So by hand signs, drawing on a paper and having a crowd gather around the driver and me, I finally persuaded the driver to drive with me showing him.

我跟司机又是打手势又是画图，身边还围了一群人，最后终于说服司机让我在他开车的时候给他指路。

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Use a scrap of paper to keep your hand from smudging up your drawing if necessary.

必要的时候找张纸垫着画以免弄污画面。

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This paper studied on free curved surface reconstruction of hand-drawing with reverse technology and "point-surface" CAD model reconstruction.

采用逆向技术路线，通过“点-面”的CAD模型重构过程对不能或不便用CAD功能来表达的手绘图案自由曲面重构进行了研究。

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