Real-time dynamic generating method for features on bird body model

Abstract

The invention discloses a real-time dynamic generating method for features on a bird body model. The method comprises the specific steps that UV mapping is carried out on a polygon model of a bird body, a vertex local coordinate system is set up on each vertex, and direction vectors of feather rods in the features located in the vertex local coordinate systems are set; a particle system is generated, all particles are restrained on the faces of a polygon, repulsive force among the particles serves as the width of the features, after evolution is carried out to the static state, the positions of all the particles are the positions of folliculus pili, and the types of the features are determined randomly; after the bird model is animated and deformed, the vertex local coordinate systems are updated, the direction of the feature rods of the features at the moment of current frames is calculated, the positions of the folliculus pili serve as coordinate origins to set up a feature local coordinate system, feature reference NURBS surface patches are set up according to the set width and the set length, the features are generated on the NUBRS surface patches, and the steps are repeated for all the frames in animation. The method can achieve no-penetration covering among the features, and generate the dynamic features in real time.

Description

technical field [0001] The invention belongs to the field of three-dimensional animation, in particular to a method for automatic non-interspersed coverage and real-time dynamic generation of feathers on a bird torso model in three-dimensional animation. Background technique [0002] Three-dimensional animation technology is a new technology that has emerged with the development of computer software and hardware technology in recent years. It can conveniently and quickly produce three-dimensional animation or film and television special effects shots that meet the needs of directors. [0003] The production principle of 3D animation is generally as follows: First, use 3D animation production tools (such as 3ds Max, Maya or Houdini) to build a virtual world in the computer; then, add scenes and 3D cartoon characters to the virtual 3D world. 3D model; finally, set the animation curve of the model, the trajectory of the virtual camera and other animation parameters, and render ...

AI Technical Summary

Problems solved by technology

The main reason is that although the distribution of feathers on the bird's trunk seems random, it is not completely random, because there is a minimum distance between different hair follicles to avoid the interpenetration of feathers. In addition, the direction of the feather shaft should be close to the surface of the trunk, while The torso of the bird itself will be deformed due to animation, so in the existing technology, there is no complete technical solution for solving the problem of dynamic feather generation on the torso model of the bird

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