point-in-polygon operations 区中点运算
point-in-polygon query 点包含判断
point in polygon testing 点包容检测
point-in-polygon analysis 点面包含分析
point-in-polygon operation 多边形内点判断
Each point of the polygon is added to the temporary shape on line 23, and if it's the first point in the polygon, its location is recorded as the placement for the text annotating that piece.
多边形的各个点都将被添加到第23行的临时图形中，并且如果它是多边形中的第一个点，则把其位置记录为注释该部分的文本的位置。
As you see in Figure 4, The solution to the point-in-polygon problem is to draw a horizontal line starting at the point in question.
如图 4 中所示，点包容问题的解决方案是绘制一条从所关注的点开始的水平线。
In this paper, based on object-oriented design, we design an efficient solid model for 3-dimension object constructed by point, straight line and polygon to accomplish hidden-line detection method.
文中应用面向对象的设计方法 ，针对消除隐藏线算法 ，为由点、直线段、多边形构成的立体图形设计了一种实体模型 ，该实体模型具有封装性和可维护性等面向对象设计方法的优点。
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