Smoothly Rendering of Large-Scale Vector Data on Virtual Globe

Chao Yang; Shui Yan Dai; Ling Da Wu; Rong Huan Yu

doi:10.4028/www.scientific.net/AMM.631-632.516

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 631-632Smoothly Rendering of Large-Scale Vector Data on...

Smoothly Rendering of Large-Scale Vector Data on Virtual Globe

Abstract:

The method of view-dependent smoothly rendering of large-scale vector data based on the vector texture on virtual globe is presented. The vector texture is rasterized from the vector data based on view-dependent quadtree LOD. And the vector texture is projected on the top of the terrain. The smooth transition of multi-level texture is realized by adjusting the transparency of texture dynamically based on view range in two processes to avoid texture “popping”. In “IN” process, the texture’s alpha value increases when the view range goes up while In “OUT” process, the texture’s alpha value decreases. the vector texture buffer updating method is used to accelerate the texture fetching based on the least-recently-used algorithm. In the end, the real-time large-scale vector data rendering is implemented on virtual globe. The result shows that this method can real-time render large-scale vector data smoothly.

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Periodical:

Applied Mechanics and Materials (Volumes 631-632)

Pages:

516-520

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.631-632.516

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Online since:

September 2014

Authors:

Chao Yang*, Shui Yan Dai, Ling Da Wu, Rong Huan Yu

Keywords:

LOD, Vector Data, View-Dependent, Virtual Globe

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* - Corresponding Author

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