40 lines
1.1 KiB
Java
40 lines
1.1 KiB
Java
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package ch.nuth.zhaw.exbox;
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/**
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* Provides the functionality to draw a snowflake.
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*/
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public class SnowflakeServer implements CommandExecutor {
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@Override
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public String execute(String command) {
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int recursionLevel = Integer.parseInt(command);
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Turtle turtle = Turtle.instance();
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drawSnowflake(turtle, recursionLevel);
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return turtle.getTrace();
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}
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public void drawSnowflake(Turtle turtle, int recursionLevel) {
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turtle.reset(0.1, 0.266);
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turtle.turn(60);
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for (int i = 0; i < 3; i++) {
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drawLine(turtle, recursionLevel, 0.8);
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turtle.turn(-120);
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}
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}
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public void drawLine(Turtle turtle, int recursionLevel, double destination) {
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if (recursionLevel == 0) {
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turtle.move(destination);
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} else {
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double distance = destination / 3;
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for (int i = 0; i < 3; i++) {
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drawLine(turtle, recursionLevel - 1, distance);
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turtle.turn(i % 2 == 0 ? 60 : -120);
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}
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drawLine(turtle, recursionLevel - 1, distance);
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}
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}
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}
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