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 clipping windows 裁剪窗口(2)
 裁剪窗口
 Circular and Elliptic Clipping Windows 圆形及椭圆形裁剪窗口 短句来源 In the second part, many line segment-clipping algorithms for clipping windows that have rectilinear and curvilinear border had been analyzed synthetically. 第二部分综合分析了窗口裁剪领域已有的有关线性和非线性裁剪窗口的直线段裁剪算法。 短句来源
 相似匹配句对
 Circular and Elliptic Clipping Windows 圆形及椭圆形裁剪窗口 短句来源 The Encoding Clipping Algorithm under Circular Windows 圆形窗口下的编码裁剪算法 短句来源 Optimizing of Windows Windows的优化 短句来源 The release of Windows. Windows. 短句来源 News Clipping 新闻存檔 短句来源

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 An extension to the Sutherland-Hodgman Algorithm for the polygon clipping with the overlapping edges removal is presented. A temporary vertex list and an intersection vertex list are set up when each edge of the polygon is clipped along the clipping window lines. A vertex tracing is performed thereafter to produce sub-polygons as the clipped result. The definition of these sub-polygons are the same as the input one. They do not have overlapping edges with the reentrant characteristics preserved. 本文提出一种对标准Sutherland-Hodeman多边形裁剪算法实行扩充的重迭边消去方法。这种方法在对多边形的各条边沿直线进行裁剪的时候,建立了一个中间结果顶点队列和一个交点队列,然后通过对顶点和交点进行追溯产生出作为裁剪结果的一系列子多边形。这些子多边形的定义方式与输入多边形相同,但不存在重迭的边,这样,保持了可重入性。 The clipping is an important skill of computer graphical processing. The clipping window of two dimensional graphics used to be defined as a rectangle.In this paper,the clipping algorithm of an elliptical window is discussed,and the drawing programming based on this algorithm introduced.This algorithm is simple in program structure,requiring less memory;good in auto-processing; and suitable for running on various microcomputer drawing systems.Examples show that the drawing program based... The clipping is an important skill of computer graphical processing. The clipping window of two dimensional graphics used to be defined as a rectangle.In this paper,the clipping algorithm of an elliptical window is discussed,and the drawing programming based on this algorithm introduced.This algorithm is simple in program structure,requiring less memory;good in auto-processing; and suitable for running on various microcomputer drawing systems.Examples show that the drawing program based on this algorithm is quite effective. 裁剪是计算机图形处理的重要技法。平面图形的裁剪窗口过去常被定义为矩形,本文论述了椭圆窗口的裁剪算法,并介绍了相应的绘图程序设计。该算法具有程序结构简单、占用内存少、自动处理功能强、适于在多种微机绘图系统上应用等优点。实例表明,基于该算法所设计的绘图程序是十分有效的。 A new 2-D line clipping algorithm with the least arithmetic operations is presented. It takes advantage of the regulary of the rectangular clipping window whose boundary lines are parallel to the coordinates axes. Lines are clipped successively against the two sets of parallel boundaries of the window. With the introduction of the direction for each line segment, the entry and exit boundary lines of the clipping window are classified, resulting in less intersection calculation for the... A new 2-D line clipping algorithm with the least arithmetic operations is presented. It takes advantage of the regulary of the rectangular clipping window whose boundary lines are parallel to the coordinates axes. Lines are clipped successively against the two sets of parallel boundaries of the window. With the introduction of the direction for each line segment, the entry and exit boundary lines of the clipping window are classified, resulting in less intersection calculation for the process. The new algorithm is better than the other existing ones. 本文在分析现有二维线裁剪算法的基础上,提出了具最少算术运算量的算法.新算法充分利用了矩形裁剪窗口的凸性和窗口边界线平行于坐标轴的特性,沿两组平行的窗口边界线对线段进行裁剪.通过将被裁剪线段定义为有向线段、确定窗口边界的进出边,避免了不必要的求交计算.实际算例表明,这一算法比当前国际上最快的线裁剪算法省时约一年. << 更多相关文摘
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