本文给出了一个有效的体光源照明模型。与传统基于面辐射的体光源照明模型不同,该模型根据体光源的几何特征来定义其光强分布,且假设只有被嵌入到体光源内部的景物表面才受到它的辐射。可见点处光亮度则直接利用点光源照明模型予以计算,其入射方向考虑了三种不同类型入射方向的组合。实验结果表明,该模型非常简洁,且能模拟出许多传统光照明模型难以模拟的效果。 In this paper, an effective body illumination model is given. Different from the traditional surface illumination-based illumination model, the model defines its intensity distribution according to the geometry of the volumetric light source, and assumes that only the surface of the object embedded in the volumetric light source is exposed to its radiation. The brightness of the visible point is directly calculated using a point light source illumination model, and the direction of incidence takes into account the combination of three different types of incident directions. Experimental results show that the model is very simple and can simulate the effects of many traditional lighting models that are difficult to simulate.