From cddd0a496fcc6404f1024c4e515f1e20a31a2d6c Mon Sep 17 00:00:00 2001
From: Jan Tuomi <jan@jantuomi.fi>
Date: Sat, 29 Nov 2025 12:57:36 +0200
Subject: Add momentum to swinging

---
 computer.gd                  |   2 +-
 docs/index.html              |   2 +-
 docs/index.pck               | Bin 3865528 -> 3865560 bytes
 docs/index.service.worker.js |   2 +-
 player.gd                    |  24 +++++++++++-------------
 ps_curve.gd                  |   2 +-
 ps_hanging.gd                |  26 +++++++++++++++++++++-----
 transition_player.gd         |   6 +++---
 8 files changed, 39 insertions(+), 25 deletions(-)

diff --git a/computer.gd b/computer.gd
index ffd1b4c..1e5bcb9 100644
--- a/computer.gd
+++ b/computer.gd
@@ -5,4 +5,4 @@ extends Sprite2D
 @export var reverse: bool
 
 func _on_area_2d_body_entered(player: Player) -> void:
-	player.set_movement_curve(path.curve, speed, reverse)
+	player.request_state_curve(path.curve, speed, reverse)
diff --git a/docs/index.html b/docs/index.html
index 3aca742..1e16f0c 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -112,7 +112,7 @@ body {
 
 		<script src="index.js"></script>
 		<script>
-const GODOT_CONFIG = {"args":[],"canvasResizePolicy":2,"emscriptenPoolSize":8,"ensureCrossOriginIsolationHeaders":true,"executable":"index","experimentalVK":false,"fileSizes":{"index.pck":3865528,"index.wasm":38034280},"focusCanvas":true,"gdextensionLibs":[],"godotPoolSize":4,"serviceWorker":"index.service.worker.js"};
+const GODOT_CONFIG = {"args":[],"canvasResizePolicy":2,"emscriptenPoolSize":8,"ensureCrossOriginIsolationHeaders":true,"executable":"index","experimentalVK":false,"fileSizes":{"index.pck":3865560,"index.wasm":38034280},"focusCanvas":true,"gdextensionLibs":[],"godotPoolSize":4,"serviceWorker":"index.service.worker.js"};
 const GODOT_THREADS_ENABLED = false;
 const engine = new Engine(GODOT_CONFIG);
 
diff --git a/docs/index.pck b/docs/index.pck
index c669e15..2ef95fb 100644
Binary files a/docs/index.pck and b/docs/index.pck differ
diff --git a/docs/index.service.worker.js b/docs/index.service.worker.js
index c2f5364..362e564 100644
--- a/docs/index.service.worker.js
+++ b/docs/index.service.worker.js
@@ -4,7 +4,7 @@
 // Incrementing CACHE_VERSION will kick off the install event and force
 // previously cached resources to be updated from the network.
 /** @type {string} */
-const CACHE_VERSION = '1764363858|27701075135';
+const CACHE_VERSION = '1764413754|33126432540';
 /** @type {string} */
 const CACHE_PREFIX = 'MobileMetroidvan-sw-cache-';
 const CACHE_NAME = CACHE_PREFIX + CACHE_VERSION;
diff --git a/player.gd b/player.gd
index a7cb2f3..0798855 100644
--- a/player.gd
+++ b/player.gd
@@ -12,12 +12,6 @@ var state: PlayerState = PlayerStateInit.new(self)
 
 var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")
 
-func get_facing() -> int:
-	if $AnimatedSprite2D.flip_h:
-		return -1
-	else:
-		return 1
-
 # Called every frame. 'delta' is the elapsed time since the previous frame.
 func _process(delta: float) -> void:
 	state._handle(delta)
@@ -25,26 +19,30 @@ func _process(delta: float) -> void:
 func _physics_process(delta: float):
 	state._handle_physics(delta)
 
-#region movement type setters
-func set_movement_normal():
+func request_state_normal():
 	state = PlayerStateNormal.new(self)
 	
-func set_movement_forced(dir: String):
+func request_state_forced(dir: String):
 	if state is PlayerStateForced: return
 
 	state = PlayerStateForced.new(self, dir)
 
-func set_movement_curve(curve: Curve2D, c_speed: float, c_reverse: bool):
+func request_state_curve(curve: Curve2D, c_speed: float, c_reverse: bool):
 	if state is PlayerStateCurve: return
 
 	state = PlayerStateCurve.new(self, curve, c_speed, c_reverse)
 
-func set_movement_hanging(target: Node2D, hang_dist: float):
+func request_state_hanging(target: Node2D, hang_dist: float):
 	if state is PlayerStateHanging: return
 	if not PlayerStateHanging.can_hang_from(self, target): return
 
 	state = PlayerStateHanging.new(self, target, hang_dist)
-#endregion
+
+func get_facing() -> int:
+	if anim_sp.flip_h:
+		return -1
+	else:
+		return 1
 
 func handle_action_input():
 	var hooks = get_tree().get_nodes_in_group("hook_hanging")
@@ -57,4 +55,4 @@ func handle_action_input():
 		var dist = (hook.global_position - global_position).length()
 		print_debug("found hook: ", hook, ", dist: ", dist)
 		if dist < hook_distance_max:
-			set_movement_hanging(hook, hook.hang_distance)
+			request_state_hanging(hook, hook.hang_distance)
diff --git a/ps_curve.gd b/ps_curve.gd
index ab5c327..c1c1567 100644
--- a/ps_curve.gd
+++ b/ps_curve.gd
@@ -36,7 +36,7 @@ func _handle_physics(delta: float):
 	p.velocity = (new_position - p.position) / delta
 
 	if finished:
-		p.set_movement_normal()
+		p.request_state_normal()
 		return
 
 	p.position = new_position
diff --git a/ps_hanging.gd b/ps_hanging.gd
index 0b3b80b..50bd6b1 100644
--- a/ps_hanging.gd
+++ b/ps_hanging.gd
@@ -15,6 +15,8 @@ var travel_to: Vector2
 var T_mlem: float = 0.2
 var T_travel: float = 0.1
 
+var swing_force: float = 0.2
+
 enum S { MLEMING, TRAVELING, HANGING }
 var state: S = S.MLEMING
 
@@ -24,12 +26,15 @@ func _init(pl: Player, h_target: HookHanging, h_dist: float) -> void:
 	t = 0
 	L = h_dist
 	target = h_target
-	w = sqrt(p.gravity / L) * 0.8
+	w = sqrt(p.gravity / L) * 0.7
+	
+	var dx = target.global_position.x - pl.global_position.x
+	pl.anim_sp.flip_h = dx < 0
 
 	state = S.MLEMING
 
 func _to_string() -> String:
-	return "PlayerStateHanging %s, θ₀ = %f" % [S.keys()[state], theta0]
+	return "PlayerStateHanging %s, θ₀ = %f, θ = %f" % [S.keys()[state], theta0, last_theta]
 
 static func can_hang_from(pl: Player, c_target: HookHanging) -> bool:
 	var d = c_target.global_position - pl.global_position
@@ -100,12 +105,23 @@ func _hang(delta: float):
 	if Input.is_action_just_pressed("jump"):
 		p.velocity.y = -p.jump_strength
 		tongue.queue_free()
-		p.set_movement_normal()
+		p.request_state_normal()
 
 	var theta = theta0 * cos(t * w)
+
+	# Allow player to add momentum by moving toward the swing direction
+	var dtheta = theta - last_theta
+	var momentum = Input.get_axis("move_right", "move_left")
+	var momentum_dir = sign(momentum) * sign(dtheta)
+	theta0 += momentum_dir * sign(theta0) * swing_force * delta
+
+	# Limit max swinging height to horizontal by
+	# lerping theta0 to 90deg at the bottom of the swing
+	if abs(theta0) > PI / 2 and abs(theta) < PI / 8:
+		theta0 = lerp(theta0, sign(theta0) * PI / 2, 0.8)
 	
-	if sign(theta) != sign(last_theta) and abs(theta0) > PI / 2:
-		theta0 = sign(theta0) * PI / 2
+	#if sign(theta) != sign(last_theta) and abs(theta0) > PI / 2:
+	#	theta0 = sign(theta0) * PI / 2
 	
 	p.global_position.x = target.global_position.x + L * cos(theta + PI / 2)
 	p.global_position.y = target.global_position.y + L * sin(theta + PI / 2)
diff --git a/transition_player.gd b/transition_player.gd
index a118b56..56fe756 100644
--- a/transition_player.gd
+++ b/transition_player.gd
@@ -15,7 +15,7 @@ func room_transition(from_door: Door, to_room_path: String, door_name: Variant):
 
 	if from_door:
 		var player: Player = top.get_node("ActiveRoom").find_child("Player")
-		player.set_movement_forced(from_door.enter_towards)
+		player.request_state_forced(from_door.enter_towards)
 
 	# Start animation
 	# The animation calls _change_room at a specific time
@@ -48,7 +48,7 @@ func _on_room_changed():
 	if _transition_door_name:
 		var door: Door = room.find_child(_transition_door_name)
 		player.position = door.position
-		player.set_movement_forced(door.exit_towards)
+		player.request_state_forced(door.exit_towards)
 
 	play("room_trans_end")
 	top.game_save()
@@ -62,4 +62,4 @@ func _transition_end():
 	var room = top.get_node("ActiveRoom")
 	var player: Player = room.find_child("Player")
 	if player:
-		player.set_movement_normal()
+		player.request_state_normal()
-- 
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