Method and apparatus for obtaining illumination intensity

Abstract

The embodiment of the invention provides a method and apparatus for obtaining an illumination intensity. The method comprises: with a preset virtual light source, a preset number of virtual photons are transmitted to a target triangular patch in a virtual scene in a simulation manner; an illumination intensity at a photon detection point at the target triangular patch is recorded; according to a preset first random point selection rule, a plurality of random points are selected at the target triangular patch; on the basis of the illumination intensity at the photon detection point, a first type of illumination intensity of each random point is calculated; and according to the first types of illumination intensities, illumination intensities of all grid points at the target triangular patch are obtained. Therefore, the illumination intensities of all grid points can be obtained by the first types of illumination intensities of the random points of the target triangular patch, so that the computer resources needed by obtaining the illumination intensity of each triangular patch can be reduced and the speed of obtaining the illumination intensities of all grid points of each triangular patch after rasterization can be increased.

Description

technical field [0001] The invention relates to the field of virtual reality technology, in particular to a method and device for obtaining light intensity. Background technique [0002] Virtual reality (Virtual Reality, referred to as VR) is a computer system that can create and experience a virtual world. It uses computer technology to generate a realistic virtual scene with multiple perceptions such as sight, hearing, and touch. Users can use various interactive devices to interact with the entities in the virtual scene, so that it can produce immersive interactive visual simulation and information exchange. Among them, obtaining the light intensity of each entity in the virtual scene is a necessary link to realize the light rendering of each entity. [0003] Generally, a virtual scene can be understood as being composed of multiple geometric bodies, and each geometric body is composed of multiple triangular faces, wherein a triangular face can be understood as the small...

AI Technical Summary

Problems solved by technology

[0008] According to the above scheme, in the process of simulating the lighting effect in the virtual scene, it is necessary to use the photon mapping algorithm to obtain the light intensity at each grid point on each triangular patch. There are many computing resources, and each triangular patch contains multiple grid points after rasterization. Therefore, when the above scheme is used to obtain the light intensity of each triangular patch, it not only requires more computer resources but also takes a long time.

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