hgewin/random.cpp


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/*
** Haaf's Game Engine 1.8
** Copyright (C) 2003-2007, Relish Games
** hge.relishgames.com
**
** Core functions implementation: random number generation
*/


#include "hge_impl.h"


unsigned int g_seed=0;

void CALL HGE_Impl::Random_Seed(int seed)
{
	if(!seed) g_seed=timeGetTime();
	else g_seed=seed;
}

int CALL HGE_Impl::Random_Int(int min, int max)
{
	g_seed=214013*g_seed+2531011;
	return min+(g_seed ^ g_seed>>15)%(max-min+1);
}

float CALL HGE_Impl::Random_Float(float min, float max)
{
	g_seed=214013*g_seed+2531011;
	//return min+g_seed*(1.0f/4294967295.0f)*(max-min);
	return min+(g_seed>>16)*(1.0f/65535.0f)*(max-min);
}