diff options
Diffstat (limited to 'src/mesa/math')
| -rw-r--r-- | src/mesa/math/m_matrix.h | 77 |
1 files changed, 40 insertions, 37 deletions
diff --git a/src/mesa/math/m_matrix.h b/src/mesa/math/m_matrix.h index 96f5649ee8..04a5a3c2bc 100644 --- a/src/mesa/math/m_matrix.h +++ b/src/mesa/math/m_matrix.h @@ -1,13 +1,8 @@ -/** - * \file math/m_matrix.h - * Defines basic structures for matrix-handling. - */ - /* * Mesa 3-D graphics library - * Version: 3.5 + * Version: 6.2 * - * Copyright (C) 1999-2001 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2004 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"), @@ -28,6 +23,11 @@ */ +/** + * \file math/m_matrix.h + * Defines basic structures for matrix-handling. + */ + #ifndef _M_MATRIX_H #define _M_MATRIX_H @@ -36,7 +36,7 @@ /** * \name Symbolic names to some of the entries in the matrix * - * To help out with the rework of the viewport_map as a matrix transform. + * These are handy for the viewport mapping, which is expressed as a matrix. */ /*@{*/ #define MAT_SX 0 @@ -47,29 +47,30 @@ #define MAT_TZ 14 /*@}*/ + /** * \defgroup MatFlags MAT_FLAG_XXX-flags * - * Bitmasks to indicate different kinds of 4x4 matrices in - * GLmatrix::flags + * Bitmasks to indicate different kinds of 4x4 matrices in GLmatrix::flags + * It would be nice to make all these flags private to m_matrix.c */ /*@{*/ - -#define MAT_FLAG_IDENTITY 0 /**< is an identity matrix flag. - * (Not actually used - the identity - * matrix is identified by the absense - / of all other flags.) */ -#define MAT_FLAG_GENERAL 0x1 /**< is a general matrix flag */ -#define MAT_FLAG_ROTATION 0x2 /**< is a rotation matrix flag */ -#define MAT_FLAG_TRANSLATION 0x4 /**< is a translation matrix flag */ -#define MAT_FLAG_UNIFORM_SCALE 0x8 /**< is an uniform scaling matrix flag */ -#define MAT_FLAG_GENERAL_SCALE 0x10 /**< is a general scaling matrix flag */ -#define MAT_FLAG_GENERAL_3D 0x20 /**< general 3D matrix flag */ -#define MAT_FLAG_PERSPECTIVE 0x40 /**< is a perspective projection matrix flag */ -#define MAT_FLAG_SINGULAR 0x80 /**< is a singular matrix flag */ -#define MAT_DIRTY_TYPE 0x100 /**< matrix type is dirty */ -#define MAT_DIRTY_FLAGS 0x200 /**< matrix flags are dirty */ -#define MAT_DIRTY_INVERSE 0x400 /**< matrix inverse is dirty */ +#define MAT_FLAG_IDENTITY 0 /**< is an identity matrix flag. + * (Not actually used - the identity + * matrix is identified by the absense + * of all other flags.) + */ +#define MAT_FLAG_GENERAL 0x1 /**< is a general matrix flag */ +#define MAT_FLAG_ROTATION 0x2 /**< is a rotation matrix flag */ +#define MAT_FLAG_TRANSLATION 0x4 /**< is a translation matrix flag */ +#define MAT_FLAG_UNIFORM_SCALE 0x8 /**< is an uniform scaling matrix flag */ +#define MAT_FLAG_GENERAL_SCALE 0x10 /**< is a general scaling matrix flag */ +#define MAT_FLAG_GENERAL_3D 0x20 /**< general 3D matrix flag */ +#define MAT_FLAG_PERSPECTIVE 0x40 /**< is a perspective proj matrix flag */ +#define MAT_FLAG_SINGULAR 0x80 /**< is a singular matrix flag */ +#define MAT_DIRTY_TYPE 0x100 /**< matrix type is dirty */ +#define MAT_DIRTY_FLAGS 0x200 /**< matrix flags are dirty */ +#define MAT_DIRTY_INVERSE 0x400 /**< matrix inverse is dirty */ /** angle preserving matrix flags mask */ #define MAT_FLAGS_ANGLE_PRESERVING (MAT_FLAG_ROTATION | \ @@ -120,25 +121,27 @@ /** * Different kinds of 4x4 transformation matrices. + * We use these to select specific optimized vertex transformation routines. */ enum GLmatrixtype { - MATRIX_GENERAL, /**< general 4x4 matrix */ - MATRIX_IDENTITY, /**< identity matrix */ - MATRIX_3D_NO_ROT, /**< orthogonal projection and others... */ - MATRIX_PERSPECTIVE, /**< perspective projection matrix */ - MATRIX_2D, /**< 2-D transformation */ - MATRIX_2D_NO_ROT, /**< 2-D scale & translate only */ - MATRIX_3D /**< 3-D transformation */ + MATRIX_GENERAL, /**< general 4x4 matrix */ + MATRIX_IDENTITY, /**< identity matrix */ + MATRIX_3D_NO_ROT, /**< orthogonal projection and others... */ + MATRIX_PERSPECTIVE, /**< perspective projection matrix */ + MATRIX_2D, /**< 2-D transformation */ + MATRIX_2D_NO_ROT, /**< 2-D scale & translate only */ + MATRIX_3D /**< 3-D transformation */ } ; /** - * Matrix. + * Matrix type to represent 4x4 transformation matrices. */ typedef struct { - GLfloat *m; /**< matrix, 16-byte aligned */ - GLfloat *inv; /**< optional inverse, 16-byte aligned */ + GLfloat *m; /**< 16 matrix elements (16-byte aligned) */ + GLfloat *inv; /**< optional 16-element inverse (16-byte aligned) */ GLuint flags; /**< possible values determined by (of \link - MatFlags MAT_FLAG_* flags\endlink) */ + * MatFlags MAT_FLAG_* flags\endlink) + */ enum GLmatrixtype type; } GLmatrix; |