Research On Dynamic Simulation Of 3D Virtual Human Hair

With the rapid development of virtual reality technology and the performance of computer hardware, the technology of virtual reality has been used more and more widely in many areas. Hair, as a medium of transmission characteristics and feeling, plays an important role in the sense of reality of virtual human. Due to the huge amount and complex geometric properties of hair, it is very difficult for real-time simulation with traditional algorithm. Therefore, it has a positive and practical significance to study virtual human hair simulation technology.The main contents of this thesis include hair modeling, hair rendering, collision detection and response. Firstly, based on the reconstruction of 3D head model, a redrawing pickup method is used to specify hair growth region in the scalp layer. The mass spring model is set up to express hair strand. We have used an new algorithm based on DFTL(Dynamic Follow The Leader) to calculated the deformation and a method based on FTL (Static Follow The Leader) is given to generate other hair strand. Secondly, in order to Simulated realistic lighting environment, Marschner lighting model is used in this thesis. It created hair self-shadow by Shadow Map and Deep Opacity Maps. Simultaneously, translucent technology and antialiasing technology has been adopted to enhance the realistic of hair rendering. Lastly, K-Dops hierarchical bounding box is constructed in human body to solve the problem of hair-body collisions. We have applied fluid dynamics in the hair simulation, the FLIP (Fluid Implicit Particle) method is used to maintain the hair volume and to handle the hair-hair collisions.According to the above research, the thesis develops a 3D virtual human hair dynamic simulation system with key-mouse interaction function. It can simulate relatively realistic virtual human hair by adjusting the parameters of the system. The results show that, the method proposed in this thesis can achieve high quality hair rendering and dynamic simulation under the common hardware configuration.