positioning/orientation of carbody...

me_go_fast

14-05-2006 00:10:43

Hello, when I try to create a vehicle with a shape different than a cube, I cannot get gravity to affect it. I originally thought it could be from a big gap between the tires and body, but then when I tried to move the body and tires closer nothing changed? If anyone has any idea what may be the problem, please let me know. Below is the code I use to create the carbody.

Ogre::Real mass = 900;

	Ogre::Vector3 inertia = OgreNewt::MomentOfInertia::CalcBoxSolid( mass, size );

	Ogre::Entity* carMesh = sceneMgr->createEntity("Car"+Ogre::StringConverter::toString(mEntityCount++),"Car02.mesh");

	carMesh->setCastShadows(false);

	Ogre::SceneNode* carNode = sceneMgr->getRootSceneNode()->createChildSceneNode(pos, orient);

	carNode->attachObject(carMesh);

	carNode->setScale(0.0005,0.0005,0.0005);

	// Creates and places the camera via a child node off of the car node

	Ogre::SceneNode* camNode = carNode->createChildSceneNode(Ogre::Vector3(carNode->getPosition().x - 2000, carNode->getPosition().y + 2000, carNode->getPosition().z),Ogre::Quaternion(Ogre::Quaternion(sqrt(0.5),0,-sqrt(0.5),0)));

	camNode->attachObject(mCamera);

	OgreNewt::Collision* col = new OgreNewt::CollisionPrimitives::TreeCollision(mWorld, carNode, false);

	OgreNewt::Body* bod = new OgreNewt::Body(mWorld, col);

	delete col;

	bod->attachToNode(carNode);

	bod->setMassMatrix( mass, inertia );

	bod->setStandardForceCallback();

	bod->setPositionOrientation(pos,orient);

	return bod;

Thanks

walaber

15-05-2006 17:58:40

you cannot use TreeCollision for dyamic (moving) objects. you need to use ConvexHull for those!

me_go_fast

15-05-2006 22:44:10

Good point! Thanks! :oops:

I feel stupid for overlooking something so simple!