Abstract
Level of detail (LoD) method is a key technique for real-time rendering. The generation algorithms of LoD models may be divided into two categories: static or view-independent algorithms and dynamic or view-dependent algorithms, each has its own advantages and drawbacks. This paper presents a new realtime rendering algorithm incorporating both of the two kinds. We simplify polygonal models viewindependently according to a user-specified approximation error first. Then the simplified models are used in a view-dependent real-time rendering algorithm. The paper presents a new view-dependent realtime mesh simplification algorithm. The algorithm can produce simplified models in real time while controlling the rendering pixel error. Examples illustrate efficiency of the algorithm.
Highlights
Many computer graphics applications such as virtual reality, scientific visualization and computer aided design, require complex, highly detailed models to maintain a convincing level of realism
Real-time simplification algorithm simplifies the model in real time according to the viewpoint, the line of sight and the resolution of the screen window
Compared with the existing view-independent mesh simplification algorithms, the algorithm presented in this paper has its own features, it is based on floating-cell vertex clustering and simplifies the model in real time according to the viewpoint, the line of sight and the resolution of screen window
Summary
Many computer graphics applications such as virtual reality, scientific visualization and computer aided design, require complex, highly detailed models to maintain a convincing level of realism. LoD algorithms select appropriate level of detail model (containing different number of polygons) to render according to the distance between the viewpoint and the model in a scene [2]. View-dependent simplification algorithms generate simplified models dynamically according to the viewpoint. View-dependent simplification algorithms create simplified models dynamically according to the viewpoint. It can guarantee smooth transition between different LoD, but existing algorithms have to construct a simplification structure for the whole scene and the structure contains a great amount of positive and retrorse information about the simplification operation. The simplified models are used in a view-dependent real-time rendering algorithm. The algorithm is based on floating-cell vertex clustering, takes the viewpoint, the line of sight and the resolution of screen window into account It is enhanced with viewing frustum culling and back-face culling.
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