How can I extract a mesh from the nav mesh?

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I am trying to get a mesh from the nav mesh. The way that I have found is by:

 NavMeshTriangulation navMeshTriangluation = NavMesh.CalculateTriangulation();
 int[] triangles = navMeshTriangluation.indices;
 Vector3[] vertices = navMeshTriangluation.vertices;

Then I use AutoWeld from t$$anonymous$$s Unity answers page to remove the duplicates. But when I add a material of a grid square, it appears that uvs are so tight together, the object just shows the color of the grid lines.

I have also played around with High-Level NavMesh Building Components too and was unsuccessful.

I would just like a simple mesh extracted from the nav mesh and to be able to apply an material to it. Any ideas?

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Answer by Buckslice · Dec 21, 2017 at 12:04 AM

I am guessing the navmesh doesn't generate or set up uvs correctly since they don't matter for navigation at all. Lucky for you I t$$anonymous$$nk Triplanar mapping would work great for your situation. Basically it just projects a texture onto your mesh from each cardinal direction without the need for uvs.

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kingcobra1986 · Dec 22, 2017 at 08:20 PM 0

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@Buckslice I know little about shaders, when I use this it works except, when I use a transparent image, it shows black where it should be transparent. I tried changing render type to transparent and that didn't help. Do you know what else to modify?

Buckslice kingcobra1986 · Dec 23, 2017 at 02:18 AM 0

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Haven't tested this but I think you can just add 'Blend SrcAlpha OneMinusSrcAlpha' below the 'Zwrite On' line. Also make sure your texture is imported with alpha is transparency option.

kingcobra1986 · Dec 23, 2017 at 03:20 AM 0

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@Buckslice that was only part of it. I had to make x, y, and z a float4. I created a color variable for the tint with the value of 1,1,1,1 and in the surf function I added o.Alpha=z.a

How can I extract a mesh from the nav mesh?

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