ft: extracted mirrorSprite to custom node

evolve-die-repeat/shared/wrapping_manager.gd

@@ -0,0 +1,82 @@
+class_name WrappingManager extends Node
+
+@export var sprite: AnimatedSprite2D 
+
+# Mirrored sprites for periodic boundary
+var mirrorSprite1: Node2D
+var mirrorSprite2: Node2D
+var mirrorSprite3: Node2D
+
+
+# Called when the node enters the scene tree for the first time.
+func _ready() -> void:
+	await owner.ready
+	mirrorSprite1 = sprite.duplicate()
+	mirrorSprite2 = sprite.duplicate()
+	mirrorSprite3 = sprite.duplicate()
+
+	owner.add_child(mirrorSprite1)
+	owner.add_child(mirrorSprite2)
+	owner.add_child(mirrorSprite3)
+	
+	_handle_wrapping()
+
+func play_sprite(anim: String) -> void:
+	mirrorSprite1.play(anim)
+	mirrorSprite2.play(anim)
+	mirrorSprite3.play(anim)
+
+func _process(delta: float) -> void:
+	_handle_wrapping()
+	
+	
+# Mirroring table:
+# |---|---|---|---|
+# | 4 | 3 | 4 | 3 |
+# |---|===|===|---|
+# | 1 ǁ 2 | 1 ǁ 2 |
+# |---ǁ---|---ǁ---|
+# | 4 ǁ 3 | 4 ǁ 3 |
+# |---|===|===|---|
+# | 1 | 2 | 1 | 2 |
+# |---|---|---|---|
+# If less than viewport size away from an edge, mirror over that edge (for seamless boundary)
+# NOTE: For this to look correctly the camera size should be smaller than half the screen port (in
+# 		any one dimension. Ideally, the difference between camera size and half the screen port is 
+# 		at least the size of the prey sprite)
+func _handle_wrapping():
+	# TODO: Assume viewport size << screen size and only draw according to GameManager.viewport_size
+	# Find corresponding section of the screen
+	if owner.position.x < GameManager.screen_size.x/2 and owner.position.y < GameManager.screen_size.y/2:
+		# Right
+		mirrorSprite1.global_position = owner.global_position + Vector2(GameManager.screen_size.x, 0)
+		# Diag
+		mirrorSprite3.global_position = owner.global_position + Vector2(GameManager.screen_size.x, GameManager.screen_size.y)
+		# Bottom
+		mirrorSprite2.global_position = owner.global_position + Vector2(0, GameManager.screen_size.y)
+
+		
+	elif owner.position.x < GameManager.screen_size.x/2:
+		# Top
+		mirrorSprite1.global_position = owner.global_position +  Vector2(0, - GameManager.screen_size.y)
+		# Diag
+		mirrorSprite2.global_position = owner.global_position +  Vector2(GameManager.screen_size.x, - GameManager.screen_size.y)
+		# Right
+		mirrorSprite3.global_position = owner.global_position +  Vector2(GameManager.screen_size.x, 0)
+		
+		
+	elif owner.position.y < GameManager.screen_size.y/2:
+		# Left 
+		mirrorSprite1.global_position = owner.global_position +  Vector2(- GameManager.screen_size.x, 0)
+		# Bottom
+		mirrorSprite2.global_position = owner.global_position +  Vector2(0, GameManager.screen_size.y)
+		# Diag
+		mirrorSprite3.global_position = owner.global_position +  Vector2(- GameManager.screen_size.x, GameManager.screen_size.y)
+
+	else:
+		# Left
+		mirrorSprite1.global_position = owner.global_position +  Vector2(- GameManager.screen_size.x, 0)
+		# Diag
+		mirrorSprite2.global_position = owner.global_position +  Vector2(- GameManager.screen_size.x, - GameManager.screen_size.y)
+		# Top
+		mirrorSprite3.global_position = owner.global_position +  Vector2(0,  - GameManager.screen_size.y)