42 lines
1.2 KiB
GDScript3
42 lines
1.2 KiB
GDScript3
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extends Camera2D
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const MAX_ZOOM_LEVEL = 0.5
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const MIN_ZOOM_LEVEL = 2.5
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const ZOOM_INCREMENT = 0.5
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signal moved()
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signal zoomed()
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var _current_zoom_level = 1.5
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var _drag = false
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func _input(event):
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if event.is_action_pressed("cam_drag"):
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_drag = true
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elif event.is_action_released("cam_drag"):
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_drag = false
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elif event.is_action("cam_zoom_in"):
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_update_zoom(-ZOOM_INCREMENT, get_local_mouse_position())
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elif event.is_action("cam_zoom_out"):
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_update_zoom(ZOOM_INCREMENT, get_local_mouse_position())
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elif event is InputEventMouseMotion && _drag:
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set_offset(get_offset() - event.relative*_current_zoom_level)
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emit_signal("moved")
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func _update_zoom(incr, zoom_anchor):
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var old_zoom = _current_zoom_level
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_current_zoom_level += incr
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if _current_zoom_level < MAX_ZOOM_LEVEL:
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_current_zoom_level = MAX_ZOOM_LEVEL
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elif _current_zoom_level > MIN_ZOOM_LEVEL:
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_current_zoom_level = MIN_ZOOM_LEVEL
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if old_zoom == _current_zoom_level:
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return
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var zoom_center = zoom_anchor - get_offset()
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var ratio = 1-_current_zoom_level/old_zoom
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set_offset(get_offset() + zoom_center*ratio)
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set_zoom(Vector2(_current_zoom_level, _current_zoom_level))
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emit_signal("zoomed")
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