Boolean Operations Algorithm on Triangle Meshes for Modeling Bone Scaffold

Abstract

Boolean operation is the key technology for modeling the bone scaffold. This paper proposes a Boolean operation algorithm based on triangle mesh model. It firstly voxelizes the mesh models based on project vector and octree, and classifies the vertices into inside, outside and surface type according to the position relationship between the vertex and the other mesh model’s voxel. Then the triangles can be easily classified based on the vertices class. Finally the Boolean model can be composed by the corresponding triangles of the Boolean operation. In order to obtain the intersection features well, it detects the intersection lines and gets the intersection polygons further, and then triangulates the polygon using the ear clipping method. This Boolean operation algorithm has been applied to the bone scaffold modeling and got good performance．