Fig. 2
From: Review of heterogeneous material objects modeling in additive manufacturing
a Object voxelized along the slicing direction based on three different resolutions [31]; A voxel-based method of constructing and skinning functionally graded lattice structures suitable for AM [32]: pixel image of a circle with a low resolution (b); voxel model of a sphere with a low resolution (c); a domain with functionally grading gradients (d); functionally graded structures generated from input gradients (e). f The conceptual design framework for 4D printing [33]