139 lines
3.4 KiB
C
139 lines
3.4 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Contributor(s): Lukas Toenne
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/python/mathutils/mathutils_interpolate.c
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* \ingroup pymathutils
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*/
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#include <Python.h>
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#include "mathutils.h"
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#include "mathutils_interpolate.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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#ifndef MATH_STANDALONE /* define when building outside blender */
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# include "MEM_guardedalloc.h"
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#endif
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/*-------------------------DOC STRINGS ---------------------------*/
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PyDoc_STRVAR(M_Interpolate_doc,
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"The Blender interpolate module"
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);
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/* ---------------------------------WEIGHT CALCULATION ----------------------- */
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#ifndef MATH_STANDALONE
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PyDoc_STRVAR(M_Interpolate_poly_3d_calc_doc,
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".. function:: poly_3d_calc(veclist, pt)\n"
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"\n"
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" Calculate barycentric weights for a point on a polygon.\n"
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"\n"
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" :arg veclist: list of vectors\n"
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" :arg pt: point"
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" :rtype: list of per-vector weights\n"
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);
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static PyObject *M_Interpolate_poly_3d_calc(PyObject *UNUSED(self), PyObject *args)
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{
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float fp[3];
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float (*vecs)[3];
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Py_ssize_t len;
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PyObject *point, *veclist, *ret;
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int i;
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if (!PyArg_ParseTuple(
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args, "OO!:poly_3d_calc",
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&veclist,
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&vector_Type, &point))
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{
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return NULL;
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}
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if (BaseMath_ReadCallback((VectorObject *)point) == -1)
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return NULL;
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fp[0] = ((VectorObject *)point)->vec[0];
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fp[1] = ((VectorObject *)point)->vec[1];
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if (((VectorObject *)point)->size > 2)
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fp[2] = ((VectorObject *)point)->vec[2];
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else
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fp[2] = 0.0f; /* if its a 2d vector then set the z to be zero */
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len = mathutils_array_parse_alloc_v(((float **)&vecs), 3, veclist, __func__);
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if (len == -1) {
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return NULL;
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}
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if (len) {
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float *weights = MEM_mallocN(sizeof(float) * len, __func__);
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interp_weights_poly_v3(weights, vecs, len, fp);
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ret = PyList_New(len);
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for (i = 0; i < len; i++) {
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PyList_SET_ITEM(ret, i, PyFloat_FromDouble(weights[i]));
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}
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MEM_freeN(weights);
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PyMem_Free(vecs);
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}
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else {
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ret = PyList_New(0);
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}
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return ret;
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}
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#endif /* MATH_STANDALONE */
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static PyMethodDef M_Interpolate_methods[] = {
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#ifndef MATH_STANDALONE
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{"poly_3d_calc", (PyCFunction) M_Interpolate_poly_3d_calc, METH_VARARGS, M_Interpolate_poly_3d_calc_doc},
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#endif
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{NULL, NULL, 0, NULL}
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};
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static struct PyModuleDef M_Interpolate_module_def = {
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PyModuleDef_HEAD_INIT,
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"mathutils.interpolate", /* m_name */
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M_Interpolate_doc, /* m_doc */
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0, /* m_size */
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M_Interpolate_methods, /* m_methods */
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NULL, /* m_reload */
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NULL, /* m_traverse */
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NULL, /* m_clear */
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NULL, /* m_free */
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};
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/*----------------------------MODULE INIT-------------------------*/
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PyMODINIT_FUNC PyInit_mathutils_interpolate(void)
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{
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PyObject *submodule = PyModule_Create(&M_Interpolate_module_def);
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return submodule;
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}
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