MetaPost / Cardioïde comme enveloppe de cercles

Cardioïde comme enveloppe de cercles

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cardioide.mp [ source brut ]

 R = 80;
 picture pict;
 
 color c[];
 c1 = (0.82,0.13,0.56); % VioletRed;
 c2 = (0.21,0.39,0.55); 
 
 pict := image (
     fill fullcircle scaled 2R withcolor 0.5[c1,white];
     draw fullcircle scaled 2R withcolor c1 withpen pencircle scaled 2;
     );
 
 pair P,Q;
 P := (0,R);
 
 for i=0 upto 72:
     beginfig(i+1);
 	draw pict;
 	
 	Q := R*(cosd(i*5+90),sind(i*5+90));
 	
 	draw fullcircle scaled 2abs(Q-P) shifted Q
 	    withpen pencircle scaled 0.5
 	    withcolor 0.6white;
 	
 	pict := currentpicture;
 	
 	draw Q withpen pencircle scaled 5 withcolor c2;
 	
 	draw (-3R,2R)--(-3R,-3R)--(3R,-3R)--(3R,2R)--cycle
 	    withcolor white;
     endfig;
 endfor;
     
 end

 

Validation CSS Validation XHTMLJean-Michel Sarlat — Dernière modification : 23 mars 2007 (0.07s - 3948287 - jeudi 8 janvier 2009) vers le haut