A real-time soft shadow generation method and device for resource-constrained mobile devices

Abstract

The invention discloses a method and device for generating real-time soft shadows for resource-limited mobile devices, including configuring a three-dimensional scene and various input information required by the mobile device and creating a shadow map and depth texture; using a first GPU The programmable rendering pipeline draws the 3D scene, and saves the encoded depth information of the surface of the 3D model closest to the light source in the shadow map; the second GPU programmable rendering pipeline is used to perform Gaussian blur filtering on it, and the encoded blurred depth The information is updated to the shadow map to obtain the blurred shadow map; the third GPU programmable drawing pipeline is used to draw the three-dimensional scene, and the soft shadow information contained in the blurred shadow map is drawn to the display window to obtain the third requested Soft shadow results in the GPU pixel shader of the GPU programmable drawing pipeline. By implementing the invention, not only can the realistic three-dimensional scene soft shadow effect be drawn on the resource-limited mobile device, but also the real-time generation efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional graphics rendering, and in particular relates to a real-time soft shadow generation method and device for a three-dimensional scene, which are used to solve the soft shadow generation quality problem of the existing soft shadow generation method on resource-limited mobile devices. Background technique [0002] Shadow is a very important content in the field of computer graphics, especially in 3D graphics rendering technology. Realistic shadow effects can make the 3D scene more realistic and help people intuitively understand the relative positional relationship of objects in the 3D scene. Therefore, shadow generation technology has extensive and important applications in the fields of virtual reality, 3D animation and video games. [0003] In the real world, light is blocked by objects to create shadows. In the field of 3D graphics rendering, it is necessary to simulate the optical pri...

AI Technical Summary

Problems solved by technology

However, due to the low ability of resource-constrained mobile devices to GPU programmability and limited support for video memory data formats, the GPUs of many mobile phones and tablet computers can only support OpenGLES2.0 version, a real-time soft shadow generation method for personal computers doesn't support these resource-constrained mobile devices well

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