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examples/zm_generative/BouncingLine.java

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+import schule.ngb.zm.Vector;
+import schule.ngb.zm.Zeichenmaschine;
+
+public class BouncingLine extends Zeichenmaschine {
+
+	public static void main( String[] args ) {
+		new BouncingLine();
+	}
+
+	private Vector start, end, dStart, dEnd;
+
+	private int r, g, b;
+
+	private boolean mouseFollow = false;
+
+	public BouncingLine() {
+		super(800, 800, "Bouncing Lines");
+	}
+
+	@Override
+	public void setup() {
+		start = Vector.random(0, width, 0, height);
+		end = Vector.random(0, width, 0, height);
+		dStart = Vector.random(-5, 5);
+		dEnd = Vector.random(-5, 5);
+
+		r = random(255);
+		g = random(255);
+		b = random(255);
+	}
+
+	@Override
+	public void update( double delta ) {
+		start.add(dStart);
+		end.add(dEnd);
+
+		if( start.x > width || start.x < 0 ) {
+			dStart.x *= -1;
+		}
+		if( end.x > width || end.x < 0 ) {
+			dEnd.x *= -1;
+		}
+		if( start.y > width || start.y < 0 ) {
+			dStart.y *= -1;
+		}
+		if( end.y > width || end.y < 0 ) {
+			dEnd.y *= -1;
+		}
+
+		r += limit(random(-5, 5), 0, 255);
+		g += limit(random(-5, 5), 0, 255);
+		b += limit(random(-5, 5), 0, 255);
+	}
+
+	@Override
+	public void draw() {
+		drawing.setStrokeColor(r, g, b);
+		drawing.line(start.x, start.y, end.x, end.y);
+		// bezier(0, 0, startX, startY, endX, endY, width, height);
+	}
+
+	@Override
+	public void mouseClicked() {
+		mouseFollow = !mouseFollow;
+	}
+
+	@Override
+	public void mouseMoved() {
+		if( mouseFollow ) {
+			dStart = new Vector(mouseX - start.x, mouseY - start.y);
+			dStart.setLength(5);
+			dEnd = new Vector(mouseX - end.x, mouseY - end.y);
+			dEnd.setLength(5);
+		}
+	}
+
+}