Added A Grid

earth.tscn

@@ -1,7 +1,8 @@
-[gd_scene load_steps=4 format=3 uid="uid://33k5v6skcbsm"]
+[gd_scene load_steps=5 format=3 uid="uid://33k5v6skcbsm"]
 
 [ext_resource type="Texture2D" uid="uid://cy70quh6k3s1j" path="res://icon.svg" id="1_qbwya"]
 [ext_resource type="Script" uid="uid://b5fhsy1xlreco" path="res://draw_circle.gd" id="2_2bhor"]
+[ext_resource type="Script" uid="uid://m3vyyfk8gnma" path="res://grid.gd" id="3_2bhor"]
 
 [sub_resource type="CircleShape2D" id="CircleShape2D_5i67w"]
 radius = 3000.0
@@ -20,3 +21,10 @@ radius = 3000.0
 
 [node name="Camera2D" type="Camera2D" parent="."]
 position = Vector2(47, -3283)
+
+[node name="Node2D" type="Node2D" parent="."]
+script = ExtResource("3_2bhor")
+ground_radius = 3000.0
+cell_height = 300.0
+num_collumns = 36
+debug = true

grid.gd

@@ -0,0 +1,23 @@
+class_name Grid extends Node2D
+
+@export var ground_radius : float
+@export var cell_height : float
+@export var num_collumns : int
+@export var debug : bool
+
+func _draw() -> void:
+	if !debug:
+		return
+
+	for i in range(10):
+		draw_arc(Vector2.ZERO, ground_radius + i * cell_height, 0, TAU, 250, Color.SKY_BLUE, 1.0, true);
+	
+	for i in range(num_collumns):
+		var angle = i * TAU / num_collumns;
+		draw_line(Vector2.ZERO, 10000 * Vector2.from_angle(angle), Color.SKY_BLUE);
+
+#func cart_to_sphere(cart : Vector2):
+	#var x = cart.x; var y = cart.y;
+	#var radius = sqrt(x*x + y*y);
+	#var angle = tan(y/x)
+	## TODO

grid.gd.uid

@@ -0,0 +1 @@
+uid://m3vyyfk8gnma