Implemented automatic co-op sector change sync

core/src/mindustry/maps/planet/TantrosPlanetGenerator.java

@@ -0,0 +1,21 @@
+package mindustry.maps.planet;
+
+import arc.graphics.*;
+import arc.math.*;
+import arc.math.geom.*;
+import mindustry.maps.generators.*;
+
+public class TantrosPlanetGenerator extends PlanetGenerator{
+    Color c1 = Color.valueOf("5057a6"), c2 = Color.valueOf("272766"), out = new Color();
+
+    @Override
+    public float getHeight(Vec3 position){
+        return 0;
+    }
+
+    @Override
+    public Color getColor(Vec3 position){
+        float depth = (float)noise.octaveNoise3D(2, 0.56, 1.7f, position.x, position.y, position.z) / 1.7f;
+        return c1.write(out).lerp(c2, Mathf.clamp(Mathf.round(depth, 0.15f))).a(0.6f);
+    }
+}