76 lines
1.3 KiB
Text
76 lines
1.3 KiB
Text
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float theta;
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float x, y, d = 0.01;
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float arcsin3(float x){
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return (1.025*(x+pow(x,3)/6));
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}
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float arcsin1(float x){
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return (1.11*x);
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}
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void setup(){
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size(600,600);
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theta = 0;
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noStroke();
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}
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void draw(){
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translate(300,300);
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rotate(-PI/2);
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x = cos(theta);
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y = sin(theta);
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if(theta < 0.01){
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d = 0.01;
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}else if(theta > 2*PI - 0.01){
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d = -0.01;
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}
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theta += d;
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background(0);
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fill(0xFF*4/4);
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arc(0,0,480,480,0,theta);
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fill(0xFF*3/4);
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if(arcsin3(y)>PI/4){
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arc(0,0,400,400,0, PI*1/2-arcsin3(x) );
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}else if(arcsin3(y)<-PI/4){
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arc(0,0,400,400,0, PI*3/2+arcsin3(x) );
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}else if(x>0){
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if(y>0){
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arc(0,0,400,400,0, arcsin3(y) );
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}else{
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arc(0,0,400,400,0, 2*PI+arcsin3(y) );
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}
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}else{
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arc(0,0,400,400,0, PI-arcsin3(y) );
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}
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fill(0xFF*2/4);
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if(arcsin1(y)>PI/4){
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arc(0,0,320,320,0, PI*1/2-arcsin1(x) );
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}else if(arcsin1(y)<-PI/4){
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arc(0,0,320,320,0, PI*3/2+arcsin1(x) );
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}else if(x>0){
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if(y>0){
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arc(0,0,320,320,0, arcsin1(y) );
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}else{
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arc(0,0,320,320,0, 2*PI+arcsin1(y) );
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}
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}else{
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arc(0,0,320,320,0, PI-arcsin1(y) );
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}
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fill(0xFF*1/4);
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if(x>0){
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if(y>0){
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arc(0,0,240,240,0, asin(y) );
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}else{
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arc(0,0,240,240,0, 2*PI+asin(y) );
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}
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}else{
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arc(0,0,240,240,0, PI-asin(y) );
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}
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}
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