Additive manufacturing has recently enabled the creation of heterogeneous objects in which different materials can be specified at different locations. This creates new exciting perspectives in additive crafting but also presents several challenges, including the problem of specifying rules for varying materials at particular locations as well as encoding user specified properties (such as stress tensors) inside a volumetric model. The aim of this work is to provide an answer to these problems, with the definition of local feature preserving blending schemes that allow both the encodement and the blend of property fields over volumetric representation (V-reps) models, while preserving the original values of such properties where possible. A distance-based blending scheme satisfying this characteristic is described both theoretically and practically, with examples of both homogeneous and heterogeneous primitives in V-rep models.

增材制造最近使创建异类对象成为可能，其中可以在不同位置指定不同的材料。这在增材制造中创造了令人兴奋的新观点，但同时也带来了一些挑战，包括为特定位置的不同材料指定规则以及在体积模型内对用户指定的属性（例如应力张量）进行编码的问题。这项工作的目的是为这些问题提供答案，并保留局部特征混合方案允许在体积表示（V-reps）模型上对属性字段进行编码和混合，同时在可能的情况下保留此类属性的原始值。在理论上和实践上都描述了满足此特性的基于距离的混合方案，并以V-rep模型中的同质和异质图元为例。