50 lines
913 B
Plaintext
50 lines
913 B
Plaintext
// The Nature of Code
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// Daniel Shiffman
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// http://natureofcode.com
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// A random walker class!
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class Walker {
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PVector position;
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ArrayList<PVector> history;
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Walker() {
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position = new PVector(width/2, height/2);
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history = new ArrayList<PVector>();
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}
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void display() {
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stroke(0);
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fill(175);
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rectMode(CENTER);
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rect(position.x, position.y, 16, 16);
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beginShape();
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stroke(0);
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noFill();
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for (PVector v: history) {
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vertex(v.x, v.y);
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}
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endShape();
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}
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// Randomly move up, down, left, right, or stay in one place
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void walk() {
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PVector vel = new PVector(random(-2, 2), random(-2, 2));
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position.add(vel);
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// Stay on the screen
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position.x = constrain(position.x, 0, width-1);
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position.y = constrain(position.y, 0, height-1);
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history.add(position.get());
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if (history.size() > 1000) {
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history.remove(0);
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}
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}
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}
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