Hacking terrain shaders

Troubleshooting
1

Hey there, I’m doing planetary renderer. While I’m being stuck at quadtrees I’ve decided to try and reuse terrain shaders provided by jme3.

What I wanted to do is to map terrain to sphere, so I did this:

    inPosition = normalize(inPosition);
    inPosition *= 100;
    gl_Position = g_WorldViewProjectionMatrix * vec4(inPosition, 1.0);

And this was the result:

So my question is, can I somehow map 6 TerrainQuads to a Sphere or am I stuck writing everything from scratch?
And if so do you have any tips because I’m not doing too well so far. (got weirdly working quadtree so far)

2

Not the easiest thing in the world to do, but thankfully somebody already did it: Jmeplanet

3

How would you go about placing models on such planet? There is no heightmap to refer to, should I raycast to find positions?

4

It seems the most appropriate way all things considered, but there must be a heightmap generated at some point. It may just be that it isn’t exposed directly.

5

There is no heightmap, values are being taken directly from math function, ive tried exposing unit vectors of a sphere though but it didnt work

6

Well use the same math function to get your height values…