62 lines
1.7 KiB
GDScript
62 lines
1.7 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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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 init_set = [
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initial_touches[0],
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initial_touches[1],
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(initial_touches[1] - initial_touches[0]).tangent() + initial_touches[1],
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(initial_touches[1] - initial_touches[0]).tangent() + initial_touches[0],
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]
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var curr_set = [
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current_touches[0],
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current_touches[1],
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(current_touches[1] - current_touches[0]).tangent() + current_touches[1],
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(current_touches[1] - current_touches[0]).tangent() + current_touches[0],
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]
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var basis = SummerDayMathHelper.basis_from_to_points(
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init_set[0], init_set[1], init_set[2], init_set[3],
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curr_set[0], curr_set[1], curr_set[2], curr_set[3]
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)
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var transform = Transform2D(
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Vector2(basis.x.x, basis.x.y),
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Vector2(basis.y.x, basis.y.y),
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Vector2(basis.z.x, basis.z.y)
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) * initial_transform
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tool_context.canvas_state.canvas_transform = transform
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