[DeAldeEiam]

Hello,

I have a problem with calculated values in my blockMesh file.

I get a value calculated for the amount of cells in a block
e.g. 5.666666666667
but I can only use integer
how can I round up 5.666666666667 to 6 in my blockMesh file?
I know setprecision(0) could work but how can I integrate it?

Thanks a lot

/*
this is an easy example
I get a value calculated for the amound of cells in a block
e.g. 5.666666666667
but I can only use integer6
how can I round up 5.666666666667 to 6 in my blockMesh file?
*/

roundUp 5.666666666667;

vertices
(
(0 25 10) // pt 0 (a1t)
(20 25 10) // pt 1 (a2t)
(20 3 10) // pt 2 (a3t)
(0 3 10) // pt 3 (a4t)

(0 25 0) // pt 4 (a1b)
(25 25 0) // pt 5 (a2b)
(25 2 0) // pt 6 (a3b)
(0 2 0) // pt 7 (a4b)

);

blocks
(

hex (4 7 6 5 0 3 2 1) ( 50 50 $roundUp ) simpleGrading (1 1 1)

);

[alexeym]

Hi,

You have #calc directive, where you can put C++ code. You can find usage examples in tutorials (using grep for example).

[DeAldeEiam]

Hello,

I found a solution.
You have to add Math::Round - Perl extension for rounding numbers to your calc function.

Explanation:

How to add Cpan Modules

Math::Round function

New calc function:
define(calc, [esyscmd(perl -e 'use Math::Round qw(:all); print ($1)')])

[alexeym]

So, you were trying to put this into M4 script.

There is POSIX::floor and POSIX::ceil (POSIX module), which do not require installation of additional modules. I.e. you can use

perl -e 'use POSIX (floor); print floor($1)'

Though, surely you can install additional Perl modules. Or you can even go further and try to round numbers with Smalltalk.