Sphere 圆球体 2.Getting points on the surface of a sphere 圆球体表面取点 Method:Circle method 辅助纬圆法 方法 Distinguish:Limit elements are usually the boundary between visible 判别 and invisible regions of the corresponding projection direction 转向轮廓线通常是回转面上对某投射方向可见部分 与不可见部分的分界线。 棕 All invisible points are written in brackets. 对不可见的点加括号以示区别。 Example3.Draw a sphere and get points on the surface. 画圆球及表面上点的三视图 请点击鼠标左键显示后面内容8 2.Getting points on the surface of a sphere 圆球体表面取点 请点击鼠标左键显示后面内容 Example3. Draw a sphere and get points on the surface. 画圆球及表面上点的三视图 Sphere 圆球体 Circle method 辅助纬圆法 Limit elements are usually the boundary between visible and invisible regions of the corresponding projection direction. 转向轮廓线通常是回转面上对某投射方向可见部分 与不可见部分的分界线。 All invisible points are written in brackets. 对不可见的点加括号以示区别。 Method： 方法 Distinguish: 判别 Label： 标注