87 lines
2 KiB
GDScript
87 lines
2 KiB
GDScript
class_name CameraGimbal extends Node3D
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@export var rotation_speed = (PI / 180) * 120
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@export var default_zoom = 8
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# is mouse captured by game permanently?
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# (i.e. not just holding right click)
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var locked = false
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var mouse_velocity = Vector2.ZERO
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var current_zoom = default_zoom
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var zoom_min = 4
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var zoom_max = 80
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var zoom_speed = 20
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func _lock():
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Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
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func _unlock():
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Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
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mouse_velocity = Vector2.ZERO
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func lock():
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_lock()
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locked = true
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# optional API function for nodes that want
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# to unlock the mouse for a period of time
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func unlock():
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_unlock()
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locked = false
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func reset():
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basis = Basis()
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$InnerGimbal.basis = Basis()
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current_zoom = default_zoom
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# y is before x because the outer gimbal is
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# in charge of rotating the y axis
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func rotate_camera(delta):
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var y = 0
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var x = 0
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if mouse_velocity.x > 5 or mouse_velocity.x < -5:
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y -= clamp(mouse_velocity.x / 12.5, -10, 10)
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if mouse_velocity.y > 5 or mouse_velocity.y < -5:
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x -= clamp(mouse_velocity.y / 12.5, -10, 10)
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rotate_object_local(Vector3.UP, y * rotation_speed * delta)
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$InnerGimbal.rotate_object_local(
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Vector3.RIGHT, x * rotation_speed * delta)
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$InnerGimbal.rotation.x = clamp($InnerGimbal.rotation.x, -0.8, 0.7)
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func _input(event):
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if event is InputEventMouseMotion:
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mouse_velocity = event.relative
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elif event.is_action_pressed("cam_zoom_out"):
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current_zoom += 1
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elif event.is_action_pressed("cam_zoom_in"):
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current_zoom -= 1
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current_zoom = clamp(current_zoom, zoom_min, zoom_max)
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func _process(delta):
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# rotate camera
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if locked:
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rotate_camera(delta)
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else:
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if Input.is_mouse_button_pressed(MOUSE_BUTTON_RIGHT):
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_lock()
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rotate_camera(delta)
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else:
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_unlock()
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# zoom in/out
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var pos = Vector3($InnerGimbal/Camera3D.position)
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pos.y = lerp(pos.y, float(current_zoom), zoom_speed * delta)
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pos.z = lerp(pos.z, float(current_zoom), zoom_speed * delta)
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$InnerGimbal/Camera3D.position = pos
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# reset camera
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if Input.is_action_pressed("cam_reset"):
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reset()
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func _ready():
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lock()
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