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/* $Id: m_matrix.h,v 1.1 2003-02-28 11:48:05 pj Exp $ */

/*

 * Mesa 3-D graphics library

 * Version:  3.5

 *

 * Copyright (C) 1999-2001  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.

 */

#ifndef _M_MATRIX_H

#define _M_MATRIX_H

/* Give symbolic names to some of the entries in the matrix to help

 * out with the rework of the viewport_map as a matrix transform.

 */

#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:

 */

#define MATRIX_GENERAL          0       /* general 4x4 matrix */

#define MATRIX_IDENTITY         1       /* identity matrix */

#define MATRIX_3D_NO_ROT        2       /* ortho projection and others... */

#define MATRIX_PERSPECTIVE      3       /* perspective projection matrix */

#define MATRIX_2D               4       /* 2-D transformation */

#define MATRIX_2D_NO_ROT        5       /* 2-D scale & translate only */

#define MATRIX_3D               6       /* 3-D transformation */

#define MAT_FLAG_IDENTITY       0

#define MAT_FLAG_GENERAL        0x1

#define MAT_FLAG_ROTATION       0x2

#define MAT_FLAG_TRANSLATION    0x4

#define MAT_FLAG_UNIFORM_SCALE  0x8

#define MAT_FLAG_GENERAL_SCALE  0x10

#define MAT_FLAG_GENERAL_3D     0x20

#define MAT_FLAG_PERSPECTIVE    0x40

#define MAT_FLAG_SINGULAR       0x80

#define MAT_DIRTY_TYPE          0x100

#define MAT_DIRTY_FLAGS         0x200

#define MAT_DIRTY_INVERSE       0x400

#define MAT_FLAGS_ANGLE_PRESERVING (MAT_FLAG_ROTATION | \

                                    MAT_FLAG_TRANSLATION | \

                                    MAT_FLAG_UNIFORM_SCALE)

#define MAT_FLAGS_LENGTH_PRESERVING (MAT_FLAG_ROTATION | \

                                     MAT_FLAG_TRANSLATION)

#define MAT_FLAGS_3D (MAT_FLAG_ROTATION | \

                      MAT_FLAG_TRANSLATION | \

                      MAT_FLAG_UNIFORM_SCALE | \

                      MAT_FLAG_GENERAL_SCALE | \

                      MAT_FLAG_GENERAL_3D)

#define MAT_FLAGS_GEOMETRY (MAT_FLAG_GENERAL | \

                            MAT_FLAG_ROTATION | \

                            MAT_FLAG_TRANSLATION | \

                            MAT_FLAG_UNIFORM_SCALE | \

                            MAT_FLAG_GENERAL_SCALE | \

                            MAT_FLAG_GENERAL_3D | \

                            MAT_FLAG_PERSPECTIVE | \

                            MAT_FLAG_SINGULAR)

#define MAT_DIRTY          (MAT_DIRTY_TYPE | \

                            MAT_DIRTY_FLAGS | \

                            MAT_DIRTY_INVERSE)

#define TEST_MAT_FLAGS(mat, a)  \

    ((MAT_FLAGS_GEOMETRY & (~(a)) & ((mat)->flags) ) == 0)

typedef struct {

   GLfloat *m;          /* 16-byte aligned */

   GLfloat *inv;        /* optional, 16-byte aligned */

   GLuint flags;

   GLuint type;         /* one of the MATRIX_* values */

} GLmatrix;

extern void

_math_matrix_ctr( GLmatrix *m );

extern void

_math_matrix_dtr( GLmatrix *m );

extern void

_math_matrix_alloc_inv( GLmatrix *m );

extern void

_math_matrix_mul_matrix( GLmatrix *dest, const GLmatrix *a, const GLmatrix *b );

extern void

_math_matrix_mul_floats( GLmatrix *dest, const GLfloat *b );

extern void

_math_matrix_loadf( GLmatrix *mat, const GLfloat *m );

extern void

_math_matrix_translate( GLmatrix *mat, GLfloat x, GLfloat y, GLfloat z );

extern void

_math_matrix_rotate( GLmatrix *m, GLfloat angle,

                     GLfloat x, GLfloat y, GLfloat z );

extern void

_math_matrix_scale( GLmatrix *mat, GLfloat x, GLfloat y, GLfloat z );

extern void

_math_matrix_ortho( GLmatrix *mat,

                    GLfloat left, GLfloat right,

                    GLfloat bottom, GLfloat top,

                    GLfloat nearval, GLfloat farval );

extern void

_math_matrix_frustum( GLmatrix *mat,

                      GLfloat left, GLfloat right,

                      GLfloat bottom, GLfloat top,

                      GLfloat nearval, GLfloat farval );

extern void

_math_matrix_set_identity( GLmatrix *dest );

extern void

_math_matrix_copy( GLmatrix *to, const GLmatrix *from );

extern void

_math_matrix_analyse( GLmatrix *mat );

extern void

_math_matrix_print( const GLmatrix *m );

/* Related functions that don't actually operate on GLmatrix structs:

 */

extern void

_math_transposef( GLfloat to[16], const GLfloat from[16] );

extern void

_math_transposed( GLdouble to[16], const GLdouble from[16] );

extern void

_math_transposefd( GLfloat to[16], const GLdouble from[16] );

#endif