ft: nucleotide prey FSM

evolve-die-repeat/molecular/prey/nucleotide_prey.gd

@@ -0,0 +1,152 @@
+extends AbstractPrey2D
+
+@onready var sprite = get_node("AnimatedSprite2D")
+@onready var fsm = $StateMachine
+
+# 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:
+	health = maxHealth
+	sprite.play("Healthy")
+	
+	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:
+	# Boundary mirroring
+	_handle_wrapping()
+
+func _physics_process(delta: float) -> void:
+	#self.move(Vector3(randfn(0, 1), randfn(0, 1), 0))
+	# TODO: state transition logic (bot controller code)
+	pass
+
+func move(motion: Vector3) -> void:
+	move_and_collide(Vector2(motion.x, motion.y))  # Moves along the given vector
+	
+	# Apply boundary to new position
+	position = GameManager.get_boundaried_position(position)
+
+func handle_damage(dmg: int, src: Node) -> void:
+	health = max(0, health-dmg)
+	if health == 0:
+		die()
+	if health < maxHealth:
+		become_injured()
+	fsm.transition_to_next_state(fsm.States.FLEEING, {"threat": src})
+	
+func die() -> void:
+	sprite.play("Dying")
+	super.die()
+
+func become_injured() -> void:
+	sprite.play("Injured")
+	mirrorSprite1.play("Injured")
+	mirrorSprite2.play("Injured")
+	mirrorSprite3.play("Injured")
+
+# 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)
+
+	
+
+
+func _on_timer_timeout() -> void:
+	pass # Replace with function body.