Added player

game-of-life-test/gol.gd

@@ -1,6 +1,6 @@
 extends Sprite2D
 
-var n: int = 256
+var n: int = 64
 var arr := []
 
 var data_img: Image
@@ -14,6 +14,13 @@ var gol := GoL.new()
 var T := 0.01
 var t := 0.0
 
+# player (2x2 block)
+var player_alive := true
+var player_col := 10
+var player_row := 10
+var PLAYER_SHAPE := [Vector2i(0,0), Vector2i(1,0), Vector2i(0,1), Vector2i(1,1)]
+
+
 # Called when the node enters the scene tree for the first time.
 func _ready() -> void:
 	data_img = Image.create(n, n, false, Image.FORMAT_R8)
@@ -23,8 +30,10 @@ func _ready() -> void:
 	mat.set_shader_parameter("binDataTex", data_tex)
 	mat.set_shader_parameter("n", n)
 
-	# init
+	# player
+	_seed_clear()
 	_fill_example()
+	_spawn_player(20, 10)
 	_upload_arr()
 	
 
@@ -37,11 +46,21 @@ func _upload_arr() -> void:
 	
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(_delta: float) -> void:
+	if Input.is_action_just_pressed("move_right"):
+		_move_player(1, 0)
+	if Input.is_action_just_pressed("move_left"):
+		_move_player(-1, 0)
+	if Input.is_action_just_pressed("move_up"):
+		_move_player(0, -1)
+	if Input.is_action_just_pressed("move_down"):
+		_move_player(0, 1)
+			
 	t += _delta
 	if t >= T:
 		t = 0.0
-		#_game_of_life_step()
+		_game_of_life_step()
-		arr = gol.step_once(arr, n)  # cpp step
+		# arr = gol.step_once(arr, n)  # cpp step (no player)
+		_track_player_after_step()
 		_upload_arr()
 
 func _game_of_life_step() -> void:
@@ -75,8 +94,35 @@ func _count_neighs(x:int, y:int) -> int:
 	return ans
 	
 
+func _track_player_after_step() -> void:
+	if not player_alive:
+		return
+	var best_count := -1
+	var best_shift := Vector2i(0, 0)
+
+	# search a 5x5 neighborhood for where the 2x2 footprint moved
+	for dy in range(-2, 3):
+		for dx in range(-2, 3):
+			var cnt := 0
+			for off in PLAYER_SHAPE:
+				var x:int = (player_col + off.x + dx + n) % n
+				var y:int = (player_row + off.y + dy + n) % n
+				cnt += arr[y][x]
+			if cnt > best_count:
+				best_count = cnt
+				best_shift = Vector2i(dx, dy)
+
+	# if nothing from the footprint survived, the player is dead
+	if best_count <= 0:
+		player_alive = false
+		print("Player dead!")
+		return
+
+	player_col = (player_col + best_shift.x + n) % n
+	player_row = (player_row + best_shift.y + n) % n
+
+
 func _fill_example() -> void:
-	arr.clear()
 	#_checkerboard()
 	_ship()
 
@@ -105,3 +151,46 @@ func _ship() -> void:
 	arr[2][0] = 1
 	arr[2][1] = 1
 	arr[2][2] = 1
+	
+	
+# Player
+func _write_player(val:int) -> void:
+	for off in PLAYER_SHAPE:
+		var x:int = (player_col + off.x + n) % n
+		var y:int = (player_row + off.y + n) % n
+		arr[y][x] = val
+
+func _spawn_player(col:int, row:int) -> void:
+	player_col = (col + n) % n
+	player_row = (row + n) % n
+	player_alive = true
+	_write_player(1)
+	_upload_arr()
+
+func _despawn_player() -> void:
+	if player_alive:
+		_write_player(0)
+	player_alive = false
+	_upload_arr()
+
+func _move_player(dx:int, dy:int) -> void:
+	if not player_alive:
+		return
+	# erase old footprint
+	_write_player(0)
+	# move
+	player_col = (player_col + dx + n) % n
+	player_row = (player_row + dy + n) % n
+	# write new footprint
+	_write_player(1)
+	_upload_arr()
+
+
+# Clear
+func _seed_clear() -> void:
+	arr.clear()
+	for _y in n:
+		var row := []
+		for _x in n:
+			row.append(0)
+		arr.append(row)

game-of-life-test/player.gd

@@ -0,0 +1,23 @@
+extends Area2D
+
+@export var speed = 400 # How fast the player will move (pixels/sec).
+var screen_size # Size of the game window.
+
+func _ready() -> void:
+	screen_size = get_viewport_rect().size
+
+func _process(delta):
+	var velocity = Vector2.ZERO # The player's movement vector.
+	if Input.is_action_pressed("move_right"):
+		velocity.x += 1
+	if Input.is_action_pressed("move_left"):
+		velocity.x -= 1
+
+	if velocity.length() > 0:
+		velocity = velocity.normalized() * speed
+		$AnimatedSprite2D.play()
+	else:
+		$AnimatedSprite2D.stop()
+		
+	position += velocity * delta
+	position = position.clamp(Vector2.ZERO, screen_size)

game-of-life-test/player.gd.uid

@@ -0,0 +1 @@
+uid://cvxhfc50fgdyb

game-of-life-test/project.godot

@@ -19,3 +19,26 @@ config/icon="res://icon.svg"
 
 window/size/viewport_width=1920
 window/size/viewport_height=1920
+
+[input]
+
+move_right={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194321,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}
+move_left={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194319,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}
+move_up={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194320,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}
+move_down={
+"deadzone": 0.2,
+"events": [Object(InputEventKey,"resource_local_to_scene":false,"resource_name":"","device":0,"window_id":0,"alt_pressed":false,"shift_pressed":false,"ctrl_pressed":false,"meta_pressed":false,"pressed":false,"keycode":0,"physical_keycode":4194322,"key_label":0,"unicode":0,"location":0,"echo":false,"script":null)
+]
+}