mirror of https://gitlab.freedesktop.org/mesa/mesa
204 lines
6.0 KiB
C
204 lines
6.0 KiB
C
/*
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* Mesa 3-D graphics library
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*
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* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* \file math/m_matrix.h
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* Defines basic structures for matrix-handling.
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*/
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#ifndef _M_MATRIX_H
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#define _M_MATRIX_H
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#include "util/glheader.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Different kinds of 4x4 transformation matrices.
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* We use these to select specific optimized vertex transformation routines.
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*/
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enum GLmatrixtype {
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MATRIX_GENERAL, /**< general 4x4 matrix */
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MATRIX_IDENTITY, /**< identity matrix */
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MATRIX_3D_NO_ROT, /**< orthogonal projection and others... */
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MATRIX_PERSPECTIVE, /**< perspective projection matrix */
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MATRIX_2D, /**< 2-D transformation */
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MATRIX_2D_NO_ROT, /**< 2-D scale & translate only */
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MATRIX_3D /**< 3-D transformation */
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} ;
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/**
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* Matrix type to represent 4x4 transformation matrices.
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*/
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typedef struct {
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alignas(16) GLfloat m[16]; /**< 16 matrix elements (16-byte aligned) */
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alignas(16) GLfloat inv[16]; /**< 16-element inverse (16-byte aligned) */
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GLuint flags; /**< possible values determined by (of \link
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* MatFlags MAT_FLAG_* flags\endlink)
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*/
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enum GLmatrixtype type;
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} GLmatrix;
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extern void
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_math_matrix_ctr( GLmatrix *m );
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extern void
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_math_matrix_mul_matrix( GLmatrix *dest, const GLmatrix *a, const GLmatrix *b );
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extern void
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_math_matrix_mul_floats( GLmatrix *dest, const GLfloat *b );
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extern void
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_math_matrix_loadf( GLmatrix *mat, const GLfloat *m );
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extern void
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_math_matrix_translate( GLmatrix *mat, GLfloat x, GLfloat y, GLfloat z );
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extern void
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_math_matrix_rotate( GLmatrix *m, GLfloat angle,
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GLfloat x, GLfloat y, GLfloat z );
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extern void
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_math_matrix_scale( GLmatrix *mat, GLfloat x, GLfloat y, GLfloat z );
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extern void
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_math_float_ortho(float *m,
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float left, float right,
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float bottom, float top,
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float nearval, float farval);
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extern void
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_math_matrix_ortho( GLmatrix *mat,
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GLfloat left, GLfloat right,
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GLfloat bottom, GLfloat top,
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GLfloat nearval, GLfloat farval );
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extern void
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_math_matrix_frustum( GLmatrix *mat,
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GLfloat left, GLfloat right,
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GLfloat bottom, GLfloat top,
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GLfloat nearval, GLfloat farval );
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extern void
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_math_matrix_viewport( GLmatrix *m, const float scale[3],
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const float translate[3], double depthMax );
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extern void
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_math_matrix_set_identity( GLmatrix *dest );
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extern void
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_math_matrix_copy( GLmatrix *to, const GLmatrix *from );
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extern void
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_math_matrix_push_copy(GLmatrix *to, GLmatrix *from);
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extern void
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_math_matrix_analyse( GLmatrix *mat );
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extern GLboolean
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_math_matrix_is_length_preserving( const GLmatrix *m );
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extern GLboolean
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_math_matrix_is_general_scale( const GLmatrix *m );
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extern GLboolean
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_math_matrix_is_dirty( const GLmatrix *m );
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/**
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* \name Related functions that don't actually operate on GLmatrix structs
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*/
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/*@{*/
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extern void
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_math_transposef( GLfloat to[16], const GLfloat from[16] );
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extern void
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_math_transposed( GLdouble to[16], const GLdouble from[16] );
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extern void
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_math_transposefd( GLfloat to[16], const GLdouble from[16] );
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/*
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* Transform a point (column vector) by a matrix: Q = M * P
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*/
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#define TRANSFORM_POINT( Q, M, P ) \
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Q[0] = M[0] * P[0] + M[4] * P[1] + M[8] * P[2] + M[12] * P[3]; \
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Q[1] = M[1] * P[0] + M[5] * P[1] + M[9] * P[2] + M[13] * P[3]; \
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Q[2] = M[2] * P[0] + M[6] * P[1] + M[10] * P[2] + M[14] * P[3]; \
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Q[3] = M[3] * P[0] + M[7] * P[1] + M[11] * P[2] + M[15] * P[3];
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#define TRANSFORM_POINT3( Q, M, P ) \
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Q[0] = M[0] * P[0] + M[4] * P[1] + M[8] * P[2] + M[12]; \
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Q[1] = M[1] * P[0] + M[5] * P[1] + M[9] * P[2] + M[13]; \
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Q[2] = M[2] * P[0] + M[6] * P[1] + M[10] * P[2] + M[14]; \
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Q[3] = M[3] * P[0] + M[7] * P[1] + M[11] * P[2] + M[15];
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/*
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* Transform a normal (row vector) by a matrix: [NX NY NZ] = N * MAT
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*/
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#define TRANSFORM_NORMAL( TO, N, MAT ) \
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do { \
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TO[0] = N[0] * MAT[0] + N[1] * MAT[1] + N[2] * MAT[2]; \
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TO[1] = N[0] * MAT[4] + N[1] * MAT[5] + N[2] * MAT[6]; \
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TO[2] = N[0] * MAT[8] + N[1] * MAT[9] + N[2] * MAT[10]; \
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} while (0)
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/**
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* Transform a direction by a matrix.
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*/
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#define TRANSFORM_DIRECTION( TO, DIR, MAT ) \
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do { \
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TO[0] = DIR[0] * MAT[0] + DIR[1] * MAT[4] + DIR[2] * MAT[8]; \
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TO[1] = DIR[0] * MAT[1] + DIR[1] * MAT[5] + DIR[2] * MAT[9]; \
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TO[2] = DIR[0] * MAT[2] + DIR[1] * MAT[6] + DIR[2] * MAT[10]; \
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} while (0)
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extern void
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_mesa_transform_vector(GLfloat u[4], const GLfloat v[4], const GLfloat m[16]);
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/*@}*/
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#ifdef __cplusplus
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}
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#endif
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#endif
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