Bullet Physic: Transform body after adding
- by Mathias Hölzl
I would like to transform a rigidbody after adding it to the btDiscreteDynamicsWorld.
When I use the CF_KINEMATIC_OBJECT flag I am able to transform it but it's static (no collision response/gravity). When I don't use the CF_KINEMATIC_OBJECT flag the transform doesn't gets applied. So how to I transform non-static objects in bullet?
DemoCode:
btBoxShape* colShape = new btBoxShape(btVector3(SCALING*1,SCALING*1,SCALING*1));
/// Create Dynamic Objects
btTransform startTransform;
startTransform.setIdentity();
btScalar mass(1.f);
//rigidbody is dynamic if and only if mass is non zero, otherwise static
bool isDynamic = (mass != 0.f);
btVector3 localInertia(0,0,0);
if (isDynamic)
colShape->calculateLocalInertia(mass,localInertia);
btDefaultMotionState* myMotionState = new btDefaultMotionState();
btRigidBody::btRigidBodyConstructionInfo rbInfo(mass,myMotionState,colShape,localInertia);
btRigidBody* body = new btRigidBody(rbInfo);
body->setCollisionFlags(body->getCollisionFlags()|btCollisionObject::CF_KINEMATIC_OBJECT);
body->setActivationState(DISABLE_DEACTIVATION);
m_dynamicsWorld->addRigidBody(body);
startTransform.setOrigin(SCALING*btVector3( btScalar(0), btScalar(20), btScalar(0) ));
body->getMotionState()->setWorldTransform(startTransform);
