RayCaster Tutorial angefangen

project.godot

@@ -13,9 +13,15 @@ _global_script_classes=[ {
 "class": "Actor",
 "language": "GDScript",
 "path": "res://src/Actor/Actor.gd"
+}, {
+"base": "Node",
+"class": "StateMachine",
+"language": "GDScript",
+"path": "res://src/StateMachines/StateMachine.gd"
 } ]
 _global_script_class_icons={
-"Actor": ""
+"Actor": "",
+"StateMachine": ""
 }
 
 [application]

src/Actor/Blobby.gd

@@ -2,24 +2,38 @@ extends Actor
 
 export var stomp_impulse: = 1000.0
 
+
 func _on_EnemyDetector_area_entered(area: Area2D) -> void:
-		_velocity = calculate_stomp_velocity(_velocity, stomp_impulse)
+	_velocity = calculate_stomp_velocity(_velocity, stomp_impulse)
+
 
 func _on_EnemyDetector_body_entered(body: Node) -> void:
 	die()
 
+
 func _physics_process(delta: float) -> void:
 	var is_jump_interrupted: = Input.is_action_just_released("jump") and _velocity.y < 0.0
 	var direction: = get_direction()
 	_velocity = calculate_move_velocity(_velocity, speed, direction, is_jump_interrupted)
 	_velocity = move_and_slide(_velocity, FLOOR_NORMAL)
 
+
 func get_direction() -> Vector2:
 	return Vector2(
 		Input.get_action_strength("move_right")	- Input.get_action_strength("move_left"),
 		-1.0 if Input.is_action_just_pressed("jump") and is_on_floor() else 1.0
 	)
 
+
+func handle_move_input():
+	return null
+
+
+func apply_gravity(delta, velocity:Vector2):
+	velocity.y += gravity * delta
+	return velocity
+
+
 func calculate_move_velocity(
 		linear_velocity: Vector2,
 		speed: Vector2,
@@ -28,13 +42,14 @@ func calculate_move_velocity(
 	) -> Vector2:
 	var out: = linear_velocity
 	out.x = speed.x * direction.x
-	out.y += 	gravity * get_physics_process_delta_time()
+	out = apply_gravity(get_physics_process_delta_time(), out)
 	if direction.y == -1:
 		out.y = speed.y * direction.y
 	if is_jump_interrupted:
 		out.y = 0
 	return out
 
+
 func calculate_stomp_velocity(linear_velocity: Vector2, impulse: float) -> Vector2:
 	var out: = linear_velocity
 	out.y = -impulse

src/Actor/PlayerStateMachine.gd

@@ -0,0 +1,22 @@
+extends StateMachine
+
+func _ready():
+    add_state("idle")
+    add_state("run")
+    add_state("jump")
+    add_state("fall")
+    call_deferred("set_state", states.idle)
+
+func _state_logic(delta):
+    parent.handle_move_input()
+    parent.apply_gravity(delta)
+    parent.apply_movement()
+
+func _get_transition(delta):
+    return null
+
+func _enter_state(new_state, old_state):
+    pass
+
+func _exit_state(old_state, new_state):
+    pass

src/RayCaster.gd

@@ -0,0 +1,57 @@
+extends Node2D 
+
+const UP = Vector2(0, -1)
+const DOWN = Vector2(0, 1)
+const LEFT = Vector2(-1, 0)
+const RIGHT = Vector2(1, 0)
+const SKIN_WIDTH = 1
+
+export (int) var buffer_size = 3 setget _set_buffer_size
+var buffer = []
+
+func _raycast(direction, rect, mask, exceptions = [], ray_length = 16, buffer = self.buffer):
+	if !(direction == UP || direction == DOWN || direction == LEFT || direction == RIGHT):
+		return 0
+
+	var space_state = get_world_2d().direct_space_state
+	var extents = rect.extents - Vector2(SKIN_WIDTH, SKIN_WIDTH)
+	var count = 0
+	var ray_count = buffer.size()
+	var cast_to = (ray_length + SKIN_WIDTH) * direction
+	var origin
+	var spacing
+
+	if direction == UP || direction == DOWN:
+		spacing = extents.x * 2 / (ray_count - 1)
+	else:
+		spacing = extents.y * 2 / (ray_count - 1)
+
+	for i in range(ray_count):
+		if direction == UP || direction == DOWN:
+			origin = Vector2(-extents.x + spacing * i, extents.y)
+			if direction == UP:
+				origin.y = -origin.y
+		else:
+			origin = Vector2(extents.x, -extents.y + spacing * i)
+			if direction == UP:
+				origin.x = -origin.x
+
+		var result = space_state.intersect_ray(global_position + origin, global_position + origin + cast_to,
+												exceptions, mask)
+		if result:
+			buffer[count] = result
+			count += 1
+	return {buffer = buffer, count = count}
+			
+
+
+
+
+func _set_buffer_size(value):
+	buffer_size = max(value, 2)
+	buffer.resize(buffer_size)
+
+# Called when the node enters the scene tree for the first time.
+func _ready():
+	_set_buffer_size(buffer_size)
+