How to draw a patch with different front-face and back-face colors?

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Dmitry 2013-12-3

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https://ww2.mathworks.cn/matlabcentral/answers/108406-how-to-draw-a-patch-with-different-front-face-and-back-face-colors

编辑： Agustín Trujillo-Pino 2015-9-4

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Consider drawing a patch, say

patch([0 1 1], [0 0 1], [1 2 3], 1).

I want the patch sides to be of different color: say, "red" when I look at its front-face and "blue" when I look at its back side. Is it possible?

Or maybe it's possible to switch on the "back-face culling" in MATLAB?

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Alec Jacobson 2015-3-23

I'd also like to know if this is possible.

Agustín Trujillo-Pino 2015-9-4

编辑：Agustín Trujillo-Pino 2015-9-4

You need to create your own callback every time the user moves the mouse to rotate, and in that callback you compute what faces are front-facing or back-facing to the camera, and set the corresponding color for each one.

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