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* An object oriented GL/GLES Abstraction/Utility Layer
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* Copyright (C) 2009 Intel Corporation.
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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* Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
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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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* 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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* 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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* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* \file math/m_matrix.h
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* Defines basic structures for matrix-handling.
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#include <cogl-matrix.h>
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* \name Symbolic names to some of the entries in the matrix
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* These are handy for the viewport mapping, which is expressed as a matrix.
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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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COGL_MATRIX_TYPE_GENERAL, /**< general 4x4 matrix */
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COGL_MATRIX_TYPE_IDENTITY, /**< identity matrix */
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COGL_MATRIX_TYPE_3D_NO_ROT, /**< orthogonal projection and others... */
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COGL_MATRIX_TYPE_PERSPECTIVE, /**< perspective projection matrix */
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COGL_MATRIX_TYPE_2D, /**< 2-D transformation */
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COGL_MATRIX_TYPE_2D_NO_ROT, /**< 2-D scale & translate only */
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COGL_MATRIX_TYPE_3D /**< 3-D transformation */
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* Matrix type to represent 4x4 transformation matrices.
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float *m; /**< 16 matrix elements (16-byte aligned) */
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float *inv; /**< optional 16-element inverse (16-byte aligned) */
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unsigned int flags; /**< possible values determined by (of \link
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* MatFlags MAT_FLAG_* flags\endlink)
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enum CoglMatrixType type;
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_math_matrix_multiply (CoglMatrix *result,
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const CoglMatrix *b);
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_math_matrix_multiply_array (CoglMatrix *result, const float *b);
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_math_matrix_init_from_array (CoglMatrix *matrix, const float *array);
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_math_matrix_translate (CoglMatrix *matrix, float x, float y, float z);
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_math_matrix_rotate (CoglMatrix *matrix, float angle,
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float x, float y, float z);
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_math_matrix_scale (CoglMatrix *matrix, float x, float y, float z);
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_math_matrix_ortho (CoglMatrix *matrix,
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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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_math_matrix_frustum (CoglMatrix *matrix,
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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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_math_matrix_viewport (CoglMatrix *matrix,
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int x, int y, int width, int height,
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float z_near, float z_far, float depth_max);
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_math_matrix_init_identity (CoglMatrix *matrix);
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_math_matrix_update_inverse (CoglMatrix *matrix);
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_math_matrix_update_type_and_flags (CoglMatrix *matrix);
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_math_matrix_print (const CoglMatrix *matrix);
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_math_matrix_is_length_preserving (const CoglMatrix *matrix);
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_math_matrix_has_rotation (const CoglMatrix *matrix);
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_math_matrix_is_general_scale (const CoglMatrix *matrix);
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_math_matrix_is_dirty (const CoglMatrix *matrix);
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* \name Related functions that don't actually operate on CoglMatrix structs
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_math_transposef ( float to[16], const float from[16]);
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_math_transposed (double to[16], const double from[16]);
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_math_transposefd (float to[16], const double from[16]);
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* Transform a point (column vector) by a matrix: Q = M * P
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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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* Transform a normal (row vector) by a matrix: [NX NY NZ] = N * MAT
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#define TRANSFORM_NORMAL( TO, N, MAT ) \
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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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* Transform a direction by a matrix.
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#define TRANSFORM_DIRECTION( TO, DIR, MAT ) \
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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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_mesa_transform_vector (float u[4], const float v[4], const float m[16]);
added
removed
clutter/cogl/cogl/cogl-matrix-mesa.h
