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31 lines
798 B
Plaintext
31 lines
798 B
Plaintext
/**
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* Recursion.
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*
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* A demonstration of recursion, which means functions call themselves.
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* Notice how the drawCircle() function calls itself at the end of its block.
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* It continues to do this until the variable "level" is equal to 1.
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*/
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void setup() {
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size(640, 360);
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noStroke();
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smooth();
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drawCircle(width*0.5, height*0.5, 160, 8);
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}
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void drawCircle(float x, float y, int radius, int level) {
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float tt = 126 * level/6.0;
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fill(tt, 153);
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ellipse(x, y, radius*2, radius*2);
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if(level > 1) {
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level = level - 1;
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int num = int(random(2, 6));
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for(int i=0; i<num; i++) {
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float a = random(0, TWO_PI);
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float nx = x + cos(a) * 6.0 * level;
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float ny = y + sin(a) * 6.0 * level;
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drawCircle(nx, ny, radius/2, level);
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}
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}
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}
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