280 lines
8.9 KiB
GDScript
280 lines
8.9 KiB
GDScript
extends KinematicBody2D
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# SIGNALS #
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signal died()
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# CONSTANTS #
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const ArrowProjectile = preload("res://objects/player/arrow_projectile.tscn")
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const DeathSplatter = preload("res://objects/player/player_death_particles.tscn")
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# EXPORTS #
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## horizontal movement speed
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export var walk_speed: float = 50.0
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## climbing speed
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export var climb_speed: float = 39.0
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## gravity force
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export var gravity: float = 720.0
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## SG's terminal velocity
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export var max_fall_speed: float = 255.0
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## upward added by jump
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export var jump_force: float = 150.0
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## proportion of remaining force retained when jump is released
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export var jump_release_force: float = 0.25
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## impulse added when double jumping
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export var double_jump_force: float = 122.0
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# velocity
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var velocity: Vector2 = Vector2.ZERO
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# snap vector
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var snap: Vector2 = Vector2.ZERO
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# ladder currently attached to
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var _attached_ladder: Node2D = null
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# NODE REFERENCES #
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onready var state_chart: StateChart = $StateChart
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onready var animation_player: AnimationPlayer = $AnimationPlayer
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onready var graphics: Node2D = $Graphics
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onready var sprite: Sprite = $"%Sprite"
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onready var arrow_position: Position2D = $"%ArrowPosition"
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onready var dust_particles: CPUParticles2D = $"%DustParticles"
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onready var grounded_shape: CollisionShape2D = $"%GroundedShape"
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onready var airborne_shape: CollisionShape2D = $"%AirborneShape"
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onready var ladder_detector: RayCast2D = $"%LadderDetector"
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onready var death_splatter_position: Position2D = $"%DeathSplatterPosition"
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# OVERRIDES #
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func _ready() -> void:
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Game.respawn_point = global_position
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connect("died", Game, "_on_player_died")
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move_and_slide(Vector2(0.0, 1.0), Vector2.UP)
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state_chart.initialize()
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state_chart.set_guard_property("can_respawn", true)
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$StateDebugLayer/StateChartDebug.target = state_chart
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func _physics_process(delta: float) -> void:
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# update transition guard properties
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# whether player can currently shoot an arrow
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var can_shoot = Game.arrows > 0 and get_tree().get_nodes_in_group("player_arrow").size() == 0
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state_chart.set_guard_property("can_shoot", can_shoot)
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# check for and propagate input events
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if Input.is_action_just_pressed("jump"): # jumping
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state_chart.send_event("jump")
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if Input.is_action_just_pressed("shoot"): # shooting
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state_chart.send_event("shoot")
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# send relevant events
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if is_on_floor(): # check on floor status
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state_chart.send_event("grounded")
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else:
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state_chart.send_event("airborne")
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# check if in contact with ladder
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if ladder_detector.is_colliding():
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state_chart.send_event("ladder_touched")
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# HELPER FUNCTIONS #
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## spawns an arrow
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func spawn_arrow() -> void:
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var arrow = ArrowProjectile.instance()
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arrow.global_position = arrow_position.global_position
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arrow.direction = sign(arrow_position.global_position.x - global_position.x)
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arrow.add_to_group("player_arrow")
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get_parent().add_child(arrow)
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Audio.play_sound(Audio.a_shoot, Audio.ac_jump)
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func die() -> void:
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state_chart.send_event("hurt")
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# STATE ENTERS/EXITS #
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func _on_Grounded_state_entered() -> void:
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# still jump if pressed frame hit ground
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if Input.is_action_just_pressed("jump"):
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print("BOING")
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state_chart.send_event("jump")
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# toggle hurtbox shapes
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grounded_shape.disabled = false
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airborne_shape.disabled = true
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snap.y = 2.5 # snap when in grounded state
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velocity.y = 1.0
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func _on_Airborne_state_entered() -> void:
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grounded_shape.disabled = true
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airborne_shape.disabled = false
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snap.y = 0.0 # do not snap when in air
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velocity.y = 0.0
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func _on_NormalJump_state_entered() -> void:
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velocity.y = -jump_force
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Audio.play_sound(Audio.a_jump, Audio.ac_jump)
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animation_player.play("jump")
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dust_particles.restart()
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func _on_NormalJump_state_exited() -> void:
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# add bit of force proportional to how much of the jump is left
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if Input.is_action_just_released("jump"):
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var factor = inverse_lerp(0.0, -jump_force, velocity.y)
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velocity.y = -jump_force * factor * jump_release_force
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func _on_LadderJump_state_entered() -> void:
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velocity.y = -jump_force
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Audio.play_sound(Audio.a_jump, Audio.ac_jump)
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animation_player.play("jump")
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func _on_DoubleJump_state_entered() -> void:
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velocity.y = -double_jump_force
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Audio.play_sound(Audio.a_doublejump, Audio.ac_jump)
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animation_player.play("double_jump")
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func _on_CoyoteFalling_state_entered() -> void:
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velocity.x = 0.0
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animation_player.play("fall")
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func _on_NormalFalling_state_entered() -> void:
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animation_player.play("fall")
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func _on_ScaredFalling_state_entered() -> void:
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velocity.x = 0.0
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animation_player.play("fall_scared")
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func _on_Shooting_state_entered() -> void:
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velocity.x = 0.0
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animation_player.play("shoot_grounded")
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func _on_AirShooting_state_entered() -> void:
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spawn_arrow()
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animation_player.play("shoot_airborne")
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func _on_Climbing_state_entered() -> void:
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if ladder_detector.get_collider().is_in_group("ladder"):
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_attached_ladder = ladder_detector.get_collider()
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velocity = Vector2.ZERO
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snap = Vector2.ZERO
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if global_position.x < _attached_ladder.middle:
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global_position.x = _attached_ladder.left_snap
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graphics.scale.x = 1.0
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else:
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global_position.x = _attached_ladder.right_snap
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graphics.scale.x = -1.0
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animation_player.play("climb")
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func _on_Climbing_state_exited() -> void:
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_attached_ladder = null
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animation_player.playback_speed = 1.0 # restore playback speed
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Audio.ac_climb.stream = null # stop audio
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# all the stuff that happens when they DIE
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func _on_Dead_state_entered() -> void:
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# send signals
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emit_signal("died")
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state_chart.send_event("died")
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# spawn death particles
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var particles = DeathSplatter.instance()
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particles.global_position = death_splatter_position.global_position
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particles.emitting = true
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get_parent().add_child(particles)
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# fade into the ether
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graphics.visible = false
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state_chart.send_event("respawn")
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func _on_Respawn_state_entered() -> void:
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global_position = Game.respawn_point
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graphics.visible = true
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state_chart.call_deferred("send_event", "get_real")
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# STATE PROCESSING #
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## when on ground
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func _process_grounded(delta: float) -> void:
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# make sure is_on_floor detected still
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velocity.y = 1.0
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## called when player can move left and rightpass # Repass # Rpass # Replace with function body.eplace with function body.place with function body.
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func _process_horizontal_movement(delta: float) -> void:
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var input_dir = sign(Input.get_axis("ui_left", "ui_right")) # sign() to normalize
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velocity.x = input_dir * walk_speed
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if input_dir != 0.0:
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graphics.scale.x = input_dir
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## walk/idle state
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func _process_can_walk(delta: float) -> void:
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if sign(Input.get_axis("ui_left", "ui_right")) != 0.0:
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animation_player.play("walk")
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else:
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animation_player.play("idle")
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## climbing on ladders
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func _process_climbing(delta: float) -> void:
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# climbing movement
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var input_dir = sign(Input.get_axis("ui_up", "ui_down"))
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velocity.y = input_dir * climb_speed # move in input direction
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animation_player.playback_speed = abs(input_dir) # play/pause animation
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# play sound
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if input_dir < 0.0:
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if Audio.ac_climb.stream != Audio.a_climb_up:
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Audio.play_sound(Audio.a_climb_up, Audio.ac_climb)
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if Audio.ac_climb.get_playback_position() >= Audio.a_climb_up.get_length():
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Audio.ac_climb.play()
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elif input_dir > 0.0:
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if Audio.ac_climb.stream != Audio.a_climb_down:
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Audio.play_sound(Audio.a_climb_down, Audio.ac_climb)
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if Audio.ac_climb.get_playback_position() >= Audio.a_climb_down.get_length():
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Audio.ac_climb.play()
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else:
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Audio.ac_climb.stream = null
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# # switching sides of ladder
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# if global_position.x < _attached_ladder.middle and Input.is_action_just_pressed("ui_right"):
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# global_position.x = _attached_ladder.right_snap
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# graphics.scale.x = -1SimCity.0SimCitySimCity
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# elif Input.is_action_just_pressed("ui_left"):
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# global_position.x = _attached_ladder.left_snap
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# graphics.scale.x = 1.0
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if Input.is_action_just_pressed("jump"):
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global_position.x -= graphics.scale.x * 3.0
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state_chart.send_event("jump")
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if Input.is_action_just_pressed("shoot"):
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global_position.x -= graphics.scale.x * 3.0
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state_chart.send_event("ladder_detach")
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# check if still on ladder
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if ladder_detector.get_collider() != _attached_ladder:
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if input_dir == -1.0:
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state_chart.send_event("jump")
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else:
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state_chart.send_event("ladder_detach")
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func _process_jump(delta: float) -> void:
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if velocity.y >= 0.0:
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state_chart.send_event("jump_peak")
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if not Input.is_action_pressed("jump"):
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state_chart.send_event("jump_released")
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## called by states SG will fall during
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func _process_gravity(delta: float) -> void:
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velocity.y = min(velocity.y + gravity * delta, max_fall_speed)
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## called after all other physics things
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func _process_movement(delta: float) -> void:
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# apply velocity and react to collisions
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velocity = move_and_slide_with_snap(velocity, snap, Vector2.UP)
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# deal with that STUPID landing exactly on corner bug
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var col = get_last_slide_collision()
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if col != null:
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if col.remainder.y >= 1.0 and col.normal.y == 0.0:
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position.x += col.normal.x * 0.001
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# COLLISION CALLBACKS #
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func _on_Hitbox_body_entered(body: Node) -> void:
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if body.is_in_group("death"):
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die()
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