Abstract: As an important part of virtual surgery system, the soft tissue cutting can largely affect the authenticity of virtual surgery. Aiming at the disadvantage of vertex split algorithm, this paper presents an improved vertex split algorithm based on arc fitting. Firstly, we calculate the size of the incision according to the depth of the incision. Secondly, the shape of the incision is simulated using two arcs. Then, we get the number of discrete points according to the discrete steps. Finally, new grid is blended into the original grid. The simulation results show that the improved vertex split algorithm can produce more authentic effect than original algorithms under the circumstances of real-time simulation.

Key words:  vertex split algorithm, arc, cutting, realistic, real-time