Node table: coords stride ndm (x, y[, z]); fixed one bitmask byte per node (bit k = DOF k: ux, uy, rz in 2D; ux, uy, uz, rx, ry, rz in 3D); mass is sparse, addressed via a parallel node-index array since most nodes carry none.
coords
ndm
fixed
k
Stride ndf (3 in 2D, 6 in 3D), parallel to mass_node_index.
ndf
mass_node_index
Node table:
coordsstridendm(x, y[, z]);fixedone bitmask byte per node (bitk= DOFk: ux, uy, rz in 2D; ux, uy, uz, rx, ry, rz in 3D); mass is sparse, addressed via a parallel node-index array since most nodes carry none.