Throat Modeling Based on Mass-Spring Method and Unity 3D for Surgery Traning

With continuous development and progress of computer graphics, virtual reality and other technologies, it has gradually begun to use computers to make virtual objects with highly reductive properties to simulate the motion and posture of real objects. The simulation technology of rigid objects is becoming more and more mature. However, the flexible objects‘ modeling and simulation is still an active topic. Using virtual flexible object for preoperative training is an important application of flexible object modeling technology in the field of medical area. Before the surgery, doctors can use virtual flexible objects for teaching or training, which is great significant to improve the success rate of surgery and reduce errors. At present, the demand of soft object models realized by physical modeling method is increasing. In this paper, we construct a virtual spring using Hooke’ s law, updating the velocity and position of the masses using Euler’ s integral method. We also construct a spring mass model for a throat by generating the masses according to the model volume. The mass position information may be acquired from dynamic texture mapping so as to realize the deformation simulation of a flexible object.