
给定一个非边界边,将其从当前端点逆时针旋转一步到顶点。
图片来源: https://github.com/CMU-Graphics/Scotty3D/blob/main/assignments/A2.md

给定一条边,在中间添加一个顶点,并沿着边从新添加的顶点到面中按边逆时针顺序排列的下一个顶点细分相邻的非边界面。
图片来源: https://github.com/CMU-Graphics/Scotty3D/blob/main/assignments/A2.md

将边的两个端点合并到边的中点。这会将到两个端点的所有边合并为一个新顶点(注意不要让两条边重叠)。
图片来源: https://github.com/CMU-Graphics/Scotty3D/blob/main/assignments/A2.md

挤出面用四边形环包围一个面,这样就可以通过“挤出位置”辅助功能移动和/或收缩该面。
图片来源: https://github.com/CMU-Graphics/Scotty3D/blob/main/assignments/A2.md
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