triangulation_display_opengl():
  C++ version
  Compiled on May 11 2025 at 20:30:23.

  This program reads information defining a 3, 4 or 6 node 
  triangulation and displays an image of the triangulation 
  using OpenGL.

  The file has been examined.

  The spatial dimension DIM_NUM =  2
  The number of nodes NODE_NUM =   21

  Minimum: 0  0
  Maximum: 4  4
  Range:   4  4

  The file has been examined.

  The order TRIANGLE_ORDER =             3
  The number of triangles TRIANGLE_NUM = 24

  Minimum node index is 1
  Maximum node index is 21
  Number of nodes is    21

MESH_BASE_ZERO:
  The element indexing appears to be 1-based!
  This will be converted to 0-based.
  Pixels:  500  500

triangulation_display_opengl():
  C++ version
  Compiled on May 11 2025 at 20:30:23.

  This program reads information defining a 3, 4 or 6 node 
  triangulation and displays an image of the triangulation 
  using OpenGL.

  The file has been examined.

  The spatial dimension DIM_NUM =  2
  The number of nodes NODE_NUM =   21

  Minimum: 0  0
  Maximum: 4  4
  Range:   4  4

  The file has been examined.

  The order TRIANGLE_ORDER =             6
  The number of triangles TRIANGLE_NUM = 6

  Minimum node index is 1
  Maximum node index is 21
  Number of nodes is    21

MESH_BASE_ZERO:
  The element indexing appears to be 1-based!
  This will be converted to 0-based.
  Pixels:  500  500