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41 lines
787 B
Plaintext
41 lines
787 B
Plaintext
/**
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* Arm.
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*
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* The angle of each segment is controlled with the mouseX and
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* mouseY position. The transformations applied to the first segment
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* are also applied to the second segment because they are inside
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* the same pushMatrix() and popMatrix() group.
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*/
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float x, y;
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float angle1 = 0.0;
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float angle2 = 0.0;
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float segLength = 100;
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void setup() {
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size(640, 360);
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strokeWeight(30);
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stroke(255, 160);
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x = width * 0.3;
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y = height * 0.5;
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}
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void draw() {
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background(0);
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angle1 = (mouseX/float(width) - 0.5) * -PI;
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angle2 = (mouseY/float(height) - 0.5) * PI;
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pushMatrix();
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segment(x, y, angle1);
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segment(segLength, 0, angle2);
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popMatrix();
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}
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void segment(float x, float y, float a) {
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translate(x, y);
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rotate(a);
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line(0, 0, segLength, 0);
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}
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