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Research about visualization of hybrid multi-resolution terrain and vector data

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Abstract

The hybrid geometry information system which can process vector and terrain data at the same time has become a hot. And one of the key problems is how to render complex vector data over multi-resolution terrain. A key data structure and associated algorithm for the combined display of multi-resolution 3D terrain and 2D curve feature were proposed. Then a performance analysis was made and a conclusion is given.

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... [2] One by one to judge whether the block to meet the resolution of top-level requirements, if met, will insert it into the draw list, or a branch of its four subblocks A, inserted into the test list. [3] Judge whether the list is empty, if empty, the algorithm ended, or else turn to Step 4. [4] One by one to judge whether the list one by one in the sub-block is overlapped with the visible region, if the overlap will insert it into the test list B, otherwise discard them. ...
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