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POJmonkey Collision Detection
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  1. POJmonkey Collision Detection
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    copied!<p>I am new to Jmonkey programming and I would like to ask a question about collision interaction as my code seems to finds collisions possibly from the terrain and i do not know how to solve this out. My goal is player as a first person to be detected if he collides with an enemie's ghost control to display a message as an output. My code displays a continues collision and then it crashes... </p> <pre><code>package test; //imports... public class test extends SimpleApplication implements ActionListener,PhysicsTickListener{ private MotionPath path; private MotionPath path2; private MotionTrack motionTrack; private MotionTrack motionTrack2; private AnimChannel channel2; private AnimControl control2; private AnimControl control3; private AnimChannel channel3; private BulletAppState bulletAppState; private RigidBodyControl landscape; private CharacterControl player; private Vector3f walkDirection = new Vector3f(); private boolean left = false, right = false, up = false, down = false; private TerrainQuad terrain; private Material mat_terrain; private GhostControl ghost; static test app; Material matMarker; public static void main(String[] args) { app = new test(); app.start(); } float displacement=60; int score = 0; int robotHealth=0; Geometry mark; Node shootables; Node pickUpObject1; BitmapText hudText; @Override public void simpleInitApp() { createScene(); enemies(); pickUptype1(); initCrossHairs(); // a "+" in the middle of the screen to help aiming initKeys(); // load custom key mappings initMark(); // a red sphere to mark the hit hudText = new BitmapText(guiFont, false); hudText.setSize(guiFont.getCharSet().getRenderedSize()); // font size hudText.setColor(ColorRGBA.Red); // font color hudText.setLocalTranslation(600, 700, 0); // position guiNode.attachChild(hudText); DirectionalLight sun2 = new DirectionalLight(); sun2.setDirection(new Vector3f(-0.1f, -0.7f, -1.0f)); int width = settings.getWidth(); //width is the width of the gui int height = settings.getHeight(); //height is the height of the gui } protected Geometry makeCube(String name, float x, float y, float z) { Box box = new Box(new Vector3f(x, y, z), 3f, 3f, 3f); Geometry cube = new Geometry(name, box); Material mat1 = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); Texture tex_ml = assetManager.loadTexture("Interface/Logo/Monkey.jpg"); mat1.setTexture("ColorMap", tex_ml); cube.setMaterial(mat1); return cube; } private PhysicsSpace getPhysicsSpace() { return bulletAppState.getPhysicsSpace(); } /** * This is the main event loop--walking happens here. * We check in which direction the player is walking by interpreting * the camera direction forward (camDir) and to the side (camLeft). * The setWalkDirection() command is what lets a physics-controlled player walk. * We also make sure here that the camera moves with player. */ @Override public void simpleUpdate(float tpf) { hudText.setText("SCORE \n" + " " + score);// the text Vector3f camDir = cam.getDirection().clone().multLocal(0.6f); Vector3f camLeft = cam.getLeft().clone().multLocal(0.4f); walkDirection.set(0, 0, 0); if (left) { walkDirection.addLocal(camLeft); } if (right) { walkDirection.addLocal(camLeft.negate()); } if (up) { walkDirection.addLocal(camDir); } if (down) { walkDirection.addLocal(camDir.negate()); } player.setWalkDirection(walkDirection); cam.setLocation(player.getPhysicsLocation()); path.setCycle(true); // Make path a complete circuit path2.setCycle(true); motionTrack.setLoopMode(LoopMode.Loop); motionTrack2.setLoopMode(LoopMode.Loop); } public Node robot(){ Node monster = (Node) assetManager.loadModel("Models/Oto/Oto.mesh.xml"); monster.scale(1.5f, 1.5f, 1.5f); monster.rotate(0.0f, -3.0f, 0.0f); // Create a appropriate physical shape for it return monster; } public void createScene(){ /** Set up Physics */ bulletAppState = new BulletAppState(); stateManager.attach(bulletAppState); //bulletAppState.getPhysicsSpace().enableDebug(assetManager); flyCam.setMoveSpeed(100); setUpKeys(); terrain = new TerrainQuad("my terrain", 65, 513, heightmap.getHeightMap()); /** 6. Add physics: */ // We set up collision detection for the scene by creating a // compound collision shape and a static RigidBodyControl with mass zero.*/ CollisionShape terrainShape = CollisionShapeFactory.createMeshShape((Node) terrain); landscape = new RigidBodyControl(terrainShape, 0); terrain.addControl(landscape); CapsuleCollisionShape capsuleShape = new CapsuleCollisionShape(1.5f, 6f, 1); player = new CharacterControl(capsuleShape, 0.05f); player.setJumpSpeed(20); player.setFallSpeed(30); player.setGravity(30); player.setPhysicsLocation(new Vector3f(145f, -28f, 10f)); player.setCollisionGroup(PhysicsCollisionObject.COLLISION_GROUP_01); player.addCollideWithGroup(PhysicsCollisionObject.COLLISION_GROUP_01); setUpLight(); rootNode.attachChild(SkyFactory.createSky( assetManager, "Textures/Sky/Bright/BrightSky.dds", false)); } public void enemies(){ shootables = new Node("Shootables"); rootNode.attachChild(shootables); Node Robot1 = robot(); Node Robot2 = robot(); CapsuleCollisionShape capsule = new CapsuleCollisionShape(4f, 10f); RigidBodyControl robot1Cap = new RigidBodyControl(capsule, 0.01f); Robot1.addControl(robot1Cap); getPhysicsSpace().add(robot1Cap); bulletAppState.getPhysicsSpace().add(robot1Cap); bulletAppState.getPhysicsSpace().enableDebug(assetManager); robot1Cap.setMass(100f); robot1Cap.setKinematic(true); CapsuleCollisionShape capsule2 = new CapsuleCollisionShape(4f, 10f); RigidBodyControl robot2Cap = new RigidBodyControl(capsule, 0.01f); Robot2.addControl(robot2Cap); getPhysicsSpace().add(robot2Cap); bulletAppState.getPhysicsSpace().add(robot2Cap); bulletAppState.getPhysicsSpace().enableDebug(assetManager); robot2Cap.setMass(100f); robot2Cap.setKinematic(true); ghost = new GhostControl( new BoxCollisionShape(new Vector3f(8f,8f,8f))); // a box-shaped ghost Robot1.addControl(ghost); ghost.setCollisionGroup(PhysicsCollisionObject.COLLISION_GROUP_01); ghost.setCollideWithGroups(PhysicsCollisionObject.COLLISION_GROUP_01); getPhysicsSpace().add(ghost); getPhysicsSpace().addTickListener(this); control2 = Robot1.getControl(AnimControl.class); channel2 = control2.createChannel(); channel2.setAnim("Walk"); control3 = Robot2.getControl(AnimControl.class); channel3 = control3.createChannel(); channel3.setAnim("Walk"); path = new MotionPath(); path.addWayPoint(new Vector3f(500f,-83f,3f)); path.addWayPoint(new Vector3f(350f,-79f, 3f)); path.enableDebugShape(assetManager,rootNode); // Initialize our motionTrack object motionTrack = new MotionTrack(Robot1, path); motionTrack.setDirectionType(MotionTrack.Direction.Path); // Enable the motionTrack motionTrack.setEnabled(true); path2 = new MotionPath(); path2.addWayPoint(new Vector3f(180f,-50f,-100f)); path2.addWayPoint(new Vector3f(200f, -55f, -30f)); path2.enableDebugShape(assetManager,rootNode); // Initialize our motionTrack object motionTrack2 = new MotionTrack(Robot2, path2); motionTrack2.setDirectionType(MotionTrack.Direction.Path); // Enable the motionTrack motionTrack2.setEnabled(true); shootables.attachChild(Robot1); shootables.attachChild(Robot2); } public void physicsTick(PhysicsSpace space, float f) { if (ghost.getOverlappingObjects().size() &gt; 0) { final Vector3f bPoint = ghost.getPhysicsLocation(); try { app.enqueue(new Callable&lt;Boolean&gt;() { public Boolean call() throws Exception { app.addMarker(bPoint); return true; } }); } catch (Exception ex) { } } } public void pickUptype1(){ pickUpObject1 = new Node("pickUpObject1"); rootNode.attachChild(pickUpObject1); Node cube1 = new Node(); cube1.attachChild(makeCube("the Deputy", 220f, -63f, -150f)); Node cube2 = new Node(); cube2.attachChild(makeCube("the Deputy2", 410f, -89f, -270f)); RigidBodyControl floor_phy = new RigidBodyControl(0.0f); cube1.addControl(floor_phy); RigidBodyControl floor_phy2 = new RigidBodyControl(0.0f); cube2.addControl(floor_phy2); bulletAppState.getPhysicsSpace().add(floor_phy); bulletAppState.getPhysicsSpace().add(floor_phy2); pickUpObject1.attachChild(cube1); pickUpObject1.attachChild(cube2); } } </code></pre>
 

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