This review investigates the recent developments of heterogeneous objects modeling in additive manufacturing (AM), as well as general problems and widespread solutions to the modeling methods of heterogeneous objects. Prevalent heterogeneous object representations are generally categorized based on the different expression or data structure employed therein, and the state-of-the-art of process planning procedures for AM is reviewed via different vigorous solutions for part orientation, slicing methods, and path planning strategies. Finally, some evident problems and possible future directions of investigation are discussed.

中文翻译：

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回顾增材制造中的异质材料对象建模。

本文回顾了增材制造（AM）中异构对象建模的最新发展，以及异构对象建模方法的一般问题和广泛解决方案。普遍的异类对象表示通常根据其中使用的不同表达或数据结构进行分类，并且通过针对零件方向，切片方法和路径规划策略的不同有力解决方案来审查AM的最新工艺规划过程。 。最后，讨论了一些明显的问题和可能的未来研究方向。