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Lecture 34 Formats, reading 

Recent update.

There are many file formats that may be of interest.
Collected here are a tiny fraction of what is available.
Search the web for code to read and convert formats.
Adapt existing code to the language of your choice.


AVS UCD data

AVS UCD data format


UCD cyl1.inp demonstrating boundary conditions

This file defines a rectangular duct with a cylinder inside.
The Dirichlet and Neumann boundary conditions are specified
as well as the geometry.

cyl1.inp boundary definition 
plot_ucd.c  for plotting 3D UCD boundary 




Extending UCD data to 4 dimensions

Without changing the basic UCD format,
the 4th coordinate can be provided along with
Dirichlet and Neumann boundary conditions.

pde_ucd4.inp  4D geometry 


Source code to read UCD format


read_ucd.h  C++ header 
read_ucd.cc  C++ code 
test_read_ucd.cc  C++ test 
ucd1.inp  test input data 
ucd1.out  test output results 
ucd2.inp  test input data 
ucd2.out  test output results 

Ada Language implementation, including use in a PDE
pde_read_ucd.ads  Ada package spec 
pde_read_ucd.adb  Ada package body 
test_pde_read_ucd.adb  test 
test_pde_read_abc_ucd_ada.out  test results 

pde_process_ucd.ads  Ada package spec 
pde_process_ucd.adb  Ada package body 
test_pde_process_ucd.adb  test 
test_pde_process_abc_ucd_ada.out  test results 

make_abc_ucd.adb  make abc_ucd.inp 
abc_ucd.inp  UCD file 
abc_ucd.ads  PDE definition spec 
abc_ucd.adb  PDE definition body 
pde_abc_eq_ucd.adb  PDE solver 
pde_abc_eq_ucd_ada.out  solution 





UCD file with color, mechanical properties, ranges

The UCD File Format is very versatile.
This file is just a demonstration of the flexibility.

 # ucd1.inp Sample AVS UCD File 
 # 
 9 8 1 3 5                 9 nodes, 8 cells, 1 node data, 3 cell data, 5 model
 1 0.000 0.000 1.000       Node coordinates
 2 1.000 0.000 1.000 
 3 1.000 1.000 1.000 
 4 0.000 1.000 1.000 
 5 0.000 0.000 0.000 
 6 1.000 0.000 0.000 
 7 1.000 1.000 0.000 
 8 0.000 1.000 0.000 
 9 0.500 0.600 0.707
 1 1 hex 1 2 3 4 5 6 7 8  cell id, material id, cell type, cell node numbers 
 2 1 tri 1 3 4
 3 1 pt  1
 4 1 tet 2 3 4 5
 5 2 line 7 9
 6 2 quad 2 4 6 8
 7 2 prism 1 2 3 6 7 8
 8 2 pyr   2 3 4 5 6
 1 1                      number of node components, size of each component 
 stress, lb/in**2         Component name, units name 
 1 4999.9999              Data value for each node component 
 2 18749.9999 
 3 37500.0000 
 4 56250.0000 
 5 74999.9999 
 6 93750.0001 
 7 107500.0003 
 8 5000.0001
 9 5001.0000
 1 3                      number of cell components, size of each component
 RGB, cell color          component name, units name
 2 1.0 0.0 0.0            Data value for each cell component
 1 0.0 1.0 0.0            (Do not have to be in order, some may require order)
 3 0.0 0.0 1.0
 4 1.0 1.0 0.0
 5 1.0 0.0 1.0
 6 0.0 1.0 1.0
 7 0.5 0.5 0.5
 8 0.7 0.7 0.7
 2 2 2                   number of model components, size of each component
 limits, min/max min/max component name, value description
 range,  min/max min/max component name, value description
 1 -1.0  1.0 -1.0  1.0
 2 -1.2  1.2 -1.3  1.3
 3 -1.5  1.5 -1.6  1.6
 4 -1.9  2.0 -2.0  1.9
 5 -2.0  2.0 -2.0  2.0



Just for fun, a real three pronged blivet



UCD format blivet.inp for above labeling




Triangle files

.poly, .ele, .node  triangle and showme

.tri, .bound, .coord 


MatLab files

coord.dat, elem3.dat, elem4.dat, dirich.dat, neum.dat



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