METHOD OF RENDERING COMPLEX POLYGONAL SCENES WITH APPLICATION OF FUNCTIONALLY SPECIFIED OBJECTS
DOI:
https://doi.org/10.32782/KNTU2618-0340/2020.3.2-2.5Keywords:
rendering; polygons; levels of detail; functionally defined objects; GPUsAbstract
Recently, the capabilities of hardware visualization have increased significantly. However, handling complex scenes is still one of the most fundamental problems in computer graphics. At the same time, it is important to generate complex graphic objects with acceptable performance sufficient for dynamic and interactive modes. A method for rendering complex scenes is presented. The main idea of the method is to generate a scene image by reconstructing it from a dynamically selected set of random surface sampling points. The image of a complex three-dimensional scene consisting of primitives - triangles is visualized using reconstruction from a dynamically selected array of surface points. Anchor points represent the complex geometry of the scene, so not every triangle needs to be processed separately during rendering. At the first stage, random sampling points are selected so that they cover projections of objects in the image plane approximately uniformly. In the second step, the method reconstructs the visibility between the selected anchor points. The method is independent of grid connectivity and topology. As a result, the rendering time grows only logarithmically from the number of triangles in the scene. Automatically detecting scenes with low detail provides high-speed rendering. Precomputed data structures enable interactive dynamic scene updating. To describe the surfaces, the deviation functions (second order) from the base quadric are used. To form models of complex objects based on perturbation functions, set-theoretic union and intersection operations using Boolean functions are used. Memory requirements grow linearly with the number of triangles. The installation diagram based on the scene graph creates the conditions for a further reduction in memory. Functional objects were added to increase the complexity of scenes. The proposed method can be effectively used in highly realistic computer graphics systems.
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