Adaptive Triangular Facet Model for 3-Axis NC Milling Simulation

The resolution of triangles to approximate machining surface is automatically updated according to its flatness,thus greatly reducing the number of triangles at planar regions,while ensuring rea-l time and high quality of visual presentation,and keeping translation,rotation and zooming operations still applicable. When machining precision is evaluated,or overcut,undercut and interference are inspected,full resolution model is automatically restored to ensure the accuracy and correctness of these inspections.