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Importing multiple P3D grid files into Pointwise

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Old   January 24, 2017, 11:28
Default Importing multiple P3D grid files into Pointwise
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gsh
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Hello All,

I have separated a single domain into 48 blocks for parallel processing and I want to bring them back into Pointwise for grid refinement. I was wondering if there is a built-in means of importing multiple P3D grid files at a single time so that all of the grids are imported (rather than having to manually import each file). Or if there is no built-in function in Pointwise how do i go about writing a code to do so?

Thank you for the assistance with this issue,
gsh
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Old   January 24, 2017, 19:45
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David Garlisch
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Nope. A script is your best bet.
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Old   January 27, 2017, 16:56
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Well I tried to do the journal file route: make a journal file, change the journal file code so it fits my purpose (hard coded), use re-appropriated journal/glyph file. However, since I have not found an explicit set of pointwise instructions on importing any file type; I have not been able to get the glyph to work. I put the code that I have been trying to use below.

Any insight would be appreciated.


----
package require PWI_Glyph

# X is the number of multi-blocks to import
# -----------------------------------------------
set x 48
set i 1

while {$i <= $x} {

# grid is the location and file
set grid_file "/home/split-on-hub/ast.b$i.x"
set _TMP(mode_1) [pw::Application begin GridImport]
$_TMP(mode_1) initialize -type Automatic {$grid_file}
$_TMP(mode_1) read
$_TMP(mode_1) convert
$_TMP(mode_1) end
unset _TMP(mode_1)
incr i
}
----
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Old   January 27, 2017, 17:28
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Since you changed the literal file name in the journal from {/path/to/the/filename.x} to a variable, you don't want the {} any more.

So change:
$_TMP(mode_1) initialize -type Automatic {$grid_file}
to
$_TMP(mode_1) initialize -type Automatic $grid_file

Also, since you know the actual file type, you can change Automatic to PLOT3D.


FINAL SCRIPT:

Code:
package require PWI_Glyph

# $numFiles is the number of multi-blocks to import
# -------------------------------------------------
set numFiles 48

# Only need to create mode once and reuse it
set ioGrid [pw::Application begin GridImport]

for {set i 1} {$i <= $numFiles} {incr i} {
  # use ${i} embedded inside string to make variable name explicit.
  # otherwise parser might think the var name is $i.x
  $ioGrid initialize -type PLOT3D "/home/split-on-hub/ast.b${i}.x"
  $ioGrid read
  $ioGrid convert
}

# Now we are done with mode.
# Using "end" will make all changes permanent.
# Using "abort" will throw away all changes made since mode was created.
$ioGrid end
unset ioGrid


Why?

In Glyph (Tcl) anything inside {} is NOT expanded with variable substitution. So your code was trying to import a file actually named {$grid_file}.


A little trick:

Code:
# capture the script folder
set scriptDir [file dirname [info script]]

# construct full path and filename
set fullFileName [file join $scriptDir "filename.x"]

# $fullFileName is something like:
#    /path/to/script/folder/filename.x
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Old   January 27, 2017, 17:58
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gsh
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Thank you I very much appreciate the help, that worked perfectly!

Now that i have a working example I think I will try to write a script to export blocks into Plot3D files after manipulating the number of blocks.

Thanks again!
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Old   January 27, 2017, 18:13
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David Garlisch
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Slightly more advanced script with error checking and progress output...

Code:
package require PWI_Glyph

# $numFiles is the number of multi-blocks to import
# -------------------------------------------------
set numFiles 48

# Only need to create mode once and reuse it
set ioGrid [pw::Application begin GridImport]

for {set i 1} {$i <= $numFiles} {incr i} {
  # use ${i} embedded inside string to make variable name explicit.
  # otherwise parser might think the var name is $i.x
  set xFile "/home/split-on-hub/ast.b${i}.x"
  puts "loading $i of $numFiles: $xFile"
  if { [catch {$ioGrid initialize -type PLOT3D $xFile} err] } {
    puts "  Could not initialize $xFile"
    puts "  $err"
    continue
  }
  $ioGrid read
  $ioGrid convert
}

# Now we are done with mode.
# Using "end" will make all changes permanent.
# Using "abort" will throw away all changes made since mode was created.
$ioGrid end
unset ioGrid

puts "grid: [pw::Grid getAll -type pw::Block]"
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Old   January 27, 2017, 18:34
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David Garlisch
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And another version that uses pattern matching...

See Full Glyph script documentation.
See Full Tcl documentation.


Code:
package require PWI_Glyph

set xFileDir "/home/split-on-hub"
set pattern "ast.b*.x"

# find all files in $xFileDir matching $pattern
set xFiles [glob -nocomplain -directory $xFileDir -- $pattern]

# Only need to create mode once and reuse it
set ioGrid [pw::Application begin GridImport]

set i 0
set numFiles [llength $xFiles]
foreach xFile $xFiles {
  puts [format "Loading file %3d of %d: %s" [incr i] $numFiles $xFile]
  if { [catch {$ioGrid initialize -type PLOT3D $xFile} err] } {
    puts "  Could not initialize $xFile"
    puts "  $err"
    continue
  }
  $ioGrid read
  $ioGrid convert
}

# Now we are done with mode.
# Using "end" will make all changes permanent.
# Using "abort" will throw away all changes made since mode was created.
$ioGrid end
unset ioGrid

set blks [pw::Grid getAll -type pw::Block]
puts {}
puts "[llength $blks] blocks imported:"
foreach blk $blks {
  puts "  [$blk getName] ($blk)"
}
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