/*
 * $Id$
 *
 * ***** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 *
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/editors/space_view3d/view3d_edit.c
 *  \ingroup spview3d
 */


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

#include "DNA_armature_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_camera_types.h"
#include "DNA_lamp_types.h"

#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_rand.h"
#include "BLI_utildefines.h"

#include "BKE_context.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_object.h"
#include "BKE_paint.h"
#include "BKE_report.h"
#include "BKE_scene.h"
#include "BKE_screen.h"
#include "BKE_depsgraph.h" /* for ED_view3d_camera_lock_sync */


#include "BIF_gl.h"
#include "BIF_glutil.h"

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

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

#include "ED_particle.h"
#include "ED_screen.h"
#include "ED_transform.h"
#include "ED_mesh.h"
#include "ED_view3d.h"


#include "PIL_time.h" /* smoothview */

#include "view3d_intern.h"	// own include

/* ********************** view3d_edit: view manipulations ********************* */

int ED_view3d_camera_lock_check(View3D *v3d, RegionView3D *rv3d)
{
	return ((v3d->camera) &&
	        (v3d->camera->id.lib == NULL) &&
	        (v3d->flag2 & V3D_LOCK_CAMERA) &&
	        (rv3d->persp==RV3D_CAMOB));
}

void ED_view3d_camera_lock_init(View3D *v3d, RegionView3D *rv3d)
{
	if(ED_view3d_camera_lock_check(v3d, rv3d)) {
		ED_view3d_from_object(v3d->camera, rv3d->ofs, rv3d->viewquat, &rv3d->dist, NULL);
	}
}

/* return TRUE if the camera is moved */
int ED_view3d_camera_lock_sync(View3D *v3d, RegionView3D *rv3d)
{
	if(ED_view3d_camera_lock_check(v3d, rv3d)) {
		Object *root_parent;

		if((U.uiflag & USER_CAM_LOCK_NO_PARENT)==0 && (root_parent= v3d->camera->parent)) {
			Object *ob_update;
			float view_mat[4][4];
			float diff_mat[4][4];
			float parent_mat[4][4];

			while(root_parent->parent) {
				root_parent= root_parent->parent;
			}

			ED_view3d_to_m4(view_mat, rv3d->ofs, rv3d->viewquat, rv3d->dist);

			invert_m4_m4(v3d->camera->imat, v3d->camera->obmat);
			mul_m4_m4m4(diff_mat, v3d->camera->imat, view_mat);

			mul_m4_m4m4(parent_mat, root_parent->obmat, diff_mat);
			object_apply_mat4(root_parent, parent_mat, TRUE, FALSE);

			ob_update= v3d->camera;
			while(ob_update) {
				DAG_id_tag_update(&ob_update->id, OB_RECALC_OB);
				WM_main_add_notifier(NC_OBJECT|ND_TRANSFORM, ob_update);
				ob_update= ob_update->parent;
			}
		}
		else {
			ED_view3d_to_object(v3d->camera, rv3d->ofs, rv3d->viewquat, rv3d->dist);
			DAG_id_tag_update(&v3d->camera->id, OB_RECALC_OB);
			WM_main_add_notifier(NC_OBJECT|ND_TRANSFORM, v3d->camera);
		}

		return TRUE;
	}
	else {
		return FALSE;
	}
}


/* ********************* box view support ***************** */

static void view3d_boxview_clip(ScrArea *sa)
{
	ARegion *ar;
	BoundBox *bb = MEM_callocN(sizeof(BoundBox), "clipbb");
	float clip[6][4];
	float x1= 0.0f, y1= 0.0f, z1= 0.0f, ofs[3] = {0.0f, 0.0f, 0.0f};
	int val;

	/* create bounding box */
	for(ar= sa->regionbase.first; ar; ar= ar->next) {
		if(ar->regiontype==RGN_TYPE_WINDOW) {
			RegionView3D *rv3d= ar->regiondata;

			if(rv3d->viewlock & RV3D_BOXCLIP) {
				if(ELEM(rv3d->view, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM)) {
					if(ar->winx>ar->winy) x1= rv3d->dist;
					else x1= ar->winx*rv3d->dist/ar->winy;

					if(ar->winx>ar->winy) y1= ar->winy*rv3d->dist/ar->winx;
					else y1= rv3d->dist;
					copy_v2_v2(ofs, rv3d->ofs);
				}
				else if(ELEM(rv3d->view, RV3D_VIEW_FRONT, RV3D_VIEW_BACK)) {
					ofs[2]= rv3d->ofs[2];

					if(ar->winx>ar->winy) z1= ar->winy*rv3d->dist/ar->winx;
					else z1= rv3d->dist;
				}
			}
		}
	}

	for(val=0; val<8; val++) {
		if(ELEM4(val, 0, 3, 4, 7))
			bb->vec[val][0]= -x1 - ofs[0];
		else
			bb->vec[val][0]=  x1 - ofs[0];

		if(ELEM4(val, 0, 1, 4, 5))
			bb->vec[val][1]= -y1 - ofs[1];
		else
			bb->vec[val][1]=  y1 - ofs[1];

		if(val > 3)
			bb->vec[val][2]= -z1 - ofs[2];
		else
			bb->vec[val][2]=  z1 - ofs[2];
	}

	/* normals for plane equations */
	normal_tri_v3( clip[0],bb->vec[0], bb->vec[1], bb->vec[4]);
	normal_tri_v3( clip[1],bb->vec[1], bb->vec[2], bb->vec[5]);
	normal_tri_v3( clip[2],bb->vec[2], bb->vec[3], bb->vec[6]);
	normal_tri_v3( clip[3],bb->vec[3], bb->vec[0], bb->vec[7]);
	normal_tri_v3( clip[4],bb->vec[4], bb->vec[5], bb->vec[6]);
	normal_tri_v3( clip[5],bb->vec[0], bb->vec[2], bb->vec[1]);

	/* then plane equations */
	for(val=0; val<5; val++) {
		clip[val][3]= - clip[val][0]*bb->vec[val][0] - clip[val][1]*bb->vec[val][1] - clip[val][2]*bb->vec[val][2];
	}
	clip[5][3]= - clip[5][0]*bb->vec[0][0] - clip[5][1]*bb->vec[0][1] - clip[5][2]*bb->vec[0][2];

	/* create bounding box */
	for(ar= sa->regionbase.first; ar; ar= ar->next) {
		if(ar->regiontype==RGN_TYPE_WINDOW) {
			RegionView3D *rv3d= ar->regiondata;

			if(rv3d->viewlock & RV3D_BOXCLIP) {
				rv3d->rflag |= RV3D_CLIPPING;
				memcpy(rv3d->clip, clip, sizeof(clip));
				if(rv3d->clipbb) MEM_freeN(rv3d->clipbb);
				rv3d->clipbb= MEM_dupallocN(bb);
			}
		}
	}
	MEM_freeN(bb);
}

/* sync center/zoom view of region to others, for view transforms */
static void view3d_boxview_sync(ScrArea *sa, ARegion *ar)
{
	ARegion *artest;
	RegionView3D *rv3d= ar->regiondata;
	short clip= 0;

	for(artest= sa->regionbase.first; artest; artest= artest->next) {
		if(artest!=ar && artest->regiontype==RGN_TYPE_WINDOW) {
			RegionView3D *rv3dtest= artest->regiondata;

			if(rv3dtest->viewlock) {
				rv3dtest->dist= rv3d->dist;

				if( ELEM(rv3d->view, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM) ) {
					if( ELEM(rv3dtest->view, RV3D_VIEW_FRONT, RV3D_VIEW_BACK))
						rv3dtest->ofs[0]= rv3d->ofs[0];
					else if( ELEM(rv3dtest->view, RV3D_VIEW_RIGHT, RV3D_VIEW_LEFT))
						rv3dtest->ofs[1]= rv3d->ofs[1];
				}
				else if( ELEM(rv3d->view, RV3D_VIEW_FRONT, RV3D_VIEW_BACK) ) {
					if( ELEM(rv3dtest->view, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM))
						rv3dtest->ofs[0]= rv3d->ofs[0];
					else if( ELEM(rv3dtest->view, RV3D_VIEW_RIGHT, RV3D_VIEW_LEFT))
						rv3dtest->ofs[2]= rv3d->ofs[2];
				}
				else if( ELEM(rv3d->view, RV3D_VIEW_RIGHT, RV3D_VIEW_LEFT) ) {
					if( ELEM(rv3dtest->view, RV3D_VIEW_TOP, RV3D_VIEW_BOTTOM))
						rv3dtest->ofs[1]= rv3d->ofs[1];
					if( ELEM(rv3dtest->view, RV3D_VIEW_FRONT, RV3D_VIEW_BACK))
						rv3dtest->ofs[2]= rv3d->ofs[2];
				}

				clip |= rv3dtest->viewlock & RV3D_BOXCLIP;

				ED_region_tag_redraw(artest);
			}
		}
	}

	if(clip) {
		view3d_boxview_clip(sa);
	}
}

/* for home, center etc */
void view3d_boxview_copy(ScrArea *sa, ARegion *ar)
{
	ARegion *artest;
	RegionView3D *rv3d= ar->regiondata;
	short clip= 0;

	for(artest= sa->regionbase.first; artest; artest= artest->next) {
		if(artest!=ar && artest->regiontype==RGN_TYPE_WINDOW) {
			RegionView3D *rv3dtest= artest->regiondata;

			if(rv3dtest->viewlock) {
				rv3dtest->dist= rv3d->dist;
				copy_v3_v3(rv3dtest->ofs, rv3d->ofs);
				ED_region_tag_redraw(artest);

				clip |= rv3dtest->viewlock & RV3D_BOXCLIP;
			}
		}
	}

	if(clip) {
		view3d_boxview_clip(sa);
	}
}

/* 'clip' is used to know if our clip setting has changed */
void ED_view3d_quadview_update(ScrArea *sa, ARegion *ar, short do_clip)
{
	ARegion *arsync= NULL;
	RegionView3D *rv3d= ar->regiondata;
	short viewlock;
	/* this function copies flags from the first of the 3 other quadview
	   regions to the 2 other, so it assumes this is the region whose
	   properties are always being edited, weak */
	viewlock= rv3d->viewlock;

	if((viewlock & RV3D_LOCKED)==0)
		viewlock= 0;
	else if((viewlock & RV3D_BOXVIEW)==0) {
		viewlock &= ~RV3D_BOXCLIP;
		do_clip= TRUE;
	}

	for(; ar; ar= ar->prev) {
		if(ar->alignment==RGN_ALIGN_QSPLIT) {
			rv3d= ar->regiondata;
			rv3d->viewlock= viewlock;

			if(do_clip && (viewlock & RV3D_BOXCLIP)==0) {
				rv3d->rflag &= ~RV3D_BOXCLIP;
			}

			/* use arsync so we sync with one of the aligned views below
			 * else the view jumps on changing view settings like 'clip'
			 * since it copies from the perspective view */
			arsync= ar;
		}
	}

	if(rv3d->viewlock & RV3D_BOXVIEW) {
		view3d_boxview_copy(sa, arsync ? arsync : sa->regionbase.last);
	}

	ED_area_tag_redraw(sa);
}

/* ************************** init for view ops **********************************/

typedef struct ViewOpsData {
	ScrArea *sa;
	ARegion *ar;
	View3D *v3d;
	RegionView3D *rv3d;

	/* needed for continuous zoom */
	wmTimer *timer;
	double timer_lastdraw;

	float oldquat[4];
	float trackvec[3];
	float mousevec[3]; /* dolly only */
	float reverse, dist0;
	float grid, far;
	short axis_snap; /* view rotate only */

	/* use for orbit selection and auto-dist */
	float ofs[3], dyn_ofs[3];
	short use_dyn_ofs;

	int origx, origy, oldx, oldy;
	int origkey; /* the key that triggered the operator */

} ViewOpsData;

#define TRACKBALLSIZE  (1.1)

static void calctrackballvec(rcti *rect, int mx, int my, float *vec)
{
	float x, y, radius, d, z, t;

	radius= TRACKBALLSIZE;

	/* normalize x and y */
	x= (rect->xmax + rect->xmin)/2 - mx;
	x/= (float)((rect->xmax - rect->xmin)/4);
	y= (rect->ymax + rect->ymin)/2 - my;
	y/= (float)((rect->ymax - rect->ymin)/2);

	d = sqrt(x*x + y*y);
	if (d < radius * (float)M_SQRT1_2) { /* Inside sphere */
		z= sqrt(radius*radius - d*d);
	}
	else { /* On hyperbola */
		t= radius / (float)M_SQRT2;
		z= t*t / d;
	}

	vec[0]= x;
	vec[1]= y;
	vec[2]= -z;		/* yah yah! */
}


static void viewops_data_create(bContext *C, wmOperator *op, wmEvent *event)
{
	static float lastofs[3] = {0,0,0};
	RegionView3D *rv3d;
	ViewOpsData *vod= MEM_callocN(sizeof(ViewOpsData), "viewops data");

	/* store data */
	op->customdata= vod;
	vod->sa= CTX_wm_area(C);
	vod->ar= CTX_wm_region(C);
	vod->v3d= vod->sa->spacedata.first;
	vod->rv3d= rv3d= vod->ar->regiondata;

	/* set the view from the camera, if view locking is enabled.
	 * we may want to make this optional but for now its needed always */
	ED_view3d_camera_lock_init(vod->v3d, vod->rv3d);

	vod->dist0= rv3d->dist;
	copy_qt_qt(vod->oldquat, rv3d->viewquat);
	vod->origx= vod->oldx= event->x;
	vod->origy= vod->oldy= event->y;
	vod->origkey= event->type; /* the key that triggered the operator.  */
	vod->use_dyn_ofs= (U.uiflag & USER_ORBIT_SELECTION) ? 1:0;
	copy_v3_v3(vod->ofs, rv3d->ofs);

	if (vod->use_dyn_ofs) {
		/* If there's no selection, lastofs is unmodified and last value since static */
		calculateTransformCenter(C, V3D_CENTROID, lastofs);
		negate_v3_v3(vod->dyn_ofs, lastofs);
	}
	else if (U.uiflag & USER_ORBIT_ZBUF) {

		view3d_operator_needs_opengl(C); /* needed for zbuf drawing */

		if((vod->use_dyn_ofs=ED_view3d_autodist(CTX_data_scene(C), vod->ar, vod->v3d, event->mval, vod->dyn_ofs))) {
			if (rv3d->is_persp) {
				float my_origin[3]; /* original G.vd->ofs */
				float my_pivot[3]; /* view */
				float dvec[3];

				// locals for dist correction
				float mat[3][3];
				float upvec[3];

				negate_v3_v3(my_origin, rv3d->ofs);				/* ofs is flipped */

				/* Set the dist value to be the distance from this 3d point */
				/* this means youll always be able to zoom into it and panning wont go bad when dist was zero */

				/* remove dist value */
				upvec[0] = upvec[1] = 0;
				upvec[2] = rv3d->dist;
				copy_m3_m4(mat, rv3d->viewinv);

				mul_m3_v3(mat, upvec);
				sub_v3_v3v3(my_pivot, rv3d->ofs, upvec);
				negate_v3(my_pivot);				/* ofs is flipped */

				/* find a new ofs value that is allong the view axis (rather than the mouse location) */
				closest_to_line_v3(dvec, vod->dyn_ofs, my_pivot, my_origin);
				vod->dist0 = rv3d->dist = len_v3v3(my_pivot, dvec);

				negate_v3_v3(rv3d->ofs, dvec);
			}
			negate_v3(vod->dyn_ofs);
			copy_v3_v3(vod->ofs, rv3d->ofs);
		}
	}

	{
		/* for dolly */
		float mval_f[2];
		VECCOPY2D(mval_f, event->mval);
		ED_view3d_win_to_vector(vod->ar, mval_f, vod->mousevec);
	}

	/* lookup, we dont pass on v3d to prevent confusement */
	vod->grid= vod->v3d->grid;
	vod->far= vod->v3d->far;

	calctrackballvec(&vod->ar->winrct, event->x, event->y, vod->trackvec);

	initgrabz(rv3d, -rv3d->ofs[0], -rv3d->ofs[1], -rv3d->ofs[2]);

	vod->reverse= 1.0f;
	if (rv3d->persmat[2][1] < 0.0f)
		vod->reverse= -1.0f;

	rv3d->rflag |= RV3D_NAVIGATING;
}

static void viewops_data_free(bContext *C, wmOperator *op)
{
	ARegion *ar;
	Paint *p = paint_get_active(CTX_data_scene(C));

	if(op->customdata) {
		ViewOpsData *vod= op->customdata;
		ar= vod->ar;
		vod->rv3d->rflag &= ~RV3D_NAVIGATING;

		if(vod->timer)
			WM_event_remove_timer(CTX_wm_manager(C), vod->timer->win, vod->timer);

		MEM_freeN(vod);
		op->customdata= NULL;
	}
	else {
		ar= CTX_wm_region(C);
	}

	if(p && (p->flags & PAINT_FAST_NAVIGATE))
		ED_region_tag_redraw(ar);
}

/* ************************** viewrotate **********************************/

static const float thres = 0.93f; //cos(20 deg);

#define COS45 0.70710678118654746
#define SIN45 COS45

static float snapquats[39][5] = {
	/*{q0, q1, q3, q4, view}*/
	{COS45, -SIN45, 0.0, 0.0, RV3D_VIEW_FRONT},  //front
	{0.0, 0.0, -SIN45, -SIN45, RV3D_VIEW_BACK}, //back
	{1.0, 0.0, 0.0, 0.0, RV3D_VIEW_TOP},       //top
	{0.0, -1.0, 0.0, 0.0, RV3D_VIEW_BOTTOM},      //bottom
	{0.5, -0.5, -0.5, -0.5, RV3D_VIEW_RIGHT},    //left
	{0.5, -0.5, 0.5, 0.5, RV3D_VIEW_LEFT},      //right

	/* some more 45 deg snaps */
	{0.65328145027160645, -0.65328145027160645, 0.27059805393218994, 0.27059805393218994, 0},
	{0.92387950420379639, 0.0, 0.0, 0.38268342614173889, 0},
	{0.0, -0.92387950420379639, 0.38268342614173889, 0.0, 0},
	{0.35355335474014282, -0.85355335474014282, 0.35355338454246521, 0.14644660055637360, 0},
	{0.85355335474014282, -0.35355335474014282, 0.14644660055637360, 0.35355338454246521, 0},
	{0.49999994039535522, -0.49999994039535522, 0.49999997019767761, 0.49999997019767761, 0},
	{0.27059802412986755, -0.65328145027160645, 0.65328145027160645, 0.27059802412986755, 0},
	{0.65328145027160645, -0.27059802412986755, 0.27059802412986755, 0.65328145027160645, 0},
	{0.27059799432754517, -0.27059799432754517, 0.65328139066696167, 0.65328139066696167, 0},
	{0.38268336653709412, 0.0, 0.0, 0.92387944459915161, 0},
	{0.0, -0.38268336653709412, 0.92387944459915161, 0.0, 0},
	{0.14644658565521240, -0.35355335474014282, 0.85355335474014282, 0.35355335474014282, 0},
	{0.35355335474014282, -0.14644658565521240, 0.35355335474014282, 0.85355335474014282, 0},
	{0.0, 0.0, 0.92387944459915161, 0.38268336653709412, 0},
	{-0.0, 0.0, 0.38268336653709412, 0.92387944459915161, 0},
	{-0.27059802412986755, 0.27059802412986755, 0.65328133106231689, 0.65328133106231689, 0},
	{-0.38268339633941650, 0.0, 0.0, 0.92387938499450684, 0},
	{0.0, 0.38268339633941650, 0.92387938499450684, 0.0, 0},
	{-0.14644658565521240, 0.35355338454246521, 0.85355329513549805, 0.35355332493782043, 0},
	{-0.35355338454246521, 0.14644658565521240, 0.35355332493782043, 0.85355329513549805, 0},
	{-0.49999991059303284, 0.49999991059303284, 0.49999985098838806, 0.49999985098838806, 0},
	{-0.27059799432754517, 0.65328145027160645, 0.65328139066696167, 0.27059799432754517, 0},
	{-0.65328145027160645, 0.27059799432754517, 0.27059799432754517, 0.65328139066696167, 0},
	{-0.65328133106231689, 0.65328133106231689, 0.27059793472290039, 0.27059793472290039, 0},
	{-0.92387932538986206, 0.0, 0.0, 0.38268333673477173, 0},
	{0.0, 0.92387932538986206, 0.38268333673477173, 0.0, 0},
	{-0.35355329513549805, 0.85355329513549805, 0.35355329513549805, 0.14644657075405121, 0},
	{-0.85355329513549805, 0.35355329513549805, 0.14644657075405121, 0.35355329513549805, 0},
	{-0.38268330693244934, 0.92387938499450684, 0.0, 0.0, 0},
	{-0.92387938499450684, 0.38268330693244934, 0.0, 0.0, 0},
	{-COS45, 0.0, 0.0, SIN45, 0},
	{COS45, 0.0, 0.0, SIN45, 0},
	{0.0, 0.0, 0.0, 1.0, 0}
};

enum {
	VIEW_PASS= 0,
	VIEW_APPLY,
	VIEW_CONFIRM
};

/* NOTE: these defines are saved in keymap files, do not change values but just add new ones */
#define VIEW_MODAL_CONFIRM				1 /* used for all view operations */
#define VIEWROT_MODAL_AXIS_SNAP_ENABLE	2
#define VIEWROT_MODAL_AXIS_SNAP_DISABLE	3
#define VIEWROT_MODAL_SWITCH_ZOOM		4
#define VIEWROT_MODAL_SWITCH_MOVE		5
#define VIEWROT_MODAL_SWITCH_ROTATE		6

/* called in transform_ops.c, on each regeneration of keymaps  */
void viewrotate_modal_keymap(wmKeyConfig *keyconf)
{
	static EnumPropertyItem modal_items[] = {
	{VIEW_MODAL_CONFIRM,	"CONFIRM", 0, "Confirm", ""},

	{VIEWROT_MODAL_AXIS_SNAP_ENABLE,	"AXIS_SNAP_ENABLE", 0, "Enable Axis Snap", ""},
	{VIEWROT_MODAL_AXIS_SNAP_DISABLE,	"AXIS_SNAP_DISABLE", 0, "Disable Axis Snap", ""},
		
	{VIEWROT_MODAL_SWITCH_ZOOM, "SWITCH_TO_ZOOM", 0, "Switch to Zoom"},
	{VIEWROT_MODAL_SWITCH_MOVE, "SWITCH_TO_MOVE", 0, "Switch to Move"},

	{0, NULL, 0, NULL, NULL}};

	wmKeyMap *keymap= WM_modalkeymap_get(keyconf, "View3D Rotate Modal");

	/* this function is called for each spacetype, only needs to add map once */
	if(keymap) return;

	keymap= WM_modalkeymap_add(keyconf, "View3D Rotate Modal", modal_items);

	/* items for modal map */
	WM_modalkeymap_add_item(keymap, MIDDLEMOUSE, KM_RELEASE, KM_ANY, 0, VIEW_MODAL_CONFIRM);
	WM_modalkeymap_add_item(keymap, ESCKEY, KM_PRESS, KM_ANY, 0, VIEW_MODAL_CONFIRM);

	WM_modalkeymap_add_item(keymap, LEFTALTKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_AXIS_SNAP_ENABLE);
	WM_modalkeymap_add_item(keymap, LEFTALTKEY, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_AXIS_SNAP_DISABLE);

	/* disabled mode switching for now, can re-implement better, later on
	WM_modalkeymap_add_item(keymap, LEFTMOUSE, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ZOOM);
	WM_modalkeymap_add_item(keymap, LEFTCTRLKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ZOOM);
	WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_MOVE);
	*/
	
	/* assign map to operators */
	WM_modalkeymap_assign(keymap, "VIEW3D_OT_rotate");

}

static void viewrotate_apply(ViewOpsData *vod, int x, int y)
{
	RegionView3D *rv3d= vod->rv3d;

	rv3d->view= RV3D_VIEW_USER; /* need to reset everytime because of view snapping */

	if (U.flag & USER_TRACKBALL) {
		float phi, si, q1[4], dvec[3], newvec[3];

		calctrackballvec(&vod->ar->winrct, x, y, newvec);

		sub_v3_v3v3(dvec, newvec, vod->trackvec);

		si= sqrt(dvec[0]*dvec[0]+ dvec[1]*dvec[1]+ dvec[2]*dvec[2]);
		si /= (float)(2.0 * TRACKBALLSIZE);

		cross_v3_v3v3(q1+1, vod->trackvec, newvec);
		normalize_v3(q1+1);

		/* Allow for rotation beyond the interval
			* [-pi, pi] */
		while (si > 1.0f)
			si -= 2.0f;

		/* This relation is used instead of
			* phi = asin(si) so that the angle
			* of rotation is linearly proportional
			* to the distance that the mouse is
			* dragged. */
		phi = si * (float)(M_PI / 2.0);

		q1[0]= cos(phi);
		mul_v3_fl(q1+1, sin(phi));
		mul_qt_qtqt(rv3d->viewquat, q1, vod->oldquat);

		if (vod->use_dyn_ofs) {
			/* compute the post multiplication quat, to rotate the offset correctly */
			copy_qt_qt(q1, vod->oldquat);
			conjugate_qt(q1);
			mul_qt_qtqt(q1, q1, rv3d->viewquat);

			conjugate_qt(q1); /* conj == inv for unit quat */
			copy_v3_v3(rv3d->ofs, vod->ofs);
			sub_v3_v3(rv3d->ofs, vod->dyn_ofs);
			mul_qt_v3(q1, rv3d->ofs);
			add_v3_v3(rv3d->ofs, vod->dyn_ofs);
		}
	}
	else {
		/* New turntable view code by John Aughey */
		float phi, q1[4];
		float m[3][3];
		float m_inv[3][3];
		float xvec[3] = {1.0f, 0.0f, 0.0f};
		/* Sensitivity will control how fast the viewport rotates.  0.0035 was
			obtained experimentally by looking at viewport rotation sensitivities
			on other modeling programs. */
		/* Perhaps this should be a configurable user parameter. */
		const float sensitivity = 0.0035f;

		/* Get the 3x3 matrix and its inverse from the quaternion */
		quat_to_mat3( m,rv3d->viewquat);
		invert_m3_m3(m_inv,m);

		/* Determine the direction of the x vector (for rotating up and down) */
		/* This can likely be computed directly from the quaternion. */
		mul_m3_v3(m_inv,xvec);

		/* Perform the up/down rotation */
		phi = sensitivity * -(y - vod->oldy);
		q1[0] = cos(phi);
		mul_v3_v3fl(q1+1, xvec, sin(phi));
		mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, q1);

		if (vod->use_dyn_ofs) {
			conjugate_qt(q1); /* conj == inv for unit quat */
			sub_v3_v3(rv3d->ofs, vod->dyn_ofs);
			mul_qt_v3(q1, rv3d->ofs);
			add_v3_v3(rv3d->ofs, vod->dyn_ofs);
		}

		/* Perform the orbital rotation */
		phi = sensitivity * vod->reverse * (x - vod->oldx);
		q1[0] = cos(phi);
		q1[1] = q1[2] = 0.0;
		q1[3] = sin(phi);
		mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, q1);

		if (vod->use_dyn_ofs) {
			conjugate_qt(q1);
			sub_v3_v3(rv3d->ofs, vod->dyn_ofs);
			mul_qt_v3(q1, rv3d->ofs);
			add_v3_v3(rv3d->ofs, vod->dyn_ofs);
		}
	}

	/* check for view snap */
	if (vod->axis_snap){
		int i;
		float viewquat_inv[4];
		float zaxis[3]={0,0,1};
		invert_qt_qt(viewquat_inv, rv3d->viewquat);

		mul_qt_v3(viewquat_inv, zaxis);

		for (i = 0 ; i < 39; i++){

			float view = (int)snapquats[i][4];
			float viewquat_inv_test[4];
			float zaxis_test[3]={0,0,1};

			invert_qt_qt(viewquat_inv_test, snapquats[i]);
			mul_qt_v3(viewquat_inv_test, zaxis_test);
			
			if(angle_v3v3(zaxis_test, zaxis) < DEG2RADF(45/3)) {
				/* find the best roll */
				float quat_roll[4], quat_final[4], quat_best[4];
				float viewquat_align[4]; /* viewquat aligned to zaxis_test */
				float viewquat_align_inv[4]; /* viewquat aligned to zaxis_test */
				float best_angle = FLT_MAX;
				int j;

				/* viewquat_align is the original viewquat aligned to the snapped axis
				 * for testing roll */
				rotation_between_vecs_to_quat(viewquat_align, zaxis_test, zaxis);
				normalize_qt(viewquat_align);
				mul_qt_qtqt(viewquat_align, rv3d->viewquat, viewquat_align);
				normalize_qt(viewquat_align);
				invert_qt_qt(viewquat_align_inv, viewquat_align);

				/* find best roll */
				for(j= 0; j<8; j++) {
					float angle;
					float xaxis1[3]={1,0,0};
					float xaxis2[3]={1,0,0};
					float quat_final_inv[4];

					axis_angle_to_quat(quat_roll, zaxis_test, (float)j * DEG2RADF(45.0f));
					normalize_qt(quat_roll);

					mul_qt_qtqt(quat_final, snapquats[i], quat_roll);
					normalize_qt(quat_final);
					
					/* compare 2 vector angles to find the least roll */
					invert_qt_qt(quat_final_inv, quat_final);
					mul_qt_v3(viewquat_align_inv, xaxis1);
					mul_qt_v3(quat_final_inv, xaxis2);
					angle= angle_v3v3(xaxis1, xaxis2);

					if(angle <= best_angle) {
						best_angle= angle;
						copy_qt_qt(quat_best, quat_final);
						if(j) view= 0; /* view grid assumes certain up axis */
					}
				}

				copy_qt_qt(rv3d->viewquat, quat_best);
				rv3d->view= view; /* if we snap to a rolled camera the grid is invalid */

				break;
			}
		}
	}
	vod->oldx= x;
	vod->oldy= y;

	/* avoid precision loss over time */
	normalize_qt(rv3d->viewquat);

	ED_view3d_camera_lock_sync(vod->v3d, rv3d);

	ED_region_tag_redraw(vod->ar);
}

static int viewrotate_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod= op->customdata;
	short event_code= VIEW_PASS;

	/* execute the events */
	if(event->type==MOUSEMOVE) {
		event_code= VIEW_APPLY;
	}
	else if(event->type==EVT_MODAL_MAP) {
		switch (event->val) {
			case VIEW_MODAL_CONFIRM:
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_AXIS_SNAP_ENABLE:
				vod->axis_snap= TRUE;
				event_code= VIEW_APPLY;
				break;
			case VIEWROT_MODAL_AXIS_SNAP_DISABLE:
				vod->axis_snap= FALSE;
				event_code= VIEW_APPLY;
				break;
			case VIEWROT_MODAL_SWITCH_ZOOM:
				WM_operator_name_call(C, "VIEW3D_OT_zoom", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_MOVE:
				WM_operator_name_call(C, "VIEW3D_OT_move", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
		}
	}
	else if(event->type==vod->origkey && event->val==KM_RELEASE) {
		event_code= VIEW_CONFIRM;
	}

	if(event_code==VIEW_APPLY) {
		viewrotate_apply(vod, event->x, event->y);
	}
	else if (event_code==VIEW_CONFIRM) {
		ED_view3d_depth_tag_update(vod->rv3d);
		viewops_data_free(C, op);

		return OPERATOR_FINISHED;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int viewrotate_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod;
	RegionView3D *rv3d;

	/* makes op->customdata */
	viewops_data_create(C, op, event);
	vod= op->customdata;
	rv3d= vod->rv3d;

	if(rv3d->viewlock) { /* poll should check but in some cases fails, see poll func for details */
		viewops_data_free(C, op);
		return OPERATOR_PASS_THROUGH;
	}

	/* switch from camera view when: */
	if(rv3d->persp != RV3D_PERSP) {

		if (U.uiflag & USER_AUTOPERSP) {
			if(!ED_view3d_camera_lock_check(vod->v3d, vod->rv3d)) {
				rv3d->persp= RV3D_PERSP;
			}
		}
		else if(rv3d->persp==RV3D_CAMOB) {

			/* changed since 2.4x, use the camera view */
			if(vod->v3d->camera) {
				ED_view3d_from_object(vod->v3d->camera, rv3d->ofs, rv3d->viewquat, &rv3d->dist, NULL);
			}

			if(!ED_view3d_camera_lock_check(vod->v3d, vod->rv3d)) {
				rv3d->persp= rv3d->lpersp;
			}
		}
		ED_region_tag_redraw(vod->ar);
	}
	
	if (event->type == MOUSEPAN) {
		viewrotate_apply(vod, event->prevx, event->prevy);
		ED_view3d_depth_tag_update(rv3d);
		
		viewops_data_free(C, op);
		
		return OPERATOR_FINISHED;
	}
	else if (event->type == MOUSEROTATE) {
		/* MOUSEROTATE performs orbital rotation, so y axis delta is set to 0 */
		viewrotate_apply(vod, event->prevx, event->y);
		ED_view3d_depth_tag_update(rv3d);
		
		viewops_data_free(C, op);
		
		return OPERATOR_FINISHED;
	}
	else {		
		/* add temp handler */
		WM_event_add_modal_handler(C, op);

		return OPERATOR_RUNNING_MODAL;
	}
}

static int view3d_camera_active_poll(bContext *C)
{
	if(ED_operator_view3d_active(C)) {
		RegionView3D *rv3d= CTX_wm_region_view3d(C);
		if(rv3d && rv3d->persp==RV3D_CAMOB) {
			return 1;
		}
	}

	return 0;
}

static int viewrotate_cancel(bContext *C, wmOperator *op)
{
	viewops_data_free(C, op);

	return OPERATOR_CANCELLED;
}

void VIEW3D_OT_rotate(wmOperatorType *ot)
{

	/* identifiers */
	ot->name= "Rotate view";
	ot->description = "Rotate the view";
	ot->idname= "VIEW3D_OT_rotate";

	/* api callbacks */
	ot->invoke= viewrotate_invoke;
	ot->modal= viewrotate_modal;
	ot->poll= ED_operator_region_view3d_active;
	ot->cancel= viewrotate_cancel;

	/* flags */
	ot->flag= OPTYPE_BLOCKING|OPTYPE_GRAB_POINTER;
}

// NDOF utility functions
// (should these functions live in this file?)
float ndof_to_axis_angle(struct wmNDOFMotionData* ndof, float axis[3])
{
	return ndof->dt * normalize_v3_v3(axis, ndof->rvec);
}

void ndof_to_quat(struct wmNDOFMotionData* ndof, float q[4])
{
	float axis[3];
	float angle;

	angle= ndof_to_axis_angle(ndof, axis);
	axis_angle_to_quat(q, axis, angle);
}

/* -- "orbit" navigation (trackball/turntable)
 * -- zooming
 * -- panning in rotationally-locked views
 */
static int ndof_orbit_invoke(bContext *C, wmOperator *UNUSED(op), wmEvent *event)
{
	if (event->type != NDOF_MOTION) {
		return OPERATOR_CANCELLED;
	}
	else {
		View3D *v3d= CTX_wm_view3d(C);
		RegionView3D* rv3d = CTX_wm_region_view3d(C);
		wmNDOFMotionData* ndof = (wmNDOFMotionData*) event->customdata;

		ED_view3d_camera_lock_init(v3d, rv3d);

		rv3d->rot_angle = 0.f; // off by default, until changed later this function

		if (ndof->progress != P_FINISHING) {
			const float dt = ndof->dt;
		
			// tune these until everything feels right
			const float rot_sensitivity = 1.f;
			const float zoom_sensitivity = 1.f;
			const float pan_sensitivity = 1.f;
		
			// rather have bool, but...
			int has_rotation = rv3d->viewlock != RV3D_LOCKED && !is_zero_v3(ndof->rvec);
		
			float view_inv[4];
			invert_qt_qt(view_inv, rv3d->viewquat);
		
			//#define DEBUG_NDOF_MOTION
			#ifdef DEBUG_NDOF_MOTION
			printf("ndof: T=(%.2f,%.2f,%.2f) R=(%.2f,%.2f,%.2f) dt=%.3f delivered to 3D view\n",
				ndof->tx, ndof->ty, ndof->tz, ndof->rx, ndof->ry, ndof->rz, ndof->dt);
			#endif
		
			if (ndof->tvec[2]) {
				// Zoom!
				// velocity should be proportional to the linear velocity attained by rotational motion of same strength
				// [got that?]
				// proportional to arclength = radius * angle
		
				float zoom_distance = zoom_sensitivity * rv3d->dist * dt * ndof->tvec[2];

				if (U.ndof_flag & NDOF_ZOOM_INVERT)
					zoom_distance = -zoom_distance;

				rv3d->dist += zoom_distance;
			}
		
			if (rv3d->viewlock == RV3D_LOCKED) {
				/* rotation not allowed -- explore panning options instead */
				float pan_vec[3] = {ndof->tvec[0], ndof->tvec[1], 0.0f};
				mul_v3_fl(pan_vec, pan_sensitivity * rv3d->dist * dt);
		
				/* transform motion from view to world coordinates */
				invert_qt_qt(view_inv, rv3d->viewquat);
				mul_qt_v3(view_inv, pan_vec);
		
				/* move center of view opposite of hand motion (this is camera mode, not object mode) */
				sub_v3_v3(rv3d->ofs, pan_vec);
			}
		
			if (has_rotation) {
		
				const int invert = U.ndof_flag & NDOF_ORBIT_INVERT_AXES;
		
				rv3d->view = RV3D_VIEW_USER;
		
				if (U.flag & USER_TRACKBALL) {
					float rot[4];
					float axis[3];
					float angle = rot_sensitivity * ndof_to_axis_angle(ndof, axis);
		
					if (invert)
						angle = -angle;
		
					// transform rotation axis from view to world coordinates
					mul_qt_v3(view_inv, axis);
		
					// update the onscreen doo-dad
					rv3d->rot_angle = angle;
					copy_v3_v3(rv3d->rot_axis, axis);
		
					axis_angle_to_quat(rot, axis, angle);

					// apply rotation
					mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, rot);
				} else {
					/* turntable view code by John Aughey, adapted for 3D mouse by [mce] */
					float angle, rot[4];
					float xvec[3] = {1,0,0};
		
					/* Determine the direction of the x vector (for rotating up and down) */
					mul_qt_v3(view_inv, xvec);
		
					/* Perform the up/down rotation */
					angle = rot_sensitivity * dt * ndof->rvec[0];
					if (invert)
						angle = -angle;
					rot[0] = cos(angle);
					mul_v3_v3fl(rot+1, xvec, sin(angle));
					mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, rot);
		
					/* Perform the orbital rotation */
					angle = rot_sensitivity * dt * ndof->rvec[1];
					if (invert)
						angle = -angle;
		
					// update the onscreen doo-dad
					rv3d->rot_angle = angle;
					rv3d->rot_axis[0] = 0;
					rv3d->rot_axis[1] = 0;
					rv3d->rot_axis[2] = 1;
		
					rot[0] = cos(angle);
					rot[1] = rot[2] = 0.0;
					rot[3] = sin(angle);
					mul_qt_qtqt(rv3d->viewquat, rv3d->viewquat, rot);
				}
			}
		}

		ED_view3d_camera_lock_sync(v3d, rv3d);

		ED_region_tag_redraw(CTX_wm_region(C));

		return OPERATOR_FINISHED;
	}
}

void VIEW3D_OT_ndof_orbit(struct wmOperatorType *ot)
{
	/* identifiers */
	ot->name = "NDOF Orbit View";
	ot->description = "Explore every angle of an object using the 3D mouse.";
	ot->idname = "VIEW3D_OT_ndof_orbit";

	/* api callbacks */
	ot->invoke = ndof_orbit_invoke;
	ot->poll = ED_operator_view3d_active;

	/* flags */
	ot->flag = 0;
}

/* -- "pan" navigation
 * -- zoom or dolly?
 */
static int ndof_pan_invoke(bContext *C, wmOperator *UNUSED(op), wmEvent *event)
{
	if (event->type != NDOF_MOTION) {
		return OPERATOR_CANCELLED;
	}
	else {
		View3D *v3d= CTX_wm_view3d(C);
		RegionView3D* rv3d = CTX_wm_region_view3d(C);
		wmNDOFMotionData* ndof = (wmNDOFMotionData*) event->customdata;

		ED_view3d_camera_lock_init(v3d, rv3d);

		rv3d->rot_angle = 0.f; // we're panning here! so erase any leftover rotation from other operators

		if (ndof->progress != P_FINISHING) {
			const float dt = ndof->dt;
			float view_inv[4];
#if 0 // ------------------------------------------- zoom with Z
			// tune these until everything feels right
			const float zoom_sensitivity = 1.f;
			const float pan_sensitivity = 1.f;

			float pan_vec[3] = {
				ndof->tx, ndof->ty, 0
				};

			// "zoom in" or "translate"? depends on zoom mode in user settings?
			if (ndof->tz) {
				float zoom_distance = zoom_sensitivity * rv3d->dist * dt * ndof->tz;
				rv3d->dist += zoom_distance;
			}
		
			mul_v3_fl(pan_vec, pan_sensitivity * rv3d->dist * dt);
#else // ------------------------------------------------------- dolly with Z
			float speed = 10.f; // blender units per second
			// ^^ this is ok for default cube scene, but should scale with.. something

			// tune these until everything feels right
			const float forward_sensitivity = 1.f;
			const float vertical_sensitivity = 0.4f;
			const float lateral_sensitivity = 0.6f;

			float pan_vec[3] = {lateral_sensitivity * ndof->tvec[0],
								vertical_sensitivity * ndof->tvec[1],
								forward_sensitivity * ndof->tvec[2]
							   };

			mul_v3_fl(pan_vec, speed * dt);
#endif
			/* transform motion from view to world coordinates */
			invert_qt_qt(view_inv, rv3d->viewquat);
			mul_qt_v3(view_inv, pan_vec);

			/* move center of view opposite of hand motion (this is camera mode, not object mode) */
			sub_v3_v3(rv3d->ofs, pan_vec);
		}

		ED_view3d_camera_lock_sync(v3d, rv3d);

		ED_region_tag_redraw(CTX_wm_region(C));

		return OPERATOR_FINISHED;
	}
}

void VIEW3D_OT_ndof_pan(struct wmOperatorType *ot)
{
	/* identifiers */
	ot->name = "NDOF Pan View";
	ot->description = "Position your viewpoint with the 3D mouse.";
	ot->idname = "VIEW3D_OT_ndof_pan";

	/* api callbacks */
	ot->invoke = ndof_pan_invoke;
	ot->poll = ED_operator_view3d_active;

	/* flags */
	ot->flag = 0;
}

/* ************************ viewmove ******************************** */


/* NOTE: these defines are saved in keymap files, do not change values but just add new ones */

/* called in transform_ops.c, on each regeneration of keymaps  */
void viewmove_modal_keymap(wmKeyConfig *keyconf)
{
	static EnumPropertyItem modal_items[] = {
	{VIEW_MODAL_CONFIRM,	"CONFIRM", 0, "Confirm", ""},
		
	{VIEWROT_MODAL_SWITCH_ZOOM, "SWITCH_TO_ZOOM", 0, "Switch to Zoom"},
	{VIEWROT_MODAL_SWITCH_ROTATE, "SWITCH_TO_ROTATE", 0, "Switch to Rotate"},

	{0, NULL, 0, NULL, NULL}};

	wmKeyMap *keymap= WM_modalkeymap_get(keyconf, "View3D Move Modal");

	/* this function is called for each spacetype, only needs to add map once */
	if(keymap) return;

	keymap= WM_modalkeymap_add(keyconf, "View3D Move Modal", modal_items);

	/* items for modal map */
	WM_modalkeymap_add_item(keymap, MIDDLEMOUSE, KM_RELEASE, KM_ANY, 0, VIEW_MODAL_CONFIRM);
	WM_modalkeymap_add_item(keymap, ESCKEY, KM_PRESS, KM_ANY, 0, VIEW_MODAL_CONFIRM);

	/* disabled mode switching for now, can re-implement better, later on
	WM_modalkeymap_add_item(keymap, LEFTMOUSE, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ZOOM);
	WM_modalkeymap_add_item(keymap, LEFTCTRLKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ZOOM);
	WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
	*/
	
	/* assign map to operators */
	WM_modalkeymap_assign(keymap, "VIEW3D_OT_move");
}


static void viewmove_apply(ViewOpsData *vod, int x, int y)
{
	if((vod->rv3d->persp==RV3D_CAMOB) && !ED_view3d_camera_lock_check(vod->v3d, vod->rv3d)) {
		const float zoomfac= BKE_screen_view3d_zoom_to_fac((float)vod->rv3d->camzoom) * 2.0f;
		vod->rv3d->camdx += (vod->oldx - x)/(vod->ar->winx * zoomfac);
		vod->rv3d->camdy += (vod->oldy - y)/(vod->ar->winy * zoomfac);
		CLAMP(vod->rv3d->camdx, -1.0f, 1.0f);
		CLAMP(vod->rv3d->camdy, -1.0f, 1.0f);
	}
	else {
		float dvec[3];
		float mval_f[2];

		mval_f[0]= x - vod->oldx;
		mval_f[1]= y - vod->oldy;
		ED_view3d_win_to_delta(vod->ar, mval_f, dvec);

		add_v3_v3(vod->rv3d->ofs, dvec);

		if(vod->rv3d->viewlock & RV3D_BOXVIEW)
			view3d_boxview_sync(vod->sa, vod->ar);
	}

	vod->oldx= x;
	vod->oldy= y;

	ED_view3d_camera_lock_sync(vod->v3d, vod->rv3d);

	ED_region_tag_redraw(vod->ar);
}


static int viewmove_modal(bContext *C, wmOperator *op, wmEvent *event)
{

	ViewOpsData *vod= op->customdata;
	short event_code= VIEW_PASS;

	/* execute the events */
	if(event->type==MOUSEMOVE) {
		event_code= VIEW_APPLY;
	}
	else if(event->type==EVT_MODAL_MAP) {
		switch (event->val) {
			case VIEW_MODAL_CONFIRM:
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_ZOOM:
				WM_operator_name_call(C, "VIEW3D_OT_zoom", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_ROTATE:
				WM_operator_name_call(C, "VIEW3D_OT_rotate", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
		}
	}
	else if(event->type==vod->origkey && event->val==KM_RELEASE) {
		event_code= VIEW_CONFIRM;
	}

	if(event_code==VIEW_APPLY) {
		viewmove_apply(vod, event->x, event->y);
	}
	else if (event_code==VIEW_CONFIRM) {
		ED_view3d_depth_tag_update(vod->rv3d);

		viewops_data_free(C, op);

		return OPERATOR_FINISHED;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int viewmove_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod;

	/* makes op->customdata */
	viewops_data_create(C, op, event);
	vod= op->customdata;

	if (event->type == MOUSEPAN) {
		viewmove_apply(vod, event->prevx, event->prevy);
		ED_view3d_depth_tag_update(vod->rv3d);
		
		viewops_data_free(C, op);		
		
		return OPERATOR_FINISHED;
	}
	else {
		/* add temp handler */
		WM_event_add_modal_handler(C, op);

		return OPERATOR_RUNNING_MODAL;
	}
}

static int viewmove_cancel(bContext *C, wmOperator *op)
{
	viewops_data_free(C, op);

	return OPERATOR_CANCELLED;
}

void VIEW3D_OT_move(wmOperatorType *ot)
{

	/* identifiers */
	ot->name= "Move view";
	ot->description = "Move the view";
	ot->idname= "VIEW3D_OT_move";

	/* api callbacks */
	ot->invoke= viewmove_invoke;
	ot->modal= viewmove_modal;
	ot->poll= ED_operator_view3d_active;
	ot->cancel= viewmove_cancel;

	/* flags */
	ot->flag= OPTYPE_BLOCKING|OPTYPE_GRAB_POINTER;
}

/* ************************ viewzoom ******************************** */

/* viewdolly_modal_keymap has an exact copy of this, apply fixes to both */
/* called in transform_ops.c, on each regeneration of keymaps  */
void viewzoom_modal_keymap(wmKeyConfig *keyconf)
{
	static EnumPropertyItem modal_items[] = {
	{VIEW_MODAL_CONFIRM,	"CONFIRM", 0, "Confirm", ""},
		
	{VIEWROT_MODAL_SWITCH_ROTATE, "SWITCH_TO_ROTATE", 0, "Switch to Rotate"},
	{VIEWROT_MODAL_SWITCH_MOVE, "SWITCH_TO_MOVE", 0, "Switch to Move"},

	{0, NULL, 0, NULL, NULL}};

	wmKeyMap *keymap= WM_modalkeymap_get(keyconf, "View3D Zoom Modal");

	/* this function is called for each spacetype, only needs to add map once */
	if(keymap) return;

	keymap= WM_modalkeymap_add(keyconf, "View3D Zoom Modal", modal_items);

	/* items for modal map */
	WM_modalkeymap_add_item(keymap, MIDDLEMOUSE, KM_RELEASE, KM_ANY, 0, VIEW_MODAL_CONFIRM);
	WM_modalkeymap_add_item(keymap, ESCKEY, KM_PRESS, KM_ANY, 0, VIEW_MODAL_CONFIRM);

	/* disabled mode switching for now, can re-implement better, later on
	WM_modalkeymap_add_item(keymap, LEFTMOUSE, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
	WM_modalkeymap_add_item(keymap, LEFTCTRLKEY, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
	WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_MOVE);
	 */
	
	/* assign map to operators */
	WM_modalkeymap_assign(keymap, "VIEW3D_OT_zoom");
}

static void view_zoom_mouseloc(ARegion *ar, float dfac, int mx, int my)
{
	RegionView3D *rv3d= ar->regiondata;

	if(U.uiflag & USER_ZOOM_TO_MOUSEPOS) {
		float dvec[3];
		float tvec[3];
		float tpos[3];
		float mval_f[2];
		float new_dist;

		negate_v3_v3(tpos, rv3d->ofs);

		/* Project cursor position into 3D space */
		initgrabz(rv3d, tpos[0], tpos[1], tpos[2]);

		mval_f[0]= (float)(((mx - ar->winrct.xmin) * 2) - ar->winx) / 2.0f;
		mval_f[1]= (float)(((my - ar->winrct.ymin) * 2) - ar->winy) / 2.0f;
		ED_view3d_win_to_delta(ar, mval_f, dvec);

		/* Calculate view target position for dolly */
		add_v3_v3v3(tvec, tpos, dvec);
		negate_v3(tvec);

		/* Offset to target position and dolly */
		new_dist = rv3d->dist * dfac;

		copy_v3_v3(rv3d->ofs, tvec);
		rv3d->dist = new_dist;

		/* Calculate final offset */
		madd_v3_v3v3fl(rv3d->ofs, tvec, dvec, dfac);
	} else {
		rv3d->dist *= dfac;
	}
}


static void viewzoom_apply(ViewOpsData *vod, int x, int y, const short viewzoom, const short zoom_invert)
{
	float zfac=1.0;

	if(viewzoom==USER_ZOOM_CONT) {
		double time= PIL_check_seconds_timer();
		float time_step= (float)(time - vod->timer_lastdraw);
		float fac;

		if (U.uiflag & USER_ZOOM_HORIZ) {
			fac= (float)(x - vod->origx);
		}
		else {
			fac= (float)(y - vod->origy);
		}

		if(zoom_invert) {
			fac= -fac;
		}

		// oldstyle zoom
		zfac = 1.0f + ((fac / 20.0f) * time_step);
		vod->timer_lastdraw= time;
	}
	else if(viewzoom==USER_ZOOM_SCALE) {
		int ctr[2], len1, len2;
		// method which zooms based on how far you move the mouse

		ctr[0] = (vod->ar->winrct.xmax + vod->ar->winrct.xmin)/2;
		ctr[1] = (vod->ar->winrct.ymax + vod->ar->winrct.ymin)/2;

		len1 = (int)sqrt((ctr[0] - x)*(ctr[0] - x) + (ctr[1] - y)*(ctr[1] - y)) + 5;
		len2 = (int)sqrt((ctr[0] - vod->origx)*(ctr[0] - vod->origx) + (ctr[1] - vod->origy)*(ctr[1] - vod->origy)) + 5;

		zfac = vod->dist0 * ((float)len2/len1) / vod->rv3d->dist;
	}
	else {	/* USER_ZOOM_DOLLY */
		float len1, len2;
		
		if (U.uiflag & USER_ZOOM_HORIZ) {
			len1 = (vod->ar->winrct.xmax - x) + 5;
			len2 = (vod->ar->winrct.xmax - vod->origx) + 5;
		}
		else {
			len1 = (vod->ar->winrct.ymax - y) + 5;
			len2 = (vod->ar->winrct.ymax - vod->origy) + 5;
		}
		if (zoom_invert) {
			SWAP(float, len1, len2);
		}
		
		zfac = vod->dist0 * (2.0f * ((len2/len1)-1.0f) + 1.0f) / vod->rv3d->dist;
	}

	if(zfac != 1.0f && zfac*vod->rv3d->dist > 0.001f * vod->grid &&
			zfac * vod->rv3d->dist < 10.0f * vod->far)
		view_zoom_mouseloc(vod->ar, zfac, vod->oldx, vod->oldy);

	/* these limits were in old code too */
	if(vod->rv3d->dist<0.001f * vod->grid) vod->rv3d->dist= 0.001f * vod->grid;
	if(vod->rv3d->dist>10.0f * vod->far) vod->rv3d->dist=10.0f * vod->far;

	if(vod->rv3d->viewlock & RV3D_BOXVIEW)
		view3d_boxview_sync(vod->sa, vod->ar);

	ED_view3d_camera_lock_sync(vod->v3d, vod->rv3d);

	ED_region_tag_redraw(vod->ar);
}


static int viewzoom_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod= op->customdata;
	short event_code= VIEW_PASS;

	/* execute the events */
	if (event->type == TIMER && event->customdata == vod->timer) {
		/* continuous zoom */
		event_code= VIEW_APPLY;
	}
	else if(event->type==MOUSEMOVE) {
		event_code= VIEW_APPLY;
	}
	else if(event->type==EVT_MODAL_MAP) {
		switch (event->val) {
			case VIEW_MODAL_CONFIRM:
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_MOVE:
				WM_operator_name_call(C, "VIEW3D_OT_move", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_ROTATE:
				WM_operator_name_call(C, "VIEW3D_OT_rotate", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
		}
	}
	else if(event->type==vod->origkey && event->val==KM_RELEASE) {
		event_code= VIEW_CONFIRM;
	}

	if(event_code==VIEW_APPLY) {
		viewzoom_apply(vod, event->x, event->y, U.viewzoom, (U.uiflag & USER_ZOOM_INVERT) != 0);
	}
	else if (event_code==VIEW_CONFIRM) {
		ED_view3d_depth_tag_update(vod->rv3d);
		viewops_data_free(C, op);

		return OPERATOR_FINISHED;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int viewzoom_exec(bContext *C, wmOperator *op)
{
	View3D *v3d;
	RegionView3D *rv3d;
	ScrArea *sa;
	ARegion *ar;
	short use_cam_zoom;

	int delta= RNA_int_get(op->ptr, "delta");
	int mx, my;

	if(op->customdata) {
		ViewOpsData *vod= op->customdata;

		sa= vod->sa;
		ar= vod->ar;
	}
	else {
		sa= CTX_wm_area(C);
		ar= CTX_wm_region(C);
	}

	v3d= sa->spacedata.first;
	rv3d= ar->regiondata;

	mx= RNA_property_is_set(op->ptr, "mx") ? RNA_int_get(op->ptr, "mx") : ar->winx / 2;
	my= RNA_property_is_set(op->ptr, "my") ? RNA_int_get(op->ptr, "my") : ar->winy / 2;

	use_cam_zoom= (rv3d->persp==RV3D_CAMOB) && !(rv3d->is_persp && ED_view3d_camera_lock_check(v3d, rv3d));

	if(delta < 0) {
		/* this min and max is also in viewmove() */
		if(use_cam_zoom) {
			rv3d->camzoom-= 10;
			if(rv3d->camzoom < RV3D_CAMZOOM_MIN) rv3d->camzoom= RV3D_CAMZOOM_MIN;
		}
		else if(rv3d->dist < 10.0f * v3d->far) {
			view_zoom_mouseloc(ar, 1.2f, mx, my);
		}
	}
	else {
		if(use_cam_zoom) {
			rv3d->camzoom+= 10;
			if(rv3d->camzoom > RV3D_CAMZOOM_MAX) rv3d->camzoom= RV3D_CAMZOOM_MAX;
		}
		else if(rv3d->dist> 0.001f * v3d->grid) {
			view_zoom_mouseloc(ar, .83333f, mx, my);
		}
	}

	if(rv3d->viewlock & RV3D_BOXVIEW)
		view3d_boxview_sync(sa, ar);

	ED_view3d_depth_tag_update(rv3d);

	ED_view3d_camera_lock_sync(v3d, rv3d);

	ED_region_tag_redraw(ar);

	viewops_data_free(C, op);

	return OPERATOR_FINISHED;
}

/* this is an exact copy of viewzoom_modal_keymap */
/* called in transform_ops.c, on each regeneration of keymaps  */
void viewdolly_modal_keymap(wmKeyConfig *keyconf)
{
	static EnumPropertyItem modal_items[] = {
	{VIEW_MODAL_CONFIRM,	"CONFIRM", 0, "Confirm", ""},

	{VIEWROT_MODAL_SWITCH_ROTATE, "SWITCH_TO_ROTATE", 0, "Switch to Rotate"},
	{VIEWROT_MODAL_SWITCH_MOVE, "SWITCH_TO_MOVE", 0, "Switch to Move"},

	{0, NULL, 0, NULL, NULL}};

	wmKeyMap *keymap= WM_modalkeymap_get(keyconf, "View3D Dolly Modal");

	/* this function is called for each spacetype, only needs to add map once */
	if(keymap) return;

	keymap= WM_modalkeymap_add(keyconf, "View3D Dolly Modal", modal_items);

	/* items for modal map */
	WM_modalkeymap_add_item(keymap, MIDDLEMOUSE, KM_RELEASE, KM_ANY, 0, VIEW_MODAL_CONFIRM);
	WM_modalkeymap_add_item(keymap, ESCKEY, KM_PRESS, KM_ANY, 0, VIEW_MODAL_CONFIRM);

	/* disabled mode switching for now, can re-implement better, later on
	WM_modalkeymap_add_item(keymap, LEFTMOUSE, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
	WM_modalkeymap_add_item(keymap, LEFTCTRLKEY, KM_RELEASE, KM_ANY, 0, VIEWROT_MODAL_SWITCH_ROTATE);
	WM_modalkeymap_add_item(keymap, LEFTSHIFTKEY, KM_PRESS, KM_ANY, 0, VIEWROT_MODAL_SWITCH_MOVE);
	 */
	
	/* assign map to operators */
	WM_modalkeymap_assign(keymap, "VIEW3D_OT_dolly");
}

/* viewdolly_invoke() copied this function, changes here may apply there */
static int viewzoom_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod;

	/* makes op->customdata */
	viewops_data_create(C, op, event);
	vod= op->customdata;

	/* if one or the other zoom position aren't set, set from event */
	if (!RNA_property_is_set(op->ptr, "mx") || !RNA_property_is_set(op->ptr, "my")) {
		RNA_int_set(op->ptr, "mx", event->x);
		RNA_int_set(op->ptr, "my", event->y);
	}

	if(RNA_property_is_set(op->ptr, "delta")) {
		viewzoom_exec(C, op);
	}
	else {
		if (event->type == MOUSEZOOM) {
			/* Bypass Zoom invert flag for track pads (pass FALSE always) */

			if (U.uiflag & USER_ZOOM_HORIZ) {
				vod->origx = vod->oldx = event->x;
				viewzoom_apply(vod, event->prevx, event->prevy, USER_ZOOM_DOLLY, FALSE);
			}
			else {
				/* Set y move = x move as MOUSEZOOM uses only x axis to pass magnification value */
				vod->origy = vod->oldy = vod->origy + event->x - event->prevx;
				viewzoom_apply(vod, event->prevx, event->prevy, USER_ZOOM_DOLLY, FALSE);
			}
			ED_view3d_depth_tag_update(vod->rv3d);
			
			viewops_data_free(C, op);
			return OPERATOR_FINISHED;
		}
		else {
			if(U.viewzoom == USER_ZOOM_CONT) {
				/* needs a timer to continue redrawing */
				vod->timer= WM_event_add_timer(CTX_wm_manager(C), CTX_wm_window(C), TIMER, 0.01f);
				vod->timer_lastdraw= PIL_check_seconds_timer();
			}

			/* add temp handler */
			WM_event_add_modal_handler(C, op);

			return OPERATOR_RUNNING_MODAL;
		}
	}
	return OPERATOR_FINISHED;
}

static int viewzoom_cancel(bContext *C, wmOperator *op)
{
	viewops_data_free(C, op);

	return OPERATOR_CANCELLED;
}

void VIEW3D_OT_zoom(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Zoom View";
	ot->description = "Zoom in/out in the view";
	ot->idname= "VIEW3D_OT_zoom";

	/* api callbacks */
	ot->invoke= viewzoom_invoke;
	ot->exec= viewzoom_exec;
	ot->modal= viewzoom_modal;
	ot->poll= ED_operator_region_view3d_active;
	ot->cancel= viewzoom_cancel;

	/* flags */
	ot->flag= OPTYPE_BLOCKING|OPTYPE_GRAB_POINTER;

	RNA_def_int(ot->srna, "delta", 0, INT_MIN, INT_MAX, "Delta", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "mx", 0, 0, INT_MAX, "Zoom Position X", "", 0, INT_MAX);
	RNA_def_int(ot->srna, "my", 0, 0, INT_MAX, "Zoom Position Y", "", 0, INT_MAX);
}


/* ************************ viewdolly ******************************** */
static void view_dolly_mouseloc(ARegion *ar, float orig_ofs[3], float dvec[3], float dfac)
{
	RegionView3D *rv3d= ar->regiondata;
	madd_v3_v3v3fl(rv3d->ofs, orig_ofs, dvec, -(1.0f - dfac));
}

static void viewdolly_apply(ViewOpsData *vod, int x, int y, const short zoom_invert)
{
	float zfac=1.0;

	{
		float len1, len2;

		if (U.uiflag & USER_ZOOM_HORIZ) {
			len1 = (vod->ar->winrct.xmax - x) + 5;
			len2 = (vod->ar->winrct.xmax - vod->origx) + 5;
		}
		else {
			len1 = (vod->ar->winrct.ymax - y) + 5;
			len2 = (vod->ar->winrct.ymax - vod->origy) + 5;
		}
		if (zoom_invert)
			SWAP(float, len1, len2);

		zfac =  1.0f + ((len2 - len1) * 0.01f * vod->rv3d->dist);
	}

	if(zfac != 1.0f)
		view_dolly_mouseloc(vod->ar, vod->ofs, vod->mousevec, zfac);

	if(vod->rv3d->viewlock & RV3D_BOXVIEW)
		view3d_boxview_sync(vod->sa, vod->ar);

	ED_view3d_camera_lock_sync(vod->v3d, vod->rv3d);

	ED_region_tag_redraw(vod->ar);
}


static int viewdolly_modal(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod= op->customdata;
	short event_code= VIEW_PASS;

	/* execute the events */
	if(event->type==MOUSEMOVE) {
		event_code= VIEW_APPLY;
	}
	else if(event->type==EVT_MODAL_MAP) {
		switch (event->val) {
			case VIEW_MODAL_CONFIRM:
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_MOVE:
				WM_operator_name_call(C, "VIEW3D_OT_move", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
			case VIEWROT_MODAL_SWITCH_ROTATE:
				WM_operator_name_call(C, "VIEW3D_OT_rotate", WM_OP_INVOKE_DEFAULT, NULL);
				event_code= VIEW_CONFIRM;
				break;
		}
	}
	else if(event->type==vod->origkey && event->val==KM_RELEASE) {
		event_code= VIEW_CONFIRM;
	}

	if(event_code==VIEW_APPLY) {
		viewdolly_apply(vod, event->x, event->y, (U.uiflag & USER_ZOOM_INVERT) != 0);
	}
	else if (event_code==VIEW_CONFIRM) {
		ED_view3d_depth_tag_update(vod->rv3d);
		viewops_data_free(C, op);

		return OPERATOR_FINISHED;
	}

	return OPERATOR_RUNNING_MODAL;
}

static int viewdolly_exec(bContext *C, wmOperator *op)
{
	/* View3D *v3d; */
	RegionView3D *rv3d;
	ScrArea *sa;
	ARegion *ar;
	float mousevec[3];

	int delta= RNA_int_get(op->ptr, "delta");

	if(op->customdata) {
		ViewOpsData *vod= op->customdata;

		sa= vod->sa;
		ar= vod->ar;
		copy_v3_v3(mousevec, vod->mousevec);
	}
	else {
		sa= CTX_wm_area(C);
		ar= CTX_wm_region(C);
		negate_v3_v3(mousevec, ((RegionView3D *)ar->regiondata)->viewinv[2]);
		normalize_v3(mousevec);
	}

	/* v3d= sa->spacedata.first; */ /* UNUSED */
	rv3d= ar->regiondata;

	/* overwrite the mouse vector with the view direction (zoom into the center) */
	if((U.uiflag & USER_ZOOM_TO_MOUSEPOS) == 0) {
		normalize_v3_v3(mousevec, rv3d->viewinv[2]);
	}

	if(delta < 0) {
		view_dolly_mouseloc(ar, rv3d->ofs, mousevec, 1.2f);
	}
	else {
		view_dolly_mouseloc(ar, rv3d->ofs, mousevec, .83333f);
	}

	if(rv3d->viewlock & RV3D_BOXVIEW)
		view3d_boxview_sync(sa, ar);

	ED_view3d_depth_tag_update(rv3d);
	ED_region_tag_redraw(ar);

	viewops_data_free(C, op);

	return OPERATOR_FINISHED;
}

/* copied from viewzoom_invoke(), changes here may apply there */
static int viewdolly_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	ViewOpsData *vod;

	/* makes op->customdata */
	viewops_data_create(C, op, event);
	vod= op->customdata;

	/* if one or the other zoom position aren't set, set from event */
	if (!RNA_property_is_set(op->ptr, "mx") || !RNA_property_is_set(op->ptr, "my")) {
		RNA_int_set(op->ptr, "mx", event->x);
		RNA_int_set(op->ptr, "my", event->y);
	}

	if(RNA_property_is_set(op->ptr, "delta")) {
		viewdolly_exec(C, op);
	}
	else {
		/* overwrite the mouse vector with the view direction (zoom into the center) */
		if((U.uiflag & USER_ZOOM_TO_MOUSEPOS) == 0) {
			negate_v3_v3(vod->mousevec, vod->rv3d->viewinv[2]);
			normalize_v3(vod->mousevec);
		}

		if (event->type == MOUSEZOOM) {
			/* Bypass Zoom invert flag for track pads (pass FALSE always) */

			if (U.uiflag & USER_ZOOM_HORIZ) {
				vod->origx = vod->oldx = event->x;
				viewdolly_apply(vod, event->prevx, event->prevy, FALSE);
			}
			else {

				/* Set y move = x move as MOUSEZOOM uses only x axis to pass magnification value */
				vod->origy = vod->oldy = vod->origy + event->x - event->prevx;
				viewdolly_apply(vod, event->prevx, event->prevy, FALSE);
			}
			ED_view3d_depth_tag_update(vod->rv3d);

			viewops_data_free(C, op);
			return OPERATOR_FINISHED;
		}
		else {
			/* add temp handler */
			WM_event_add_modal_handler(C, op);

			return OPERATOR_RUNNING_MODAL;
		}
	}
	return OPERATOR_FINISHED;
}

/* like ED_operator_region_view3d_active but check its not in ortho view */
static int viewdolly_poll(bContext *C)
{
	RegionView3D *rv3d= CTX_wm_region_view3d(C);

	if(rv3d) {
		if (rv3d->persp == RV3D_PERSP) {
			return 1;
		}
		else {
			View3D *v3d= CTX_wm_view3d(C);
			if (ED_view3d_camera_lock_check(v3d, rv3d)) {
				return 1;
			}
		}
	}
	return 0;
}

static int viewdolly_cancel(bContext *C, wmOperator *op)
{
	viewops_data_free(C, op);

	return OPERATOR_CANCELLED;
}

void VIEW3D_OT_dolly(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Dolly view";
	ot->description = "Dolly in/out in the view";
	ot->idname= "VIEW3D_OT_dolly";

	/* api callbacks */
	ot->invoke= viewdolly_invoke;
	ot->exec= viewdolly_exec;
	ot->modal= viewdolly_modal;
	ot->poll= viewdolly_poll;
	ot->cancel= viewdolly_cancel;

	/* flags */
	ot->flag= OPTYPE_BLOCKING|OPTYPE_GRAB_POINTER;

	RNA_def_int(ot->srna, "delta", 0, INT_MIN, INT_MAX, "Delta", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "mx", 0, 0, INT_MAX, "Zoom Position X", "", 0, INT_MAX);
	RNA_def_int(ot->srna, "my", 0, 0, INT_MAX, "Zoom Position Y", "", 0, INT_MAX);
}



static int view3d_all_exec(bContext *C, wmOperator *op) /* was view3d_home() in 2.4x */
{
	ARegion *ar= CTX_wm_region(C);
	View3D *v3d = CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Scene *scene= CTX_data_scene(C);
	Base *base;
	float *curs;
	const short skip_camera= ED_view3d_camera_lock_check(v3d, rv3d);

	int center= RNA_boolean_get(op->ptr, "center");

	float size, min[3], max[3], afm[3];
	int ok= 1, onedone=0;

	if(center) {
		/* in 2.4x this also move the cursor to (0, 0, 0) (with shift+c). */
		curs= give_cursor(scene, v3d);
		zero_v3(min);
		zero_v3(max);
		zero_v3(curs);
	}
	else {
		INIT_MINMAX(min, max);
	}

	for(base= scene->base.first; base; base= base->next) {
		if(BASE_VISIBLE(v3d, base)) {
			onedone= 1;

			if(skip_camera && base->object == v3d->camera) {
				continue;
			}

			minmax_object(base->object, min, max);
		}
	}
	if(!onedone) {
		ED_region_tag_redraw(ar);
		/* TODO - should this be cancel?
		 * I think no, because we always move the cursor, with or without
		 * object, but in this case there is no change in the scene,
		 * only the cursor so I choice a ED_region_tag like
		 * smooth_view do for the center_cursor.
		 * See bug #22640
		 */
		return OPERATOR_FINISHED;
	}

	sub_v3_v3v3(afm, max, min);
	size= 0.7f*MAX3(afm[0], afm[1], afm[2]);
	if(size == 0.0f) ok= 0;

	if(ok) {
		float new_dist;
		float new_ofs[3];

		new_dist = size;
		new_ofs[0]= -(min[0]+max[0])/2.0f;
		new_ofs[1]= -(min[1]+max[1])/2.0f;
		new_ofs[2]= -(min[2]+max[2])/2.0f;

		// correction for window aspect ratio
		if(ar->winy>2 && ar->winx>2) {
			size= (float)ar->winx/(float)ar->winy;
			if(size < 1.0f) size= 1.0f/size;
			new_dist*= size;
		}

		if ((rv3d->persp==RV3D_CAMOB) && !ED_view3d_camera_lock_check(v3d, rv3d)) {
			rv3d->persp= RV3D_PERSP;
			smooth_view(C, v3d, ar, v3d->camera, NULL, new_ofs, NULL, &new_dist, NULL);
		}
		else {
			smooth_view(C, v3d, ar, NULL, NULL, new_ofs, NULL, &new_dist, NULL);
		}
	}
// XXX	BIF_view3d_previewrender_signal(curarea, PR_DBASE|PR_DISPRECT);

	WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, v3d);

	return OPERATOR_FINISHED;
}


void VIEW3D_OT_view_all(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View All";
	ot->description = "View all objects in scene";
	ot->idname= "VIEW3D_OT_view_all";

	/* api callbacks */
	ot->exec= view3d_all_exec;
	ot->poll= ED_operator_region_view3d_active;

	/* flags */
	ot->flag= 0;

	RNA_def_boolean(ot->srna, "center", 0, "Center", "");
}


static int viewselected_exec(bContext *C, wmOperator *UNUSED(op)) /* like a localview without local!, was centerview() in 2.4x */
{
	ARegion *ar= CTX_wm_region(C);
	View3D *v3d = CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Scene *scene= CTX_data_scene(C);
	Object *ob= OBACT;
	Object *obedit= CTX_data_edit_object(C);
	float size, min[3], max[3], afm[3];
	int ok=0, ok_dist=1;
	const short skip_camera= ED_view3d_camera_lock_check(v3d, rv3d);

	/* SMOOTHVIEW */
	float new_ofs[3];
	float new_dist;

	INIT_MINMAX(min, max);

	if (ob && ob->mode & OB_MODE_WEIGHT_PAINT) {
		/* hardcoded exception, we look for the one selected armature */
		/* this is weak code this way, we should make a generic active/selection callback interface once... */
		Base *base;
		for(base=scene->base.first; base; base= base->next) {
			if(TESTBASELIB(v3d, base)) {
				if(base->object->type==OB_ARMATURE)
					if(base->object->mode & OB_MODE_POSE)
						break;
			}
		}
		if(base)
			ob= base->object;
	}


	if(obedit) {
		ok = minmax_verts(obedit, min, max);	/* only selected */
	}
	else if(ob && (ob->mode & OB_MODE_POSE)) {
		if(ob->pose) {
			bArmature *arm= ob->data;
			bPoseChannel *pchan;
			float vec[3];

			for(pchan= ob->pose->chanbase.first; pchan; pchan= pchan->next) {
				if(pchan->bone->flag & BONE_SELECTED) {
					if(pchan->bone->layer & arm->layer) {
						bPoseChannel *pchan_tx= pchan->custom_tx ? pchan->custom_tx : pchan;
						ok= 1;
						mul_v3_m4v3(vec, ob->obmat, pchan_tx->pose_head);
						DO_MINMAX(vec, min, max);
						mul_v3_m4v3(vec, ob->obmat, pchan_tx->pose_tail);
						DO_MINMAX(vec, min, max);
					}
				}
			}
		}
	}
	else if (paint_facesel_test(ob)) {
		ok= paintface_minmax(ob, min, max);
	}
	else if (ob && (ob->mode & OB_MODE_PARTICLE_EDIT)) {
		ok= PE_minmax(scene, min, max);
	}
	else {
		Base *base;
		for(base= FIRSTBASE; base; base = base->next) {
			if(TESTBASE(v3d, base))  {

				if(skip_camera && base->object == v3d->camera) {
					continue;
				}

				/* account for duplis */
				if (minmax_object_duplis(scene, base->object, min, max)==0)
					minmax_object(base->object, min, max); /* use if duplis not found */

				ok= 1;
			}
		}
	}

	if(ok==0) return OPERATOR_FINISHED;

	sub_v3_v3v3(afm, max, min);
	size= MAX3(afm[0], afm[1], afm[2]);

	if(!rv3d->is_persp) {
		if(size < 0.0001f) { /* if its a sinble point. dont even re-scale */
			ok_dist= 0;
		}
		else {
			/* perspective should be a bit farther away to look nice */
			size*= 0.7f;
		}
	}
	else {
		if(size <= v3d->near*1.5f) {
			size= v3d->near*1.5f;
		}
	}

	add_v3_v3v3(new_ofs, min, max);
	mul_v3_fl(new_ofs, -0.5f);

	new_dist = size;

	/* correction for window aspect ratio */
	if(ar->winy>2 && ar->winx>2) {
		size= (float)ar->winx/(float)ar->winy;
		if(size<1.0f) size= 1.0f/size;
		new_dist*= size;
	}

	if (rv3d->persp==RV3D_CAMOB && !ED_view3d_camera_lock_check(v3d, rv3d)) {
		rv3d->persp= RV3D_PERSP;
		smooth_view(C, v3d, ar, v3d->camera, NULL, new_ofs, NULL, &new_dist, NULL);
	}
	else {
		smooth_view(C, v3d, ar, NULL, NULL, new_ofs, NULL, ok_dist ? &new_dist : NULL, NULL);
	}

	/* smooth view does viewlock RV3D_BOXVIEW copy */
	
// XXX	BIF_view3d_previewrender_signal(curarea, PR_DBASE|PR_DISPRECT);

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_view_selected(wmOperatorType *ot)
{

	/* identifiers */
	ot->name= "View Selected";
	ot->description = "Move the view to the selection center";
	ot->idname= "VIEW3D_OT_view_selected";

	/* api callbacks */
	ot->exec= viewselected_exec;
	ot->poll= ED_operator_region_view3d_active;

	/* flags */
	ot->flag= 0;
}

static int viewcenter_cursor_exec(bContext *C, wmOperator *UNUSED(op))
{
	View3D *v3d = CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Scene *scene= CTX_data_scene(C);
	
	if (rv3d) {
		ARegion *ar= CTX_wm_region(C);

		/* non camera center */
		float new_ofs[3];
		negate_v3_v3(new_ofs, give_cursor(scene, v3d));
		smooth_view(C, v3d, ar, NULL, NULL, new_ofs, NULL, NULL, NULL);
		
		/* smooth view does viewlock RV3D_BOXVIEW copy */
	}
	
	return OPERATOR_FINISHED;
}

void VIEW3D_OT_view_center_cursor(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Center View to Cursor";
	ot->description= "Centers the view so that the cursor is in the middle of the view";
	ot->idname= "VIEW3D_OT_view_center_cursor";
	
	/* api callbacks */
	ot->exec= viewcenter_cursor_exec;
	ot->poll= ED_operator_view3d_active;
	
	/* flags */
	ot->flag= 0;
}

static int view3d_center_camera_exec(bContext *C, wmOperator *UNUSED(op)) /* was view3d_home() in 2.4x */
{
	ARegion *ar= CTX_wm_region(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Scene *scene= CTX_data_scene(C);
	float xfac, yfac;
	float size[2];

	rv3d->camdx= rv3d->camdy= 0.0f;

	view3d_viewborder_size_get(scene, ar, size);

	/* 4px is just a little room from the edge of the area */
	xfac= (float)ar->winx / (float)(size[0] + 4);
	yfac= (float)ar->winy / (float)(size[1] + 4);

	rv3d->camzoom= BKE_screen_view3d_zoom_from_fac(MIN2(xfac, yfac));
	CLAMP(rv3d->camzoom, RV3D_CAMZOOM_MIN, RV3D_CAMZOOM_MAX);

	WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, CTX_wm_view3d(C));

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_view_center_camera(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Camera Center";
	ot->description = "Center the camera view";
	ot->idname= "VIEW3D_OT_view_center_camera";

	/* api callbacks */
	ot->exec= view3d_center_camera_exec;
	ot->poll= view3d_camera_active_poll;

	/* flags */
	ot->flag= 0;
}

/* ********************* Set render border operator ****************** */

static int render_border_exec(bContext *C, wmOperator *op)
{
	View3D *v3d = CTX_wm_view3d(C);
	ARegion *ar= CTX_wm_region(C);
	RegionView3D *rv3d= ED_view3d_context_rv3d(C);
	Scene *scene= CTX_data_scene(C);

	rcti rect;
	rctf vb;

	/* get border select values using rna */
	rect.xmin= RNA_int_get(op->ptr, "xmin");
	rect.ymin= RNA_int_get(op->ptr, "ymin");
	rect.xmax= RNA_int_get(op->ptr, "xmax");
	rect.ymax= RNA_int_get(op->ptr, "ymax");

	/* calculate range */
	ED_view3d_calc_camera_border(scene, ar, v3d, rv3d, &vb, FALSE);

	scene->r.border.xmin= ((float)rect.xmin-vb.xmin)/(vb.xmax-vb.xmin);
	scene->r.border.ymin= ((float)rect.ymin-vb.ymin)/(vb.ymax-vb.ymin);
	scene->r.border.xmax= ((float)rect.xmax-vb.xmin)/(vb.xmax-vb.xmin);
	scene->r.border.ymax= ((float)rect.ymax-vb.ymin)/(vb.ymax-vb.ymin);

	/* actually set border */
	CLAMP(scene->r.border.xmin, 0.0f, 1.0f);
	CLAMP(scene->r.border.ymin, 0.0f, 1.0f);
	CLAMP(scene->r.border.xmax, 0.0f, 1.0f);
	CLAMP(scene->r.border.ymax, 0.0f, 1.0f);

	/* drawing a border surrounding the entire camera view switches off border rendering
	 * or the border covers no pixels */
	if ((scene->r.border.xmin <= 0.0f && scene->r.border.xmax >= 1.0f &&
		scene->r.border.ymin <= 0.0f && scene->r.border.ymax >= 1.0f) ||
	   (scene->r.border.xmin == scene->r.border.xmax ||
		scene->r.border.ymin == scene->r.border.ymax ))
	{
		scene->r.mode &= ~R_BORDER;
	} else {
		scene->r.mode |= R_BORDER;
	}
	
	WM_event_add_notifier(C, NC_SCENE|ND_RENDER_OPTIONS, NULL);

	return OPERATOR_FINISHED;

}

void VIEW3D_OT_render_border(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Set Render Border";
	ot->description = "Set the boundaries of the border render and enables border render ";
	ot->idname= "VIEW3D_OT_render_border";

	/* api callbacks */
	ot->invoke= WM_border_select_invoke;
	ot->exec= render_border_exec;
	ot->modal= WM_border_select_modal;
	ot->cancel= WM_border_select_cancel;

	ot->poll= view3d_camera_active_poll;

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

	/* rna */
	RNA_def_int(ot->srna, "xmin", 0, INT_MIN, INT_MAX, "X Min", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "xmax", 0, INT_MIN, INT_MAX, "X Max", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "ymin", 0, INT_MIN, INT_MAX, "Y Min", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "ymax", 0, INT_MIN, INT_MAX, "Y Max", "", INT_MIN, INT_MAX);

}
/* ********************* Border Zoom operator ****************** */

static int view3d_zoom_border_exec(bContext *C, wmOperator *op)
{
	ARegion *ar= CTX_wm_region(C);
	View3D *v3d = CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	Scene *scene= CTX_data_scene(C);

	/* Zooms in on a border drawn by the user */
	rcti rect;
	float dvec[3], vb[2], xscale, yscale, scale;

	/* SMOOTHVIEW */
	float new_dist;
	float new_ofs[3];

	/* ZBuffer depth vars */
	bglMats mats;
	float depth_close= FLT_MAX;
	double cent[2],  p[3];

	/* note; otherwise opengl won't work */
	view3d_operator_needs_opengl(C);

	/* get border select values using rna */
	rect.xmin= RNA_int_get(op->ptr, "xmin");
	rect.ymin= RNA_int_get(op->ptr, "ymin");
	rect.xmax= RNA_int_get(op->ptr, "xmax");
	rect.ymax= RNA_int_get(op->ptr, "ymax");

	/* Get Z Depths, needed for perspective, nice for ortho */
	bgl_get_mats(&mats);
	draw_depth(scene, ar, v3d, NULL);
	
	{
		/* avoid allocating the whole depth buffer */
		ViewDepths depth_temp= {0};

		/* avoid view3d_update_depths() for speed. */
		view3d_update_depths_rect(ar, &depth_temp, &rect);
	
		/* find the closest Z pixel */
		depth_close= view3d_depth_near(&depth_temp);
	
		MEM_freeN(depth_temp.depths);
	}

	cent[0] = (((double)rect.xmin)+((double)rect.xmax)) / 2;
	cent[1] = (((double)rect.ymin)+((double)rect.ymax)) / 2;

	if (rv3d->is_persp) {
		double p_corner[3];

		/* no depths to use, we cant do anything! */
		if (depth_close==FLT_MAX){
			BKE_report(op->reports, RPT_ERROR, "Depth Too Large");
			return OPERATOR_CANCELLED;
		}
		/* convert border to 3d coordinates */
		if ((	!gluUnProject(cent[0], cent[1], depth_close, mats.modelview, mats.projection, (GLint *)mats.viewport, &p[0], &p[1], &p[2])) ||
			(	!gluUnProject((double)rect.xmin, (double)rect.ymin, depth_close, mats.modelview, mats.projection, (GLint *)mats.viewport, &p_corner[0], &p_corner[1], &p_corner[2])))
			return OPERATOR_CANCELLED;

		dvec[0] = p[0]-p_corner[0];
		dvec[1] = p[1]-p_corner[1];
		dvec[2] = p[2]-p_corner[2];

		new_dist = len_v3(dvec);
		if(new_dist <= v3d->near * 1.5f) new_dist= v3d->near * 1.5f;

		new_ofs[0] = -p[0];
		new_ofs[1] = -p[1];
		new_ofs[2] = -p[2];

	} else { /* othographic */
		/* find the current window width and height */
		vb[0] = ar->winx;
		vb[1] = ar->winy;

		new_dist = rv3d->dist;

		/* convert the drawn rectangle into 3d space */
		if (depth_close!=FLT_MAX && gluUnProject(cent[0], cent[1], depth_close, mats.modelview, mats.projection, (GLint *)mats.viewport, &p[0], &p[1], &p[2])) {
			new_ofs[0] = -p[0];
			new_ofs[1] = -p[1];
			new_ofs[2] = -p[2];
		}
		else {
			float mval_f[2];
			/* We cant use the depth, fallback to the old way that dosnt set the center depth */
			copy_v3_v3(new_ofs, rv3d->ofs);

			initgrabz(rv3d, -new_ofs[0], -new_ofs[1], -new_ofs[2]);

			mval_f[0]= (rect.xmin + rect.xmax - vb[0]) / 2.0f;
			mval_f[1]= (rect.ymin + rect.ymax - vb[1]) / 2.0f;
			ED_view3d_win_to_delta(ar, mval_f, dvec);
			/* center the view to the center of the rectangle */
			sub_v3_v3(new_ofs, dvec);
		}

		/* work out the ratios, so that everything selected fits when we zoom */
		xscale = ((rect.xmax-rect.xmin)/vb[0]);
		yscale = ((rect.ymax-rect.ymin)/vb[1]);
		scale = (xscale >= yscale)?xscale:yscale;

		/* zoom in as required, or as far as we can go */
		new_dist = ((new_dist*scale) >= 0.001f * v3d->grid)? new_dist*scale:0.001f * v3d->grid;
	}

	smooth_view(C, v3d, ar, NULL, NULL, new_ofs, NULL, &new_dist, NULL);

	if(rv3d->viewlock & RV3D_BOXVIEW)
		view3d_boxview_sync(CTX_wm_area(C), ar);

	return OPERATOR_FINISHED;
}

static int view3d_zoom_border_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	View3D *v3d= CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);

	/* if in camera view do not exec the operator so we do not conflict with set render border*/
	if ((rv3d->persp != RV3D_CAMOB) || ED_view3d_camera_lock_check(v3d, rv3d))
		return WM_border_select_invoke(C, op, event);
	else
		return OPERATOR_PASS_THROUGH;
}

void VIEW3D_OT_zoom_border(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Border Zoom";
	ot->description = "Zoom in the view to the nearest object contained in the border";
	ot->idname= "VIEW3D_OT_zoom_border";

	/* api callbacks */
	ot->invoke= view3d_zoom_border_invoke;
	ot->exec= view3d_zoom_border_exec;
	ot->modal= WM_border_select_modal;
	ot->cancel= WM_border_select_cancel;

	ot->poll= ED_operator_region_view3d_active;

	/* flags */
	ot->flag= 0;

	/* rna */
	RNA_def_int(ot->srna, "xmin", 0, INT_MIN, INT_MAX, "X Min", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "xmax", 0, INT_MIN, INT_MAX, "X Max", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "ymin", 0, INT_MIN, INT_MAX, "Y Min", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "ymax", 0, INT_MIN, INT_MAX, "Y Max", "", INT_MIN, INT_MAX);

}

/* sets the view to 1:1 camera/render-pixel */
static void view3d_set_1_to_1_viewborder(Scene *scene, ARegion *ar)
{
	RegionView3D *rv3d= ar->regiondata;
	float size[2];
	int im_width= (scene->r.size*scene->r.xsch)/100;
	
	view3d_viewborder_size_get(scene, ar, size);

	rv3d->camzoom= BKE_screen_view3d_zoom_from_fac((float)im_width/size[0]);
	CLAMP(rv3d->camzoom, RV3D_CAMZOOM_MIN, RV3D_CAMZOOM_MAX);
}

static int view3d_zoom_1_to_1_camera_exec(bContext *C, wmOperator *UNUSED(op))
{
	Scene *scene= CTX_data_scene(C);
	ARegion *ar= CTX_wm_region(C);

	view3d_set_1_to_1_viewborder(scene, ar);

	WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, CTX_wm_view3d(C));

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_zoom_camera_1_to_1(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Zoom Camera 1:1";
	ot->description = "Match the camera to 1:1 to the render output";
	ot->idname= "VIEW3D_OT_zoom_camera_1_to_1";

	/* api callbacks */
	ot->exec= view3d_zoom_1_to_1_camera_exec;
	ot->poll= view3d_camera_active_poll;

	/* flags */
	ot->flag= 0;
}

/* ********************* Changing view operator ****************** */

static EnumPropertyItem prop_view_items[] = {
	{RV3D_VIEW_FRONT, "FRONT", 0, "Front", "View From the Front"},
	{RV3D_VIEW_BACK, "BACK", 0, "Back", "View From the Back"},
	{RV3D_VIEW_LEFT, "LEFT", 0, "Left", "View From the Left"},
	{RV3D_VIEW_RIGHT, "RIGHT", 0, "Right", "View From the Right"},
	{RV3D_VIEW_TOP, "TOP", 0, "Top", "View From the Top"},
	{RV3D_VIEW_BOTTOM, "BOTTOM", 0, "Bottom", "View From the Bottom"},
	{RV3D_VIEW_CAMERA, "CAMERA", 0, "Camera", "View From the active amera"},
	{0, NULL, 0, NULL, NULL}};


/* would like to make this a generic function - outside of transform */

static void axis_set_view(bContext *C, View3D *v3d, ARegion *ar, float q1, float q2, float q3, float q4, short view, int perspo, int align_active)
{
	RegionView3D *rv3d= ar->regiondata; /* no NULL check is needed, poll checks */
	float new_quat[4];

	new_quat[0]= q1; new_quat[1]= q2;
	new_quat[2]= q3; new_quat[3]= q4;
	normalize_qt(new_quat);

	if(align_active) {
		/* align to active object */
		Object *obact= CTX_data_active_object(C);
		if (obact==NULL) {
			/* no active object, ignore this option */
			align_active= FALSE;
		}
		else {
			float obact_quat[4];
			float twmat[3][3];

			/* same as transform manipulator when normal is set */
			ED_getTransformOrientationMatrix(C, twmat, FALSE);

			mat3_to_quat( obact_quat,twmat);
			invert_qt(obact_quat);
			mul_qt_qtqt(new_quat, new_quat, obact_quat);

			rv3d->view= view= RV3D_VIEW_USER;
		}
	}

	if(align_active==FALSE) {
		/* normal operation */
		if(rv3d->viewlock) {
			/* only pass on if */
			if(rv3d->view==RV3D_VIEW_FRONT && view==RV3D_VIEW_BACK);
			else if(rv3d->view==RV3D_VIEW_BACK && view==RV3D_VIEW_FRONT);
			else if(rv3d->view==RV3D_VIEW_RIGHT && view==RV3D_VIEW_LEFT);
			else if(rv3d->view==RV3D_VIEW_LEFT && view==RV3D_VIEW_RIGHT);
			else if(rv3d->view==RV3D_VIEW_BOTTOM && view==RV3D_VIEW_TOP);
			else if(rv3d->view==RV3D_VIEW_TOP && view==RV3D_VIEW_BOTTOM);
			else return;
		}

		rv3d->view= view;
	}

	if(rv3d->viewlock) {
		ED_region_tag_redraw(ar);
		return;
	}

	if (rv3d->persp==RV3D_CAMOB && v3d->camera) {

		if (U.uiflag & USER_AUTOPERSP) rv3d->persp= view ? RV3D_ORTHO : RV3D_PERSP;
		else if(rv3d->persp==RV3D_CAMOB) rv3d->persp= perspo;

		smooth_view(C, v3d, ar, v3d->camera, NULL, rv3d->ofs, new_quat, NULL, NULL);
	}
	else {

		if (U.uiflag & USER_AUTOPERSP) rv3d->persp= view ? RV3D_ORTHO : RV3D_PERSP;
		else if(rv3d->persp==RV3D_CAMOB) rv3d->persp= perspo;

		smooth_view(C, v3d, ar, NULL, NULL, NULL, new_quat, NULL, NULL);
	}

}

static int viewnumpad_exec(bContext *C, wmOperator *op)
{
	View3D *v3d = CTX_wm_view3d(C);
	ARegion *ar= ED_view3d_context_region_unlock(C);
	RegionView3D *rv3d= ar->regiondata; /* no NULL check is needed, poll checks */
	Scene *scene= CTX_data_scene(C);
	static int perspo=RV3D_PERSP;
	int viewnum, align_active, nextperspo;

	viewnum = RNA_enum_get(op->ptr, "type");
	align_active = RNA_boolean_get(op->ptr, "align_active");

	/* set this to zero, gets handled in axis_set_view */
	if(rv3d->viewlock)
		align_active= 0;

	/* Use this to test if we started out with a camera */

	if (rv3d->persp == RV3D_CAMOB) {
		nextperspo= rv3d->lpersp;
	} else {
		nextperspo= perspo;
	}

	switch (viewnum) {
		case RV3D_VIEW_BOTTOM :
			axis_set_view(C, v3d, ar, 0.0, -1.0, 0.0, 0.0, viewnum, nextperspo, align_active);
			break;

		case RV3D_VIEW_BACK:
			axis_set_view(C, v3d, ar, 0.0, 0.0, (float)-cos(M_PI/4.0), (float)-cos(M_PI/4.0), viewnum, nextperspo, align_active);
			break;

		case RV3D_VIEW_LEFT:
			axis_set_view(C, v3d, ar, 0.5, -0.5, 0.5, 0.5, viewnum, nextperspo, align_active);
			break;

		case RV3D_VIEW_TOP:
			axis_set_view(C, v3d, ar, 1.0, 0.0, 0.0, 0.0, viewnum, nextperspo, align_active);
			break;

		case RV3D_VIEW_FRONT:
			axis_set_view(C, v3d, ar, (float)cos(M_PI/4.0), (float)-sin(M_PI/4.0), 0.0, 0.0, viewnum, nextperspo, align_active);
			break;

		case RV3D_VIEW_RIGHT:
			axis_set_view(C, v3d, ar, 0.5, -0.5, -0.5, -0.5, viewnum, nextperspo, align_active);
			break;

		case RV3D_VIEW_CAMERA:
			if(rv3d->viewlock==0) {
				/* lastview -  */

				if(rv3d->persp != RV3D_CAMOB) {
					Object *ob= OBACT;

					if (!rv3d->smooth_timer) {
						/* store settings of current view before allowing overwriting with camera view
						 * only if we're not currently in a view transition */
						copy_qt_qt(rv3d->lviewquat, rv3d->viewquat);
						rv3d->lview= rv3d->view;
						rv3d->lpersp= rv3d->persp;
					}

	#if 0
					if(G.qual==LR_ALTKEY) {
						if(oldcamera && is_an_active_object(oldcamera)) {
							v3d->camera= oldcamera;
						}
						handle_view3d_lock();
					}
	#endif
					
					/* first get the default camera for the view lock type */
					if(v3d->scenelock) {
						/* sets the camera view if available */
						v3d->camera= scene->camera;						
					}
					else {
						/* use scene camera if one is not set (even though we're unlocked) */
						if(v3d->camera==NULL) {
							v3d->camera= scene->camera;
						}
					}

					/* if the camera isnt found, check a number of options */
					if(v3d->camera==NULL && ob && ob->type==OB_CAMERA)
						v3d->camera= ob;
					
					if(v3d->camera==NULL)
						v3d->camera= scene_find_camera(scene);		

					/* couldnt find any useful camera, bail out */
					if(v3d->camera==NULL)
						return OPERATOR_CANCELLED;
					
					/* important these dont get out of sync for locked scenes */
					if(v3d->scenelock)
						scene->camera= v3d->camera;

					/* finally do snazzy view zooming */
					rv3d->persp= RV3D_CAMOB;
					smooth_view(C, v3d, ar, NULL, v3d->camera, rv3d->ofs, rv3d->viewquat, &rv3d->dist, &v3d->lens);

				}
				else{
					/* return to settings of last view */
					/* does smooth_view too */
					axis_set_view(C, v3d, ar, rv3d->lviewquat[0], rv3d->lviewquat[1], rv3d->lviewquat[2], rv3d->lviewquat[3], rv3d->lview, rv3d->lpersp, 0);
				}
			}
			break;

		default :
			break;
	}

	if(rv3d->persp != RV3D_CAMOB) perspo= rv3d->persp;

	return OPERATOR_FINISHED;
}


void VIEW3D_OT_viewnumpad(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View numpad";
	ot->description = "Set the view";
	ot->idname= "VIEW3D_OT_viewnumpad";

	/* api callbacks */
	ot->exec= viewnumpad_exec;
	ot->poll= ED_operator_rv3d_unlock_poll;

	/* flags */
	ot->flag= 0;

	RNA_def_enum(ot->srna, "type", prop_view_items, 0, "View", "The Type of view");
	RNA_def_boolean(ot->srna, "align_active", 0, "Align Active", "Align to the active objects axis");
}

static EnumPropertyItem prop_view_orbit_items[] = {
	{V3D_VIEW_STEPLEFT, "ORBITLEFT", 0, "Orbit Left", "Orbit the view around to the Left"},
	{V3D_VIEW_STEPRIGHT, "ORBITRIGHT", 0, "Orbit Right", "Orbit the view around to the Right"},
	{V3D_VIEW_STEPUP, "ORBITUP", 0, "Orbit Up", "Orbit the view Up"},
	{V3D_VIEW_STEPDOWN, "ORBITDOWN", 0, "Orbit Down", "Orbit the view Down"},
	{0, NULL, 0, NULL, NULL}};

static int vieworbit_exec(bContext *C, wmOperator *op)
{
	View3D *v3d= CTX_wm_view3d(C);
	ARegion *ar= ED_view3d_context_region_unlock(C);
	RegionView3D *rv3d= ar->regiondata; /* no NULL check is needed, poll checks */
	float phi, q1[4], new_quat[4];
	int orbitdir;

	orbitdir = RNA_enum_get(op->ptr, "type");

	if(rv3d->viewlock==0) {
		if((rv3d->persp != RV3D_CAMOB) || ED_view3d_camera_lock_check(v3d, rv3d)) {
			if(orbitdir == V3D_VIEW_STEPLEFT || orbitdir == V3D_VIEW_STEPRIGHT) {
				float si;
				/* z-axis */
				phi= (float)(M_PI/360.0)*U.pad_rot_angle;
				if(orbitdir == V3D_VIEW_STEPRIGHT) phi= -phi;
				si= (float)sin(phi);
				q1[0]= (float)cos(phi);
				q1[1]= q1[2]= 0.0;
				q1[3]= si;
				mul_qt_qtqt(new_quat, rv3d->viewquat, q1);
				rv3d->view= RV3D_VIEW_USER;
			}
			else if(orbitdir == V3D_VIEW_STEPDOWN || orbitdir == V3D_VIEW_STEPUP) {
				/* horizontal axis */
				copy_v3_v3(q1+1, rv3d->viewinv[0]);

				normalize_v3(q1+1);
				phi= (float)(M_PI/360.0)*U.pad_rot_angle;
				if(orbitdir == V3D_VIEW_STEPDOWN) phi= -phi;
				q1[0]= (float)cos(phi);
				mul_v3_fl(q1+1, sin(phi));
				mul_qt_qtqt(new_quat, rv3d->viewquat, q1);
				rv3d->view= RV3D_VIEW_USER;
			}

			smooth_view(C, CTX_wm_view3d(C), ar, NULL, NULL, NULL, new_quat, NULL, NULL);
		}
	}

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_view_orbit(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Orbit";
	ot->description = "Orbit the view";
	ot->idname= "VIEW3D_OT_view_orbit";

	/* api callbacks */
	ot->exec= vieworbit_exec;
	ot->poll= ED_operator_rv3d_unlock_poll;

	/* flags */
	ot->flag= 0;
	RNA_def_enum(ot->srna, "type", prop_view_orbit_items, 0, "Orbit", "Direction of View Orbit");
}

static EnumPropertyItem prop_view_pan_items[] = {
	{V3D_VIEW_PANLEFT, "PANLEFT", 0, "Pan Left", "Pan the view to the Left"},
	{V3D_VIEW_PANRIGHT, "PANRIGHT", 0, "Pan Right", "Pan the view to the Right"},
	{V3D_VIEW_PANUP, "PANUP", 0, "Pan Up", "Pan the view Up"},
	{V3D_VIEW_PANDOWN, "PANDOWN", 0, "Pan Down", "Pan the view Down"},
	{0, NULL, 0, NULL, NULL}};

static int viewpan_exec(bContext *C, wmOperator *op)
{
	ARegion *ar= CTX_wm_region(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	float vec[3];
	float mval_f[2]= {0.0f, 0.0f};
	int pandir;

	pandir = RNA_enum_get(op->ptr, "type");

	initgrabz(rv3d, 0.0, 0.0, 0.0);
	if(pandir == V3D_VIEW_PANRIGHT)		{ mval_f[0]= -32.0f; ED_view3d_win_to_delta(ar, mval_f, vec); }
	else if(pandir == V3D_VIEW_PANLEFT)	{ mval_f[0]=  32.0f; ED_view3d_win_to_delta(ar, mval_f, vec); }
	else if(pandir == V3D_VIEW_PANUP)	{ mval_f[1]= -25.0f; ED_view3d_win_to_delta(ar, mval_f, vec); }
	else if(pandir == V3D_VIEW_PANDOWN)	{ mval_f[1]=  25.0f; ED_view3d_win_to_delta(ar, mval_f, vec); }
	add_v3_v3(rv3d->ofs, vec);

	if(rv3d->viewlock & RV3D_BOXVIEW)
		view3d_boxview_sync(CTX_wm_area(C), ar);

	ED_region_tag_redraw(ar);

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_view_pan(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Pan";
	ot->description = "Pan the view";
	ot->idname= "VIEW3D_OT_view_pan";

	/* api callbacks */
	ot->exec= viewpan_exec;
	ot->poll= ED_operator_region_view3d_active;

	/* flags */
	ot->flag= 0;
	RNA_def_enum(ot->srna, "type", prop_view_pan_items, 0, "Pan", "Direction of View Pan");
}

static int viewpersportho_exec(bContext *C, wmOperator *UNUSED(op))
{
	ARegion *ar= ED_view3d_context_region_unlock(C);
	RegionView3D *rv3d= ar->regiondata; /* no NULL check is needed, poll checks */

	if(rv3d->viewlock==0) {
		if(rv3d->persp!=RV3D_ORTHO)
			rv3d->persp=RV3D_ORTHO;
		else rv3d->persp=RV3D_PERSP;
		ED_region_tag_redraw(ar);
	}

	return OPERATOR_FINISHED;

}

void VIEW3D_OT_view_persportho(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "View Persp/Ortho";
	ot->description = "Switch the current view from perspective/orthographic";
	ot->idname= "VIEW3D_OT_view_persportho";

	/* api callbacks */
	ot->exec= viewpersportho_exec;
	ot->poll= ED_operator_rv3d_unlock_poll;

	/* flags */
	ot->flag= 0;
}


/* ******************** add background image operator **************** */

static BGpic *background_image_add(bContext *C)
{
	View3D *v3d= CTX_wm_view3d(C);
	
	BGpic *bgpic= MEM_callocN(sizeof(BGpic), "Background Image");
	bgpic->size= 5.0;
	bgpic->blend= 0.5;
	bgpic->iuser.fie_ima= 2;
	bgpic->iuser.ok= 1;
	bgpic->view= 0; /* 0 for all */
	
	BLI_addtail(&v3d->bgpicbase, bgpic);
	
	return bgpic;
}

static int background_image_add_exec(bContext *C, wmOperator *UNUSED(op))
{
	background_image_add(C);

	return OPERATOR_FINISHED;
}

static int background_image_add_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
	View3D *v3d= CTX_wm_view3d(C);
	Image *ima= NULL;
	BGpic *bgpic;
	char name[32];
	
	/* check input variables */
	if(RNA_property_is_set(op->ptr, "filepath")) {
		char path[FILE_MAX];
		
		RNA_string_get(op->ptr, "filepath", path);
		ima= BKE_add_image_file(path);
	}
	else if(RNA_property_is_set(op->ptr, "name")) {
		RNA_string_get(op->ptr, "name", name);
		ima= (Image *)find_id("IM", name);
	}
	
	bgpic = background_image_add(C);
	
	if (ima) {
		bgpic->ima = ima;
		
		if(ima->id.us==0) id_us_plus(&ima->id);
		else id_lib_extern(&ima->id);
		
		if (!(v3d->flag & V3D_DISPBGPICS))
			v3d->flag |= V3D_DISPBGPICS;
	}
	
	WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, v3d);
	
	return OPERATOR_FINISHED;
}

void VIEW3D_OT_background_image_add(wmOperatorType *ot)
{
	/* identifiers */
	ot->name   = "Add Background Image";
	ot->description= "Add a new background image";
	ot->idname = "VIEW3D_OT_background_image_add";

	/* api callbacks */
	ot->invoke = background_image_add_invoke;
	ot->exec   = background_image_add_exec;
	ot->poll   = ED_operator_view3d_active;

	/* flags */
	ot->flag   = 0;
	
	/* properties */
	RNA_def_string(ot->srna, "name", "Image", 24, "Name", "Image name to assign.");
	RNA_def_string(ot->srna, "filepath", "Path", FILE_MAX, "Filepath", "Path to image file");
}


/* ***** remove image operator ******* */
static int background_image_remove_exec(bContext *C, wmOperator *op)
{
	View3D *vd = CTX_wm_view3d(C);
	int index = RNA_int_get(op->ptr, "index");
	BGpic *bgpic_rem= BLI_findlink(&vd->bgpicbase, index);

	if(bgpic_rem) {
		BLI_remlink(&vd->bgpicbase, bgpic_rem);
		if(bgpic_rem->ima) bgpic_rem->ima->id.us--;
		MEM_freeN(bgpic_rem);
		WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, vd);
		return OPERATOR_FINISHED;
	}
	else {
		return OPERATOR_CANCELLED;
	}

}

void VIEW3D_OT_background_image_remove(wmOperatorType *ot)
{
	/* identifiers */
	ot->name   = "Remove Background Image";
	ot->description= "Remove a background image from the 3D view";
	ot->idname = "VIEW3D_OT_background_image_remove";

	/* api callbacks */
	ot->exec   = background_image_remove_exec;
	ot->poll   = ED_operator_view3d_active;

	/* flags */
	ot->flag   = 0;

	RNA_def_int(ot->srna, "index", 0, 0, INT_MAX, "Index", "Background image index to remove ", 0, INT_MAX);
}

/* ********************* set clipping operator ****************** */

static void calc_clipping_plane(float clip[6][4], BoundBox *clipbb)
{
	int val;

	for(val=0; val<4; val++) {

		normal_tri_v3( clip[val],clipbb->vec[val], clipbb->vec[val==3?0:val+1], clipbb->vec[val+4]);

		clip[val][3]=
			- clip[val][0]*clipbb->vec[val][0]
			- clip[val][1]*clipbb->vec[val][1]
			- clip[val][2]*clipbb->vec[val][2];
	}
}

static void calc_local_clipping(float clip_local[][4], BoundBox *clipbb, float mat[][4])
{
	BoundBox clipbb_local;
	float imat[4][4];
	int i;

	invert_m4_m4(imat, mat);

	for(i=0; i<8; i++) {
		mul_v3_m4v3(clipbb_local.vec[i], imat, clipbb->vec[i]);
	}

	calc_clipping_plane(clip_local, &clipbb_local);
}

void ED_view3d_local_clipping(RegionView3D *rv3d, float mat[][4])
{
	if(rv3d->rflag & RV3D_CLIPPING)
		calc_local_clipping(rv3d->clip_local, rv3d->clipbb, mat);
}

static int view3d_clipping_exec(bContext *C, wmOperator *op)
{
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	ViewContext vc;
	bglMats mats;
	rcti rect;

	rect.xmin= RNA_int_get(op->ptr, "xmin");
	rect.ymin= RNA_int_get(op->ptr, "ymin");
	rect.xmax= RNA_int_get(op->ptr, "xmax");
	rect.ymax= RNA_int_get(op->ptr, "ymax");

	rv3d->rflag |= RV3D_CLIPPING;
	rv3d->clipbb= MEM_callocN(sizeof(BoundBox), "clipbb");

	/* note; otherwise opengl won't work */
	view3d_operator_needs_opengl(C);

	view3d_set_viewcontext(C, &vc);
	view3d_get_transformation(vc.ar, vc.rv3d, NULL, &mats); /* NULL because we don't want it in object space */
	ED_view3d_calc_clipping(rv3d->clipbb, rv3d->clip, &mats, &rect);

	return OPERATOR_FINISHED;
}

static int view3d_clipping_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	ARegion *ar= CTX_wm_region(C);

	if(rv3d->rflag & RV3D_CLIPPING) {
		rv3d->rflag &= ~RV3D_CLIPPING;
		ED_region_tag_redraw(ar);
		if(rv3d->clipbb) MEM_freeN(rv3d->clipbb);
		rv3d->clipbb= NULL;
		return OPERATOR_FINISHED;
	}
	else {
		return WM_border_select_invoke(C, op, event);
	}
}

/* toggles */
void VIEW3D_OT_clip_border(wmOperatorType *ot)
{

	/* identifiers */
	ot->name= "Clipping Border";
	ot->description = "Set the view clipping border";
	ot->idname= "VIEW3D_OT_clip_border";

	/* api callbacks */
	ot->invoke= view3d_clipping_invoke;
	ot->exec= view3d_clipping_exec;
	ot->modal= WM_border_select_modal;
	ot->cancel= WM_border_select_cancel;

	ot->poll= ED_operator_region_view3d_active;

	/* flags */
	ot->flag= 0;

	/* rna */
	RNA_def_int(ot->srna, "xmin", 0, INT_MIN, INT_MAX, "X Min", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "xmax", 0, INT_MIN, INT_MAX, "X Max", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "ymin", 0, INT_MIN, INT_MAX, "Y Min", "", INT_MIN, INT_MAX);
	RNA_def_int(ot->srna, "ymax", 0, INT_MIN, INT_MAX, "Y Max", "", INT_MIN, INT_MAX);
}

/* ***************** 3d cursor cursor op ******************* */

/* mx my in region coords */
static int set_3dcursor_invoke(bContext *C, wmOperator *UNUSED(op), wmEvent *event)
{
	Scene *scene= CTX_data_scene(C);
	ARegion *ar= CTX_wm_region(C);
	View3D *v3d = CTX_wm_view3d(C);
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	float dx, dy, fz, *fp = NULL, dvec[3], oldcurs[3];
	int mval[2];
//	short ctrl= 0; // XXX
	int flip;
	fp= give_cursor(scene, v3d);

//	if(obedit && ctrl) lr_click= 1;
	copy_v3_v3(oldcurs, fp);

	project_int_noclip(ar, fp, mval);
	flip= initgrabz(rv3d, fp[0], fp[1], fp[2]);
	
	/* reset the depth based on the view offset */
	if(flip) {
		negate_v3_v3(fp, rv3d->ofs);

		/* re initialize */
		project_int_noclip(ar, fp, mval);
		flip= initgrabz(rv3d, fp[0], fp[1], fp[2]);
	}

	if(mval[0]!=IS_CLIPPED) {
		short depth_used = 0;

		if (U.uiflag & USER_ORBIT_ZBUF) { /* maybe this should be accessed some other way */
			view3d_operator_needs_opengl(C);
			if (ED_view3d_autodist(scene, ar, v3d, event->mval, fp))
				depth_used= 1;
		}

		if(depth_used==0) {
			float mval_f[2];
			VECSUB2D(mval_f, mval, event->mval);
			ED_view3d_win_to_delta(ar, mval_f, dvec);
			sub_v3_v3(fp, dvec);
		}
	}
	else {

		dx= ((float)(event->mval[0]-(ar->winx/2)))*rv3d->zfac/(ar->winx/2);
		dy= ((float)(event->mval[1]-(ar->winy/2)))*rv3d->zfac/(ar->winy/2);

		fz= rv3d->persmat[0][3]*fp[0]+ rv3d->persmat[1][3]*fp[1]+ rv3d->persmat[2][3]*fp[2]+ rv3d->persmat[3][3];
		fz= fz/rv3d->zfac;

		fp[0]= (rv3d->persinv[0][0]*dx + rv3d->persinv[1][0]*dy+ rv3d->persinv[2][0]*fz)-rv3d->ofs[0];
		fp[1]= (rv3d->persinv[0][1]*dx + rv3d->persinv[1][1]*dy+ rv3d->persinv[2][1]*fz)-rv3d->ofs[1];
		fp[2]= (rv3d->persinv[0][2]*dx + rv3d->persinv[1][2]*dy+ rv3d->persinv[2][2]*fz)-rv3d->ofs[2];
	}

	if(v3d && v3d->localvd)
		WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, v3d);
	else
		WM_event_add_notifier(C, NC_SCENE|NA_EDITED, scene);

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_cursor3d(wmOperatorType *ot)
{

	/* identifiers */
	ot->name= "Set 3D Cursor";
	ot->description = "Set the location of the 3D cursor";
	ot->idname= "VIEW3D_OT_cursor3d";

	/* api callbacks */
	ot->invoke= set_3dcursor_invoke;

	ot->poll= ED_operator_view3d_active;

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

	/* rna later */

}

/* ***************** manipulator op ******************* */


static int manipulator_invoke(bContext *C, wmOperator *op, wmEvent *event)
{
	View3D *v3d = CTX_wm_view3d(C);

	if(!(v3d->twflag & V3D_USE_MANIPULATOR)) return OPERATOR_PASS_THROUGH;
	if(!(v3d->twflag & V3D_DRAW_MANIPULATOR)) return OPERATOR_PASS_THROUGH;

	/* only no modifier or shift */
	if(event->keymodifier != 0 && event->keymodifier != KM_SHIFT) return OPERATOR_PASS_THROUGH;

	/* note; otherwise opengl won't work */
	view3d_operator_needs_opengl(C);

	if(0==BIF_do_manipulator(C, event, op))
		return OPERATOR_PASS_THROUGH;

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_manipulator(wmOperatorType *ot)
{

	/* identifiers */
	ot->name= "3D Manipulator";
	ot->description = "Manipulate selected item by axis";
	ot->idname= "VIEW3D_OT_manipulator";

	/* api callbacks */
	ot->invoke= manipulator_invoke;

	ot->poll= ED_operator_view3d_active;

	/* properties to pass to transform */
	Transform_Properties(ot, P_CONSTRAINT);
}

static int enable_manipulator_invoke(bContext *C, wmOperator *op, wmEvent *UNUSED(event))
{
	View3D *v3d = CTX_wm_view3d(C);

	v3d->twtype=0;
	
	if (RNA_boolean_get(op->ptr, "translate"))
		v3d->twtype |= V3D_MANIP_TRANSLATE;
	if (RNA_boolean_get(op->ptr, "rotate"))
		v3d->twtype |= V3D_MANIP_ROTATE;
	if (RNA_boolean_get(op->ptr, "scale"))
		v3d->twtype |= V3D_MANIP_SCALE;
		
	WM_event_add_notifier(C, NC_SPACE|ND_SPACE_VIEW3D, v3d);

	return OPERATOR_FINISHED;
}

void VIEW3D_OT_enable_manipulator(wmOperatorType *ot)
{
	/* identifiers */
	ot->name= "Enable 3D Manipulator";
	ot->description = "Enable the transform manipulator for use";
	ot->idname= "VIEW3D_OT_enable_manipulator";
	
	/* api callbacks */
	ot->invoke= enable_manipulator_invoke;
	ot->poll= ED_operator_view3d_active;
	
	/* rna later */
	RNA_def_boolean(ot->srna, "translate", 0, "Translate", "Enable the translate manipulator");
	RNA_def_boolean(ot->srna, "rotate", 0, "Rotate", "Enable the rotate manipulator");
	RNA_def_boolean(ot->srna, "scale", 0, "Scale", "Enable the scale manipulator");
}

/* ************************* below the line! *********************** */


static float view_autodist_depth_margin(ARegion *ar, const int mval[2], int margin)
{
	ViewDepths depth_temp= {0};
	rcti rect;
	float depth_close;

	if(margin==0) {
		/* Get Z Depths, needed for perspective, nice for ortho */
		rect.xmin= mval[0];
		rect.ymin= mval[1];
		rect.xmax= mval[0] + 1;
		rect.ymax= mval[1] + 1;
	}
	else {
		rect.xmax = mval[0] + margin;
		rect.ymax = mval[1] + margin;

		rect.xmin = mval[0] - margin;
		rect.ymin = mval[1] - margin;
	}

	view3d_update_depths_rect(ar, &depth_temp, &rect);
	depth_close= view3d_depth_near(&depth_temp);
	if(depth_temp.depths) MEM_freeN(depth_temp.depths);
	return depth_close;
}

/* XXX todo Zooms in on a border drawn by the user */
int ED_view3d_autodist(Scene *scene, ARegion *ar, View3D *v3d, const int mval[2], float mouse_worldloc[3] ) //, float *autodist )
{
	bglMats mats; /* ZBuffer depth vars */
	float depth_close= FLT_MAX;
	double cent[2],  p[3];

	/* Get Z Depths, needed for perspective, nice for ortho */
	bgl_get_mats(&mats);
	draw_depth(scene, ar, v3d, NULL);

	depth_close= view_autodist_depth_margin(ar, mval, 4);

	if (depth_close==FLT_MAX)
		return 0;

	cent[0] = (double)mval[0];
	cent[1] = (double)mval[1];

	if (!gluUnProject(cent[0], cent[1], depth_close, mats.modelview, mats.projection, (GLint *)mats.viewport, &p[0], &p[1], &p[2]))
		return 0;

	mouse_worldloc[0] = (float)p[0];
	mouse_worldloc[1] = (float)p[1];
	mouse_worldloc[2] = (float)p[2];
	return 1;
}

int ED_view3d_autodist_init(Scene *scene, ARegion *ar, View3D *v3d, int mode) //, float *autodist )
{
	/* Get Z Depths, needed for perspective, nice for ortho */
	switch(mode) {
	case 0:
		draw_depth(scene, ar, v3d, NULL);
		break;
	case 1:
		draw_depth_gpencil(scene, ar, v3d);
		break;
	}

	return 1;
}

// no 4x4 sampling, run view_autodist_init first
int ED_view3d_autodist_simple(ARegion *ar, const int mval[2], float mouse_worldloc[3], int margin, float *force_depth) //, float *autodist )
{
	bglMats mats; /* ZBuffer depth vars, could cache? */
	float depth;
	double cent[2],  p[3];

	/* Get Z Depths, needed for perspective, nice for ortho */
	if(force_depth)
		depth= *force_depth;
	else
		depth= view_autodist_depth_margin(ar, mval, margin);

	if (depth==FLT_MAX)
		return 0;

	cent[0] = (double)mval[0];
	cent[1] = (double)mval[1];

	bgl_get_mats(&mats);
	if (!gluUnProject(cent[0], cent[1], depth, mats.modelview, mats.projection, (GLint *)mats.viewport, &p[0], &p[1], &p[2]))
		return 0;

	mouse_worldloc[0] = (float)p[0];
	mouse_worldloc[1] = (float)p[1];
	mouse_worldloc[2] = (float)p[2];
	return 1;
}

int ED_view3d_autodist_depth(struct ARegion *ar, const int mval[2], int margin, float *depth)
{
	*depth= view_autodist_depth_margin(ar, mval, margin);

	return (*depth==FLT_MAX) ? 0:1;
}

static int depth_segment_cb(int x, int y, void *userData)
{
	struct { struct ARegion *ar; int margin; float depth; } *data = userData;
	int mval[2];
	float depth;

	mval[0]= x;
	mval[1]= y;

	depth= view_autodist_depth_margin(data->ar, mval, data->margin);

	if(depth != FLT_MAX) {
		data->depth= depth;
		return 0;
	}
	else {
		return 1;
	}
}

int ED_view3d_autodist_depth_seg(struct ARegion *ar, const int mval_sta[2], const int mval_end[2], int margin, float *depth)
{
	struct { struct ARegion *ar; int margin; float depth; } data = {NULL};
	int p1[2];
	int p2[2];

	data.ar= ar;
	data.margin= margin;
	data.depth= FLT_MAX;

	VECCOPY2D(p1, mval_sta);
	VECCOPY2D(p2, mval_end);

	plot_line_v2v2i(p1, p2, depth_segment_cb, &data);

	*depth= data.depth;

	return (*depth==FLT_MAX) ? 0:1;
}

/* Gets the view trasnformation from a camera
* currently dosnt take camzoom into account
*
* The dist is not modified for this function, if NULL its assimed zero
* */
void ED_view3d_from_m4(float mat[][4], float ofs[3], float quat[4], float *dist)
{
	/* Offset */
	if (ofs)
		negate_v3_v3(ofs, mat[3]);

	/* Quat */
	if (quat) {
		float imat[4][4];
		invert_m4_m4(imat, mat);
		mat4_to_quat(quat, imat);
	}

	if (dist) {
		float nmat[3][3];
		float vec[3];

		vec[0]= 0.0f;
		vec[1]= 0.0f;
		vec[2]= -(*dist);

		copy_m3_m4(nmat, mat);
		normalize_m3(nmat);

		mul_m3_v3(nmat, vec);;
		sub_v3_v3(ofs, vec);
	}
}

void ED_view3d_to_m4(float mat[][4], const float ofs[3], const float quat[4], const float dist)
{
	float iviewquat[4]= {-quat[0], quat[1], quat[2], quat[3]};
	float dvec[3]= {0.0f, 0.0f, dist};

	quat_to_mat4(mat, iviewquat);
	mul_mat3_m4_v3(mat, dvec);
	sub_v3_v3v3(mat[3], dvec, ofs);
}


/* object -> view */
void ED_view3d_from_object(Object *ob, float ofs[3], float quat[4], float *dist, float *lens)
{
	ED_view3d_from_m4(ob->obmat, ofs, quat, dist);

	if (lens) {
		ED_view3d_ob_clip_range_get(ob, lens, NULL, NULL);
	}
}

/* view -> object */
void ED_view3d_to_object(Object *ob, const float ofs[3], const float quat[4], const float dist)
{
	float mat[4][4];
	ED_view3d_to_m4(mat, ofs, quat, dist);
	object_apply_mat4(ob, mat, TRUE, TRUE);
}