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bezier_curve->set_point
bezier_curve ->set_point: point=point, x=[int], y=[int]
Move (member) point to (X, Y). Depending on the point, this modifies bezier_curve<-start, bezier_curve<-control1, bezier_curve<-control2 or bezier_curve<-end and bezier_curve->compute’s the curve afterwards,

It is normally used with the result if bezier_curve<-point to allow interactive editing of bezier curves. See also the PceDraw demo application.

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