Outputting the heightmap of a SCMDeformableTerrain?

[Whop42 Whop42]

Hi,

I'm simulating an object deforming soil, and would like to have the data in the form of a heightmap. I have a simulation rendering properly with a SCMDeformableTerrain instance, but how do I get the information out of that into a .png or something similar?

Thanks,

whop42

[huwe...@gmail.com]

Take a look at this demo at line327, I think that might be what you would like to find.

Thank you,

Wei

[Radu Serban]

Wei – this is not what the original poster asked for.

 

Whop42 – we do not have a function for exporting the deformed state of an SCM terrain patch as a heightmap. I’d be curious to know why you would want that in the first place.  Nonetheless, you can generate a heightmap image yourself (e.g., with STB which is what we use to initialize an SCM patch from a heightmap). To do that, you can extract the current height of the SCM terrain at the locations you are interested in (SCMDeformableTerrain::GetHeight) or else grab the current visualization mesh ( SCMDeformableTerrain::GetMesh) and then convert these heights to grayscale and load an image pixel-by-pixel, effectively doing the reverse of what we do in SCMDeformableSoil::Initialize.

 

--Radu

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[Whop42 Whop42]

Thank you, that was exactly what I was looking for.

[Whop42 Whop42]

Hello again,

I have run into a problem with this approach (although i suspect it's just my code.) I used the SCMDeformableTerrain's mesh's ChTriangleMeshConnected to gather a list of all the vertices in the mesh. I then added the heights to a 2D list (and normalized them), then dumped them into a grayscale image. However, the image turns out unintelligible (example attached.) It's supposed to be a shoeprint, imprinted from a (3D-scanned) .obj of a shoe.

Here's the code: https://gist.github.com/Whop42/43d496e42d8c8f227b53ada1d3da7502

Print in Irrlicht:

How do I rectify this problem and make the print show up, like it is in Irrlicht?