// this function calcuates the initial position of the model in relation to the target's local space.
// it assuems that the target's transform is in world coordination.
public Vector3 CalcInitialLocalPosOfModelToTarget(NCARModelInfo modelInfo, global::NCARTargetInfo targetInfo)
{
//this part is inverse of local to global (inverse function of TransformPoint)
Quaternion rotTargetInit = targetInfo.rotTargetInit;
Vector3 scaleTargetInit = targetInfo.scaleTargetInit;
Vector3 posTargetInit = targetInfo.posTargetInit;
Vector3 posModelInit = modelInfo.posInit;
Vector3 t = Quaternion.Inverse(rotTargetInit) * (posModelInit - posTargetInit);
t = Vector3.Scale(new Vector3(1 / scaleTargetInit.x, 1 / scaleTargetInit.y, 1 / scaleTargetInit.z), t);
return(t);
}
//based on the function above, this function moves the model onto the target setting it as the model's parent
public void MoveModelOnTarget(NCARModelInfo modelInfo, global::NCARTargetInfo targetInfo)
{
Transform modelTransfrom = modelInfo.transform;
Vector3 initLocal = CalcInitialLocalPosOfModelToTarget(modelInfo, targetInfo);
modelTransfrom.position = targetInfo.transform.TransformPoint(initLocal);
modelTransfrom.rotation = (modelInfo.rotInit * targetInfo.transform.rotation) * Quaternion.Inverse(targetInfo.rotTargetInit);
modelTransfrom.SetParent(targetInfo.transform);
if (modelInfo.GetComponent <NCARTouchController>() != null)
{
modelInfo.GetComponent <NCARTouchController>().setInitialLocalPosition();
}
modelInfo.currentTarget = targetInfo;
//show model in case it was hidden;
modelInfo.ShowModel();
}
