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OpenGL中的视图变换是将视见体内投影的物体显示在二维的视口平面上。()

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用光线跟踪方法渲染,自然完成物体的消隐,不用事先消隐。()

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光线跟踪算法的跟踪方向与光传播的方向是相同(相反)的,是视线跟踪。()

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According to the passage, the New Urbanists cite which one of the following as a harmful result of the need for people to travel extensively every day by automobile？

A. It imposes an extra financial burden on the residents of sprawling suburbs.
B. It increases the amount of time people spend in situations in which antisocial behavior. occurs.
C. It produces significant amounts of air pollution and thus tends to harm the quality of people"s lives.
D. It decreases the amount of time that parents spend in enjoyable interactions with their children.

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在多边形的逐边裁剪法中,对于某条多边形的边(其方向为从端点S 到端点P )与某条裁剪线(即窗口的某一边)的比较结果共有以下四种情况,分别需输出一些顶点。请问哪种情况下输出的顶点是错误的？()
A S 和P 均在可见一侧,则输出P
B S 和P 均在不可见一侧,则输出0个顶点
C S 在可见一侧,P 在不可见一侧,则输出S 和线段SP 与裁剪线的交点
D S 在不可见一侧, P 在可见一侧,则输出线段SP 与裁剪线的交点和P

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