MIT AI course Constraints

最新推荐文章于 2024-12-31 12:59:37 发布

原创最新推荐文章于 2024-12-31 12:59:37 发布 · 269 阅读

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本文详细介绍了如何区分几何体上的凹线、凸线及边界线。通过观察线两侧的面数量及其角度，可以判断线的性质。当线两侧各有一个面时，依据两面夹角判断线为凹或凸；若一线侧为空间，则该线为边界线。文中还说明了箭头方向确定规则，确保读者能准确理解线条特性。

you could't make it because it need 4 faces junctions

18 junctions

some comments below:

I want to clarify how to distinguish the concave, convex, and boundary lines. 1. If you see 2 faces on each side of a line, then the line is a concave or convex line, depending on the angle of the 2 faces: angle > 180 is convex, and angle < 180 is concave. 2. If you see 1 surface on a side of a line, on another side, it is space, air, or nothing, then, the line is a boundary line. The way to determine the direction of the arrow on the line: the surface(object) you see is always on the right side of the arrow. i.e. if the arrow points to left in a horizontal boundary line, then the surface(object) is above the line; if the arrow points to up in a vertical boundary line, then the surface(object) is on the right side of the line. If I am not clear enough, leave a message here to ask me.