Prey is now reflected to be smooth across periodic boundary too

evolve-die-repeat/game_manager.gd

@@ -1,6 +1,10 @@
 extends Node
 
 var screen_size = Vector2(1920.0, 1080.0)  # Default screen size (this is a float for some reason)
+var viewport_size
+
+func _ready() -> void:
+	viewport_size = get_viewport().get_visible_rect().size
 
 # TODO: This needs to be called from a script inheriting a CharacterBody2D (e.g. the player)
 # Alternative would be to pass the player reference to this script (which might be better?)

evolve-die-repeat/molecular/molecular_player.gd

@@ -3,7 +3,7 @@ extends CharacterBody2D
 @export var speed = 200
 var damage = 1
 
-func _ready():
+func _ready() -> void:
 	var screen_size = get_viewport_rect().size
 	GameManager.init_screen_size(screen_size.x, screen_size.y)
 

evolve-die-repeat/molecular/nucleotide_prey.gd

@@ -2,16 +2,30 @@ extends AbstractPrey2D
 
 @onready var sprite = get_node("AnimatedSprite2D")
 
+# Mirroed 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:
 	$AnimatedSprite2D.animation = "Healthy"
 	$AnimatedSprite2D.play()
-	pass # Replace with function body.
+	
+	mirrorSprite1 = sprite.duplicate()
+	mirrorSprite2 = sprite.duplicate()
+	mirrorSprite3 = sprite.duplicate()
+
+	add_child(mirrorSprite1)
+	add_child(mirrorSprite2)
+	add_child(mirrorSprite3)
 
 
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
-	return
+	# Boundary mirroring
+	_handle_wrapping()
 
 func _physics_process(delta: float) -> void:
 	self.move(Vector3(randfn(0, 1), randfn(0, 1), 0))
@@ -42,3 +56,94 @@ func handle_collision_player(player):
 			self.die()
 		else:
 			sprite.play("Injured")
+
+# FIXME: Doesn't work with injured sprite
+# 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():
+	mirrorSprite1.visible = false
+	mirrorSprite2.visible = false
+	mirrorSprite3.visible = false
+	
+	# TODO: Assume viewport size << screen size and only draw according to GameManager.viewport_size
+	# Find corresponding section of the screen
+	if position.x < GameManager.screen_size.x/2 and position.y < GameManager.screen_size.y/2:
+		# 2
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Right
+		#mirrorSprite1.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite1.position = Vector2(GameManager.screen_size.x, 0)
+		# Diag
+		#mirrorSprite2.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite3.position = Vector2(GameManager.screen_size.x, GameManager.screen_size.y)
+		# Bottom
+		#mirrorSprite3.position = Vector2(sprite.position.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(0, GameManager.screen_size.y)
+
+		
+	elif position.x < GameManager.screen_size.x/2:
+		# 3
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Top
+		#mirrorSprite1.position = Vector2(sprite.position.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite1.position = Vector2(0, - GameManager.screen_size.y)
+		# Diag
+		#mirrorSprite2.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(GameManager.screen_size.x, - GameManager.screen_size.y)
+		# Right
+		#mirrorSprite3.position = Vector2(sprite.position.x + GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite3.position = Vector2(GameManager.screen_size.x, 0)
+		
+		
+	elif position.y < GameManager.screen_size.y/2:
+		# 1
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Left 
+		#mirrorSprite1.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite1.position = Vector2(- GameManager.screen_size.x, 0)
+		# Bottom
+		#mirrorSprite2.position = Vector2(sprite.position.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(0, GameManager.screen_size.y)
+		# Diag
+		#mirrorSprite3.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y + GameManager.screen_size.y)
+		mirrorSprite3.position = Vector2(- GameManager.screen_size.x, GameManager.screen_size.y)
+
+
+	else:
+		# 4
+		mirrorSprite1.visible = true
+		mirrorSprite2.visible = true
+		mirrorSprite3.visible = true
+		
+		# Left
+		#mirrorSprite1.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y)
+		mirrorSprite1.position = Vector2(- GameManager.screen_size.x, 0)
+		# Diag
+		#mirrorSprite2.position = Vector2(sprite.position.x - GameManager.screen_size.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite2.position = Vector2(- GameManager.screen_size.x, - GameManager.screen_size.y)
+		# Top
+		#mirrorSprite3.position = Vector2(sprite.position.x, sprite.position.y - GameManager.screen_size.y)
+		mirrorSprite3.position = Vector2(0,  - GameManager.screen_size.y)
+
+	

evolve-die-repeat/molecular/preyManager.gd

@@ -25,3 +25,4 @@ func spawn_creature(scene, position: Vector2) -> void:
 	var instance = scene.instantiate()
 	instance.position = position
 	add_child(instance)
+