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 * * Redistributions in binary form must reproduce the above copyright
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 *   may be used to endorse or promote products derived from this software
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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package jme3test.bullet;

import com.jme3.app.SimpleApplication;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.PhysicsSpace;
import com.jme3.bullet.collision.shapes.*;
import com.jme3.bullet.control.RigidBodyControl;
import com.jme3.math.Plane;
import com.jme3.math.Vector3f;
import com.jme3.scene.Node;
import com.jme3.scene.shape.Sphere;

/**
 * This is a basic Test of jbullet-jme functions
 *
 * @author normenhansen
 */
public class TestSimplePhysics extends SimpleApplication {

    private BulletAppState bulletAppState;

    public static void main(String[] args) {
        TestSimplePhysics app = new TestSimplePhysics();
        app.start();
    }

    @Override
    public void simpleInitApp() {
        bulletAppState = new BulletAppState();
        stateManager.attach(bulletAppState);
        bulletAppState.getPhysicsSpace().enableDebug(assetManager);

        // Add a physics sphere to the world
        Node physicsSphere = PhysicsTestHelper.createPhysicsTestNode(assetManager, new SphereCollisionShape(1), 1);
        physicsSphere.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(3, 6, 0));
        rootNode.attachChild(physicsSphere);
        getPhysicsSpace().add(physicsSphere);

        // Add a physics sphere to the world using the collision shape from sphere one
        Node physicsSphere2 = PhysicsTestHelper.createPhysicsTestNode(assetManager, physicsSphere.getControl(RigidBodyControl.class).getCollisionShape(), 1);
        physicsSphere2.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(4, 8, 0));
        rootNode.attachChild(physicsSphere2);
        getPhysicsSpace().add(physicsSphere2);

        // Add a physics box to the world
        Node physicsBox = PhysicsTestHelper.createPhysicsTestNode(assetManager, new BoxCollisionShape(new Vector3f(1, 1, 1)), 1);
        physicsBox.getControl(RigidBodyControl.class).setFriction(0.1f);
        physicsBox.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(.6f, 4, .5f));
        rootNode.attachChild(physicsBox);
        getPhysicsSpace().add(physicsBox);

        // Add a physics cylinder to the world
        Node physicsCylinder = PhysicsTestHelper.createPhysicsTestNode(assetManager, new CylinderCollisionShape(new Vector3f(1f, 1f, 1.5f)), 1);
        physicsCylinder.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(2, 2, 0));
        rootNode.attachChild(physicsCylinder);
        getPhysicsSpace().add(physicsCylinder);

        // an obstacle mesh, does not move (mass=0)
        Node node2 = PhysicsTestHelper.createPhysicsTestNode(assetManager, new MeshCollisionShape(new Sphere(16, 16, 1.2f)), 0);
        node2.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(2.5f, -4, 0f));
        rootNode.attachChild(node2);
        getPhysicsSpace().add(node2);

        // the floor mesh, does not move (mass=0)
        Node node3 = PhysicsTestHelper.createPhysicsTestNode(assetManager, new PlaneCollisionShape(new Plane(new Vector3f(0, 1, 0), 0)), 0);
        node3.getControl(RigidBodyControl.class).setPhysicsLocation(new Vector3f(0f, -6, 0f));
        rootNode.attachChild(node3);
        getPhysicsSpace().add(node3);

        // Join the physics objects with a Point2Point joint
//        PhysicsPoint2PointJoint joint=new PhysicsPoint2PointJoint(physicsSphere, physicsBox, new Vector3f(-2,0,0), new Vector3f(2,0,0));
//        PhysicsHingeJoint joint=new PhysicsHingeJoint(physicsSphere, physicsBox, new Vector3f(-2,0,0), new Vector3f(2,0,0), Vector3f.UNIT_Z,Vector3f.UNIT_Z);
//        getPhysicsSpace().add(joint);

    }

    private PhysicsSpace getPhysicsSpace() {
        return bulletAppState.getPhysicsSpace();
    }
}