A TSweep3D is instantiated from a contour and a trajectory. The contour is a 2-D curve geometry that defines the shape of the sweep. The trajectory is a 3-D curve geometry that defines the path of the sweep. The trajectory can be in 2-D or 3-D space because a TGCurve3D accepts a TGCurve in its constructor. This lets you can use sweeps to create swept surfaces of all shapes. Figure 173 shows the TSweep3D architecture.
TSweep3D has two constructors. One constructor takes a single contour curve and the other constructor takes a list of contour curves as input.
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