Hello,

I’m trying to test BvhTriangleMeshCarTest with the latest AwayPhysics version on dev branch (1.0), but the car and the cubes fall down through the triangle mesh.

What is happening?

http://bulletphysics.org/mediawiki-1.5.8/index.php/Collision_ShapesCar

skin are a simple mesh… try debug the app. Use:

  debugDraw = new AWPDebugDraw( _view, physicsWorld );
  //debugDraw.debugMode = AWPDebugDraw.DBG_DrawCollisionShapes;
  debugDraw.debugMode = AWPDebugDraw.DBG_NoDebug;

and in the ENTER_FRAME:
debugDraw.debugDrawWorld();

for my software i use this:
for the terrain:
    else if( mesh.name.substr( 0, 2 ) == “t_” )  // TERRAIN
    {
    //
    trace(“Add: ” + mesh.name);
    // mesh.showBounds = true;
    mesh.material = TerrainMat;
   
    var cw:Number = mesh.maxX - mesh.minX;
    var ch:Number = mesh.maxY - mesh.minY;
    var cl:Number = mesh.maxZ - mesh.minZ;
   
    WorldScaleX = 1000 / cw;
    WorldScaleY = 1000 / ch;
    WorldScaleZ = 1000 / cl;
   
   
    // create triangle mesh shape
    var sceneShape:AWPBvhTriangleMeshShape = new AWPBvhTriangleMeshShape( mesh.geometry, true );

   
    //
    var sceneBody:AWPRigidBody = new AWPRigidBody( sceneShape, null, 0 );
    sceneBody.restitution = 0.2;
    sceneBody.position = new Vector3D();
    //
    _physics.addRigidBody( sceneBody );

and this for the car - try this:

  //
  var boxShape1:AWPConvexHullShape = new AWPConvexHullShape( CarBoundMesh.geometry );
  // var boxShape1:AWPBvhTriangleMeshShape = new AWPBvhTriangleMeshShape( CarBoundMesh.geometry );

 
  //
  var BBS:Vector3D = new Vector3D(
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).maxX - CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).minX,
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).maxY - CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).minY,
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).maxZ - CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).minZ );

  //var boxShape1:AWPBoxShape = new AWPBoxShape( BBS.x, BBS.y, BBS.z );
 
  //
  bb1Pos = new Vector3D( bbc[0].x, bbc[0].y, bbc[0].z );
 
  bb1Pos.x = 0;
  bb1Pos.y = 0;
  bb1Pos.z = 0;
 
  //
  var carShape:AWPCompoundShape = new AWPCompoundShape();
  // var cs:AWPCollisionShape = new AWPCollisionShape( boxShape1, );
 
  // Shifting the center of mass
  // If you want to shift the center of mass of a PhysicsNode or PhysicsVehicleNode, you will have
  // to create a CompoundCollisionShape and attach the real CollisionShape for the PhysicsNode to it with an offset.
  // CompoundCollisionShape compoundCollisionShape=new CompoundCollisionShape();
  // BoxCollisionShape boxCollisionShape=new BoxCollisionShape(new Vector3f(0.5f,0.5f,0.5f));
  // compound.addChildShape(boxCollisionShape, new Vector3f(0,1,0));

  // effectively shifts the center of mass with respect to the chassis
  carShape.addChildShape( boxShape1, new Vector3D( 0, bb1Pos.y, 0 ), new Vector3D( 0, 0, 0 ) );

 
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).visible = false;

 
  //
  return carShape;

The collision shape are one mesh created in max around the vehicle. AND check wheel radius and suspension value….

Luca - 07 February 2013 03:20 PM

http://bulletphysics.org/mediawiki-1.5.8/index.php/Collision_ShapesCar

skin are a simple mesh… try debug the app. Use:

  debugDraw = new AWPDebugDraw( _view, physicsWorld );
  //debugDraw.debugMode = AWPDebugDraw.DBG_DrawCollisionShapes;
  debugDraw.debugMode = AWPDebugDraw.DBG_NoDebug;

and in the ENTER_FRAME:
debugDraw.debugDrawWorld();

for my software i use this:
for the terrain:
    else if( mesh.name.substr( 0, 2 ) == “t_” )  // TERRAIN
    {
    //
    trace(“Add: ” + mesh.name);
    // mesh.showBounds = true;
    mesh.material = TerrainMat;
   
    var cw:Number = mesh.maxX - mesh.minX;
    var ch:Number = mesh.maxY - mesh.minY;
    var cl:Number = mesh.maxZ - mesh.minZ;
   
    WorldScaleX = 1000 / cw;
    WorldScaleY = 1000 / ch;
    WorldScaleZ = 1000 / cl;
   
   
    // create triangle mesh shape
    var sceneShape:AWPBvhTriangleMeshShape = new AWPBvhTriangleMeshShape( mesh.geometry, true );

   
    //
    var sceneBody:AWPRigidBody = new AWPRigidBody( sceneShape, null, 0 );
    sceneBody.restitution = 0.2;
    sceneBody.position = new Vector3D();
    //
    _physics.addRigidBody( sceneBody );

and this for the car - try this:

  //
  var boxShape1:AWPConvexHullShape = new AWPConvexHullShape( CarBoundMesh.geometry );
  // var boxShape1:AWPBvhTriangleMeshShape = new AWPBvhTriangleMeshShape( CarBoundMesh.geometry );

 
  //
  var BBS:Vector3D = new Vector3D(
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).maxX - CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).minX,
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).maxY - CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).minY,
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).maxZ - CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).minZ );

  //var boxShape1:AWPBoxShape = new AWPBoxShape( BBS.x, BBS.y, BBS.z );
 
  //
  bb1Pos = new Vector3D( bbc[0].x, bbc[0].y, bbc[0].z );
 
  bb1Pos.x = 0;
  bb1Pos.y = 0;
  bb1Pos.z = 0;
 
  //
  var carShape:AWPCompoundShape = new AWPCompoundShape();
  // var cs:AWPCollisionShape = new AWPCollisionShape( boxShape1, );
 
  // Shifting the center of mass
  // If you want to shift the center of mass of a PhysicsNode or PhysicsVehicleNode, you will have
  // to create a CompoundCollisionShape and attach the real CollisionShape for the PhysicsNode to it with an offset.
  // CompoundCollisionShape compoundCollisionShape=new CompoundCollisionShape();
  // BoxCollisionShape boxCollisionShape=new BoxCollisionShape(new Vector3f(0.5f,0.5f,0.5f));
  // compound.addChildShape(boxCollisionShape, new Vector3f(0,1,0));

  // effectively shifts the center of mass with respect to the chassis
  carShape.addChildShape( boxShape1, new Vector3D( 0, bb1Pos.y, 0 ), new Vector3D( 0, 0, 0 ) );

 

 
  CarContainer.getChildAt( GetChildByName( CarContainer, “CollisionBB1” ) ).visible = false;

 
  //
  return carShape;

The collision shape are one mesh created in max around the vehicle. AND check wheel radius and suspension value….

The link is broken, you can share to us?

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Oops…. Sry

The link is wrong

http://bulletphysics.org/mediawiki-1.5.8/index.php/Collision_Shapes

But i have misunderstood your problem. To solve your problem use this library:

I have some problems to solve… I’m out of service

With 4.1 Alpha i have the same problem. I can see the problem graphically with DBG_DrawCollisionShapes debug option enabled.

Sry again

The problem was I use Away3D 4.0 and now with 4.1 all works fine

With 4.1, really ?

I have no problem with 4.0.9 gold… or whit this set of libs
( not only for physics )

https://github.com/LucaEstiva/GameMaker