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Select by rectangle

description

  • support hit testing by a rectangle (implement a Viewport3DHelper.FindHits overload)
    • support both "touching" and "completely inside" rectangle
  • create an mouse command that shows a rectangle annotation, updates it when dragging and calls a delegate when completed (e.g. a DragRectangleCommand(Viewport3D, CompletedDelegate))
  • create an example that does selection of some simple Visual3Ds by rectangle. The DragRectangleCommand can be bound a the left-click mouse bindings and added to the input bindings.

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