摘要
采用基于视截体分层的方法进行大规模场景阴影绘制时,需要考虑分层的合理性与阴影的图像质量。因此,提出了一种改进的视截体对数分层方法,根据各分割层与视点的距离,为每一个分割层确定一个PCF过滤核的尺寸,根据过滤核尺寸的大小,调整该层的位置,并使用PCF过滤方法提高阴影的图像质量。实验结果表明,该方法具有更好的阴影图像效果。
It is necessary to consider the reasonableness of split and the quality of shadow image when drawing shadow based on the view frustum split in a large scale scenes. Therefore, this paper presented a modified method of logarithmic split scheme. It gets the dimension of the PCF kernel for every split part in according to the distance between every split part and view point. Also, it adjusts the position of the level base on the size of the kernel. It improves the quality of shadow by using PCF method. The results show that the method put forward by this paper has better effect on the shadow image.
出处
《沈阳航空工业学院学报》
2009年第2期25-28,8,共5页
Journal of Shenyang Institute of Aeronautical Engineering
