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#include<stdio.h>#include<math.h>voidworley_noise(){constintS=1024;// image SizeconstintN=128;// Number of pointsconstintK=2;// color value sKalestaticintx[N],y[N];// points positionsinti,j,k;for(i=0;i<N;i){x[i]=rand()%S;y[i]=rand()%S;}FILE*fo=fopen("c:\\temp\\worley.pnm","wb");fprintf(fo,"P5\n#Created by Shqn\n%d %d\n255\n",S,S);for(j=0;j<S;j)for(i=0;i<S;i){// for each pixel...intmind=S;for(k=0;k<N;k){// compute min distanceintdx=i-x[k];intdy=j-y[k];intd=(int)sqrt((double)(dx*dxdy*dy));if(mind>d)mind=d;}mind*=K;// scale and clipunsignedcharb=mind<255?mind:255;fwrite(&b,1,1,fo);}fclose(fo);}
New code : c program
// Worley noise: example of worley noise with euclidean distance function by Rocchini#include<stdio.h>#include<stdlib.h> // rand#include<time.h>#include<math.h>intmain(){constintS=1024;// image SizeconstintN=128;// Number of pointsconstintK=2;// color value sKaleintx[N],y[N];// points positionsinti,j,k;srand(time(NULL));// Initialization, should only be called once.for(i=0;i<N;i){x[i]=rand()%S;y[i]=rand()%S;}FILE*fo=fopen("worley.pnm","wb");fprintf(fo,"P5\n %d %d\n255\n",S,S);for(j=0;j<S;j)for(i=0;i<S;i){// for each pixel...intmind=S;for(k=0;k<N;k){// compute min distanceintdx=i-x[k];intdy=j-y[k];intd=(int)sqrt((double)(dx*dxdy*dy));if(mind>d)mind=d;}mind*=K;// scale and clipunsignedcharb=mind<255?mind:255;fwrite(&b,1,1,fo);}fclose(fo);return0;}
Using libvips library:
vips vipsworley w.png 1000 1000
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