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/libs/cocos2d/Support/TransformUtils.m

http://github.com/kstenerud/ObjectAL-for-iPhone
Objective C | 46 lines | 13 code | 5 blank | 28 comment | 0 complexity | 586fa98d7d6bf2d51647b3d83f50f51c MD5 | raw file
 1/*
 2 * cocos2d for iPhone: http://www.cocos2d-iphone.org
 3 *
 4 * Copyright (c) 2009 Valentin Milea
 5 * 
 6 * Permission is hereby granted, free of charge, to any person obtaining a copy
 7 * of this software and associated documentation files (the "Software"), to deal
 8 * in the Software without restriction, including without limitation the rights
 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 * 
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 * 
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 *
24 */
25
26
27#import "TransformUtils.h"
28
29void CGAffineToGL(const CGAffineTransform *t, GLfloat *m)
30{
31	// | m[0] m[4] m[8]  m[12] |     | m11 m21 m31 m41 |     | a c 0 tx |
32	// | m[1] m[5] m[9]  m[13] |     | m12 m22 m32 m42 |     | b d 0 ty |
33	// | m[2] m[6] m[10] m[14] | <=> | m13 m23 m33 m43 | <=> | 0 0 1  0 |
34	// | m[3] m[7] m[11] m[15] |     | m14 m24 m34 m44 |     | 0 0 0  1 |
35	
36	m[2] = m[3] = m[6] = m[7] = m[8] = m[9] = m[11] = m[14] = 0.0f;
37	m[10] = m[15] = 1.0f;
38	m[0] = t->a; m[4] = t->c; m[12] = t->tx;
39	m[1] = t->b; m[5] = t->d; m[13] = t->ty;
40}
41
42void GLToCGAffine(const GLfloat *m, CGAffineTransform *t)
43{
44	t->a = m[0]; t->c = m[4]; t->tx = m[12];
45	t->b = m[1]; t->d = m[5]; t->ty = m[13];
46}