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/*
* $Id$
*
* ***** BEGIN GPL/BL DUAL 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. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* This is a new part of Blender.
*
* Contributor(s): Joseph Gilbert, Campbell Barton
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#include "Geometry.h"
/* - Not needed for now though other geometry functions will probably need them
#include "BLI_arithb.h"
#include "BKE_utildefines.h"
*/
/* Used for PolyFill */
#include "BKE_displist.h"
#include "MEM_guardedalloc.h"
#include "BLI_blenlib.h"
/* needed for EXPP_ReturnPyObjError and EXPP_check_sequence_consistency */
#include "gen_utils.h"
/*-------------------------DOC STRINGS ---------------------------*/
static char M_Geometry_doc[] = "The Blender Geometry module\n\n";
static char M_Geometry_PolyFill_doc[] = "(veclist_list) - takes a list of polylines (each point a vector) and returns the point indicies for a polyline filled with triangles";
/*-----------------------METHOD DEFINITIONS ----------------------*/
struct PyMethodDef M_Geometry_methods[] = {
{"PolyFill", ( PyCFunction ) M_Geometry_PolyFill, METH_VARARGS, M_Geometry_PolyFill_doc},
{NULL, NULL, 0, NULL}
};
/*----------------------------MODULE INIT-------------------------*/
PyObject *Geometry_Init(void)
{
PyObject *submodule;
submodule = Py_InitModule3("Blender.Geometry",
M_Geometry_methods, M_Geometry_doc);
return (submodule);
}
/*----------------------------------Geometry.PolyFill() -------------------*/
/* PolyFill function, uses Blenders scanfill to fill multiple poly lines */
PyObject *M_Geometry_PolyFill( PyObject * self, PyObject * args )
{
PyObject *tri_list; /*return this list of tri's */
PyObject *polyLineSeq, *polyLine, *polyVec;
int i, len_polylines, len_polypoints;
/* display listbase */
ListBase dispbase={NULL, NULL};
DispList *dl;
float *fp; /*pointer to the array of malloced dl->verts to set the points from the vectors */
int index, *dl_face, totpoints=0;
dispbase.first= dispbase.last= NULL;
if(!PyArg_ParseTuple ( args, "O", &polyLineSeq) || !PySequence_Check(polyLineSeq)) {
return EXPP_ReturnPyObjError( PyExc_TypeError,
"expected a sequence of poly lines" );
}
len_polylines = PySequence_Size( polyLineSeq );
for( i = 0; i < len_polylines; ++i ) {
polyLine= PySequence_GetItem( polyLineSeq, i );
if (!PySequence_Check(polyLineSeq)) {
freedisplist(&dispbase);
Py_DECREF(polyLine);
return EXPP_ReturnPyObjError( PyExc_TypeError,
"expected a sequence of poly lines" );
}
len_polypoints= PySequence_Size( polyLine );
if (len_polypoints>0) { /* dont bother adding edges as polylines */
if (EXPP_check_sequence_consistency( polyLine, &vector_Type ) != 1) {
freedisplist(&dispbase);
Py_DECREF(polyLine);
return EXPP_ReturnPyObjError( PyExc_TypeError,
"expected a sequence of poly lines" );
}
dl= MEM_callocN(sizeof(DispList), "poly disp");
BLI_addtail(&dispbase, dl);
dl->type= DL_INDEX3;
dl->nr= len_polypoints;
dl->type= DL_POLY;
dl->parts= 1; /* no faces, 1 edge loop */
dl->col= 0; /* no material */
dl->verts= fp= MEM_callocN( sizeof(float)*3*len_polypoints, "dl verts");
dl->index= MEM_callocN(sizeof(int)*3*len_polypoints, "dl index");
for( index = 0; index<len_polypoints; ++index, fp+=3) {
polyVec= PySequence_GetItem( polyLine, index );
fp[0] = ((VectorObject *)polyVec)->vec[0];
fp[1] = ((VectorObject *)polyVec)->vec[1];
if( ((VectorObject *)polyVec)->size > 2 )
fp[2] = ((VectorObject *)polyVec)->vec[2];
else
fp[2]= 0.0f; /* if its a 2d vector then set the z to be zero */
totpoints++;
Py_DECREF(polyVec);
}
}
Py_DECREF(polyLine);
}
if (totpoints) {
/* now make the list to return */
filldisplist(&dispbase, &dispbase);
/* The faces are stored in a new DisplayList
thats added to the head of the listbase */
dl= dispbase.first;
tri_list= PyList_New(dl->parts);
if( !tri_list ) {
freedisplist(&dispbase);
return EXPP_ReturnPyObjError( PyExc_RuntimeError,
"PyList_New() failed" );
}
index= 0;
dl_face= dl->index;
while(index < dl->parts) {
PyList_SetItem(tri_list, index, Py_BuildValue("iii", dl_face[0], dl_face[1], dl_face[2]) );
dl_face+= 3;
index++;
}
freedisplist(&dispbase);
} else {
/* no points, do this so scripts dont barf */
tri_list= PyList_New(0);
}
return tri_list;
}
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