Physics Simulation Forum

// Create shape in my Physics Manager class
// ...
btCollisionShape aBall = new btSphereShape(1.5f);
createBall("ball", Ogre::Vector3(1.5f, 1.5f, 1.5f), Ogre::Vector3(0,1.5f, -1*(arena_measures.z/2)+10), 200.0, aBall);
// ...

void CriterionBowling::createBall(const char *name, const Ogre::Vector3 &size, const Ogre::Vector3 &pos, float mass, btCollisionShape &shape)
{
   // Create ogre scene node
   Ogre::SceneNode* node1 = mSceneMgr->getRootSceneNode()->createChildSceneNode(name);
     
   // Create our rigidboy using our Bullet Wrapper
    btRigidBody &body = mPhysics.createBody(btTransform(btQuaternion::getIdentity(), btVector3(pos.x, pos.y, pos.z)), mass, shape);
   // Set some physical properties
   //...
   
   // Add it to our bowling simulation
   mBall = new Ball(*node1,body);
   
    // Get its mesh
    Ogre::Entity *entity = mSceneMgr->createEntity(name, "sphere.mesh");
    // Give it a texture
    entity->setMaterialName("BowlingBall");
    node1->attachObject(entity);   
}

void Ball::throw(const Vector3 force)
{   
   // Lock the ball --> player can't control it anymore
   locked = true;

   this->mRigidBody.activate(true);

   // Apply force to the rigidbody
   this->mRigidBody.applyCentralImpulse(btVector3(force.x,force.y,force.z));   

}
void Ball::update()
{
      // Get Bullet transformation matrix
      btTransform transform;
 
      // Get the transformation of this rigidbody in the transformation matrix
      mRigidBody.getMotionState()->getWorldTransform(transform);
 
      // Obtain the rotation and update the graphical representation
      btQuaternion rotation(transform.getRotation());
      node.setOrientation(rotation.getW(), rotation.getX(), rotation.getY(), rotation.getZ());
      
      // Update the position
      const btVector3 &origin = transform.getOrigin();         
      node.setPosition(origin.getX(), origin.getY(), origin.getZ());      


}