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made it to work with my windows compiler

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This commit is contained in:
Perttu Ahola 2011-02-08 10:11:26 +02:00
parent dd9e82f5bc
commit 15f27a1937
3 changed files with 24 additions and 6 deletions
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14
src/noise.cpp
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@ -19,6 +19,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include <math.h>
#include "noise.h"
#include <iostream>
#define NOISE_MAGIC_X 1619
#define NOISE_MAGIC_Y 31337
@ -62,16 +63,23 @@ double noise2d_gradient(double x, double y, int seed)
{
int x0 = (x > 0.0 ? (int)x : (int)x - 1);
int y0 = (y > 0.0 ? (int)y : (int)y - 1);
double xl = x-x0;
double yl = y-y0;
double xl = x - (double)x0;
double yl = y - (double)y0;
int n00 = (int)((noise2d(x0, y0, seed)+1)*8);
int n10 = (int)((noise2d(x0+1, y0, seed)+1)*8);
int n01 = (int)((noise2d(x0, y0+1, seed)+1)*8);
int n11 = (int)((noise2d(x0+1, y0+1, seed)+1)*8);
/* In this format, these fail to work on MSVC8 if n00 < 4
double s = dotProduct(cos_lookup[n00], cos_lookup[(n00-4)%16], xl, yl);
double u = dotProduct(-cos_lookup[n10], cos_lookup[(n10-4)%16], 1.-xl, yl);
double v = dotProduct(cos_lookup[n01], -cos_lookup[(n01-4)%16], xl, 1.-yl);
double w = dotProduct(-cos_lookup[n11], -cos_lookup[(n11-4)%16], 1.-xl, 1.-yl);
double w = dotProduct(-cos_lookup[n11], -cos_lookup[(n11-4)%16], 1.-xl, 1.-yl);*/
double s = dotProduct(cos_lookup[n00], cos_lookup[(n00+12)%16], xl, yl);
double u = dotProduct(-cos_lookup[n10], cos_lookup[(n10+12)%16], 1.-xl, yl);
double v = dotProduct(cos_lookup[n01], -cos_lookup[(n01+12)%16], xl, 1.-yl);
double w = dotProduct(-cos_lookup[n11], -cos_lookup[(n11+12)%16], 1.-xl, 1.-yl);
/*std::cout<<"x="<<x<<" y="<<y<<" x0="<<x0<<" y0="<<y0<<" xl="<<xl<<" yl="<<yl<<" n00="<<n00<<" n10="<<n01<<" s="<<s<<std::endl;
std::cout<<"cos_lookup[n00]="<<(cos_lookup[n00])<<" cos_lookup[(n00-4)%16]="<<(cos_lookup[(n00-4)%16])<<std::endl;*/
return biLinearInterpolation(s,u,v,w,xl,yl);
}