Fig. 1
From: pSpatiocyte: a high-performance simulator for intracellular reaction-diffusion systems
HCP lattice arrangement and a coordinate system for accessing voxels. a A schematic view of HCP lattice. Left: odd and even planes, shown in different colors. Right: the twelve nearest neighbors (green) of a voxel (yellow). b 2D slice of an HCP coordinate system based on a unit cell. A compartment mapped along the axes i and j makes a rhomboid instead of a rectangle. A tilted third axis, k (not shown) further contorts the boundaries of the compartment. c Top row: accessing neighbor voxels in a twisted Cartesian coordinate system for the odd plane in k-axis. Bottom row: another stencil is used for the even plane