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転がる円

円を移動させます。

TestMyHypoCycloid02.java

import java.awt.Color;
import java.awt.Graphics2D;

import myMath.MyCircle;
import myMath.MyHypoCycloid;
import myMath.Tpl10;

public class TestMyHypoCycloid02 extends Tpl10 {

	int t = 0;
	double rc = 2.5; // 定円
	double rm = 1.0; // 動円

	public void init() {
		tr.move(getWidth() / 2, getHeight() / 2);
		tr.set(1,0,0,-1);
		tr.scale(40);
		setTimer(10);
	}

	public void draw(Graphics2D g2) {
		double x;
		MyHypoCycloid mp = new MyHypoCycloid();
		MyCircle mc = new MyCircle();

		x = Math.toRadians(t);
		mp.set(rc, rm);
		mc.set(0, 0, rc - rm);

		g2.setColor(Color.black);

		// 定円
		g2.setColor(Color.blue);
		g2.draw(tr.Circle(mc.x, mc.y, rc));
		// 動円
		g2.setColor(Color.green);
		mc.p(x);
		g2.draw(tr.Circle(mc.x, mc.y, rm));

		draw(mp, 0, x);

		if (t > 360 * 2) {
			t = 0;
		}
		t++;
	}
}

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