File:Worley.jpg

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Summary

Description
English: Worley noise: example of worley noise with euclidean distance function
Date
Source Own work
Author Rocchini

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Source Code

Very very raw C source code: 

#include <stdio.h> #include <math.h>  void worley_noise() { 	const int S = 1024;		// image Size 	const int N  = 128;		// Number of points 	const int K  = 2;		// color value sKale 	static int x[N],y[N];		// points positions 	int i,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... 		int mind = S; 		for(k=0;k<N;++k) {					// compute min distance 			int dx = i-x[k]; 			int dy = j-y[k]; 			int d = (int)sqrt((double)(dx*dx+dy*dy)); 			if(mind>d) mind = d; 		} 		 		mind *= K;							// scale and clip 		unsigned char b = 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>  int main() { 	const int S = 1024;		// image Size 	const int N  = 128;		// Number of points 	const int K  = 2;		// color value sKale 	int x[N],y[N];		// points positions 	int i,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... 			int mind = S; 			for(k=0;k<N;++k) {					// compute min distance 				int dx = i-x[k]; 				int dy = j-y[k]; 				int d = (int)sqrt((double)(dx*dx+dy*dy)); 				if(mind>d) mind = d; 			} 		 		mind *= K;							// scale and clip 		unsigned char b = mind<255 ? mind : 255; 		fwrite(&b,1,1,fo); 	} 	fclose(fo); 	 	return 0; }

Using libvips library: 

 vips vipsworley w.png  1000 1000

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current06:51, 5 April 2012Thumbnail for version as of 06:51, 5 April 20121,024 × 1,024 (40 KB)Rocchini

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