Horizontal room wrap controller (from Celsius)

Author: maddie480

Ahorn/entities/horizontalRoomWrapController.jl

@@ -0,0 +1,21 @@
+module SpringCollab2020HorizontalRoomWrapController
+
+using ..Ahorn, Maple
+
+@mapdef Entity "SpringCollab2020/HorizontalRoomWrapController" HorizontalRoomWrapController(x::Integer, y::Integer)
+
+const placements = Ahorn.PlacementDict(
+    "Horizontal Room Wrap Controller (Spring Collab 2020)" => Ahorn.EntityPlacement(
+        HorizontalRoomWrapController
+    )
+)
+
+function Ahorn.selection(entity::HorizontalRoomWrapController)
+    x, y = Ahorn.position(entity)
+
+    return Ahorn.Rectangle(x - 12, y - 12, 24, 24)
+end
+
+Ahorn.render(ctx::Ahorn.Cairo.CairoContext, entity::HorizontalRoomWrapController, room::Maple.Room) = Ahorn.drawSprite(ctx, "ahorn/SpringCollab2020/horizontal_room_wrap", 0, 0)
+
+end

Entities/HorizontalRoomWrapController.cs

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+using Celeste.Mod.Entities;
+using Monocle;
+
+namespace Celeste.Mod.SpringCollab2020.Entities {
+    /// <summary>
+    /// A controller creating a horizontal room wrap effect in the room it is placed in.
+    /// Pulled straight from Celsius by 0x0ade.
+    /// </summary>
+    [CustomEntity("SpringCollab2020/HorizontalRoomWrapController")]
+    public class HorizontalRoomWrapController : Entity {
+        public override void Update() {
+            base.Update();
+
+            Camera camera = SceneAs<Level>().Camera;
+            Player player = Scene.Tracker.GetEntity<Player>();
+            if (player != null) {
+                if (player.Left > camera.Right + 12f) {
+                    // right -> left wrap
+                    player.Right = camera.Left - 4f;
+                } else if (player.Right < camera.Left - 4f) {
+                    // left -> right wrap
+                    player.Left = camera.Right + 12f;
+                }
+            }
+        }
+    }
+
+}