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回報翻譯問題
討論區規矩與守則
5 
檢舉此篇文章
What is the least amount of points to make a flat polygon (face)?
1? No that would just be a point.
2? No that would be a line.
3? Yup! You can definitely make a single flat surface no matter what as long as the three point vectors are linearly independent.
4? Nope. You can technically have non-faces with 4 points.
Let's take a look:
From the top, both these polygons look flat (left is a quad, right is a tri):
http://i.imgur.com/BSCQ9PB.png
However, you'll notice that from a different angle, the 4-faced polygon isn't actually flat...
http://i.imgur.com/lCLn9w2.png
3D Programs can work with quads just fine, but engines limit their models to tris because that is the minimum amount to make faces. When you export your own models via the smd exporter, you'll notice that it automatically triangulates your model (Try it: Export a test model as an smd file > import it back into blender > suddenly it will be made up of tris instead of quads).
Obviously modelers don't model with tris... They model with quads first, and then go in and detail (manually editing stuff, sculpting, etc).
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why did i ctrl + T and then save?!??!? T-T
xD