350 lines
10 KiB
C
350 lines
10 KiB
C
/*
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* $Id$
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*
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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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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* This is a new part of Blender.
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*
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* Contributor(s): Joseph Gilbert, Campbell Barton
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/python/generic/mathutils.c
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* \ingroup pygen
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*/
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#include <Python.h>
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#include "mathutils.h"
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#include "BLI_math.h"
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#include "BLI_utildefines.h"
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PyDoc_STRVAR(M_Mathutils_doc,
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"This module provides access to matrices, eulers, quaternions and vectors."
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);
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static int mathutils_array_parse_fast(float *array, int array_min, int array_max, PyObject *value, const char *error_prefix)
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{
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PyObject *value_fast= NULL;
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PyObject *item;
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int i, size;
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/* non list/tuple cases */
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if(!(value_fast=PySequence_Fast(value, error_prefix))) {
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/* PySequence_Fast sets the error */
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return -1;
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}
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size= PySequence_Fast_GET_SIZE(value_fast);
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if(size > array_max || size < array_min) {
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if (array_max == array_min) PyErr_Format(PyExc_ValueError, "%.200s: sequence size is %d, expected %d", error_prefix, size, array_max);
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else PyErr_Format(PyExc_ValueError, "%.200s: sequence size is %d, expected [%d - %d]", error_prefix, size, array_min, array_max);
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Py_DECREF(value_fast);
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return -1;
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}
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i= size;
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do {
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i--;
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if(((array[i]= PyFloat_AsDouble((item= PySequence_Fast_GET_ITEM(value_fast, i)))) == -1.0f) && PyErr_Occurred()) {
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PyErr_Format(PyExc_ValueError, "%.200s: sequence index %d expected a number, found '%.200s' type, ", error_prefix, i, Py_TYPE(item)->tp_name);
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Py_DECREF(value_fast);
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return -1;
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}
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} while(i);
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Py_XDECREF(value_fast);
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return size;
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}
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/* helper functionm returns length of the 'value', -1 on error */
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int mathutils_array_parse(float *array, int array_min, int array_max, PyObject *value, const char *error_prefix)
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{
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#if 1 /* approx 6x speedup for mathutils types */
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int size;
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if( (VectorObject_Check(value) && (size= ((VectorObject *)value)->size)) ||
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(EulerObject_Check(value) && (size= 3)) ||
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(QuaternionObject_Check(value) && (size= 4)) ||
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(ColorObject_Check(value) && (size= 3))
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) {
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if(BaseMath_ReadCallback((BaseMathObject *)value) == -1) {
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return -1;
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}
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if(size > array_max || size < array_min) {
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if (array_max == array_min) PyErr_Format(PyExc_ValueError, "%.200s: sequence size is %d, expected %d", error_prefix, size, array_max);
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else PyErr_Format(PyExc_ValueError, "%.200s: sequence size is %d, expected [%d - %d]", error_prefix, size, array_min, array_max);
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return -1;
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}
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memcpy(array, ((BaseMathObject *)value)->data, size * sizeof(float));
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return size;
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}
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else
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#endif
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{
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return mathutils_array_parse_fast(array, array_min, array_max, value, error_prefix);
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}
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}
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int mathutils_any_to_rotmat(float rmat[3][3], PyObject *value, const char *error_prefix)
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{
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if(EulerObject_Check(value)) {
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if(BaseMath_ReadCallback((BaseMathObject *)value) == -1) {
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return -1;
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}
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else {
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eulO_to_mat3(rmat, ((EulerObject *)value)->eul, ((EulerObject *)value)->order);
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return 0;
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}
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}
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else if (QuaternionObject_Check(value)) {
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if(BaseMath_ReadCallback((BaseMathObject *)value) == -1) {
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return -1;
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}
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else {
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float tquat[4];
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normalize_qt_qt(tquat, ((QuaternionObject *)value)->quat);
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quat_to_mat3(rmat, tquat);
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return 0;
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}
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}
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else if (MatrixObject_Check(value)) {
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if(BaseMath_ReadCallback((BaseMathObject *)value) == -1) {
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return -1;
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}
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else if(((MatrixObject *)value)->col_size < 3 || ((MatrixObject *)value)->row_size < 3) {
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PyErr_Format(PyExc_ValueError, "%.200s: matrix must have minimum 3x3 dimensions", error_prefix);
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return -1;
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}
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else {
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matrix_as_3x3(rmat, (MatrixObject *)value);
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normalize_m3(rmat);
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return 0;
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}
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}
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else {
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PyErr_Format(PyExc_TypeError, "%.200s: expected a Euler, Quaternion or Matrix type, found %.200s", error_prefix, Py_TYPE(value)->tp_name);
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return -1;
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}
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}
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//----------------------------------MATRIX FUNCTIONS--------------------
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/* Utility functions */
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// LomontRRDCompare4, Ever Faster Float Comparisons by Randy Dillon
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#define SIGNMASK(i) (-(int)(((unsigned int)(i))>>31))
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int EXPP_FloatsAreEqual(float af, float bf, int maxDiff)
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{ // solid, fast routine across all platforms
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// with constant time behavior
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int ai = *(int *)(&af);
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int bi = *(int *)(&bf);
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int test = SIGNMASK(ai^bi);
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int diff, v1, v2;
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assert((0 == test) || (0xFFFFFFFF == test));
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diff = (ai ^ (test & 0x7fffffff)) - bi;
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v1 = maxDiff + diff;
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v2 = maxDiff - diff;
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return (v1|v2) >= 0;
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}
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/*---------------------- EXPP_VectorsAreEqual -------------------------
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Builds on EXPP_FloatsAreEqual to test vectors */
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int EXPP_VectorsAreEqual(float *vecA, float *vecB, int size, int floatSteps)
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{
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int x;
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for (x=0; x< size; x++){
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if (EXPP_FloatsAreEqual(vecA[x], vecB[x], floatSteps) == 0)
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return 0;
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}
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return 1;
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}
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/* Mathutils Callbacks */
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/* for mathutils internal use only, eventually should re-alloc but to start with we only have a few users */
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static Mathutils_Callback *mathutils_callbacks[8] = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
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int Mathutils_RegisterCallback(Mathutils_Callback *cb)
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{
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int i;
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/* find the first free slot */
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for(i= 0; mathutils_callbacks[i]; i++) {
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if(mathutils_callbacks[i]==cb) /* already registered? */
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return i;
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}
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mathutils_callbacks[i] = cb;
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return i;
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}
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/* use macros to check for NULL */
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int _BaseMathObject_ReadCallback(BaseMathObject *self)
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{
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Mathutils_Callback *cb= mathutils_callbacks[self->cb_type];
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if(cb->get(self, self->cb_subtype) != -1)
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return 0;
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if(!PyErr_Occurred())
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PyErr_Format(PyExc_RuntimeError, "%s read, user has become invalid", Py_TYPE(self)->tp_name);
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return -1;
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}
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int _BaseMathObject_WriteCallback(BaseMathObject *self)
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{
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Mathutils_Callback *cb= mathutils_callbacks[self->cb_type];
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if(cb->set(self, self->cb_subtype) != -1)
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return 0;
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if(!PyErr_Occurred())
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PyErr_Format(PyExc_RuntimeError, "%s write, user has become invalid", Py_TYPE(self)->tp_name);
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return -1;
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}
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int _BaseMathObject_ReadIndexCallback(BaseMathObject *self, int index)
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{
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Mathutils_Callback *cb= mathutils_callbacks[self->cb_type];
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if(cb->get_index(self, self->cb_subtype, index) != -1)
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return 0;
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if(!PyErr_Occurred())
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PyErr_Format(PyExc_RuntimeError, "%s read index, user has become invalid", Py_TYPE(self)->tp_name);
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return -1;
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}
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int _BaseMathObject_WriteIndexCallback(BaseMathObject *self, int index)
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{
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Mathutils_Callback *cb= mathutils_callbacks[self->cb_type];
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if(cb->set_index(self, self->cb_subtype, index) != -1)
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return 0;
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if(!PyErr_Occurred())
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PyErr_Format(PyExc_RuntimeError, "%s write index, user has become invalid", Py_TYPE(self)->tp_name);
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return -1;
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}
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/* BaseMathObject generic functions for all mathutils types */
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char BaseMathObject_Owner_doc[] = "The item this is wrapping or None (readonly).";
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PyObject *BaseMathObject_getOwner(BaseMathObject *self, void *UNUSED(closure))
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{
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PyObject *ret= self->cb_user ? self->cb_user : Py_None;
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Py_INCREF(ret);
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return ret;
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}
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char BaseMathObject_Wrapped_doc[] = "True when this object wraps external data (readonly).\n\n:type: boolean";
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PyObject *BaseMathObject_getWrapped(BaseMathObject *self, void *UNUSED(closure))
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{
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return PyBool_FromLong((self->wrapped == Py_WRAP) ? 1:0);
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}
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int BaseMathObject_traverse(BaseMathObject *self, visitproc visit, void *arg)
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{
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Py_VISIT(self->cb_user);
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return 0;
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}
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int BaseMathObject_clear(BaseMathObject *self)
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{
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Py_CLEAR(self->cb_user);
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return 0;
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}
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void BaseMathObject_dealloc(BaseMathObject *self)
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{
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/* only free non wrapped */
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if(self->wrapped != Py_WRAP) {
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PyMem_Free(self->data);
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}
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if(self->cb_user) {
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PyObject_GC_UnTrack(self);
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BaseMathObject_clear(self);
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}
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Py_TYPE(self)->tp_free(self); // PyObject_DEL(self); // breaks subtypes
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}
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/*----------------------------MODULE INIT-------------------------*/
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static struct PyMethodDef M_Mathutils_methods[] = {
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{NULL, NULL, 0, NULL}
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};
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static struct PyModuleDef M_Mathutils_module_def = {
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PyModuleDef_HEAD_INIT,
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"mathutils", /* m_name */
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M_Mathutils_doc, /* m_doc */
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0, /* m_size */
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M_Mathutils_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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PyMODINIT_FUNC BPyInit_mathutils(void)
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{
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PyObject *submodule;
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PyObject *item;
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if(PyType_Ready(&vector_Type) < 0)
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return NULL;
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if(PyType_Ready(&matrix_Type) < 0)
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return NULL;
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if(PyType_Ready(&euler_Type) < 0)
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return NULL;
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if(PyType_Ready(&quaternion_Type) < 0)
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return NULL;
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if(PyType_Ready(&color_Type) < 0)
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return NULL;
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submodule = PyModule_Create(&M_Mathutils_module_def);
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/* each type has its own new() function */
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PyModule_AddObject(submodule, "Vector", (PyObject *)&vector_Type);
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PyModule_AddObject(submodule, "Matrix", (PyObject *)&matrix_Type);
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PyModule_AddObject(submodule, "Euler", (PyObject *)&euler_Type);
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PyModule_AddObject(submodule, "Quaternion", (PyObject *)&quaternion_Type);
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PyModule_AddObject(submodule, "Color", (PyObject *)&color_Type);
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/* submodule */
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PyModule_AddObject(submodule, "geometry", (item=BPyInit_mathutils_geometry()));
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/* XXX, python doesnt do imports with this usefully yet
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* 'from mathutils.geometry import PolyFill'
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* ...fails without this. */
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PyDict_SetItemString(PyThreadState_GET()->interp->modules, "mathutils.geometry", item);
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Py_INCREF(item);
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mathutils_matrix_vector_cb_index= Mathutils_RegisterCallback(&mathutils_matrix_vector_cb);
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return submodule;
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}
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