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dgRandom.h
1 /* Copyright (c) <2003-2011> <Julio Jerez, Newton Game Dynamics>
2 *
3 * This software is provided 'as-is', without any express or implied
4 * warranty. In no event will the authors be held liable for any damages
5 * arising from the use of this software.
6 *
7 * Permission is granted to anyone to use this software for any purpose,
8 * including commercial applications, and to alter it and redistribute it
9 * freely, subject to the following restrictions:
10 *
11 * 1. The origin of this software must not be misrepresented; you must not
12 * claim that you wrote the original software. If you use this software
13 * in a product, an acknowledgment in the product documentation would be
14 * appreciated but is not required.
15 *
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 *
19 * 3. This notice may not be removed or altered from any source distribution.
20 */
21 
22 #ifndef __dgRandom__
23 #define __dgRandom__
24 
25 #include "dgStdafx.h"
26 
27 const dgFloat64 fRandom = (dgFloat64(1.0) / dgFloat64((dgUnsigned32)(0xffffffff)));
28 
29 // return a random number between 0 and 0xffffffff;
30 dgUnsigned32 dgApi dgRandom();
31 
32 inline dgFloat32 dgfRandom() {
33  return (dgFloat32)(dgRandom() * fRandom);
34 }
35 
36 
37 void dgApi dgRandomize(dgUnsigned32 Seed);
38 
39 #endif
40