Real-time soft shadow generation method and device for resource-constrained mobile device

Abstract

The invention discloses a real-time soft shadow generation method and device for a resource-limited mobile device. The method comprises the following steps: configuring a three-dimensional scene in the mobile device and various input information required by the three-dimensional scene and creating a shadow map and a depth texture; A first GPU is used to program a pipeline to draw a three-dimensional scene, and the depth information of the encoded three-dimensional model surface closest to the light source is saved into a shadow map. The second GPU programmable drawing pipeline is used for Gaussian blur filtering, and the encoded blur depth information is updated into the shadow map to obtain the blurred shadow map. The third GPU programmable rendering pipeline is used to render the three-dimensional scene, and the soft shadow information contained in the blurred shadow map is rendered to the display window, so as to obtain the soft shadow result in the GPU pixel shader of the third GPUprogrammable rendering pipeline. As that invention is implemented, the lifelike three-dimensional scene soft shadow effect can be drawn on the resource-limited mobile device, and 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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