From b862fa80840c33c80a66d609082ee01a83ec3320 Mon Sep 17 00:00:00 2001
From: Gabriel Kaszewski <gabrielkaszewski@gmail.com>
Date: Wed, 25 Dec 2024 17:38:19 +0100
Subject: [PATCH] add coyote timer

---
 objects/brick_player.tscn |  2 ++
 scripts/player.gd         | 25 ++++++++++++++++++++++++-
 2 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/objects/brick_player.tscn b/objects/brick_player.tscn
index 7abc589..1464af6 100644
--- a/objects/brick_player.tscn
+++ b/objects/brick_player.tscn
@@ -36,3 +36,5 @@ script = ExtResource("5_geu10")
 eye_left = NodePath("../Root/Left Eye")
 eye_right = NodePath("../Root/Right Eye")
 player_controller = NodePath("..")
+
+[node name="CoyoteTimer" type="Timer" parent="."]
diff --git a/scripts/player.gd b/scripts/player.gd
index 404df24..e153998 100644
--- a/scripts/player.gd
+++ b/scripts/player.gd
@@ -6,15 +6,24 @@ extends CharacterBody2D
 var gravity = ProjectSettings.get_setting("physics/2d/default_gravity")
 
 @onready var root = $Root
+@onready var coyote_timer: Timer = $CoyoteTimer
 
 @export var jump_height: float = 100
 @export var jump_time_to_peak: float = 0.5
 @export var jump_time_to_descent: float = 0.4
 
+@export var coyote_frames: int = 6
+@export var coyote_mode: bool = false
+@export var was_last_floor: bool = false
+
 @onready var jump_velocity: float = ((2.0 * jump_height) / jump_time_to_peak) * -1.0
 @onready var jump_gravity: float = ((-2.0 * jump_height) / (jump_time_to_peak * jump_time_to_peak)) * -1.0
 @onready var fall_gravity: float = ((-2.0 * jump_height) / (jump_time_to_descent * jump_time_to_descent)) * -1.0
 
+func _ready() -> void:
+	coyote_timer.timeout.connect(on_coyote_timer_timeout)
+	coyote_timer.wait_time = coyote_frames / 60.0
+
 func _process(_delta):
 	if velocity.x > 0.0:
 		root.rotation = deg_to_rad(-10)
@@ -24,10 +33,20 @@ func _process(_delta):
 		root.rotation = 0
 		
 func _physics_process(delta):
+	if is_on_floor():
+		was_last_floor = true
+		coyote_mode = false  # Reset coyote mode when back on the floor
+		coyote_timer.stop()  # Stop timer when grounded
+	else:
+		if was_last_floor:  # Start coyote timer only once
+			coyote_mode = true
+			coyote_timer.start()
+		was_last_floor = false
+	
 	if not is_on_floor():
 		velocity.y += calculate_gravity() * delta
 
-	if Input.is_action_pressed("jump") and is_on_floor():
+	if Input.is_action_pressed("jump") and (is_on_floor() or coyote_mode):
 		jump()
 		
 	var direction = Input.get_axis("left", "right")
@@ -40,6 +59,10 @@ func _physics_process(delta):
 	
 func jump():
 	velocity.y = jump_velocity
+	coyote_mode = false
 	
 func calculate_gravity() -> float:
 	return jump_gravity if velocity.y < 0.0 else fall_gravity
+
+func on_coyote_timer_timeout():
+	coyote_mode = false