Create throughs instead of peaks with Mesh.CreatePlaneFromHeightMap

[alanz2223]

Is there a way to specify to the mesh to create troughs (valleys) instead of peaks?  I would like to simulate the lunar surface.

BABYLON.Mesh.CreatePlaneFromHeightMap();

 

[GameMonetize]

I guess you can rotate it on X axis to revert it?

[GameMonetize]

And I did not test but you can try to use negative value for heights:

https://github.com/BabylonJS/Babylon.js/blob/master/src/Mesh/babylon.mesh.ts#L1743

[alanz2223]

Well if you go that route then you can only have troughs or peaks, ideally you want both to simulate a real landscape. Do you know what color the algorithm bases altitude on? like pure white = minimum height, pure black = maximum height. Because what might work would be setting an offset so that your common ground is actually higher which coulb be a grey color, and then valleys are pure white and mountains are black. But this also seems hackish and I could run into bottlenecks when using a noise algorithm to create height maps.

[GameMonetize]

That's the power of open source, you can read the code  

Here is the formula used : https://github.com/BabylonJS/Babylon.js/blob/master/src/Mesh/babylon.mesh.vertexData.ts#L1330

 

Based on this I guess that negative values should work

 

[Pryme8]

Black is Down white is Up. if you want a lunar surface just adjust your height map...  you dont have to invert anything on the displacement calculations, just the colors of your heightmap image. 

Have you checked out solutions like WorldMachine for generating heightmaps?  A lunar one would be fast and easy and you could even generate wear and flow maps.

50% grey is flat and you can decide when you call the heightmap model if it goes down and up from the 0 point or just up (I might be making this second part up but I think its right).