57 lines
1.9 KiB
GDScript
57 lines
1.9 KiB
GDScript
class_name VaultCamera
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extends Camera2D
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## Камера убежища: перетаскивание, зум колесом и клавиатурная прокрутка.
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##
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## Границы задаются встроенными limit_* по размеру убежища, поэтому вручную
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## позицию не зажимаем — движок делает это сам.
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const ZOOM_STEP := 1.12
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const MIN_ZOOM := 0.45
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const MAX_ZOOM := 2.2
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const KEY_PAN_SPEED := 900.0
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const EDGE_MARGIN := 420.0
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var _dragging := false
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func _ready() -> void:
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var bounds := VaultGrid.bounds()
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limit_left = int(bounds.position.x - EDGE_MARGIN)
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limit_right = int(bounds.end.x + EDGE_MARGIN)
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limit_top = int(bounds.position.y - EDGE_MARGIN)
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limit_bottom = int(bounds.end.y + EDGE_MARGIN)
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position = bounds.get_center()
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func _process(delta: float) -> void:
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var direction := Input.get_vector("move_left", "move_right", "move_up", "move_down")
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if direction != Vector2.ZERO:
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position += direction * KEY_PAN_SPEED * delta / zoom.x
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func _unhandled_input(event: InputEvent) -> void:
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if event is InputEventMouseButton:
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_handle_mouse_button(event as InputEventMouseButton)
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elif event is InputEventMouseMotion and _dragging:
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position -= (event as InputEventMouseMotion).relative / zoom
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get_viewport().set_input_as_handled()
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func _handle_mouse_button(event: InputEventMouseButton) -> void:
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match event.button_index:
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MOUSE_BUTTON_WHEEL_UP:
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_zoom_by(ZOOM_STEP)
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get_viewport().set_input_as_handled()
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MOUSE_BUTTON_WHEEL_DOWN:
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_zoom_by(1.0 / ZOOM_STEP)
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get_viewport().set_input_as_handled()
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MOUSE_BUTTON_RIGHT, MOUSE_BUTTON_MIDDLE:
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# Правая и средняя кнопки таскают вид; левая остаётся строительству.
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_dragging = event.pressed
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get_viewport().set_input_as_handled()
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func _zoom_by(factor: float) -> void:
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var target := clampf(zoom.x * factor, MIN_ZOOM, MAX_ZOOM)
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zoom = Vector2(target, target)
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