55 lines
1.6 KiB
GDScript
55 lines
1.6 KiB
GDScript
extends Resource
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class_name SummerDayCanvasState
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signal fill_transform_changed(fill_transform)
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signal canvas_transform_changed(canvas_transform)
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signal view_transform_changed(view_transform)
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var rect_size: Vector2
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var fill_transform := Transform2D.IDENTITY
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var canvas_transform := Transform2D.IDENTITY setget _set_canvas_transform
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var view_transform := Transform2D.IDENTITY # fill_transform * canvas_transform
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func _init():
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connect("fill_transform_changed", self, "_update_view_transformation")
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connect("canvas_transform_changed", self, "_update_view_transformation")
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func update_fill_transform(scene):
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if scene == null:
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fill_transform = Transform2D.IDENTITY
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else:
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var aspect_ratio = scene.aspect_ratio.x / scene.aspect_ratio.y
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var size_ratio = rect_size.x / rect_size.y
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var scale
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var translation = Vector2.ZERO
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if aspect_ratio <= size_ratio:
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scale = rect_size.y
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translation.x = rect_size.x * 0.5 - aspect_ratio * scale * 0.5
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else:
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scale = rect_size.x / aspect_ratio
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translation.y = rect_size.y * 0.5 - scale * 0.5
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fill_transform = Transform2D.IDENTITY.scaled(Vector2(scale, scale))
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fill_transform = fill_transform.translated(translation)
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fill_transform = Transform2D(
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Vector2(scale, 0.0),
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Vector2(0.0, scale),
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translation
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)
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emit_signal("fill_transform_changed", fill_transform)
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func _update_view_transformation(transform):
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view_transform = canvas_transform * fill_transform
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emit_signal("view_transform_changed", view_transform)
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func _set_canvas_transform(new_canvas_transform):
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canvas_transform = new_canvas_transform
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emit_signal("canvas_transform_changed", canvas_transform)
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