 |
Attention | Topic was automatically imported from the old Question2Answer platform. |
 |
Asked By | DaddyMonster |
I’ve got a planet with spherical terrain. It’s essentially a quadsphere except each face is made up of individual planes as part of an LOD chunk system.
I just want to get the slope of the landscape for texturing. This would normally be all you need:
float dotp_loc = dot(normalize(VERTEX), NORMAL);
but VERTEX is local space and each plane mesh is only a small section of the whole sphere whereas I need the dot from the centre of the sphere (at vec3(0.0) worldspace). So, I expected this to work:
float dotp_glob = dot(normalize((WORLD_MATRIX * vec4(VERTEX, 1.0)).xyz), (WORLD_MATRIX * vec4(NORMAL, 0.0)).xyz);
but it’s giving me the dot product from the origin of each plane mesh. At least I think that’s what it’s doing. If this were gdscript I’d take the xform of the transform but I’m not sure what to do in the shader.
Any suggestions appreciated.