allow modded planets to customize drawing

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

@@ -110,8 +110,10 @@ public class PlanetRenderer implements Disposable{
     }
 
     private void renderPlanet(Planet planet){
+        if(!planet.visible()) return;
+
         //render planet at offsetted position in the world
-        planet.mesh.render(cam.combined, planet.getTransform(mat));
+        planet.render(cam.combined, planet.getTransform(mat));
 
         renderOrbit(planet);
 

core/src/mindustry/type/Planet.java

@@ -264,4 +264,12 @@ public class Planet extends UnlockableContent{
     public ContentType getContentType(){
         return ContentType.planet;
     }
+
+    public boolean visible(){
+        return true;
+    }
+
+    public void draw(Mat3D projection, Mat3d Transform){
+        mesh.render(projection, transform);
+    }
 }