Efficient collision detection based on component technique using OBB trees in virtual assembly

An efficient collision detection scheme based on component technology using oriented bounding box trees is presented. Firstly, model is divided into parts and then a component hierarchical tree is built in a bottom-up manner using the OBB of these parts. In order to construct component OBB of two parts quickly, a simple way to compute two OBBs´ convex hull is also proposed. As a result, not only parts´ constraints are satisfied but also the issues of low speed in building and refitting the hierarchical bounding volume trees are solved.