Super-large-scale weather effect rendering method

A super-large-scale, weather-based technology, applied in image data processing, 3D image processing, instruments, etc., can solve problems that have not yet been solved, and achieve the effect of improving rendering efficiency and powerful dynamic self-adaptive ability

Inactive Publication Date: 2013-01-02
PLA UNIV OF SCI & TECH
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Problems solved by technology

But the quadtree cannot be directly used to solve the problem of dividing the spherical space
Until now, there

Method used

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  • Super-large-scale weather effect rendering method
  • Super-large-scale weather effect rendering method
  • Super-large-scale weather effect rendering method

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Embodiment Construction

[0025] The ultra-large-scale weather effect rendering method of the present invention renders weather effects based on a spherical quadtree particle system, and establishes a spherical quadtree to divide the earth's surface with the idea of ​​a quadtree, and each node represents a region. Add particle emitters to the leaf nodes of the spherical quadtree to form a particle source, and combine different particle sources to form a quadtree particle system. The quadtree particle system can realize the simulation of weather effects for regions of any size and shape on a global scale. The steps are as follows:

[0026] The first step is to establish a spherical quadtree, with longitude θ, latitude The value range of is divided into two divisions to realize the four-fork division of the sphere.

[0027] Such as Figure 4 As shown, point O represents the center of the earth, point P represents any point on the surface of the earth, and the distance from OP is equal to the radius R ...

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Abstract

The invention discloses a super-large-scale weather effect rendering method. The super-large-scale weather effect rendering method includes implementing quadtree blocking of a sphere by dichotomy division of value interval of longitude and latitude; adding a particle emitter to form particle sources, and combining the particle sources to form a quadtree particle system; performing are editing, selecting spherical quadtree node blocks inside a targeted area or is intersectant to the targeted area, and adding the spherical quadtree node blocks to a node block queue to implement approximation to the targeted area; and using intersection judgment of bounding boxes of the particle sources and truncated cones to remove the particle sources. Rendering efficiency of weather effect is increased greatly. The super-large-scale weather effect rendering method has high dynamic self-adaptation capability and is adaptable to various changes in program operation process.

Description

technical field [0001] The invention belongs to a super-large-scale weather effect accelerated rendering technology, in particular to a super-large-scale weather effect rendering method. Background technique [0002] Real-time rendering of weather effects has always been one of the most challenging topics in the field of computer graphics, and has a wide range of application values ​​in geographic information systems, games, film and television and other industrial fields. [0003] Using computers to render weather effects requires solving two problems of effect and efficiency. The effect problem focuses on the visual fidelity of weather effect rendering, that is, the similarity between the weather effect presented on the screen and the weather effect in real life, and solves the static problem. Efficiency issues focus on the real-time nature of weather effect rendering. It is required that each frame of the rendered image is dynamically changed, and the change is similar ...

Claims

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Application Information

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IPC IPC(8): G06T15/00
Inventor 罗健欣唐斌倪桂强胡谷雨金凤林谢钧端义锋缪志敏陈剑
Owner PLA UNIV OF SCI & TECH
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