A 3D animation production method based on openscenegraph

Abstract

The invention discloses a three-dimensional animation production method based on OpenSceneGraph, which simulates the non-subject target animation in the scene by controlling the regular geometric motion of the two-dimensional picture along the horizontal direction and the vertical direction in the three-dimensional scene, specifically including the original picture preprocessing steps, Steps of creating a subgraph, adding a billboard, updating scene data, and drawing a scene; the present invention preprocesses the picture to remove the background, and obtains a target picture with a transparent channel; changes the corresponding relationship between texture coordinates and vertices in each frame , to achieve texture animation effects; use billboard technology to automatically change the direction of the picture when the viewing angle changes, and always face the screen to improve visual authenticity; use the update scene data step to update each frame of animation data; use the drawing step to obtain the scene data to draw each frame of the scene; the method provided by the invention reduces the work of modeling and designing the movement of fine models, and reduces the difficulty and cost of making 3D animation.

Description

technical field [0001] The invention belongs to the technical field of scene graph simulation, and more specifically relates to a three-dimensional animation production method based on OpenSceneGraph. Background technique [0002] OpenSceneGraph (OSG) is an open-source high-performance 3D image rendering engine released free of charge based on the modified LGPL protocol (OSGPL). It is widely used in visual simulation, games, virtual reality, scientific visualization and modeling and other fields. It has become an industry standard OpenGL is the underlying platform, written in portable ANSI C++; it solves the problem of high development costs and unfavorable product promotion using commercial engines such as OpenGVS and Vega, which is more meaningful from a practical point of view, and the effect is not inferior For commercial visual rendering software. [0003] Virtual scene technology is an important branch of virtual simulation scene technology, and its components mainly ...

AI Technical Summary

Problems solved by technology

In some scenes, a part of the animation plays an important role in making the scene more realistic and beautiful, but this part of the animation effect is mainly for visual needs, and does not require precision; in this case, using skeletal animation will consumes a lot of resources

[0004] Taking the motion animation of seabed fish as an example, swimming fish and fluctuating seaweed are essential scene members. If skeletal animation is used to realize it, it is necessary to make a large number of 3D models and calculate the swimming of fish bodies. And a large number of fish swimming is not a simple translation, it also has the twisting of the fish body; but most of them are not the main target in the scene, but modify the whole scene to make it more realistic; in order to achieve The real animation effect uses skeletal animation, which has a huge computational workload and will consume a lot of resources

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