implement 2d camera rotation

project.godot

@@ -56,6 +56,31 @@ camera_move={
 "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":32,"key_label":0,"unicode":0,"echo":false,"script":null)
 ]
 }
+camera_rotate_left_stepless={
+"deadzone": 0.5,
+"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,"echo":false,"script":null)
+]
+}
+camera_rotate_right_stepless={
+"deadzone": 0.5,
+"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,"echo":false,"script":null)
+]
+}
+camera_rotate_left_fixed_step={
+"deadzone": 0.5,
+"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,"echo":false,"script":null)
+]
+}
+camera_rotate_right_fixed_step={
+"deadzone": 0.5,
+"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,"echo":false,"script":null)
+]
+}
+camera_reset_rotation={
+"deadzone": 0.5,
+"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":4194309,"key_label":0,"unicode":0,"echo":false,"script":null)
+]
+}
 
 [rendering]
 

scenes/Main.tscn

@@ -23,11 +23,13 @@ script = ExtResource("5_8jju5")
 
 [node name="CameraZoom2D" parent="." instance=ExtResource("4_rx82t")]
 position = Vector2(1272, 720)
+ignore_rotation = false
 limit_left = 0
 limit_top = 0
 limit_right = 65536
 limit_bottom = 65536
 limit_smoothed = true
+rotation_smoothing_enabled = true
 editor_draw_limits = true
 
 [node name="UILayer" type="CanvasLayer" parent="."]

scripts/CameraZoom2D.gd

@@ -4,6 +4,7 @@ extends Camera2D
 
 var is_panning_camera = false
 var tween
+var _timer:Timer
 
 var camera_bounds:Array = [Vector2(0,0), Vector2(256*16, 256*16)]
 var chunk_in_px:Vector2i = Vector2i(Globals.CHUNK_SIZE.x*Globals.TILE_SIZE_X, Globals.CHUNK_SIZE.y*Globals.TILE_SIZE_Y)
@@ -17,8 +18,21 @@ func _on_main_worldgen_ready() -> void:
 	self.set_limit(SIDE_RIGHT, Globals.map_size*Globals.TILE_SIZE_X + chunk_in_px.x)
 	self.set_limit(SIDE_TOP, -chunk_in_px.y)
 	self.set_limit(SIDE_BOTTOM, Globals.map_size*Globals.TILE_SIZE_Y + chunk_in_px.y)	
+	
+	# create timer for repeating camera rotation
+	if !_timer:
+		_timer = Timer.new()
+		_timer.set_wait_time(0.1)
+		_timer.set_one_shot(false)
+		add_child(_timer)		
+	
+var is_camera_rotating: bool = false
 
 
+func rotate_camera(step:float) -> void:
+	self.rotation_degrees += step
+	
+
 func _on_set_camera_position(pos: Vector2) -> void:	
 	self.position = pos	
 	
@@ -26,6 +40,13 @@ func _on_set_camera_position(pos: Vector2) -> void:
 func _process(_delta) -> void:		
 	Globals.CAMERA_POSITION = self.position		
 	
+	while Input.is_action_pressed("camera_rotate_left_stepless"):
+		rotate_camera(-0.1)
+		await get_tree().create_timer(0.2).timeout
+	while Input.is_action_pressed("camera_rotate_right_stepless"):
+		rotate_camera(0.1)
+		await get_tree().create_timer(0.2).timeout
+
 
 func _ready() -> void:
 	pass
@@ -42,14 +63,21 @@ func _set_camera_zoom_level(value: float) -> void:
 		Vector2(Globals.CAMERA_ZOOM_LEVEL, Globals.CAMERA_ZOOM_LEVEL),
 		Globals.CAMERA_ZOOM_DURATION
 	)
-	
+
 	
 func _unhandled_input(event):	
 	if event.is_action_pressed("camera_zoom_in"):
 		camera_zoom_in()
 	if event.is_action_pressed("camera_zoom_out"):
 		camera_zoom_out()
-
+		
+	if event.is_action_pressed("camera_rotate_left_fixed_step"):		
+		rotate_camera(-45)
+	if event.is_action_pressed("camera_rotate_right_fixed_step"):
+		rotate_camera(45)		
+	if event.is_action_pressed("camera_reset_rotation"):
+		reset_camera_rotation()
+		
 	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT:		
 		if !is_panning_camera and event.pressed:
 			is_panning_camera = true
@@ -57,7 +85,23 @@ func _unhandled_input(event):
 			is_panning_camera = false
 
 	if event is InputEventMouseMotion and is_panning_camera:
-		self.position -= event.relative * Globals.CAMERA_PAN_MULTI
+		#var new_x = x + d * cos(theta)
+		#var new_y = y + d * sin(theta)
+		#self.position -= event.relative * Globals.CAMERA_PAN_MULTI
+		# √[(x₂ - x₁)² + (y₂ - y₁)²]
+		
+		var d = sqrt(pow(event.position.x - 2560/2, 2) + pow(event.position.y - 1440/2, 2))		
+		
+		var new_x = self.position.x + d * cos(self.rotation)
+		var new_y = self.position.y + d * sin(self.rotation)
+		
+		#var new_vect = Vector2(new_x, new_y)
+		
+		#print ("distance: " , d, " ", new_x, " ", new_y)
+		
+		self.position = Vector2(new_x, new_y)
+		#self.position -= event.relative * Globals.CAMERA_PAN_MULTI
+		
 		# prevent camera from going overboard
 		self.position.x = clamp(
 			self.position.x,
@@ -69,7 +113,7 @@ func _unhandled_input(event):
 			0,
 			Globals.map_size*Globals.TILE_SIZE_Y
 			);
-	
+			
 
 func camera_zoom_in() -> void:	
 	_set_camera_zoom_level(Globals.CAMERA_ZOOM_LEVEL - Globals.CAMERA_ZOOM_FACTOR)		
@@ -83,5 +127,9 @@ func get_camera_position():
 	return self.position
 	
 
+func reset_camera_rotation() -> void:
+	self.rotation_degrees = 0
+	
+
 
 

scripts/Main.gd

@@ -6,6 +6,10 @@
 # - Then click and drag to draw the lines of grey cubes.
 # - etc.
 
+
+# https://github.com/dfloer/SC2k-docs
+
+
 class_name Main
 extends Node2D