Introduction - If you have any usage issues, please Google them yourself
This paper describes shear-image order ray casting, a new method for volume rendering. This method renders sampled data in three dimensions with image quality equivalent to the best ofray-per-pixel volume rendering algorithms (full image order), while at the same time retaining computational complexity and spatial coherence near to that of the fastest known algorithm (shear-warp). In shear-image order, as in shear-warp, the volume data set is resampled along slices parallel to a face of the volume. Unlike shear-warp, but liketexture-based methods, rays are cast through the centers of pixels of the image plane and sample points are at the intersections of rays with each slice.