File:Fractal canopy.svg

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Summary

Description
English: Example of Fractal Canopy with angle=PI/11 and reduction factor=0.75
Date
Source Own work
Author Claudio Rocchini

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Source Code

/* (C)2013 Claudio Rocchini, CC-BY 3.0 */ #include <stdio.h> #include <stdlib.h> #include <math.h> #include <vector>  const double PI = 3.1415926535897932384626433832795;  class edge { public: 	double l,t,a,x,y; 	edge() {} 	edge( double nl, double nt, double na, double nx, double ny ) : 		l(nl),t(nt),a(na),x(nx),y(ny) {} };  int main() { 	const double SX = 800;  const double SY = 800; 	const double a = PI/11; const double r = 0.75; const double minl = 10; 	 	std::vector<edge> st; 	st.push_back( edge(200,25,-PI/2,SX/2,SY-10) ); 	 	FILE * fo = fopen("fractal_canopy.svg","w"); 	fprintf(fo, 		"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\"?>\n" 		"<svg xmlns:svg=\"http://www.w3.org/2000/svg\" xmlns=\"http://www.w3.org/2000/svg\"\n" 		"version=\"1.0\" width=\"%g\" height=\"%g\" id=\"fractal_canopy\">\n" 		,SX,SY 	); 	 	double lastt = -1.0; 	for(size_t i=0;i<st.size();++i) { 		double nx = st[i].x+st[i].l*cos(st[i].a); 		double ny = st[i].y+st[i].l*sin(st[i].a); 	 		if(lastt!=st[i].t) { 			if(lastt!=-1.0) fprintf(fo,"</g>\n"); 			lastt = st[i].t; 			fprintf(fo,"<g style=\"stroke:#000000;stroke-width:%g;fill:none\">\n" 				,lastt); 		} 		fprintf(fo,"<line x1=\"%6.2f\" y1=\"%6.2f\" x2=\"%6.2f\" y2=\"%6.2f\"/>\n" 			,st[i].x,st[i].y,nx,ny); 		if(st[i].l<=minl) continue; 		st.push_back( edge(st[i].l*r,st[i].t*r,st[i].a+a,nx,ny) ); 		st.push_back( edge(st[i].l*r,st[i].t*r,st[i].a-a,nx,ny) ); 	} 	fprintf(fo,"</g>\n"); 	fprintf(fo,"</svg>\n"); 	fclose(fo); 	return 0; }

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2 January 2013

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current10:41, 2 January 2013Thumbnail for version as of 10:41, 2 January 2013800 × 800 (229 KB)RocchiniUser created page with UploadWizard

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