0*grid;

		bp= nu->bp;
		for(a=0;a<5;a++, bp++) Mat3MulVecfl(imat,bp->vec);

		if(cutype==CU_NURBS) {
			nu->knotsu= 0;	/* makeknots allocates */
			makeknots(nu, 1);
		}

		break;
	case CU_PRIM_CIRCLE:	/* circle */
		nu->resolu= 12; /* set as 4 above */
		if(newname) {
			rename_id((ID *)obedit, "CurveCircle");
			rename_id((ID *)obedit->data, "CurveCircle");
		}
		if(cutype==CU_BEZIER) {
			nu->pntsu= 4;
			nu->bezt= callocstructN(BezTriple, 4, "addNurbprim1");
			nu->flagu= CU_CYCLIC;
			bezt= nu->bezt;

			for(a=0;a<3;a++) {
				VECCOPY(bezt->vec[a], cent);
			}
			bezt->h1= bezt->h2= HD_AUTO;
			bezt->f1= bezt->f2= bezt->f3= SELECT;
			bezt->vec[1][0]+= -grid;
			for(a=0;a<3;a++) Mat3MulVecfl(imat,bezt->vec[a]);
			bezt->radius = bezt->weight = 1.0;
			
			bezt++;
			for(a=0;a<3;a++) {
				VECCOPY(bezt->vec[a], cent);
			}
			bezt->h1= bezt->h2= HD_AUTO;
			bezt->f1= bezt->f2= bezt->f3= SELECT;
			bezt->vec[1][1]+= grid;
			for(a=0;a<3;a++) Mat3MulVecfl(imat,bezt->vec[a]);
			bezt->radius = bezt->weight = 1.0;

			bezt++;
			for(a=0;a<3;a++) {
				VECCOPY(bezt->vec[a], cent);
			}
			bezt->h1= bezt->h2= HD_AUTO;
			bezt->f1= bezt->f2= bezt->f3= SELECT;
			bezt->vec[1][0]+= grid;
			for(a=0;a<3;a++) Mat3MulVecfl(imat,bezt->vec[a]);
			bezt->radius = bezt->weight = 1.0;

			bezt++;
			for(a=0;a<3;a++) {
				VECCOPY(bezt->vec[a], cent);
			}
			bezt->h1= bezt->h2= HD_AUTO;
			bezt->f1= bezt->f2= bezt->f3= SELECT;
			bezt->vec[1][1]+= -grid;
			for(a=0;a<3;a++) Mat3MulVecfl(imat,bezt->vec[a]);
			bezt->radius = bezt->weight = 1.0;

			calchandlesNurb(nu);
		}
		else if( cutype==CU_NURBS ) {  /* nurb */
			nu->pntsu= 8;
			nu->pntsv= 1;
			nu->orderu= 4;
			nu->bp= callocstructN(BPoint, 8, "addNurbprim6");
			nu->flagu= CU_CYCLIC;
			bp= nu->bp;

			for(a=0; a<8; a++) {
				bp->f1= SELECT;
				VECCOPY(bp->vec, cent);

				if(xzproj==0) {
					bp->vec[0]+= nurbcircle[a][0]*grid;
					bp->vec[1]+= nurbcircle[a][1]*grid;
				}
				else {
					bp->vec[0]+= 0.25*nurbcircle[a][0]*grid-.75*grid;
					bp->vec[2]+= 0.25*nurbcircle[a][1]*grid;
				}
				if(a & 1) bp->vec[3]= 0.25*sqrt(2.0);
				else bp->vec[3]= 1.0;
				Mat3MulVecfl(imat,bp->vec);
				bp->radius = bp->weight = 1.0;
				
				bp++;
			}

			makeknots(nu, 1);
		}
		break;
	case CU_PRIM_PATCH:	/* 4x4 patch */
		if( cutype==CU_NURBS ) {  /* nurb */
			if(newname) {
				rename_id((ID *)obedit, "Surf");
				rename_id((ID *)obedit->data, "Surf");
			}

			nu->pntsu= 4;
			nu->pntsv= 4;
			nu->orderu= 4;
			nu->orderv= 4;
			nu->flag= CU_SMOOTH;
			nu->bp= callocstructN(BPoint, 4*4, "addNurbprim6");
			nu->flagu= 0;
			nu->flagv= 0;
			bp= nu->bp;

			for(a=0; a<4; a++) {
				for(b=0; b<4; b++) {
					VECCOPY(bp->vec, cent);
					bp->f1= SELECT;
					fac= (float)a -1.5;
					bp->vec[0]+= fac*grid;
					fac= (float)b -1.5;
					bp->vec[1]+= fac*grid;
					if(a==1 || a==2) if(b==1 || b==2) {
						bp->vec[2]+= grid;
					}
					Mat3MulVecfl(imat,bp->vec);
					bp->vec[3]= 1.0;
					bp++;
				}
			}

			makeknots(nu, 1);
			makeknots(nu, 2);
		}
		break;
	case CU_PRIM_TUBE:	/* tube */
		if( cutype==CU_NURBS ) {
			if(newname) {
				rename_id((ID *)obedit, "SurfTube");
				rename_id((ID *)obedit->data, "SurfTube");
			}

			nu= add_nurbs_primitive(C, CU_NURBS|CU_PRIM_CIRCLE, 0);  /* circle */
			nu->resolu= 4;
			nu->flag= CU_SMOOTH;
			BLI_addtail(editnurb, nu); /* temporal for extrude and translate */
			vec[0]=vec[1]= 0.0;
			vec[2]= -grid;
			Mat3MulVecfl(imat, vec);
			translateflagNurb(editnurb, 1, vec);
			extrudeflagNurb(editnurb, 1);
			vec[0]= -2*vec[0]; 
			vec[1]= -2*vec[1]; 
			vec[2]= -2*vec[2];
			translateflagNurb(editnurb, 1, vec);

			BLI_remlink(editnurb, nu);

			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a-- >0) {
				bp->f1 |= SELECT;
				bp++;
			}
		}
		break;
	case CU_PRIM_SPHERE:	/* sphere */
		if( cutype==CU_NURBS ) {
			if(newname) {
				rename_id((ID *)obedit, "SurfSphere");
				rename_id((ID *)obedit->data, "SurfSphere");
			}

			nu->pntsu= 5;
			nu->pntsv= 1;
			nu->orderu= 3;
			nu->resolu= 4;
			nu->resolv= 4;
			nu->flag= CU_SMOOTH;
			nu->bp= callocstructN(BPoint, 5, "addNurbprim6");
			nu->flagu= 0;
			bp= nu->bp;

			for(a=0; a<5; a++) {
				bp->f1= SELECT;
				VECCOPY(bp->vec, cent);
				bp->vec[0]+= nurbcircle[a][0]*grid;
				bp->vec[2]+= nurbcircle[a][1]*grid;
				if(a & 1) bp->vec[3]= 0.5*sqrt(2.0);
				else bp->vec[3]= 1.0;
				Mat3MulVecfl(imat,bp->vec);
				bp++;
			}
			nu->flagu= 4;
			makeknots(nu, 1);

			BLI_addtail(editnurb, nu); /* temporal for spin */
			if(newname && (U.flag & USER_ADD_VIEWALIGNED) == 0)
				spin_nurb(C, scene, obedit, 0, 2);
			else
				spin_nurb(C, scene, obedit, 0, 0);

			makeknots(nu, 2);

			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a-- >0) {
				bp->f1 |= SELECT;
				bp++;
			}
			BLI_remlink(editnurb, nu);
		}
		break;
	case CU_PRIM_DONUT:	/* donut */
		if( cutype==CU_NURBS ) {
			if(newname) {
				rename_id((ID *)obedit, "SurfDonut");
				rename_id((ID *)obedit->data, "SurfDonut");
			}

			xzproj= 1;
			nu= add_nurbs_primitive(C, CU_NURBS|CU_PRIM_CIRCLE, 0);  /* circle */
			xzproj= 0;
			nu->resolu= 4;
			nu->resolv= 4;
			nu->flag= CU_SMOOTH;
			BLI_addtail(editnurb, nu); /* temporal for extrude and translate */
			if(newname && (U.flag & USER_ADD_VIEWALIGNED) == 0)
				spin_nurb(C, scene, obedit, 0, 2);
			else
				spin_nurb(C, scene, obedit, 0, 0);

			BLI_remlink(editnurb, nu);

			a= nu->pntsu*nu->pntsv;
			bp= nu->bp;
			while(a-- >0) {
				bp->f1 |= SELECT;
				bp++;
			}

		}
		break;
	}
	
	/* always do: */
	nu->flag= CU_SMOOTH;
	
	test2DNurb(nu);
	
	return nu;
}

/***************** clear tilt operator ********************/

static int clear_tilt_exec(bContext *C, wmOperator *op)
{
	Object *obedit= CTX_data_edit_object(C);
	ListBase *editnurb= curve_get_editcurve(obedit);
	Nurb *nu;
	BezTriple *bezt;
	BPoint *bp;
	int a;

	for(nu= editnurb->first; nu; nu= nu->next) {
		if( nu->bezt ) {
			bezt= nu->bezt;
			a= nu->pntsu;
			while(a--) {
				if(BEZSELECTED_HIDDENHANDLES(bezt)) bezt->alfa= 0.0;
				bezt++;
			}
		}
		else if(nu->bp) {
			bp= nu->bp;
			a= nu->pntsu*nu->pntsv;
			while(a--) {
				if(bp->f1 & SELECT) bp->alfa= 0.0;
				bp++;
			}
		}
	}

	WM_event_add_notifier(C, NC_OBJECT|ND_GEOM_DATA, obedit);
	DAG_object_flush_update(CTX_data_scene(C), obedit, OB_RECALC_DATA);

	return OPERATOR_FINISHED;
}

void CURVE_OT_tilt_clear(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Clear Tilt";
	ot->idname= "CURVE_OT_tilt_clear";
	
	/* api callbacks */
	ot->exec= clear_tilt_exec;
	ot->poll= ED_operator_editcurve;
	
	/* flags */
	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/****************** undo for curves ****************/

static void undoCurve_to_editCurve(void *lbu, void *lbe)
{
	ListBase *lb= lbu;
	ListBase *editnurb= lbe;
	Nurb *nu, *newnu;
	
	freeNurblist(editnurb);

	/* copy  */
	for(nu= lb->first; nu; nu= nu->next) {
		newnu= duplicateNurb(nu);
		BLI_addtail(editnurb, newnu);
	}
}

static void *editCurve_to_undoCurve(void *lbe)
{
	ListBase *editnurb= lbe;
	ListBase *lb;
	Nurb *nu, *newnu;

	lb= MEM_callocN(sizeof(ListBase), "listbase undo");
	
	/* copy  */
	for(nu= editnurb->first; nu; nu= nu->next) {
		newnu= duplicateNurb(nu);
		BLI_addtail(lb, newnu);
	}
	return lb;
}

static void free_undoCurve(void *lbv)
{
	ListBase *lb= lbv;
	
	freeNurblist(lb);
	MEM_freeN(lb);
}

static void *get_data(bContext *C)
{
	Object *obedit= CTX_data_edit_object(C);
	return curve_get_editcurve(obedit);
}

/* and this is all the undo system needs to know */
void undo_push_curve(bContext *C, char *name)
{
	undo_editmode_push(C, name, get_data, free_undoCurve, undoCurve_to_editCurve, editCurve_to_undoCurve, NULL);
}

/***************** XXX old cruft ********************/

void default_curve_ipo(Scene *scene, Curve *cu)
{
#if 0 // XXX old animation system
	IpoCurve *icu;
	BezTriple *bezt;
	
	if(cu->ipo) return;
	
	cu->ipo= add_ipo(scene, "CurveIpo", ID_CU);
	
	icu= MEM_callocN(sizeof(IpoCurve), "ipocurve");
			
	icu->blocktype= ID_CU;
	icu->adrcode= CU_SPEED;
	icu->flag= IPO_VISIBLE|IPO_SELECT|IPO_AUTO_HORIZ;
	set_icu_vars(icu);
	
	BLI_addtail( &(cu->ipo->curve), icu);
	
	icu->bezt= bezt= MEM_callocN(2*sizeof(BezTriple), "defaultipo");
	icu->totvert= 2;
	
	bezt->hide= IPO_BEZ;
	bezt->f1=bezt->f2= bezt->f3= SELECT;
	bezt->h1= bezt->h2= HD_AUTO;
	bezt++;
	bezt->vec[1][0]= 100.0;
	bezt->vec[1][1]= 1.0;
	bezt->hide= IPO_BEZ;
	bezt->f1=bezt->f2= bezt->f3= SELECT;
	bezt->h1= bezt->h2= HD_AUTO;
	
	calchandles_ipocurve(icu);
#endif // XXX old animation system
}