How to draw the outline of a selected mesh the way Blender does it?

Questions
1

Hello,

I’m trying to draw the outline of a selected mesh.
As shown in the image below captured in Blender, I want to draw the border of the mesh as is, even if it is obscured by the mesh in front.

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image403×304 19.2 KB

I tried two things: https://playground.babylonjs.com/#KRYSHR#1

(1) Using the renderOutline property: Outlines hidden by other meshes are not drawn.

image
image321×253 1.78 KB

(2) Using HighlightLayer: Outlines surrounding the visible part are drawn, excluding the hidden part.(Comment out line 21 and uncomment line 24)

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image317×248 9.37 KB

Is there anyone who can help me?

2

If you’re ok with all edges showing, you can clone the box, then on the clone make alpha zero, turn on edges, and set renderingGroupId to 1.

Edit: or a similar technique with the highlight layer:

Edit2: renderOutline obeys the material alpha. It’s not immediately obvious to me how to get a transparent box with an opaque outline.

1 Like
3

here’s a good thread with more iptions:

4

@HiGreg
Thank you :smiley:

Your answer is very helpful. I was able to achieve the solution using target mesh cloning, renderingGroupId and visibility attribute.

This forum is really awesome! :+1:

3 Likes