Large-breadth scene hyperfine simulation and geography continuous display technique

A display technology, a large-format technology, applied in image data processing, 3D modeling, instruments, etc., can solve the problems of reducing simulation area, loss of fineness, lack of technical means, etc., to reduce costs, facilitate promotion and popularization Effect

Inactive Publication Date: 2013-12-18
卢伟 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, computer simulation has been widely used, but there is a contradiction between large format and fineness in terrain simulation. In the case of limited computer memory capacity and computing speed, increasing the simulated terrain area will inevitably lose fineness, and improving the simulation fineness must Reduced simulation area
Some application environments need to display a large area of ​​terrain while maintaining high simulation precision of the viewpoint. The method adopted at this time is usually to use a dedicated graphics workstation, and there is still no effective technical means on the PC

Method used

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  • Large-breadth scene hyperfine simulation and geography continuous display technique
  • Large-breadth scene hyperfine simulation and geography continuous display technique
  • Large-breadth scene hyperfine simulation and geography continuous display technique

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Embodiment Construction

[0012] The terrain simulation in this technology includes four parts: terrain elevation, surface texture, surface model, and close-range high-definition simulation display.

[0013] a. Terrain elevation simulation

[0014] Terrain elevation adopts the general .dem format, which can be directly SRTM data, and can also be converted from other formats to .dem format. However, in order to facilitate LOD processing in the computer, the side length of the terrain elevation data used must be 2 to the Nth power of points, as shown in Figure 1. During computer processing, cubic spline smoothing is performed on the gaps between points to obtain a complete and smooth terrain space.

[0015] b. Surface texture segmentation

[0016] The surface texture is pasted on the terrain elevation and is mainly used to display the background color of the terrain in the foreground. The surface texture adopts .png format, and its side length points are required to be integer multiples of the terrain...

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Abstract

Provided is a large-breadth scene hyperfine simulation and geography continuous display technique. The technical scheme is that the technique comprises the steps of using the LOD standards to finish dividing the geography into a plurality of blocks and meanwhile segmenting earth surface texture maps correspondingly, calling a simple model in LOD to achieve the purpose of saving computer resources when some blocks are far away from a current visual point, manufacturing various ground, sand, stone, grass and small vegetation models, writing earth surface model configuration files corresponding to all geography blocks, dynamically loading the earth surface models when the geography block is close to the current visual point, and releasing the models to achieve the purpose of saving the computer resources when the geography block is far away from the current visual point.

Description

Technical field: [0001] The invention relates to computer three-dimensional terrain simulation display technology, in particular to large-format scene simulation. Background technique: [0002] At present, computer simulation has been widely used, but there is a contradiction between large format and fineness in terrain simulation. In the case of limited computer memory capacity and computing speed, increasing the simulated terrain area will inevitably lose fineness, and improving the simulation fineness must Reduce the simulation area. Some application environments need to display a large area of ​​terrain while maintaining a high simulation precision of the viewpoint. At this time, the method adopted is usually to use a dedicated graphics workstation, and there is still no effective technical means on the PC. Invention content: [0003] In order to solve the contradiction between terrain simulation format and fineness, and realize ultra-fine continuous simulation of lar...

Claims

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Application Information

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IPC IPC(8): G06T17/05
Inventor 卢伟
Owner 卢伟
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