由于使用三角形条带或三角扇形时重复的顶点较少,因此使用它们比使用三角形列表效率更高。
Using triangle strips or triangle fans is often more efficient than using triangle lists because fewer vertices are duplicated.
如下图所示,他的方法不是仅仅针对一车的人,而是走之字形策略,从一角开始,所牵涉的人成扇形散布开来。
Instead of tending to just one bus, he zigs and zags through the diagram, fanning out from the corner as shown below.
配上不同的颜色玻璃和不同的发散透镜,可获得各种颜色、各种发散角的扇形光束。
Sector beams in different colors and with different angles of divergence are available when equipped with different color and divergent lenses.
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