Yuanyuan Xu
Global lighting algorithms; house residential design; body pixels; ray tracing
Aiming at the defects of the traditional global illumination algorithm, such as high complexity, low efficiency, poor application effect in housing design, a global illumination algorithm model based on voxels and calculation methods under various lighting conditions has been proposed. In this study, a rasterisation method is designed to solve the defect that the current global illumination algorithm can only achieve the approximate global illumination effect on static objects. Also, a conical ray tracing calculation method is proposed to solve the ambient occlusion to improve the efficiency of lighting calculation. Finally, for the solution of indirect illumination, the integral hemisphere in the drawing equation is divided into several approximate conical regions, and the cumulative light radiation is weighted. The results show that the rendering time of the volume pixel-based global illumination algorithm model is 425.8 s, which is 67.4 s, 102.6 s, 182.9 s less than VXGI, LPV, and PM, respectively. And the MSE value of the volume pixel-based global illumination algorithm model is 0.0034, which are 0.0017, 0.0051, 0.0071 lower, respectively, than the other three algorithms. So, the global lighting algorithm based on body pixels is excellent in complex interior environments of houses, providing a more comprehensive and realistic performance for the interior design of houses.
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