41 lines
1.2 KiB
Java
41 lines
1.2 KiB
Java
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package ch.nuth.zhaw.exbox;
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/**
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* Provides the functionality to draw hilbert curves.
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*/
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public class HilbertServer implements CommandExecutor {
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@Override
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public String execute(String command) {
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int depth = Integer.parseInt(command);
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Turtle turtle = Turtle.instance();
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double dist = 0.8 / (Math.pow(2, depth + 1) - 1);
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turtle.reset(0.1, 0.1);
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hilbert(turtle, depth, dist, -90);
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return turtle.getTrace();
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}
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private void hilbert(Turtle turtle, int depth, double dist, double angle) {
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if (depth > 0) {
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turtle.turn(-angle);
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hilbert(turtle, depth - 1, dist, -angle);
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turtle.move(dist);
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turtle.turn(angle);
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hilbert(turtle, depth - 1, dist, angle);
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turtle.move(dist);
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hilbert(turtle, depth - 1, dist, angle);
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turtle.turn(angle);
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turtle.move(dist);
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hilbert(turtle, depth - 1, dist, -angle);
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turtle.turn(-angle);
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} else {
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turtle.turn(-angle);
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turtle.move(dist);
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turtle.turn(angle);
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turtle.move(dist);
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turtle.turn(angle);
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turtle.move(dist);
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turtle.turn(-angle);
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}
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}
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}
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