[LIBGDX学习]LibGDX代码详解（十二）Box2D

最新推荐文章于 2021-11-19 21:37:05 发布

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本文介绍了一个使用LibGDX实现的SphereStack测试案例，该案例通过创建一系列堆叠的圆形物体来演示Box2D物理引擎的行为。文章详细解释了如何定义圆形物体的位置、半径及动态属性，并展示了如何利用EdgeShape创建地面边界。

libgdx官方tests详解

package com.mygdx.game.box2d;

import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.physics.box2d.Body;
import com.badlogic.gdx.physics.box2d.BodyDef;
import com.badlogic.gdx.physics.box2d.BodyDef.BodyType;
import com.badlogic.gdx.physics.box2d.CircleShape;
import com.badlogic.gdx.physics.box2d.EdgeShape;
import com.badlogic.gdx.physics.box2d.World;

public class SphereStack extends Box2DTest {
	int e_count = 50;//ori:10

	@Override
	protected void createWorld (World world) {
		{
			BodyDef bd = new BodyDef();
			Body ground = world.createBody(bd);

			EdgeShape shape = new EdgeShape();
			shape.set(new Vector2(-40, 0), new Vector2(40, 0));
			ground.createFixture(shape, 0);// 创建存在物
			shape.dispose();
		}

		{
			CircleShape shape = new CircleShape();
			shape.setRadius(0.3f);// ori 1.0f

			for (int i = 0; i < e_count; i++) {
				BodyDef bd = new BodyDef();
				bd.type = BodyType.DynamicBody;
				bd.position.set(0, 4.0f + 3.0f * i);
				Body body = world.createBody(bd);
				body.createFixture(shape, 1.0f);
			}

			shape.dispose();// 一个形状共享一堆body
		}

	}

}