| 摘要 |
A server stores a first multi-resolution texture pyramid and a 3-D geometry object. A client downloads the geometry object and a low resolution texture tile of the first multi-resolution texture pyramid, synthesizes a second multi-resolution texture pyramid from the low resolution tile, and begins rendering images while using the second pyramid as texture. The client downloads additional, higher resolution tiles and replaces synthesized tiles in the second pyramid with the downloaded tiles. The higher resolution tiles are downloaded according to visibility in the images being rendered. Higher visibility tiles are downloaded before lower visibility tiles. The downloading of the tiles from the server is performed in parallel with the rendering of the images. Thus, real texture in the image sequence is progressively increased as synthesized tiles in the local pyramid are selectively replaced with corresponding tiles that have been fetched from the server.
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