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Inventor API 中的零件图、部件图和工程图
•从 UI 来看，很多特征对象的创建都需要草图作为输入来定义特征的形状或者位置，这些特征如 Extrude, Revolve, Hole, Rib, Loft, Sweep, Coil, Split, Emboss, and Boundary Patch.
•用 API 来创建特征，也象通过界面创建特征一样，需要用草图作为参数，如：
• AddByDistanceExtent(
–Profile As Profile,
–Distance as variant,
–ExtentDirection As PartFeatureExtentDirectionEnum,
–Operation As PartFeatureOperationEnum,
–[TaperAngle])
§ As ExtrudeFeature
基于草图的特征 (Features)