Abstract
This paper introduces a simulation calculation model of ground radiation field. The simulation calculation model includes the calculation of incident radiation field and the calculation of outgoing radiation field. The calculation of incident radiation field is mainly divided into direct solar radiation, diffuse sky radiation and background to target reflected radiation. The parallel computing technology of GPU is introduced, and the process of simulation calculation is implemented based on CUDA framework. The ground radiation field simulation is carried out on several different 3D scenes, and the parallel computing time is compared with the computing time before parallel computing. Through the comparison and analysis, the use of parallel computing can significantly improve the time of simulation calculation. At the same time, with the increase of the number of triangular facets in the 3D scene, the efficiency of acceleration will continue to improve, but the extent of the upgrade will be affected by the conditions of GPU hardware equipment.
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