Automatic generation method for point set model animation driven by mass point-spring system

Abstract

The invention discloses an automatic generation method for a point set model animation driven by a mass point-spring system. The method includes the steps that firstly, point set model data are read, the point set model data are zoomed to the designated size, and an axial coordinate bounding box of a zoomed model is calculated; the mass point-spring system is set up by partitioning the bounding box, and the incidence relation of a spring grid and all points in the point set model is determined; the stress condition of the mass point-spring system is analyzed according to the set initial conditions and the basic movement law, and updating of the positions of the points in a point set is driven by the spring system. In the point set changing process, a point set curved surface is constructed by the point set model at the current moment, gridding processing is conducted on the point set curved surface, and a current frame of the animation is generated by drawing a grid model; a follow-up frame of the animation is determined by the spring system state determined by a kinetic equation at the next moment. According to the automatic generation method, the motion animation of the point set model can be automatically generated simply by setting the initial state of the system.

Description

technical field [0001] The invention discloses a method for automatically generating point set model animation driven by a "mass point-spring" system. The method belongs to the technical field of computer animation, and in particular relates to a technical method for automatically generating point set animation. Background technique [0002] In the field of computer animation, there are mainly three methods for generating animation: frame-by-frame method, key frame method and skeletal animation. A frame refers to a single image frame in the smallest unit of animation, which is equivalent to each frame on a movie film, and a frame is represented as a frame on the time axis of an animation software. [0003] The frame-by-frame method is to edit and draw the contents of each frame one by one, and then play them in chronological order to form an animation. This type of method is mainly used in the production of traditional animation. Its advantages are: good simulation, high d...

AI Technical Summary

Problems solved by technology

Its advantages are: good simulation, high degree of freedom, and can simulate various screen changes; the disadvantage is: the animation design work is very cumbersome and labor-intensive

Compared with the frame-by-frame method, this type of method significantly reduces the workload of animation designers and reduces the cost of animation production; its disadvantage is that when dealing with more complex motion processes, it is still necessary to draw a large number of key frames to Ensure the realistic effect of the animation screen; if some key frames are not set properly, motion distortion will also occur in the animation

Compared with key frame animation, this method only needs to store the data of bones (the number of bones is relatively small) for each frame when generating animation, so it takes up less space, and multiple skins can share the same bones to generate different animations; The disadvantages are: the skeleton animation rendering process takes a lot of time, and the motion relationship between bone marrow and skin is not easy to grasp

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