基于曲面纹理映射的图像对象阴影快速生成方法

在虚拟环境中，对象阴影的轮廓与在光源位置对对象的观察视图相同。通过对图像对象的视图载体进行网格化分割，对每个网格点基于光线跟踪算法计算投影点，基于光源位置计算对象阴影轮廓，从而提出了一种三维地形场景中基于曲面纹理映射的图像对象阴影快速生成方法，并对算法的性能进行了分析。实验表明，在动态光照条件下，该方法在增强对象真实感的同时，能够获得较为理想的场景渲染实时性。

An Efficient Surface Texture Mapping Method of Shadow Generation for Image-based Object

In virtual environment, the object shadow silhouette is same as the perspective view at the position of light. It is proposed a shadow generation method based on surface texture mapping, which divides the object view impostor into grids and calculates the projective point on terrain by ray tracing. The arithmetic performance is analyzed, and scene realistic and real-time rendering with dynamic light are obtained by successive experiments.