A GPU persistent grid mapping for terrain rendering

Authors:
Yotam Livny;Neta Sokolovsky;Tal Grinshpoun;Jihad El-Sana
Affiliations:
Ben-Gurion University of the Negev, Department of Computer Science, Beer-Sheva, Israel;Ben-Gurion University of the Negev, Department of Computer Science, Beer-Sheva, Israel;Ben-Gurion University of the Negev, Department of Computer Science, Beer-Sheva, Israel;Ben-Gurion University of the Negev, Department of Computer Science, Beer-Sheva, Israel
Venue:
The Visual Computer: International Journal of Computer Graphics
Year:
2008

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Abstract

In this paper we present persistent grid mapping (PGM), a novel framework for interactive view-dependent terrain rendering. Our algorithm is geared toward high utilization of modern GPUs, and takes advantage of ray tracing and mesh rendering. The algorithm maintains multiple levels of the elevation and color maps to achieve a faithful sampling of the viewed region. The rendered mesh ensures the absence of cracks and degenerate triangles that may cause the appearance of visual artifacts. In addition, an external texture memory support is provided to enable the rendering of terrains that exceed the size of texture memory. Our experimental results show that the PGM algorithm provides high quality images at steady frame rates.