Planet rendering infrastructure stuff

core/src/mindustry/graphics/g3d/HexMesher.java

@@ -7,4 +7,7 @@ import arc.math.geom.*;
 public interface HexMesher{
     float getHeight(Vec3 position);
     Color getColor(Vec3 position);
+    default boolean skip(Vec3 position){
+        return false;
+    }
 }

core/src/mindustry/graphics/g3d/MeshBuilder.java

@@ -48,6 +48,9 @@ public class MeshBuilder{
         begin(grid.tiles.length * 12 * (3 + 3 + 1));
 
         for(Ptile tile : grid.tiles){
+            if(mesher.skip(tile.v)){
+                continue;
+            }
 
             Corner[] c = tile.corners;
 

core/src/mindustry/graphics/g3d/PlanetRenderer.java

@@ -158,22 +158,11 @@ public class PlanetRenderer implements Disposable{
         }
 
         if(cam.frustum.containsSphere(planet.position, planet.clipRadius) && planet.parent != null && planet.hasAtmosphere && Core.settings.getBool("atmosphere")){
-            Gl.depthMask(false);
-
-            Blending.additive.apply();
-
-            Shaders.atmosphere.camera = cam;
-            Shaders.atmosphere.planet = planet;
-            Shaders.atmosphere.bind();
-            Shaders.atmosphere.apply();
-
-            atmosphere.render(Shaders.atmosphere, Gl.triangles);
-
-            Blending.normal.apply();
-
-            Gl.depthMask(true);
+            planet.drawAtmosphere(atmosphere, cam);
         }
 
+        planet.drawClouds(cam.combined, planet.getTransform(mat));
+
         for(Planet child : planet.children){
             renderTransparent(child);
         }