/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2009 Intel Corporation.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file math/m_matrix.h
* Defines basic structures for matrix-handling.
*/
#ifndef _M_MATRIX_H
#define _M_MATRIX_H
#include <cogl-matrix.h>
#include <glib.h>
/**
* \name Symbolic names to some of the entries in the matrix
*
* These are handy for the viewport mapping, which is expressed as a matrix.
*/
/*@{*/
#define MAT_SX 0
#define MAT_SY 5
#define MAT_SZ 10
#define MAT_TX 12
#define MAT_TY 13
#define MAT_TZ 14
/*@}*/
/**
* Different kinds of 4x4 transformation matrices.
* We use these to select specific optimized vertex transformation routines.
*/
enum CoglMatrixType {
COGL_MATRIX_TYPE_GENERAL, /**< general 4x4 matrix */
COGL_MATRIX_TYPE_IDENTITY, /**< identity matrix */
COGL_MATRIX_TYPE_3D_NO_ROT, /**< orthogonal projection and others... */
COGL_MATRIX_TYPE_PERSPECTIVE, /**< perspective projection matrix */
COGL_MATRIX_TYPE_2D, /**< 2-D transformation */
COGL_MATRIX_TYPE_2D_NO_ROT, /**< 2-D scale & translate only */
COGL_MATRIX_TYPE_3D /**< 3-D transformation */
} ;
#if 0
/**
* Matrix type to represent 4x4 transformation matrices.
*/
typedef struct {
float *m; /**< 16 matrix elements (16-byte aligned) */
float *inv; /**< optional 16-element inverse (16-byte aligned) */
unsigned int flags; /**< possible values determined by (of \link
* MatFlags MAT_FLAG_* flags\endlink)
*/
enum CoglMatrixType type;
} CoglMatrix;
#endif
void
_math_matrix_multiply (CoglMatrix *result,
const CoglMatrix *a,
const CoglMatrix *b);
void
_math_matrix_multiply_array (CoglMatrix *result, const float *b);
void
_math_matrix_init_from_array (CoglMatrix *matrix, const float *array);
void
_math_matrix_translate (CoglMatrix *matrix, float x, float y, float z);
void
_math_matrix_rotate (CoglMatrix *matrix, float angle,
float x, float y, float z);
void
_math_matrix_scale (CoglMatrix *matrix, float x, float y, float z);
void
_math_matrix_ortho (CoglMatrix *matrix,
float left, float right,
float bottom, float top,
float nearval, float farval);
void
_math_matrix_frustum (CoglMatrix *matrix,
float left, float right,
float bottom, float top,
float nearval, float farval);
void
_math_matrix_viewport (CoglMatrix *matrix,
int x, int y, int width, int height,
float z_near, float z_far, float depth_max);
void
_math_matrix_init_identity (CoglMatrix *matrix);
gboolean
_math_matrix_update_inverse (CoglMatrix *matrix);
void
_math_matrix_update_type_and_flags (CoglMatrix *matrix);
void
_math_matrix_print (const CoglMatrix *matrix);
gboolean
_math_matrix_is_length_preserving (const CoglMatrix *matrix);
gboolean
_math_matrix_has_rotation (const CoglMatrix *matrix);
gboolean
_math_matrix_is_general_scale (const CoglMatrix *matrix);
gboolean
_math_matrix_is_dirty (const CoglMatrix *matrix);
/**
* \name Related functions that don't actually operate on CoglMatrix structs
*/
/*@{*/
void
_math_transposef ( float to[16], const float from[16]);
void
_math_transposed (double to[16], const double from[16]);
void
_math_transposefd (float to[16], const double from[16]);
/*
* Transform a point (column vector) by a matrix: Q = M * P
*/
#define TRANSFORM_POINT( Q, M, P ) \
Q[0] = M[0] * P[0] + M[4] * P[1] + M[8] * P[2] + M[12] * P[3]; \
Q[1] = M[1] * P[0] + M[5] * P[1] + M[9] * P[2] + M[13] * P[3]; \
Q[2] = M[2] * P[0] + M[6] * P[1] + M[10] * P[2] + M[14] * P[3]; \
Q[3] = M[3] * P[0] + M[7] * P[1] + M[11] * P[2] + M[15] * P[3];
#define TRANSFORM_POINT3( Q, M, P ) \
Q[0] = M[0] * P[0] + M[4] * P[1] + M[8] * P[2] + M[12]; \
Q[1] = M[1] * P[0] + M[5] * P[1] + M[9] * P[2] + M[13]; \
Q[2] = M[2] * P[0] + M[6] * P[1] + M[10] * P[2] + M[14]; \
Q[3] = M[3] * P[0] + M[7] * P[1] + M[11] * P[2] + M[15];
/*
* Transform a normal (row vector) by a matrix: [NX NY NZ] = N * MAT
*/
#define TRANSFORM_NORMAL( TO, N, MAT ) \
do { \
TO[0] = N[0] * MAT[0] + N[1] * MAT[1] + N[2] * MAT[2]; \
TO[1] = N[0] * MAT[4] + N[1] * MAT[5] + N[2] * MAT[6]; \
TO[2] = N[0] * MAT[8] + N[1] * MAT[9] + N[2] * MAT[10]; \
} while (0)
/**
* Transform a direction by a matrix.
*/
#define TRANSFORM_DIRECTION( TO, DIR, MAT ) \
do { \
TO[0] = DIR[0] * MAT[0] + DIR[1] * MAT[4] + DIR[2] * MAT[8]; \
TO[1] = DIR[0] * MAT[1] + DIR[1] * MAT[5] + DIR[2] * MAT[9]; \
TO[2] = DIR[0] * MAT[2] + DIR[1] * MAT[6] + DIR[2] * MAT[10];\
} while (0)
void
_mesa_transform_vector (float u[4], const float v[4], const float m[16]);
/*@}*/
#endif