2 * ICE / OPCODE - Optimized Collision Detection
3 * http://www.codercorner.com/Opcode.htm
5 * Copyright (c) 2001-2008 Pierre Terdiman, pierre@codercorner.com
7 This software is provided 'as-is', without any express or implied warranty.
8 In no event will the authors be held liable for any damages arising from the use of this software.
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it freely,
11 subject to the following restrictions:
13 1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
14 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
15 3. This notice may not be removed or altered from any source distribution.
17 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
19 * Contains code for random generators.
21 * \author Pierre Terdiman
22 * \date August, 9, 2001
24 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
26 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
28 #ifndef __ICERANDOM_H__
29 #define __ICERANDOM_H__
31 FUNCTION ICECORE_API void SRand(udword seed);
32 FUNCTION ICECORE_API udword Rand();
34 //! Returns a unit random floating-point value
35 inline_ float UnitRandomFloat() { return float(Rand()) * ONE_OVER_RAND_MAX; }
37 //! Returns a random index so that 0<= index < max_index
38 ICECORE_API udword GetRandomIndex(udword max_index);
40 class ICECORE_API BasicRandom
45 inline_ BasicRandom(udword seed=0) : mRnd(seed) {}
47 inline_ ~BasicRandom() {}
49 inline_ void SetSeed(udword seed) { mRnd = seed; }
50 inline_ udword GetCurrentValue() const { return mRnd; }
51 inline_ udword Randomize() { mRnd = mRnd * 2147001325 + 715136305; return mRnd; }
57 #endif // __ICERANDOM_H__