KX_PyMath.cpp

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/*
 * ***** 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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 * Initialize Python thingies.
 */

#if defined(WIN32) && !defined(FREE_WINDOWS)
#pragma warning (disable : 4786)
#endif //WIN32

#ifdef WITH_PYTHON

#include "MT_Vector3.h"
#include "MT_Vector4.h"
#include "MT_Matrix4x4.h"
#include "MT_Point2.h"

#include "ListValue.h"

#include "KX_Python.h"
#include "KX_PyMath.h"

bool PyOrientationTo(PyObject* pyval, MT_Matrix3x3 &rot, const char *error_prefix)
{
    int size= PySequence_Size(pyval);
    
    if (size == 4)
    {
        MT_Quaternion qrot;
        if (PyQuatTo(pyval, qrot))
        {
            rot.setRotation(qrot);
            return true;
        }
    }
    else if (size == 3) {
        /* 3x3 matrix or euler */
        MT_Vector3 erot;
        if (PyVecTo(pyval, erot))
        {
            rot.setEuler(erot);
            return true;
        }
        PyErr_Clear();
        
        if (PyMatTo(pyval, rot))
        {
            return true;
        }
    }
    
    PyErr_Format(PyExc_TypeError, "%s, could not set the orientation from a 3x3 matrix, quaternion or euler sequence", error_prefix);
    return false;
}

bool PyQuatTo(PyObject* pyval, MT_Quaternion &qrot)
{
    if(!PyVecTo(pyval, qrot))
        return false;

    /* annoying!, Blender/Mathutils have the W axis first! */
    MT_Scalar w= qrot[0]; /* from python, this is actually the W */
    qrot[0]= qrot[1];
    qrot[1]= qrot[2];
    qrot[2]= qrot[3];
    qrot[3]= w;

    return true;
}

PyObject* PyObjectFrom(const MT_Matrix4x4 &mat)
{
#ifdef USE_MATHUTILS
    float fmat[16];
    mat.getValue(fmat);
    return Matrix_CreatePyObject(fmat, 4, 4, Py_NEW, NULL);
#else
    PyObject *collist = PyList_New(4);
    PyObject *col;
    int i;
    
    for(i=0; i < 4; i++) {
        col = PyList_New(4);
        PyList_SET_ITEM(col, 0, PyFloat_FromDouble(mat[0][i]));
        PyList_SET_ITEM(col, 1, PyFloat_FromDouble(mat[1][i]));
        PyList_SET_ITEM(col, 2, PyFloat_FromDouble(mat[2][i]));
        PyList_SET_ITEM(col, 3, PyFloat_FromDouble(mat[3][i]));
        PyList_SET_ITEM(collist, i, col);
    }
    
    return collist;
#endif
}

PyObject* PyObjectFrom(const MT_Matrix3x3 &mat)
{
#ifdef USE_MATHUTILS
    float fmat[9];
    mat.getValue3x3(fmat);
    return Matrix_CreatePyObject(fmat, 3, 3, Py_NEW, NULL);
#else
    PyObject *collist = PyList_New(3);
    PyObject *col;
    int i;
    
    for(i=0; i < 3; i++) {
        col = PyList_New(3);
        PyList_SET_ITEM(col, 0, PyFloat_FromDouble(mat[0][i]));
        PyList_SET_ITEM(col, 1, PyFloat_FromDouble(mat[1][i]));
        PyList_SET_ITEM(col, 2, PyFloat_FromDouble(mat[2][i]));
        PyList_SET_ITEM(collist, i, col);
    }
    
    return collist;
#endif
}

#ifdef USE_MATHUTILS
PyObject* PyObjectFrom(const MT_Quaternion &qrot)
{
    /* NOTE, were re-ordering here for Mathutils compat */
    float fvec[4]= {qrot[3], qrot[0], qrot[1], qrot[2]};
    return Quaternion_CreatePyObject(fvec, Py_NEW, NULL);
}
#endif

PyObject* PyObjectFrom(const MT_Tuple4 &vec)
{
#ifdef USE_MATHUTILS
    float fvec[4]= {vec[0], vec[1], vec[2], vec[3]};
    return Vector_CreatePyObject(fvec, 4, Py_NEW, NULL);
#else
    PyObject *list = PyList_New(4);
    PyList_SET_ITEM(list, 0, PyFloat_FromDouble(vec[0]));
    PyList_SET_ITEM(list, 1, PyFloat_FromDouble(vec[1]));
    PyList_SET_ITEM(list, 2, PyFloat_FromDouble(vec[2]));
    PyList_SET_ITEM(list, 3, PyFloat_FromDouble(vec[3]));
    return list;
#endif
}

PyObject* PyObjectFrom(const MT_Tuple3 &vec)
{
#ifdef USE_MATHUTILS
    float fvec[3]= {vec[0], vec[1], vec[2]};
    return Vector_CreatePyObject(fvec, 3, Py_NEW, NULL);
#else
    PyObject *list = PyList_New(3);
    PyList_SET_ITEM(list, 0, PyFloat_FromDouble(vec[0]));
    PyList_SET_ITEM(list, 1, PyFloat_FromDouble(vec[1]));
    PyList_SET_ITEM(list, 2, PyFloat_FromDouble(vec[2]));
    return list;
#endif  
}

PyObject* PyObjectFrom(const MT_Tuple2 &vec)
{
#ifdef USE_MATHUTILS
    float fvec[2]= {vec[0], vec[1]};
    return Vector_CreatePyObject(fvec, 2, Py_NEW, NULL);
#else
    PyObject *list = PyList_New(2);
    PyList_SET_ITEM(list, 0, PyFloat_FromDouble(vec[0]));
    PyList_SET_ITEM(list, 1, PyFloat_FromDouble(vec[1]));
    return list;
#endif
}

#endif // WITH_PYTHON