*SOLVED* Hinge Constraint

I have been fiddling with ogre bullet for the past couple of weeks. I was able to get the tutorial 2 finished and working. I have extended that project to include some boxes to knock over ect. What I would like to do now is try and figure out how to add a hinge constraint or some other constraint to make a see-saw but I am kinda lost at the moment. I looked into the HingeConstraint(rigidbody1, pivot1, axis1) and the corresponding function that needs 2 rigid bodies. No matter what I input for the pivot or axis I cannot get it to work. I realize I am obviously doing something wrong.


Ogre::Real rX = 0.0, rY=0.0, rZ = 1.0, rW = 0.0;

Ogre::Vector3 position = Ogre::Vector3(-10, 100, -20);
Ogre::Quaternion rotation = Ogre::Quaternion(0.0,0.0,0.0,1.0);

Ogre::Entity *hingeBox1 = mSceneMgr->createEntity("hinge_cube1","cube.mesh");

hingeBox1->setCastShadows(true);

Ogre::AxisAlignedBox boundingB = hingeBox1->getBoundingBox();
size = boundingB.getSize(); size /= 2.0f; // only the half needed
size *= 0.95f; // Bullet margin is a bit bigger so we need a smaller size

hingeBox1->setMaterialName("BoxTextures/wood");


Ogre::SceneNode* hingeBoxNode1 = mSceneMgr->getRootSceneNode()->createChildSceneNode( "hingeBoxNode1", position );
hingeBoxNode1->attachObject(hingeBox1);
hingeBoxNode1->scale(0.1f, 0.25f, 0.02f);


size *= Ogre::Vector3(0.1f, 0.25f, 0.02f);


OgreBulletCollisions::BoxCollisionShape *sceneBoxShape1 = new OgreBulletCollisions::BoxCollisionShape(size);
OgreBulletDynamics::RigidBody *defaultBody1 = new OgreBulletDynamics::RigidBody("hingeRigidBody" + Ogre::StringConverter::toString(1), mWorld);

defaultBody1->setShape( hingeBoxNode1,
sceneBoxShape1,
0.6f, // dynamic body restitution
0.6f, // dynamic body friction
1.0f, // dynamic bodymass
position, // starting position of the box
rotation);// orientation of the box

Ogre::Vector3 pivot1(0.0,100,0.0);
Ogre::Vector3 axis1(0.0,0.0,1.0);
OgreBulletDynamics::HingeConstraint(defaultBody1, pivot1, axis1);


Any help would be greatly appreciated

I was able to get this working with help from the IRC channel, thanks again. Just needed to add the constraint to the world. The only line that changed was the last one

Ogre::Real rX = 0.0, rY=0.0, rZ = 1.0, rW = 0.0;

Ogre::Vector3 position = Ogre::Vector3(-10, 100, -20);
Ogre::Quaternion rotation = Ogre::Quaternion(0.0,0.0,0.0,1.0);

Ogre::Entity *hingeBox1 = mSceneMgr->createEntity("hinge_cube1","cube.mesh");

hingeBox1->setCastShadows(true);

Ogre::AxisAlignedBox boundingB = hingeBox1->getBoundingBox();
size = boundingB.getSize(); size /= 2.0f; // only the half needed
size *= 0.95f; // Bullet margin is a bit bigger so we need a smaller size

hingeBox1->setMaterialName("BoxTextures/wood");


Ogre::SceneNode* hingeBoxNode1 = mSceneMgr->getRootSceneNode()->createChildSceneNode( "hingeBoxNode1", position );
hingeBoxNode1->attachObject(hingeBox1);
hingeBoxNode1->scale(0.1f, 0.25f, 0.02f);


size *= Ogre::Vector3(0.1f, 0.25f, 0.02f);


OgreBulletCollisions::BoxCollisionShape *sceneBoxShape1 = new OgreBulletCollisions::BoxCollisionShape(size);
OgreBulletDynamics::RigidBody *defaultBody1 = new OgreBulletDynamics::RigidBody("hingeRigidBody" + Ogre::StringConverter::toString(1), mWorld);

defaultBody1->setShape( hingeBoxNode1,
sceneBoxShape1,
0.6f, // dynamic body restitution
0.6f, // dynamic body friction
1.0f, // dynamic bodymass
position, // starting position of the box
rotation);// orientation of the box

Ogre::Vector3 pivot1(0.0,100,0.0);
Ogre::Vector3 axis1(0.0,0.0,1.0);
mWorld->addConstraint( new OgreBulletDynamics::HingeConstraint(defaultBody1, pivot1, axis1));