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35 lines
794 B
Plaintext
35 lines
794 B
Plaintext
/**
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* Rotate.
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*
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* Rotating a square around the Z axis. To get the results
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* you expect, send the rotate function angle parameters that are
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* values between 0 and PI*2 (TWO_PI which is roughly 6.28). If you prefer to
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* think about angles as degrees (0-360), you can use the radians()
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* method to convert your values. For example: scale(radians(90))
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* is identical to the statement scale(PI/2).
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*/
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float angle;
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float jitter;
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void setup() {
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size(640, 360);
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noStroke();
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fill(255);
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rectMode(CENTER);
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}
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void draw() {
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background(51);
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// during even-numbered seconds (0, 2, 4, 6...)
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if (second() % 2 == 0) {
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jitter = random(-0.1, 0.1);
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}
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angle = angle + jitter;
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float c = cos(angle);
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translate(width/2, height/2);
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rotate(c);
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rect(0, 0, 180, 180);
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}
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