基于阴影映射的实时软阴影算法及实现

提出了一种利用阴影映射技术的实时软阴影生成算法。该算法首先生成阴影映射图,然后将阴影区域渲染到定点纹理中,并使用高斯滤波对其进行模糊处理,最后将模糊后的纹理投射回屏幕空间。实验表明,该算法对较复杂物体在保证良好的绘制视觉效果的同时,能达到令人满意的帧速率,从而为大规模复杂场景的实时阴影生成提供了有效的解决途径。

Algorithm and Realization of Real-time Soft Shadows Based on Shadow Mapping

This article present an image space method to generate soft-edged shadows using shadow mapping. First, we generate the shadow map. We render the shadowed regions into a fixed point texture. We can blur this using a Gaussian filter and project it back onto the scene in screen space, Experiments demonstrate that our algorithm can produce visually pleasing effect for the complex objects and achieve satisfying framerate at the same time. So it offers an effective way to generate real-shadow for the complex scenes.