A real-time scene rendering method based on virtual surface light source

Abstract

The invention discloses a real-time scene drawing method based on a virtual surface light source. The method comprises the steps that firstly, a frame is obtained from a video texture to serve as a current luminance distribution state; the SAT of the current video texture is constructed through a GPU; an original surface light source of a scene is divided into a set of virtual surface light sources, and the related information of each virtual surface light source is stored; the radiation factor, the shape factor and the visible factor are respectively calculated according to the information of the virtual surface light sources and the constructed SAT, the calculation results of the three factors are substituted into a drawing equation, the luminance of drawing points of each scene is obtained through accumulation, accordingly, the luminance distribution of the surface light sources of the original texture can be obtained, and the irradiation of the the drawing points of each scene can be drawn; with the changes of the video texture, the steps are repeatedly executed, and therefore the lighting luminance of the drawing points of each scene can be dynamically updated. The sampling rate during the real-time drawing process can be reduced, so that the time for processing the data is shortened, the occupied internal storage is reduced, and meanwhile, the real-time drawing result is not affected.

Description

technical field [0001] The invention relates to a real-time rendering technology in the development of three-dimensional games and virtual environments, in particular to a real-time scene rendering method based on a virtual surface light source that supports dynamic textures. Background technique [0002] Lighting technology is the most important part of realistic rendering technology, and its ultimate goal is to generate light propagation and light-scene interaction effects consistent with the real world through computers. Although this goal is difficult to achieve under existing conditions, researchers have proposed many lighting algorithms to generate approximate results. There are many lighting effects in the real world, from the simplest light and shade changes to complex highlights, soft shadows, light bleeding, caustics, etc., all belong to the category of lighting. Existing lighting algorithms generally only support one or several of these effects, and the generatio...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: by using the surface light source expression and sampling method of virtual surface light source, real-time scene rendering of textured surface light sources with complex brightness distribution is realized, and the sampling rate in the real-time rendering process of scene lighting is reduced, thereby reducing The time and memory occupied by related data processing, while ensuring that the real-time rendering results of scene lighting are not affected

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