公开(公告)号：US06353677B1

公开(公告)日：2002-03-05

申请号：US09219061

申请日：1998-12-22

申请人： Hanspeter Pfister ,  Abhir Hari Balerao

发明人： Hanspeter Pfister ,  Abhir Hari Balerao

IPC分类号： G06K900

CPC分类号： G06T15/40

摘要： A method renders an object including multiple volumes and polygons. The method casts a ray through the object for each pixel of an image. Each rays is partitioned into segments according to surfaces of each volume. Color and opacity values are accumulated for each segment of each ray. Starting depths of each segment are merged and sorted, in an ascending order, into a combined depth list. Consecutive pairs of starting depths are taken to perform the following steps until done. A front clip plane and a back clip plane are defined for each pair of starting depths. Polygons between the front clip plane and a next volume surface are composited, voxels between the front clip plane and the back clip plane are composited, and polygons between the next volume surface and the back clip plane are composited.

摘要翻译： 一种方法呈现包括多个卷和多边形的对象。 该方法通过对象为图像的每个像素投射光线。 每根光线根据每个卷的表面划分成多个段。 颜色和不透明度值是针对每个光线的每个片段累积的。 每个段的起始深度按升序合并并排序成一个组合的深度列表。 采取连续的起始深度对来执行以下步骤直到完成。 为每对起始深度定义前夹平面和后夹平面。 复合前夹片平面与下一个体积表面之间的多边形，前夹片平面和后夹平面之间的体素被合成，下一个体积表面和后夹平面之间的多边形被合成。