[Bf-blender-cvs] [c2d22f7] gooseberry: New python submodule `mathutils.interpolate` for various mesh interpolation and weighting methods.
Lukas Tönne
noreply at git.blender.org
Mon Dec 15 20:06:52 CET 2014
Commit: c2d22f79ad2e45173e04cd091ea4e042ac8e1247
Author: Lukas Tönne
Date: Mon Dec 15 19:45:01 2014 +0100
Branches: gooseberry
https://developer.blender.org/rBc2d22f79ad2e45173e04cd091ea4e042ac8e1247
New python submodule `mathutils.interpolate` for various mesh interpolation and weighting methods.
This module will contain mirrored functions for calculating and applying
weights for points on a mesh. This includes barycentric and UV weighting
and possibly more advanced global weighting such as harmonic weights.
The naming should follow this scheme:
<type>_{2d,3d}_{calc,apply}
e.g.
poly_2d_calc
poly_2d_apply
uv_3d_calc
...
Reviewers: campbellbarton
Differential Revision: https://developer.blender.org/D939
===================================================================
M source/blender/python/mathutils/CMakeLists.txt
M source/blender/python/mathutils/mathutils.c
A source/blender/python/mathutils/mathutils_interpolate.c
A source/blender/python/mathutils/mathutils_interpolate.h
===================================================================
diff --git a/source/blender/python/mathutils/CMakeLists.txt b/source/blender/python/mathutils/CMakeLists.txt
index 133b8d3..ef6b090 100644
--- a/source/blender/python/mathutils/CMakeLists.txt
+++ b/source/blender/python/mathutils/CMakeLists.txt
@@ -38,6 +38,7 @@ set(SRC
mathutils_Quaternion.c
mathutils_Vector.c
mathutils_geometry.c
+ mathutils_interpolate.c
mathutils_kdtree.c
mathutils_noise.c
@@ -48,6 +49,7 @@ set(SRC
mathutils_Quaternion.h
mathutils_Vector.h
mathutils_geometry.h
+ mathutils_interpolate.h
mathutils_kdtree.h
mathutils_noise.h
)
diff --git a/source/blender/python/mathutils/mathutils.c b/source/blender/python/mathutils/mathutils.c
index 349f848..2349987 100644
--- a/source/blender/python/mathutils/mathutils.c
+++ b/source/blender/python/mathutils/mathutils.c
@@ -477,6 +477,7 @@ static struct PyModuleDef M_Mathutils_module_def = {
/* submodules only */
#include "mathutils_geometry.h"
+#include "mathutils_interpolate.h"
#ifndef MATH_STANDALONE
# include "mathutils_kdtree.h"
# include "mathutils_noise.h"
@@ -512,6 +513,7 @@ PyMODINIT_FUNC PyInit_mathutils(void)
/* submodule */
PyModule_AddObject(mod, "geometry", (submodule = PyInit_mathutils_geometry()));
+ PyModule_AddObject(mod, "interpolate", (submodule = PyInit_mathutils_interpolate()));
/* XXX, python doesnt do imports with this usefully yet
* 'from mathutils.geometry import PolyFill'
* ...fails without this. */
diff --git a/source/blender/python/mathutils/mathutils_interpolate.c b/source/blender/python/mathutils/mathutils_interpolate.c
new file mode 100644
index 0000000..4d7841b
--- /dev/null
+++ b/source/blender/python/mathutils/mathutils_interpolate.c
@@ -0,0 +1,137 @@
+/*
+ * ***** 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.
+ *
+ * Contributor(s): Lukas Toenne
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/python/mathutils/mathutils_interpolate.c
+ * \ingroup pymathutils
+ */
+
+
+#include <Python.h>
+
+#include "mathutils.h"
+#include "mathutils_interpolate.h"
+
+#include "BLI_math.h"
+#include "BLI_utildefines.h"
+
+#ifndef MATH_STANDALONE /* define when building outside blender */
+# include "MEM_guardedalloc.h"
+#endif
+
+/*-------------------------DOC STRINGS ---------------------------*/
+PyDoc_STRVAR(M_Interpolate_doc,
+"The Blender interpolate module"
+);
+
+/* ---------------------------------WEIGHT CALCULATION ----------------------- */
+
+#ifndef MATH_STANDALONE
+
+PyDoc_STRVAR(M_Interpolate_poly_3d_calc_doc,
+".. function:: poly_3d_calc(veclist, pt)\n"
+"\n"
+" Calculate barycentric weights for a point on a polygon.\n"
+"\n"
+" :arg veclist: list of vectors\n"
+" :arg pt: point"
+" :rtype: list of per-vector weights\n"
+);
+static PyObject *M_Interpolate_poly_3d_calc(PyObject *UNUSED(self), PyObject *args)
+{
+ float fp[3];
+ float (*vecs)[3];
+ Py_ssize_t len;
+
+ PyObject *point, *veclist, *ret;
+ int i;
+
+ if (!PyArg_ParseTuple(args, "OO!:interpolation_weights",
+ &veclist,
+ &vector_Type, &point))
+ {
+ return NULL;
+ }
+
+ if (BaseMath_ReadCallback((VectorObject *)point) == -1)
+ return NULL;
+
+ fp[0] = ((VectorObject *)point)->vec[0];
+ fp[1] = ((VectorObject *)point)->vec[1];
+ if (((VectorObject *)point)->size > 2)
+ fp[2] = ((VectorObject *)point)->vec[2];
+ else
+ fp[2] = 0.0f; /* if its a 2d vector then set the z to be zero */
+
+ len = mathutils_array_parse_alloc_v(((float **)&vecs), 3, veclist, "interpolation_weights");
+ if (len == -1) {
+ return NULL;
+ }
+
+ if (len) {
+ float *weights = MEM_mallocN(sizeof(float) * len, "interpolation weights");
+
+ interp_weights_poly_v3(weights, vecs, len, fp);
+
+ ret = PyList_New(len);
+ for (i = 0; i < len; i++) {
+ PyList_SET_ITEM(ret, i, PyFloat_FromDouble(weights[i]));
+ }
+
+ MEM_freeN(weights);
+
+ PyMem_Free(vecs);
+ }
+ else {
+ ret = PyList_New(0);
+ }
+
+ return ret;
+}
+
+#endif /* MATH_STANDALONE */
+
+
+static PyMethodDef M_Interpolate_methods[] = {
+#ifndef MATH_STANDALONE
+ {"poly_3d_calc", (PyCFunction) M_Interpolate_poly_3d_calc, METH_VARARGS, M_Interpolate_poly_3d_calc_doc},
+#endif
+ {NULL, NULL, 0, NULL}
+};
+
+static struct PyModuleDef M_Interpolate_module_def = {
+ PyModuleDef_HEAD_INIT,
+ "mathutils.interpolate", /* m_name */
+ M_Interpolate_doc, /* m_doc */
+ 0, /* m_size */
+ M_Interpolate_methods, /* m_methods */
+ NULL, /* m_reload */
+ NULL, /* m_traverse */
+ NULL, /* m_clear */
+ NULL, /* m_free */
+};
+
+/*----------------------------MODULE INIT-------------------------*/
+PyMODINIT_FUNC PyInit_mathutils_interpolate(void)
+{
+ PyObject *submodule = PyModule_Create(&M_Interpolate_module_def);
+ return submodule;
+}
diff --git a/source/blender/python/mathutils/mathutils_interpolate.h b/source/blender/python/mathutils/mathutils_interpolate.h
new file mode 100644
index 0000000..1bbff6f
--- /dev/null
+++ b/source/blender/python/mathutils/mathutils_interpolate.h
@@ -0,0 +1,32 @@
+/*
+ * ***** 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.
+ *
+ * Contributor(s): Lukas Toenne
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#ifndef __MATHUTILS_INTERPOLATE_H__
+#define __MATHUTILS_INTERPOLATE_H__
+
+/** \file blender/python/mathutils/mathutils_interpolate.h
+ * \ingroup pymathutils
+ */
+
+PyMODINIT_FUNC PyInit_mathutils_interpolate(void);
+
+#endif /* __MATHUTILS_INTERPOLATE_H__ */
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