104 lines
2.8 KiB
GDScript
104 lines
2.8 KiB
GDScript
extends KinematicBody2D
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export (String, "player_1", "player_2", "player_3", "player_4") var player_number: String = "player_1"
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export var thrust_power: float
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export var max_speed: float
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export var brake_power: float
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export var velocity_damp: float
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export var turning_power: float
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export var max_turning: float
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export var turning_damp: float
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export var bounce_damp: float
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export var max_health: float
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export var max_energy: float
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export var energy_regen: float
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onready var health: float = max_health
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onready var energy: float = max_energy
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var heading: float = 0
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var turning: float = 0
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var velocity: Vector2 = Vector2(0, 0)
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var using_energy: bool = false
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func _physics_process(delta):
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# Turning
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apply_turning(delta)
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rotation = stepify(heading, 2*PI/16)
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var tp = false
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if Input.is_action_pressed(player_number + "_up"):
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tp = apply_thrust(delta)
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$Graphics/ThrustParticles.emitting = tp
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# Brakes
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var bp = false
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if Input.is_action_pressed(player_number + "_down"):
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bp = apply_brake(delta)
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$Graphics/BrakeParticles.emitting = bp
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# Damping n' Clamping
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if !tp:
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velocity *= pow(velocity_damp, delta)
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velocity = velocity.clamped(max_speed)
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# Move and process collisions
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var coll = move_and_collide(velocity * delta)
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if coll:
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velocity = velocity.bounce(coll.normal) * bounce_damp
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if coll.collider.has_method("impact"):
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coll.collider.impact(coll.normal*-velocity.length())
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# Regenerate energy
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if !using_energy:
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energy = min(energy + energy_regen * delta, max_energy)
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using_energy = false
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func _input(event):
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if event.is_action_pressed(player_number + "_primary"):
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$PrimaryAction.activate()
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if event.is_action_released(player_number + "_primary"):
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$PrimaryAction.deactivate()
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if event.is_action_pressed(player_number + "_secondary"):
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$SecondaryAction.activate()
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if event.is_action_released(player_number + "_secondary"):
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$SecondaryAction.deactivate()
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func apply_turning(delta: float):
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var new_turn_force = false
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if Input.is_action_pressed(player_number + "_left"):
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turning -= turning_power * delta
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new_turn_force = true
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if Input.is_action_pressed(player_number + "_right"):
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turning += turning_power * delta
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new_turn_force = true
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if !new_turn_force:
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turning *= pow(turning_damp, delta)
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turning = clamp(turning, -max_turning, max_turning)
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heading += turning * delta
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func apply_thrust(delta: float) -> bool:
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# Direction vector and relative velocity
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var direction = Vector2(0, -1).rotated(heading)
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velocity += direction * thrust_power * delta
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return true
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func apply_brake(delta: float) -> bool:
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velocity *= pow(1/brake_power, delta)
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return true
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func impact(force: Vector2):
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velocity += force
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func set_energy(new_energy) -> bool:
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if new_energy < energy:
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using_energy = true
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energy = clamp(new_energy, 0, max_energy)
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return !(energy == 0)
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