You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
951 B
55 lines
951 B
//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
|
|
//
|
|
// Purpose:
|
|
//
|
|
//=====================================================================================//
|
|
|
|
#include <halton.h>
|
|
|
|
// NOTE: This has to be the last file included!
|
|
#include "tier0/memdbgon.h"
|
|
|
|
|
|
HaltonSequenceGenerator_t::HaltonSequenceGenerator_t(int b)
|
|
{
|
|
base=b;
|
|
fbase=(float) b;
|
|
seed=1;
|
|
|
|
}
|
|
|
|
float HaltonSequenceGenerator_t::GetElement(int elem)
|
|
{
|
|
int tmpseed=seed;
|
|
float ret=0.0;
|
|
float base_inv=1.0/fbase;
|
|
while(tmpseed)
|
|
{
|
|
int dig=tmpseed % base;
|
|
ret+=((float) dig)*base_inv;
|
|
base_inv/=fbase;
|
|
tmpseed/=base;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
int InsideOut( int nTotal, int nCounter )
|
|
{
|
|
int b = 0;
|
|
for ( int m = nTotal, k = 1; k < nTotal; k <<= 1 )
|
|
{
|
|
if ( nCounter << 1 >= m )
|
|
{
|
|
b += k;
|
|
nCounter -= ( m + 1 ) >> 1;
|
|
m >>= 1;
|
|
}
|
|
else
|
|
{
|
|
m = ( m + 1 ) >> 1;
|
|
}
|
|
}
|
|
Assert( ( b >= 0 ) && ( b < nTotal ) );
|
|
return b;
|
|
}
|