diff options
Diffstat (limited to 'source/blender/python/mathutils/mathutils_geometry.c')
| -rw-r--r-- | source/blender/python/mathutils/mathutils_geometry.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/source/blender/python/mathutils/mathutils_geometry.c b/source/blender/python/mathutils/mathutils_geometry.c index 4d05b837952..524515ac460 100644 --- a/source/blender/python/mathutils/mathutils_geometry.c +++ b/source/blender/python/mathutils/mathutils_geometry.c @@ -944,6 +944,109 @@ static PyObject *M_Geometry_barycentric_transform(PyObject *UNUSED(self), PyObje return Vector_CreatePyObject(vec, 3, Py_NEW, NULL); } +PyDoc_STRVAR(M_Geometry_points_in_planes_doc, +".. function:: points_in_planes(planes)\n" +"\n" +" Returns a list of points inside all planes given and a list of index values for the planes used.\n" +"\n" +" :arg planes: List of planes (4D vectors).\n" +" :type planes: list of :class:`mathutils.Vector`\n" +" :return: two lists, once containing the vertices inside the planes, another containing the plane indicies used\n" +" :rtype: pair of lists\n" +); +/* note: this function could be optimized by some spatial structure */ +static PyObject *M_Geometry_points_in_planes(PyObject *UNUSED(self), PyObject *args) +{ + PyObject *py_planes; + float (*planes)[4]; + unsigned int planes_len; + + if (!PyArg_ParseTuple(args, "O:points_in_planes", + &py_planes)) + { + return NULL; + } + + if ((planes_len = mathutils_array_parse_alloc_v((float **)&planes, 4, py_planes, "points_in_planes")) == -1) { + return NULL; + } + else { + /* note, this could be refactored into plain C easy - py bits are noted */ + const float eps = 0.0001f; + const unsigned int len = (unsigned int)planes_len; + unsigned int i, j, k, l; + + float n1n2[3], n2n3[3], n3n1[3]; + float potentialVertex[3]; + char *planes_used = MEM_callocN(sizeof(char) * len, __func__); + + /* python */ + PyObject *py_verts = PyList_New(0); + PyObject *py_plene_index = PyList_New(0); + + for (i = 0; i < len; i++) { + const float *N1 = planes[i]; + for (j = i + 1; j < len; j++) { + const float *N2 = planes[j]; + cross_v3_v3v3(n1n2, N1, N2); + if (len_squared_v3(n1n2) > eps) { + for (k = j + 1; k < len; k++) { + const float *N3 = planes[k]; + cross_v3_v3v3(n2n3, N2, N3); + if (len_squared_v3(n2n3) > eps) { + cross_v3_v3v3(n3n1, N3, N1); + if (len_squared_v3(n3n1) > eps) { + const float quotient = dot_v3v3(N1, n2n3); + if (fabsf(quotient) > eps) { + /* potentialVertex = (n2n3 * N1[3] + n3n1 * N2[3] + n1n2 * N3[3]) * (-1.0 / quotient); */ + const float quotient_ninv = -1.0f / quotient; + potentialVertex[0] = ((n2n3[0] * N1[3]) + (n3n1[0] * N2[3]) + (n1n2[0] * N3[3])) * quotient_ninv; + potentialVertex[1] = ((n2n3[1] * N1[3]) + (n3n1[1] * N2[3]) + (n1n2[1] * N3[3])) * quotient_ninv; + potentialVertex[2] = ((n2n3[2] * N1[3]) + (n3n1[2] * N2[3]) + (n1n2[2] * N3[3])) * quotient_ninv; + for (l = 0; l < len; l++) { + const float *NP = planes[l]; + if ((dot_v3v3(NP, potentialVertex) + NP[3]) > 0.000001f) { + break; + } + } + + if (l == len) { /* ok */ + /* python */ + PyObject *item = Vector_CreatePyObject(potentialVertex, 3, Py_NEW, NULL); + PyList_Append(py_verts, item); + Py_DECREF(item); + + planes_used[i] = planes_used[j] = planes_used[k] = TRUE; + } + } + } + } + } + } + } + } + + PyMem_Free(planes); + + /* now make a list of used planes */ + for (i = 0; i < len; i++) { + if (planes_used[i]) { + PyObject *item = PyLong_FromLong(i); + PyList_Append(py_plene_index, item); + Py_DECREF(item); + } + } + MEM_freeN(planes_used); + + { + PyObject *ret = PyTuple_New(2); + PyTuple_SET_ITEM(ret, 0, py_verts); + PyTuple_SET_ITEM(ret, 1, py_plene_index); + return ret; + } + } +} + #ifndef MATH_STANDALONE PyDoc_STRVAR(M_Geometry_interpolate_bezier_doc, @@ -1279,6 +1382,7 @@ static PyMethodDef M_Geometry_methods[] = { {"area_tri", (PyCFunction) M_Geometry_area_tri, METH_VARARGS, M_Geometry_area_tri_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}, #ifndef MATH_STANDALONE {"interpolate_bezier", (PyCFunction) M_Geometry_interpolate_bezier, METH_VARARGS, M_Geometry_interpolate_bezier_doc}, {"tessellate_polygon", (PyCFunction) M_Geometry_tessellate_polygon, METH_O, M_Geometry_tessellate_polygon_doc}, |