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utility function volume_tetrahedron(), for mathutils and BLI math.

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This commit is contained in:
Campbell Barton
2013-04-21 13:24:45 +00:00
parent 1fe7657b4f
commit c667f1ff10
3 changed files with 63 additions and 0 deletions
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46
source/blender/python/mathutils/mathutils_geometry.c
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@@ -467,6 +467,51 @@ static PyObject *M_Geometry_area_tri(PyObject *UNUSED(self), PyObject *args)
}
}
PyDoc_STRVAR(M_Geometry_volume_tetrahedron_doc,
".. function:: volume_tetrahedron(v1, v2, v3, v4)\n"
"\n"
" Return the volume formed by a tetrahedron (points can be in any order).\n"
"\n"
" :arg v1: Point1\n"
" :type v1: :class:`mathutils.Vector`\n"
" :arg v2: Point2\n"
" :type v2: :class:`mathutils.Vector`\n"
" :arg v3: Point3\n"
" :type v3: :class:`mathutils.Vector`\n"
" :arg v4: Point4\n"
" :type v4: :class:`mathutils.Vector`\n"
" :rtype: float\n"
);
static PyObject *M_Geometry_volume_tetrahedron(PyObject *UNUSED(self), PyObject *args)
{
VectorObject *vec1, *vec2, *vec3, *vec4;
if (!PyArg_ParseTuple(args, "O!O!O!O!:volume_tetrahedron",
&vector_Type, &vec1,
&vector_Type, &vec2,
&vector_Type, &vec3,
&vector_Type, &vec4))
{
return NULL;
}
if (vec1->size < 3 || vec2->size < 3 || vec3->size < 3 || vec4->size < 3) {
PyErr_SetString(PyExc_ValueError,
"geometry.volume_tetrahedron(...): "
" can't use 2D Vectors");
return NULL;
}
if (BaseMath_ReadCallback(vec1) == -1 ||
BaseMath_ReadCallback(vec2) == -1 ||
BaseMath_ReadCallback(vec3) == -1 ||
BaseMath_ReadCallback(vec4) == -1)
{
return NULL;
}
return PyFloat_FromDouble(volume_tetrahedron_v3(vec1->vec, vec2->vec, vec3->vec, vec4->vec));
}
PyDoc_STRVAR(M_Geometry_intersect_line_line_2d_doc,
".. function:: intersect_line_line_2d(lineA_p1, lineA_p2, lineB_p1, lineB_p2)\n"
@@ -1458,6 +1503,7 @@ static PyMethodDef M_Geometry_methods[] = {
{"distance_point_to_plane", (PyCFunction) M_Geometry_distance_point_to_plane, METH_VARARGS, M_Geometry_distance_point_to_plane_doc},
{"intersect_sphere_sphere_2d", (PyCFunction) M_Geometry_intersect_sphere_sphere_2d, METH_VARARGS, M_Geometry_intersect_sphere_sphere_2d_doc},
{"area_tri", (PyCFunction) M_Geometry_area_tri, METH_VARARGS, M_Geometry_area_tri_doc},
{"volume_tetrahedron", (PyCFunction) M_Geometry_volume_tetrahedron, METH_VARARGS, M_Geometry_volume_tetrahedron_doc},
{"normal", (PyCFunction) M_Geometry_normal, METH_VARARGS, M_Geometry_normal_doc},
{"barycentric_transform", (PyCFunction) M_Geometry_barycentric_transform, METH_VARARGS, M_Geometry_barycentric_transform_doc},
{"points_in_planes", (PyCFunction) M_Geometry_points_in_planes, METH_VARARGS, M_Geometry_points_in_planes_doc},