Real-Time Hair Animation

One can conceive three main aspects in hair simulation-hair shape modeling, hair dynamics or animation, and hair rendering. Often these aspects are interconnected while processing hairs. In the last decade, remarkable progress has been made in hair simulation, especially in hair shape modeling and hair rendering, so that we have had a sea of impressive static hairstyle images. However, hair animation is still the knot blocking the progress of hair simulation. Base on the analysis by synthesis of the works made by other researchers, a hair real- time animation simulation system, is introduced in the paper.Firstly, we research on a question of the hair mechanics. A lattice is defined around the head and the initial hairstyle. A mechanical model is then constructed to provide the lattice with a mechanical behavior related to the hair contained in it. This mechanical model is based on a particle system constructed on the lattice nodes. A particular kind of particle interaction has been developed to represent the mechanical behavior of a hair strand on the lattice. Collisions act directly on the lattice nodes through repulsion forces from a simple metaball representation of the head and shoulders. We deal with the collisions between the hair and the body surface with metaball model.Then , research on a question of Free-Form Deformations. We use Free-Form Deformations to animate the hair . The current positions of the hair strands or any other rendered features are finally computed at rendering time using linear or quadratic B-Spline interpolation from the current position of the lattice nodes.Finally,Open GL is used as a development tool,has good portability .so this Software features with high quality good portability,efficiency. It can archive hairstyles on an ordinary PC. Hair rendering,use the classic hair lighting model Kajiya illumination model for rendering Right hairstyle.