CFD Utilities Files

Program extract_blocks_2d Description:

   This is a 2D analogue of EXTRACT_BLOCKS.

      EXTRACT_BLOCKS_2D extracts a list of blocks from a multiblock grid and
   an optional "q" file (or rather a PLOT3D-type function file).

      This version can handle "iblanked" files at the cost of another prompt.

Control file:

      This is dispensed with.  At the prompt, enter a list of desired blocks
   in ascending order, on a single line.  E.g.:

      1 3 7 : : 15

Procedures:

      RDLIST          Read an indefinite list of integers
      XYQ_IO package  I/O utilities for PLOT3D grid and function files

History:

      04/06/04  D.A.Saunders  EXTRACT_BLOCKS adaptation of GRID_FACES.
      09/14/18    "      "    EXTRACT_BLOCKS_2D variant for the case of
                              extracting the forebody block 1 from the
                              2-block output from COMPRESS2D.  Including an
                              aft body in the CAPSULE_GRID step and its
                              hyperbolic volume grid step is a workaround
                              for the splay problem encountered with Gridgen
                              on forebody-only cases.

Author:  David Saunders, ELORET Corporation/NASA Ames Research Center, CA
         Later with AMA, Inc. at NASA ARC.