公开(公告)号：US5761400A

公开(公告)日：1998-06-02

申请号：US520056

申请日：1995-08-28

申请人： Herbert G. Derby ,  Brent Pease

发明人： Herbert G. Derby ,  Brent Pease

IPC分类号： G06T15/40 ,  G06F15/72 ,  G06F15/62

CPC分类号： G06T15/405

摘要： A method for increasing the speed of a Z-buffer process. The method operates on the observation that groups of points in a scan-line of a polygon are either all visible or all obscured by existing points in the frame buffer. The method processes visible points separately from obscured points. The method only calculates changes in point intensity for the groups of visible points. In addition, the termination of the two separate processes is controlled by placing sentinels at the edge of each scan-line of the polygon so that the comparison of the point's z-values also act as a check for process termination.

摘要翻译： 一种提高Z缓冲过程速度的方法。 该方法基于观察到多边形的扫描线中的点组全部可见或全部被帧缓冲器中的现有点遮蔽。 该方法与隐蔽点分开处理可见点。 该方法仅计算可见点组的点强度变化。 另外，通过将哨点放置在多边形的每个扫描线的边缘来控制两个单独进程的终止，以便点的z值的比较也用作过程终止的检查。