3 Dhp Code
In this chapter, we present an outline of the structure of the code. We begin by listing the main packages constituting the code. Data structure arrays are discussed next. In Section 4.3, we present the 3D version of the fundamental data structure algorithms discussed for 2D meshes in the first volume: natural order of elements, finding neighbors for a mid-face or mid-edge node, and determining element nodal connectivities.