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| 1 #ifndef EXAMPLES_HELLO_WORLD_GLES_MATRIX_H | |
| 2 #define EXAMPLES_HELLO_WORLD_GLES_MATRIX_H | |
| 3 | |
| 4 /* Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 /** @file matrix.cc | |
| 10 * Implements simple matrix manipulation functions. | |
| 11 */ | |
| 12 | |
| 13 //----------------------------------------------------------------------------- | |
| 14 #define _USE_MATH_DEFINES 1 | |
| 15 #include <limits.h> | |
| 16 #include <math.h> | |
| 17 #include <GLES2/gl2.h> | |
| 18 | |
| 19 typedef GLfloat Matrix_t[16]; | |
| 20 | |
| 21 /// Since GLES2 doesn't have all the nifty matrix transform functions that GL | |
| 22 /// has, we emulate some of them here for the sake of sanity from: | |
| 23 /// http://www.opengl.org/wiki/GluPerspective_code | |
| 24 void glhFrustumf2(Matrix_t mat, | |
| 25 GLfloat left, | |
| 26 GLfloat right, | |
| 27 GLfloat bottom, | |
| 28 GLfloat top, | |
| 29 GLfloat znear, | |
| 30 GLfloat zfar); | |
| 31 | |
| 32 void glhPerspectivef2(Matrix_t mat, | |
| 33 GLfloat fovyInDegrees, | |
| 34 GLfloat aspectRatio, | |
| 35 GLfloat znear, | |
| 36 GLfloat zfar); | |
| 37 | |
| 38 void identity_matrix(Matrix_t mat); | |
| 39 void multiply_matrix(const Matrix_t a, const Matrix_t b, Matrix_t mat); | |
| 40 void rotate_matrix(GLfloat x_deg, GLfloat y_deg, GLfloat z_deg, Matrix_t mat); | |
| 41 void translate_matrix(GLfloat x, GLfloat y, GLfloat z, Matrix_t mat); | |
| 42 | |
| 43 #endif // EXAMPLES_HELLO_WORLD_GLES_MATRIX_H | |
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