Away3D Forum Strange collision problem :(

Maniek, Newbie
Posted: 19 October 2011 03:54 PM Total Posts: 4

I have a question: when i add rigidbody(ball) to _view.scene directly, collisions work, everything is ok. But when i add rigidbody to ObjectContainer3D(car) (because i need local coordinates of ball), physics cannot detect collisions. My rigidbody has always the same position, even if i move ObjectContainer!

To picture the problem:

I’m driving a car in various directions (x axis, z axis) and I want a ball that’s moving 25 pixels to the right of the car to collide (the ball collides but the car doesn’t)

Question: I need local coordinates and collisions of my rigidbody. How can i add this rigidbody to other container (or other rigidbody?!)

Sorry for shitty english

Yang Li, Administrator
Posted: 20 October 2011 01:07 AM Total Posts: 80 [ # 1 ]

you can use AWPCompoundShape, look CompoundShapeTest in examples

Maniek, Newbie
Posted: 20 October 2011 12:40 PM Total Posts: 4 [ # 2 ]

ok, thanks! AWPCompundShape can contain more shapes now, but how can i make parent container invisible for collisions? Look at attachment.

fragment of code:

private function initObjects():void 
  {
   createGround();
   createSpheres();
  }
  
  private function createGround():void 
  {
   var _groundShapeContainer:AWPCompoundShape = createGroundShape();
   
   var mesh : Mesh;
   var body : AWPRigidBody;
   
   mesh = createMesh();
   _view.scene.addChild(mesh);
   
   body = new AWPRigidBody(_groundShapeContainer, mesh, 0);
   body.position = new Vector3D(0,0,0);

   _physics.addRigidBodyWithGroup(body, 1, 1);
   
   body.position = new Vector3D( -400, 0, 0);
   mesh.position = new Vector3D( -400, 0, 0);
   
   trace("LISTA: ", _groundShapeContainer.children);
  }

  private function createGroundShape():AWPCompoundShape 
  {
   var outsideContainer:AWPBoxShape = new AWPBoxShape(800, 300, 800);
   var insideContainer :AWPBoxShape = new AWPBoxShape(400, 50, 800);

   var mainContainer:AWPCompoundShape = new AWPCompoundShape();
   mainContainer.addChildShape(outsideContainer, new Vector3D(0, 0, 0), new Vector3D(0, 0, 0));
   mainContainer.addChildShape(insideContainer, new Vector3D(300, -500, 0), new Vector3D(0, 0, 0));
   
   return mainContainer;
  }
    
  private function createMesh():Mesh 
  {
   var mesh:Mesh = new Mesh();
   var outsideContainer:WireframeCube = new WireframeCube(800, 300, 800, 0xFFFFFF, 2);
   var insideContainer :WireframeCube = new WireframeCube(400, 50, 800, 0xFF0000, 1);
   
   mesh.addChild(outsideContainer);
   mesh.addChild(insideContainer);
   
   insideContainer.position = new Vector3D(300, -500, 0);
   
   return mesh;
  }
  
  private function createSpheres():void 
  {
   var _sphereMesh:Mesh;
  
   for (var i:int = 0; i < 20; i++) 
   { 
    _sphereMesh = new Sphere(_sphereMaterial, 25);
    _view.scene.addChild(_sphereMesh);
    
    _sphereShape = new AWPSphereShape(25);
    
    var sphereRigid:AWPRigidBody = new AWPRigidBody(_sphereShape, _sphereMesh, 1);
    sphereRigid.position = new Vector3D(0, 400 * i, 0);
    sphereRigid.restitution = 0.1;
    sphereRigid.linearDamping = 0.5;
    
    //_physics.addRigidBody(sphereRigid);
    _physics.addRigidBodyWithGroup(sphereRigid, 1, 1);
    
    sphereRigid.addEventListener(AWPCollisionEvent.COLLISION_ADDED, collisionHandler, false, 0, true);
   }
  }
  
  private function collisionHandler(e:AWPCollisionEvent):void 
  {
   trace(e.collisionObject);
  } 

Strange collision problem :( Software: Away3D 4.x

Maniek, Newbie Posted: 19 October 2011 03:54 PM Total Posts: 4 I have a question: when i add rigidbody(ball) to _view.scene directly, collisions work, everything is ok. But when i add rigidbody to ObjectContainer3D(car) (because i need local coordinates of ball), physics cannot detect collisions. My rigidbody has always the same position, even if i move ObjectContainer! To picture the problem: I’m driving a car in various directions (x axis, z axis) and I want a ball that’s moving 25 pixels to the right of the car to collide (the ball collides but the car doesn’t) Question: I need local coordinates and collisions of my rigidbody. How can i add this rigidbody to other container (or other rigidbody?!) Sorry for shitty english
Yang Li, Administrator Posted: 20 October 2011 01:07 AM Total Posts: 80 [ # 1 ] you can use AWPCompoundShape, look CompoundShapeTest in examples
Maniek, Newbie Posted: 20 October 2011 12:40 PM Total Posts: 4 [ # 2 ] ok, thanks! AWPCompundShape can contain more shapes now, but how can i make parent container invisible for collisions? Look at attachment. fragment of code: private function initObjects():void { createGround(); createSpheres(); } private function createGround():void { var _groundShapeContainer:AWPCompoundShape = createGroundShape(); var mesh : Mesh; var body : AWPRigidBody; mesh = createMesh(); _view.scene.addChild(mesh); body = new AWPRigidBody(_groundShapeContainer, mesh, 0); body.position = new Vector3D(0,0,0); _physics.addRigidBodyWithGroup(body, 1, 1); body.position = new Vector3D( -400, 0, 0); mesh.position = new Vector3D( -400, 0, 0); trace("LISTA: ", _groundShapeContainer.children); } private function createGroundShape():AWPCompoundShape { var outsideContainer:AWPBoxShape = new AWPBoxShape(800, 300, 800); var insideContainer :AWPBoxShape = new AWPBoxShape(400, 50, 800); var mainContainer:AWPCompoundShape = new AWPCompoundShape(); mainContainer.addChildShape(outsideContainer, new Vector3D(0, 0, 0), new Vector3D(0, 0, 0)); mainContainer.addChildShape(insideContainer, new Vector3D(300, -500, 0), new Vector3D(0, 0, 0)); return mainContainer; } private function createMesh():Mesh { var mesh:Mesh = new Mesh(); var outsideContainer:WireframeCube = new WireframeCube(800, 300, 800, 0xFFFFFF, 2); var insideContainer :WireframeCube = new WireframeCube(400, 50, 800, 0xFF0000, 1); mesh.addChild(outsideContainer); mesh.addChild(insideContainer); insideContainer.position = new Vector3D(300, -500, 0); return mesh; } private function createSpheres():void { var _sphereMesh:Mesh; for (var i:int = 0; i < 20; i++) { _sphereMesh = new Sphere(_sphereMaterial, 25); _view.scene.addChild(_sphereMesh); _sphereShape = new AWPSphereShape(25); var sphereRigid:AWPRigidBody = new AWPRigidBody(_sphereShape, _sphereMesh, 1); sphereRigid.position = new Vector3D(0, 400 * i, 0); sphereRigid.restitution = 0.1; sphereRigid.linearDamping = 0.5; //_physics.addRigidBody(sphereRigid); _physics.addRigidBodyWithGroup(sphereRigid, 1, 1); sphereRigid.addEventListener(AWPCollisionEvent.COLLISION_ADDED, collisionHandler, false, 0, true); } } private function collisionHandler(e:AWPCollisionEvent):void { trace(e.collisionObject); }

Strange collision problem :(

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