62 lines
1.8 KiB
GDScript
62 lines
1.8 KiB
GDScript
extends SummerDayTool
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class_name SummerDayFreeTransformCanvasTool
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var touch_dict = {}
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var initial_touches
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var current_touches
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var initial_transform: Transform2D
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func _init():
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priority = 1
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func _check_for_use(event: InputEvent, tool_context: SummerDayToolContext):
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if event is InputEventScreenTouch:
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if event.pressed:
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touch_dict[event.index] = event.position
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else:
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touch_dict.erase(event.index)
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if touch_dict.size() == 2:
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initial_transform = tool_context.canvas_state.canvas_transform
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var keys = touch_dict.keys()
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initial_touches = [touch_dict[keys[0]], touch_dict[keys[1]]]
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print(touch_dict)
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if event is InputEventScreenDrag:
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touch_dict[event.index] = event.position
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if touch_dict.size() == 2:
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var keys = touch_dict.keys()
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current_touches = [touch_dict[keys[0]], touch_dict[keys[1]]]
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return true
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return false
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func _run(event: InputEvent, tool_context: SummerDayToolContext):
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var jump := Transform2D.IDENTITY
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# Calculate scale.
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var initial_distance = initial_touches[0].distance_to(initial_touches[1])
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var current_distance = current_touches[0].distance_to(current_touches[1])
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var scale = current_distance / initial_distance
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# Calculate rotation.
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var initial_angle = initial_touches[0].angle_to_point(initial_touches[1])
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var current_angle = current_touches[0].angle_to_point(current_touches[1])
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var rotation = current_angle - initial_angle
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jump = jump.scaled(Vector2(scale, scale)).rotated(rotation)
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# Calculate origin.
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var transformed_initial_touch = jump.basis_xform(initial_touches[0])
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var offset = current_touches[0] - transformed_initial_touch
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print(jump)
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jump = Transform2D(Vector2.RIGHT, Vector2.DOWN, offset) * jump
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print(jump)
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var transform = jump * initial_transform
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tool_context.canvas_state.canvas_transform = transform
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