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 * Copyright (c) 2019 jMonkeyEngine
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package jme3test.bullet;

import com.jme3.app.Application;
import com.jme3.app.SimpleApplication;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.PhysicsSpace;
import com.jme3.bullet.collision.PhysicsCollisionEvent;
import com.jme3.bullet.collision.PhysicsCollisionListener;
import com.jme3.bullet.collision.shapes.CollisionShape;
import com.jme3.bullet.collision.shapes.SphereCollisionShape;
import com.jme3.bullet.objects.PhysicsGhostObject;
import com.jme3.bullet.objects.PhysicsRigidBody;

/**
 * Test case for JME issue #1029: sphere-sphere collisions not reported.
 * <p>
 * If successful, the app will terminate normally, without a RuntimeException.
 *
 * @author Stephen Gold sgold@sonic.net
 */
public class TestIssue1029
        extends SimpleApplication
        implements PhysicsCollisionListener {

    private double elapsedSeconds = 0.0;

    public static void main(String[] arguments) {
        Application application = new TestIssue1029();
        application.start();
    }

    @Override
    public void simpleInitApp() {
        BulletAppState bulletAppState = new BulletAppState();
        stateManager.attach(bulletAppState);
        bulletAppState.setDebugEnabled(true);

        PhysicsSpace physicsSpace = bulletAppState.getPhysicsSpace();
        physicsSpace.addCollisionListener(this);

        CollisionShape shape;
        shape = new SphereCollisionShape(1f);
        //shape = new BoxCollisionShape(new Vector3f(1f, 1f, 1f));

        PhysicsRigidBody staticBody = new PhysicsRigidBody(shape, 0f);
        physicsSpace.add(staticBody);

        PhysicsGhostObject ghost = new PhysicsGhostObject(shape);
        physicsSpace.add(ghost);
    }

    @Override
    public void simpleUpdate(float tpf) {
        super.simpleUpdate(tpf);

        elapsedSeconds += tpf;
        if (elapsedSeconds > 1.0) {
            throw new RuntimeException("No collisions reported!");
        }
    }

    @Override
    public void collision(PhysicsCollisionEvent event) {
        Class aClass = event.getObjectA().getCollisionShape().getClass();
        String aShape = aClass.getSimpleName().replace("CollisionShape", "");
        Class bClass = event.getObjectB().getCollisionShape().getClass();
        String bShape = bClass.getSimpleName().replace("CollisionShape", "");

        System.out.printf("%s-%s collision reported at t = %f sec%n",
                aShape, bShape, elapsedSeconds);
        stop();
    }
}