边界标志算法 步骤一：以值为boundary_color的特殊颜色勾画多边形P的边界。 步骤二：逐条处理扫描线对多边形着色-Steps of the algorithm a boundary signs: the special color value boundary_color outlined polygon P boundary. Step two: one by one with the scan lines on the polygon rendering

黑盒测试（等价类划分+边界值分析+决策表方法）白盒测试（语句覆盖、分支覆盖、条件覆盖、分支/条件覆盖、条件组合覆盖及基本路径测试方法）分析三角形问题-Black box testing (equivalence class boundary value analysis+ by+ decision table method) white box (statement coverage, branch coverage, condition coverage, branch/condition c