Java PolygonShape.setAsEdge方法代码示例

import org.jbox2d.collision.shapes.PolygonShape; //导入方法依赖的package包/类
/**
 * @see org.jbox2d.testbed.framework.TestbedTest#initTest()
 */
@Override
public void initTest() {
	Body ground = null;
	{
		BodyDef bd = new BodyDef();
		ground = m_world.createBody(bd);

		PolygonShape shape = new PolygonShape();
		shape.setAsEdge(new Vec2(50.0f, 0.0f), new Vec2(-50.0f, 0.0f));
		ground.createFixture(shape, 0.0f);
	}

	{
		CircleShape circle1 = new CircleShape();
		circle1.m_radius = 1.0f;

		CircleShape circle2 = new CircleShape();
		circle2.m_radius = 2.0f;
		
		PolygonShape box = new PolygonShape();
		box.setAsBox(0.5f, 5.0f);

		BodyDef bd1 = new BodyDef();
		bd1.type = BodyType.DYNAMIC;
		bd1.position.set(-3.0f, 12.0f);
		Body body1 = m_world.createBody(bd1);
		body1.createFixture(circle1, 5.0f);

		RevoluteJointDef jd1 = new RevoluteJointDef();
		jd1.bodyA = ground;
		jd1.bodyB = body1;
		jd1.localAnchorA = ground.getLocalPoint(bd1.position);
		jd1.localAnchorB = body1.getLocalPoint(bd1.position);
		jd1.referenceAngle = body1.getAngle() - ground.getAngle();
		m_joint1 = (RevoluteJoint)m_world.createJoint(jd1);

		BodyDef bd2 = new BodyDef();
		bd2.type = BodyType.DYNAMIC;
		bd2.position.set(0.0f, 12.0f);
		Body body2 = m_world.createBody(bd2);
		body2.createFixture(circle2, 5.0f);

		RevoluteJointDef jd2 = new RevoluteJointDef();
		jd2.initialize(ground, body2, bd2.position);
		m_joint2 = (RevoluteJoint)m_world.createJoint(jd2);

		BodyDef bd3 = new BodyDef();
		bd3.type = BodyType.DYNAMIC;
		bd3.position.set(2.5f, 12.0f);
		Body body3 = m_world.createBody(bd3);
		body3.createFixture(box, 5.0f);

		PrismaticJointDef jd3 = new PrismaticJointDef();
		jd3.initialize(ground, body3, bd3.position, new Vec2(0.0f, 1.0f));
		jd3.lowerTranslation = -5.0f;
		jd3.upperTranslation = 5.0f;
		jd3.enableLimit = true;

		m_joint3 = (PrismaticJoint)m_world.createJoint(jd3);

		GearJointDef jd4 = new GearJointDef();
		jd4.bodyA = body1;
		jd4.bodyB = body2;
		jd4.joint1 = m_joint1;
		jd4.joint2 = m_joint2;
		jd4.ratio = circle2.m_radius / circle1.m_radius;
		m_joint4 = (GearJoint)m_world.createJoint(jd4);

		GearJointDef jd5 = new GearJointDef();
		jd5.bodyA = body2;
		jd5.bodyB = body3;
		jd5.joint1 = m_joint2;
		jd5.joint2 = m_joint3;
		jd5.ratio = -1.0f / circle2.m_radius;
		m_joint5 = (GearJoint)m_world.createJoint(jd5);
	}
}
 

import org.jbox2d.collision.shapes.PolygonShape; //导入方法依赖的package包/类
public PeaWorld(GroupLayer scaledLayer) {
  staticLayerBack = graphics().createGroupLayer();
  scaledLayer.add(staticLayerBack);
  dynamicLayer = graphics().createGroupLayer();
  scaledLayer.add(dynamicLayer);
  staticLayerFront = graphics().createGroupLayer();
  scaledLayer.add(staticLayerFront);
  
  // create the physics world
  Vec2 gravity = new Vec2(0.0f, 10.0f);
  world = new World(gravity, true);
  world.setWarmStarting(true);
  world.setAutoClearForces(true);
  world.setContactListener(this);

  // create the ground
  Body ground = world.createBody(new BodyDef());
  PolygonShape groundShape = new PolygonShape();
  groundShape.setAsEdge(new Vec2(0, height), new Vec2(width, height));
  ground.createFixture(groundShape, 0.0f);

  // create the walls
  Body wallLeft = world.createBody(new BodyDef());
  PolygonShape wallLeftShape = new PolygonShape();
  wallLeftShape.setAsEdge(new Vec2(0, 0), new Vec2(0, height));
  wallLeft.createFixture(wallLeftShape, 0.0f);
  Body wallRight = world.createBody(new BodyDef());
  PolygonShape wallRightShape = new PolygonShape();
  wallRightShape.setAsEdge(new Vec2(width, 0), new Vec2(width, height));
  wallRight.createFixture(wallRightShape, 0.0f);

  if (showDebugDraw) {
    CanvasLayer canvasLayer =
        graphics().createCanvasLayer((int) (width / Peas.physUnitPerScreenUnit),
            (int) (height / Peas.physUnitPerScreenUnit));
    graphics().rootLayer().add(canvasLayer);
    debugDraw = new DebugDrawBox2D();
    debugDraw.setCanvas(canvasLayer);
    debugDraw.setFlipY(false);
    debugDraw.setStrokeAlpha(150);
    debugDraw.setFillAlpha(75);
    debugDraw.setStrokeWidth(2.0f);
    debugDraw.setFlags(DebugDraw.e_shapeBit | DebugDraw.e_jointBit | DebugDraw.e_aabbBit);
    debugDraw.setCamera(0, 0, 1f / Peas.physUnitPerScreenUnit);
    world.setDebugDraw(debugDraw);
  }
}
 

import org.jbox2d.collision.shapes.PolygonShape; //导入方法依赖的package包/类
/**
 * @see org.jbox2d.testbed.framework.TestbedTest#initTest(boolean)
 */
@Override
public void initTest(boolean argDeserialized) {
	Body ground = null;
	{
		BodyDef bd = new BodyDef();
		ground = getWorld().createBody(bd);

		PolygonShape shape = new PolygonShape();
		shape.setAsEdge(new Vec2(50.0f, 0.0f), new Vec2(-50.0f, 0.0f));
		ground.createFixture(shape, 0.0f);
	}

	{
		CircleShape circle1 = new CircleShape();
		circle1.m_radius = 1.0f;

		CircleShape circle2 = new CircleShape();
		circle2.m_radius = 2.0f;
		
		PolygonShape box = new PolygonShape();
		box.setAsBox(0.5f, 5.0f);

		BodyDef bd1 = new BodyDef();
		bd1.type = BodyType.DYNAMIC;
		bd1.position.set(-3.0f, 12.0f);
		Body body1 = getWorld().createBody(bd1);
		body1.createFixture(circle1, 5.0f);

		RevoluteJointDef jd1 = new RevoluteJointDef();
		jd1.bodyA = ground;
		jd1.bodyB = body1;
		jd1.localAnchorA = ground.getLocalPoint(bd1.position);
		jd1.localAnchorB = body1.getLocalPoint(bd1.position);
		jd1.referenceAngle = body1.getAngle() - ground.getAngle();
		m_joint1 = (RevoluteJoint)getWorld().createJoint(jd1);

		BodyDef bd2 = new BodyDef();
		bd2.type = BodyType.DYNAMIC;
		bd2.position.set(0.0f, 12.0f);
		Body body2 = getWorld().createBody(bd2);
		body2.createFixture(circle2, 5.0f);

		RevoluteJointDef jd2 = new RevoluteJointDef();
		jd2.initialize(ground, body2, bd2.position);
		m_joint2 = (RevoluteJoint)getWorld().createJoint(jd2);

		BodyDef bd3 = new BodyDef();
		bd3.type = BodyType.DYNAMIC;
		bd3.position.set(2.5f, 12.0f);
		Body body3 = getWorld().createBody(bd3);
		body3.createFixture(box, 5.0f);

		PrismaticJointDef jd3 = new PrismaticJointDef();
		jd3.initialize(ground, body3, bd3.position, new Vec2(0.0f, 1.0f));
		jd3.lowerTranslation = -5.0f;
		jd3.upperTranslation = 5.0f;
		jd3.enableLimit = true;

		m_joint3 = (PrismaticJoint)getWorld().createJoint(jd3);

		GearJointDef jd4 = new GearJointDef();
		jd4.bodyA = body1;
		jd4.bodyB = body2;
		jd4.joint1 = m_joint1;
		jd4.joint2 = m_joint2;
		jd4.ratio = circle2.m_radius / circle1.m_radius;
		m_joint4 = (GearJoint)getWorld().createJoint(jd4);

		GearJointDef jd5 = new GearJointDef();
		jd5.bodyA = body2;
		jd5.bodyB = body3;
		jd5.joint1 = m_joint2;
		jd5.joint2 = m_joint3;
		jd5.ratio = -1.0f / circle2.m_radius;
		m_joint5 = (GearJoint)getWorld().createJoint(jd5);
	}
}