Photon mapping parallel method for MIC (intel many integrated core) framework coprocessor

Abstract

The invention discloses a photon mapping parallel method for an MIC (intel many integrated core) framework coprocessor. The photon mapping parallel method comprises the following steps: a photon tracking beginning stage, namely uploading scene data to the MIC framework coprocessor end; a photon light ray intersection phase, namely carrying out intersection computation on one ling ray in each thread each time, and feeding back light ray intersection point information; a photon map generating stage, namely executing different photon impact behaviors according to the light ray intersection point information, storing impacted photons into a photon map until all photon ray beams are tracked and generating an intact photon map; a rendering beginning stage, namely uploading the photon map, organizing a plurality of groups of rendering points, and carrying out hierarchical clustering on each group of rendering points; a nearest photon researching stage, namely uploading clustered rendering points, calculating the nearest photon of each rendering point in a rendering point cluster, and determining emergent radiation intensity of each rendering point; and an image generating stage, clustered calculating the colors of the rendering points, and returning the colors of each group of rendering points to a screen space to form a final image.

Description

technical field The invention relates to the field of realistic rendering and high performance, in particular to a photon mapping parallel method for a MIC architecture coprocessor. Background technique Photorealistic rendering is the core technology and the most time-consuming stage in the field of film and television animation production. The addition of photorealistic rendering technology can increase the authenticity of 3D animation works, but also consumes time and memory. The realization of realistic rendering technology relies on the global illumination algorithm, and many global illumination algorithms have been proposed continuously, such as various algorithms based on Monte Carlo ray tracing, radiosity algorithm, photon mapping algorithm and point-based rendering technology. However, time-consuming global illumination algorithm is a common problem. Combined with high-performance fields, the idea of ​​using SIMD (Single Instruction Multiple Data) parallelization an...

AI Technical Summary

Problems solved by technology

Aiming at the problem of time-consuming calculation of photon mapping algorithm in realistic rendering, the present invention provides a photon mapping parallel method capable of processing global illumination and parallel acceleration and flexibly used for MIC architecture coprocessors

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