Pascal's Theorem points of intersection of opposite sides a hexagon inscribed in a conic are collinear .
帕司卡定理：给定一个圆上的六边形，则此六边形三对对边直线的交点在同一直线上。
We can see that the points of intersection corresponding to the different curves are not lapped well but dispersed.
将不同温度对应的直线延长，它们在第一象限近似汇聚于一点。
There may be multiple points of intersection - the closest intersection (with a visible poly) to the viewer is the one that will be visible.
可能会有多个交点—距离观察者最近的交叉点(一个可视多边形的)是将可见的。
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