32 lines
1.8 KiB
GDScript
32 lines
1.8 KiB
GDScript
extends RefCounted
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## Common steering math for the ship and surface lander.
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static func apply(body: Object, delta: float, turn: float, thrust: bool, brake: bool, strafe: float, boost: bool, was_boosting: bool, allowed_speed: float) -> void:
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if not is_zero_approx(turn):
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body.angular_velocity = move_toward(body.angular_velocity, turn * body.max_turn_speed, body.turn_acceleration * delta)
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else:
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body.angular_velocity = move_toward(body.angular_velocity, 0.0, body.turn_damping * delta)
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body.rotation += body.angular_velocity * delta
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var forward := Vector2.UP.rotated(body.rotation)
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if brake:
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if body.velocity.dot(forward) > 0.0:
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body.velocity = body.velocity.move_toward(Vector2.ZERO, body.brake_acceleration * delta)
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else:
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body.velocity -= forward * body.thrust_acceleration * delta
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var reverse_speed: float = body.velocity.dot(forward)
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if reverse_speed < -body.reverse_max_speed:
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body.velocity += forward * (-body.reverse_max_speed - reverse_speed)
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elif thrust or boost:
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body.velocity += forward * body.thrust_acceleration * (2.0 if boost else 1.0) * delta
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var forward_speed: float = body.velocity.dot(forward)
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if forward_speed > allowed_speed and not was_boosting:
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body.velocity += forward * (allowed_speed - forward_speed)
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var right := Vector2.RIGHT.rotated(body.rotation)
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if not is_zero_approx(strafe):
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body.velocity += right * strafe * body.thrust_acceleration * delta
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var strafe_speed: float = body.velocity.dot(right)
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body.velocity += right * (clampf(strafe_speed, -body.max_strafe_speed, body.max_strafe_speed) - strafe_speed)
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if not was_boosting and not boost and not brake and not thrust and is_zero_approx(strafe):
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body.velocity = body.velocity.move_toward(Vector2.ZERO, body.space_drag * delta)
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if body.velocity.length_squared() > allowed_speed * allowed_speed:
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body.velocity = body.velocity.normalized() * allowed_speed
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