Separated setup code

modules/world/road_grid.h

@@ -69,6 +69,22 @@ struct half_edge {
 	float depth;
 	float length;
 };
+struct vshape {
+	AABB area;
+	int instance;
+	int e1, e2;
+	int site;
+	Vector3 p1, p2, p3;
+	float depth1, depth2;
+
+	/* filled later */
+	float total_width1,
+	      total_width2;
+	PoolVector<String> parts_list1,
+		parts_list2;
+	Ref<Curve3D> curve3;
+	Ref<Curve3D> curve3a;
+};
 class RoadDiagram {
 protected:
 	List<struct cluster> clusters;
@@ -128,19 +144,8 @@ protected:
 	Ref<RandomNumberGenerator> rnd;
 	int keep_seed;
 	List<struct cluster> clusters;
-protected:
 	Rect2 bounds;
 	static void _bind_methods();
-public:
-	struct vshape {
-		AABB area;
-		int instance;
-		int e1, e2;
-		int site;
-		Vector3 p1, p2, p3;
-		float depth1, depth2;
-	};
-protected:
 	Vector<Vector2> diagram_vertices;
 	Vector<struct map_site> map_sites;
 	Vector<struct half_edge *> map_hedges;