ShapeCollisionTest.java

/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.tests.box2d;

import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.*;
import com.badlogic.gdx.physics.box2d.BodyDef.BodyType;

import java.util.Arrays;

public class ShapeCollisionTest extends Box2DTest {

	Body b1;
	Body b2;

	@Override
	protected void createWorld (World world) {
		{
			EdgeShape shape = new EdgeShape();
			shape.set(new Vector2(-40.0f, 0), new Vector2(40, 0));

			FixtureDef fd = new FixtureDef();
			fd.shape = shape;
			fd.friction = 0.3f;

			BodyDef bd = new BodyDef();
			Body ground = world.createBody(bd);
			ground.createFixture(fd);
			shape.dispose();
		}

		{
			PolygonShape shape = new PolygonShape();
			shape.setAsBox(1, 2f);

			EdgeShape edgeShape = new EdgeShape();
			edgeShape.set(new Vector2(-10f, 0), new Vector2(10.0f, 0));

			CircleShape circleShape = new CircleShape();
			circleShape.setRadius(2f);

			BodyDef def = new BodyDef();
			def.position.y = 10;
			def.angle = (float)Math.toRadians(90);
			def.type = BodyType.DynamicBody;

			FixtureDef fixtureDef = new FixtureDef();
			fixtureDef.isSensor = true;
			fixtureDef.density = 1f;

			Body body = world.createBody(def);
			fixtureDef.shape = shape;
			body.createFixture(fixtureDef);
			fixtureDef.shape = edgeShape;
			body.createFixture(fixtureDef);
			fixtureDef.shape = circleShape;
			body.createFixture(fixtureDef);
			b1 = body;

			def = new BodyDef();
			def.position.x = 10;
			def.position.y = 10;
			def.angle = 0;
			def.type = BodyType.DynamicBody;

			body = world.createBody(def);
			body.createFixture(shape, 1);
			body.createFixture(circleShape, 1);
			body.createFixture(edgeShape, 1);
			b2 = body;

			shape.dispose();
			circleShape.dispose();
			edgeShape.dispose();
		}

	}

	@Override
	public void render() {
		super.render();

		//Transform t1 = new Transform(b1.getTransform());
		//Transform t2 = new Transform(b2.getTransform());
		Transform t1 = b1.getTransform();
		Transform t2 = b2.getTransform();

		// generic overlap test (polygons)
		System.out.println("testOverlap (polygons): " + Collision.testOverlap(
				b1.getFixtureList().get(0).getShape(),
				0,
				b2.getFixtureList().get(0).getShape(),
				0,
				t1, t2
		));

		// polygon-polygon
		Manifold m = Collision.collidePolygons(
				(PolygonShape) b1.getFixtureList().get(0).getShape(),
				t1,
				(PolygonShape) b2.getFixtureList().get(0).getShape(),
				t2
		);
		System.out.println("Polygon-polygon: " + m.getPointCount() + "; " + m.getLocalPoint() + "; " + Arrays.toString(m.getPoints()));

		// polygon-edge
		m = Collision.collideEdgeAndPolygon(
				(EdgeShape) b1.getFixtureList().get(1).getShape(),
				t1,
				(PolygonShape) b2.getFixtureList().get(0).getShape(),
				t2
		);
		System.out.println("Polygon-edge: " + m.getPointCount() + "; " + m.getLocalPoint() + "; " + Arrays.toString(m.getPoints()));

		// polygon-circle
		m = Collision.collidePolygonAndCircle(
				(PolygonShape) b2.getFixtureList().get(0).getShape(),
				t2,
				(CircleShape) b1.getFixtureList().get(2).getShape(),
				t1
		);
		System.out.println("Polygon-circle: " + m.getPointCount() + "; " + m.getLocalPoint() + "; " + Arrays.toString(m.getPoints()));

		// circle-circle
		m = Collision.collideCircles(
				(CircleShape) b1.getFixtureList().get(2).getShape(),
				t1,
				(CircleShape) b2.getFixtureList().get(1).getShape(),
				t2
		);
		System.out.println("Circle-circle: " + m.getPointCount() + "; " + m.getLocalPoint() + "; " + Arrays.toString(m.getPoints()));

		// circle-edge
		m = Collision.collideEdgeAndCircle(
				(EdgeShape) b2.getFixtureList().get(2).getShape(),
				t2,
				(CircleShape) b1.getFixtureList().get(2).getShape(),
				t1
		);
		System.out.println("Circle-edge: " + m.getPointCount() + "; " + m.getLocalPoint() + "; " + Arrays.toString(m.getPoints()));
	}
}