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Shadow drafting method of large-scale outdoor scene

A large-scale, scene-based technology, applied in 3D image processing, image data processing, instruments, etc., can solve problems such as poor shadow quality, achieve the effect of reducing cache space, ensuring drawing speed, and solving technical problems of real-time shadow generation

Inactive Publication Date: 2012-05-02
KARAMAY HONGYOU SOFTWARE
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  • Application Information

AI Technical Summary

Problems solved by technology

The shadow map algorithm is image-dependent, so problems such as edge aliasing are inevitable
Also, the quality of the shadow is related to the resolution of the shadow map, when the resolution is low, the shadow quality is poor

Method used

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  • Shadow drafting method of large-scale outdoor scene
  • Shadow drafting method of large-scale outdoor scene
  • Shadow drafting method of large-scale outdoor scene

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Embodiment Construction

[0041] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042] One of the core ideas of the present invention is to provide a shadow rendering method for large-scale outdoor scenes, including: dividing the viewing volume according to the depth value to obtain the division unit of the viewing volume; dividing the light volume to obtain the light volume The division unit of the quadrangular pyramid of the truncated body; rendering the shadow image to obtain the rendering effect diagram of the shadow image; rendering the entire scene of the large-scale outdoor scene to obtain the rendering effect image of the entire scene of the large-scale outdoor scene; the method is A small memory footprint and fast shadow drawing method for large-scale outdoor scenes.

[0043] The present invention us...

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Abstract

The invention provides a shadow drafting method of a large-scale outdoor scene. The method comprises the following steps that: view frustum division is carried out according to a depth value, so that segmentation units of the view frustum are obtained; optic frustum division is carried out to obtain rectangular pyramid-shaped division units of the optic frustum; rendering is carried out on a shadow graph to obtain a rendering effect graph of the shadow graph; and rendering is carried out on a whole scene of a large-scale outdoor scene so as to obtain a rendering effect graph of the whole scene of the large-scale outdoor scene. According to the invention, a shadow drafting method of a large-scale outdoor scene is provided, wherein the method can be rapidly realized and has a small occupied memory space.

Description

technical field [0001] The invention relates to the field of computer graphics, in particular to a shadow drawing method for large-scale outdoor scenes. Background technique [0002] Shadows are an important part of rendering a scene, and a scene without shadows will look unreal. Shadows can give information about the scene, the spatial relationship between objects and the location of light sources. In recent years, the shadow Figure 1 It has been a popular shadow rendering algorithm. [0003] The shadow map algorithm is a shadow generation algorithm based on image sampling technology. The process of this algorithm is to draw the scene twice: [0004] 1) Draw the scene with the light source as the viewpoint, and store the depth information in a depth texture; [0005] 2) Render the scene in a conventional way, from the real point of view. For each drawing point, calculate its depth value in the clipping space of the light source. For the convenience of description, this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/60
Inventor 平红燕
Owner KARAMAY HONGYOU SOFTWARE
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