Javascript 3D Physics Tut 3 Setup Contact Result Callback

setupContactResultCallback.js

function setupContactResultCallback(){

	cbContactResult = new Ammo.ConcreteContactResultCallback();

	cbContactResult.addSingleResult = function(cp, colObj0Wrap, partId0, index0, colObj1Wrap, partId1, index1){

		let contactPoint = Ammo.wrapPointer( cp, Ammo.btManifoldPoint );

		const distance = contactPoint.getDistance();

		if( distance > 0 ) return;

		let colWrapper0 = Ammo.wrapPointer( colObj0Wrap, Ammo.btCollisionObjectWrapper );
		let rb0 = Ammo.castObject( colWrapper0.getCollisionObject(), Ammo.btRigidBody );

		let colWrapper1 = Ammo.wrapPointer( colObj1Wrap, Ammo.btCollisionObjectWrapper );
		let rb1 = Ammo.castObject( colWrapper1.getCollisionObject(), Ammo.btRigidBody );

		let threeObject0 = rb0.threeObject;
		let threeObject1 = rb1.threeObject;

		let tag, localPos, worldPos

		if( threeObject0.userData.tag != "ball" ){

			tag = threeObject0.userData.tag;
			localPos = contactPoint.get_m_localPointA();
			worldPos = contactPoint.get_m_positionWorldOnA();

		}
		else{

			tag = threeObject1.userData.tag;
			localPos = contactPoint.get_m_localPointB();
			worldPos = contactPoint.get_m_positionWorldOnB();

		}

		let localPosDisplay = {x: localPos.x(), y: localPos.y(), z: localPos.z()};
		let worldPosDisplay = {x: worldPos.x(), y: worldPos.y(), z: worldPos.z()};

		console.log( { tag, localPosDisplay, worldPosDisplay } );

	}

}