A method for manipulating volumetric fog in screen space

Abstract

The invention discloses an algorithm for volumetric fog in screen space, which includes: using MRT technology to render objects in all scenes, and rendering the depth information of the scene to a texture; based on the texture of the rendered scene information, rendering the volumetric fog respectively For the back and front of the model, the front and back depths of the volumetric fog are obtained and stored in two rendering targets, and the blending factor of visible pixels is calculated based on the depth value of the scene; based on the calculated blending factor of visible pixels, the scene color and Fog colors are blended by a blend factor and projected to the screen space final color. The algorithm of the volumetric fog in the screen space of the present invention can overcome the defects of poor simulation effect and few applicable scenes in the prior art, so as to realize the advantages of good simulation effect and many applicable scenes.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to an algorithm for volumetric fog in screen space. Background technique [0002] There are many natural phenomena, such as clouds and fog, which can bring people the feeling of being in a fairyland. In the virtual 3D scene, the game uses a lot of atomization to simulate an atmospheric phenomenon in reality to create an atmosphere. An atmosphere to enhance the authenticity and sense of distance of the scene. The fog contains thousands of small particles, which not only absorb the light from the scene, but also reflect a part of the light to the scene. There are reflection, scattering, Problems such as absorption cannot be represented by a simple model. In the game, you can try to turn off or turn on the fog effect. After the fog effect is turned on, the scene looks more realistic, and the game is smoother. In fact, the object after the fog model is optimized to improve th...

AI Technical Summary

Problems solved by technology

[0003] Currently in the game, the depth of the scene (that is, the distance from the scene to the camera) is used to calculate the fog coefficient. This method can quickly generate the effect of fog, and the complexity is relatively low. The entire fog is full of the scene. , unable to reflect the real fog effect

[0004] In the process of realizing the present invention, the inventor found that there are at least defects such as poor simulation effect and few applicable scenarios in the prior art

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