Java ChainShape.createLoop方法代码示例

import com.badlogic.gdx.physics.box2d.ChainShape; //导入方法依赖的package包/类
@Override
protected Body createBody(final Box2DService box2d) {
    final BodyDef bodyDef = new BodyDef();
    bodyDef.type = BodyType.StaticBody;
    bodyDef.fixedRotation = true;

    final ChainShape shape = new ChainShape();
    final float w = Box2DUtil.WIDTH * 2f / 5f, h = Box2DUtil.HEIGHT * 2f / 5f;
    shape.createLoop(new float[] { -w, -h, -w, h, w, h, w, -h });
    final FixtureDef fixtureDef = new FixtureDef();
    fixtureDef.restitution = 0.9f;
    fixtureDef.friction = 0.2f;
    fixtureDef.shape = shape;
    fixtureDef.filter.categoryBits = Box2DUtil.CAT_BOUNDS;
    fixtureDef.filter.maskBits = Box2DUtil.MASK_BLOCK;
    final Body body = box2d.getWorld().createBody(bodyDef);
    body.createFixture(fixtureDef);
    return body;
}
 

import com.badlogic.gdx.physics.box2d.ChainShape; //导入方法依赖的package包/类
private void createPhysicsWorld() {

		world = new World(new Vector2(0, 0), true);
		
		float halfWidth = viewportWidth / 2f;
		ChainShape chainShape = new ChainShape();
		chainShape.createLoop(new Vector2[] {
				new Vector2(-halfWidth, 0f),
				new Vector2(halfWidth, 0f),
				new Vector2(halfWidth, viewportHeight),
				new Vector2(-halfWidth, viewportHeight) });
		BodyDef chainBodyDef = new BodyDef();
		chainBodyDef.type = BodyType.StaticBody;
		groundBody = world.createBody(chainBodyDef);
		groundBody.createFixture(chainShape, 0);
		chainShape.dispose();
		createBoxes();
	}
 

import com.badlogic.gdx.physics.box2d.ChainShape; //导入方法依赖的package包/类
public Body createScreenBox(final Rectangle rect) {
    ChainShape shape = new ChainShape();
    shape.createLoop(new Vector2[]{
            new Vector2(rect.x, rect.y).scl(1 / Box2dObject.RADIO),
            new Vector2(rect.x + rect.width, rect.y).scl(1 / Box2dObject.RADIO),
            new Vector2(rect.x + rect.width, rect.y + rect.height).scl(1 / Box2dObject.RADIO),
            new Vector2(rect.x, rect.y + rect.height).scl(1 / Box2dObject.RADIO),
    });

    final FixtureDef fixtureDef = new FixtureDef();
    fixtureDef.isSensor = false;
    fixtureDef.shape = shape;

    BodyDef bodyDef = new BodyDef();
    bodyDef.bullet = false;
    bodyDef.type = BodyType.StaticBody;
    bodyDef.linearDamping = 0f;

    Body body = PhysicalWorld.WORLD.createBody(bodyDef);
    body.createFixture(fixtureDef);
    shape.dispose();
    return body;
}
 

import com.badlogic.gdx.physics.box2d.ChainShape; //导入方法依赖的package包/类
public Bounds (World world, float hWidth, float hHeight) {
	bodyDef = new BodyDef();
	bodyDef.type = BodyType.StaticBody;
	
	body = world.createBody(bodyDef);
	ChainShape shape = new ChainShape();
	Vector2[] vertices = {new Vector2(-hWidth, -hHeight), new Vector2(-hWidth, hHeight), new Vector2(hWidth, hHeight), new Vector2(hWidth, -hHeight)};
	shape.createLoop(vertices);
	body.createFixture(shape, 0);
	
	shape.dispose();
	
	body.setUserData("bounds");
}
 

import com.badlogic.gdx.physics.box2d.ChainShape; //导入方法依赖的package包/类
public static Body randomCircleBody(World world,Vector2 position,float dX,float dY,float minY,float maxY,int randomness){	
	//TODO: Should use a logger class here
	if (360%dX != 0) System.out.println("Creating random planet: dx must be multiple of 360");
	
	assert(360%dX == 0); // must be multiple of 360
	int steps = (int) (360 / dX)-1;
	Random rand = new Random();
	float prevElevation = (minY + maxY) / 2;
	
	boolean randomModeToggle = false;
	ArrayList<Vector2> verts = new ArrayList<Vector2>();
	
	for (int x = 1; x < steps; x++){
		Vector2 h = new Vector2();
		if (randomModeToggle)
			h.set(0,rand.nextFloat() * (maxY - minY) + minY);
		else
			h.set(0,getRandomElevation(prevElevation,dY,minY,maxY));
		
		if (randomness!=0){
			if (x%randomness == 0){
				randomModeToggle = !randomModeToggle;
			}
		}
		
		prevElevation = h.y;
		h.rotate(x * dX);
		verts.add(h);
	}
	
	ChainShape shape = new ChainShape();
	float[] fVerts = new float[verts.size() * 2];
	for (int x=0; x < verts.size(); x++){
		fVerts[x*2] = verts.get(x).x;
		fVerts[(x*2) + 1] = verts.get(x).y;
	}
	shape.createLoop(fVerts);

	FixtureDef fd = new FixtureDef();
	fd.density = 10;
	fd.friction = 10;
	fd.restitution = 0f;
	fd.shape = shape;
	
	BodyDef bd = new BodyDef();
	bd.type = BodyDef.BodyType.StaticBody;
	bd.position.set(position);
	
	Body body = world.createBody(bd);
	body.createFixture(fd);
	return body;
}