OutLine problem

I want to achieve the outline effect in jmonkeyengine, such as the select effect in the following figure. What should I do?


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Searching the forum you can find related posts.

Some of them that I found:

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When I need this effect, I usually draw the box twice: once with a shaded material/Box mesh and once with an unshaded material/WireBox mesh.


This will only work at very simple geometry, right? Otherwise, the inner geometry will show up as an outline as well.

Only if you turn off depth testing.

Edit: or do you just mean all of the triangle edges.

It’s somewhat assumed that OP already knows what edges they want visible. Else the solution is: (insert doctoral thesis and several years of research here)

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My solution is specifically for boxes, but could be adapted for more complex shapes.

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