LUA: Operator Precedence

Operator precedence in Lua follows the table below, from the higher to the lower priority:

      ^
             not  - (unary)
             *   /
             +   -
             ..
             <   >   <=  >=  ~=  ==
             and
             or


All binary operators are left associative, except for `^´ (exponentiation) and `..´ (concatenation), which are right associative. Therefore, the following expressions on the left are equivalent to those on the right:

    a+i < b/2+1      <-->   (a+i) < ((b/2)+1)
    5+x^2*8          <-->   5+((x^2)*8)
    a < y and y <= z <-->   (a < y) and (y <= z)
    -x^2             <-->   -(x^2)
    x^y^z            <-->   x^(y^z)

When in doubt, always use explicit parentheses. It is easier than looking up in the manual and probably you will have the same doubt when you read the code again.

  
  
  

Arrow Code

Thanks Nihal for your first contribution on Limbeshwar's blog, and here's an abstract example ;)

if (ui->exDirChkBox->isChecked()){

    for (int j = 0; j < dirExclLst.count(); j++){

            for(int k = 0; k < dirList.count(); k++){

                QString strDrv = dirList[k].fileName();

                QString exlLstName = dirExclLst[j];

                if (strDrv == exlLstName){

                    dirList.removeAt(k);

                }else{

                //Do Nothing

                }

            }

    }

}

Arrow Code

Welcome to the world of arrows.

Nihal Kenkre: Arrow code

Inspiration of this Blog...

I was really-really lost in the code I was developing for some pipeline stuff and at a point stumbled upon this image: From http://linuxlove.amazingdev.com/post/1327091605/programmers-limbo-i-hate-it-when-this-happens

The Limbo...You can click the Image if you want to read properly...

...

an After Effects Portal: Volumetric smoke: Particular tutorial

an After Effects Portal: Volumetric smoke: Particular tutorial: "Peder Norrby posted an After Effects tutorial and project on making Volumetric smoke with Trapcode Particular: "Read More"

YouTube Blog: Now in 3D: Join the Experiment With Us!

YouTube Blog: Now in 3D: Join the Experiment With Us!: "First there was 1953's 3D thriller 'House of Wax,' then there was the Michael Jackson adventure 'Captain EO,' and this summerthere are at lea..."

WOW! But why place right eye on the left and the left eye on the right. We can code it...right?

Or is it a Limbo in-self...

...

MEL: Time Kill

So, you are sitting in the studio, and nothing-as-such is assigned to you, or may be you just do not wish to move that stupid mouse for some time and take a break, but want to look like working darn hard:

Here's a small script for you...

1. int $amount = 0;
2. 
   
3. progressWindow
4. -title "Initializing..."
5. -progress $amount
6. -status "Preview: 0%"
7. -isInterruptable true;
8. 
   
9. while (true) {
10. 
    
11. // Check if the dialog has been cancelled
12. if ( `progressWindow -query -isCancelled` ) break;
13. 
    
14. // Check if end condition has been reached
15. if ( `progressWindow -query -progress` >= 100 ) break;
16. 
    
17. $amount += 1;
18. 
    
19. progressWindow -edit
20. -progress $amount
21. -status ("Preview: "+$amount+"%");
22. 
    
23. pause -seconds 3;
24. }
25. 
    
26. progressWindow -endProgress;

Put it in a shelf button. When executed, it'll create a DUMB progress windw, which does nothing but wait for time specified to complete it's function and go off. You can change "strings" in line number 4, 6, 21 according your needs. To play with time: change variable $amount increment and `pause` at line number 17 and 23 respectively.

P.S. Hope my employers don't go through this ;)

MEL: Select Similar Objects

So here 's small script which will select similar Polygon objects in a maya Scene: Just select the base object and execute the script, and viola, all similar objects are selected for you. This is specially useful for large scenes.

int $c = 1;

global proc SelSimObj(string $every)

{

int $c = 1;

string $every = $every;

int $sel[3] = `polyEvaluate -v -e -f $every`;

string $b[] = `ls -typ mesh`;

for ($each in $b)

{

int $counter[3] = `polyEvaluate -v -e -f $each`;

if ($counter[0] == $sel[0] && $counter[1] == $sel[1] && $counter[2] == $sel[2]){

select -add $each;

clear $counter;

};




};

clear $sel;

clear $b;




}




string $SelList[] = `ls -dag -typ "mesh" -sl`;

for($every in $SelList)

SelSimObj ($every);

clear $SelList;

LUA

Is it worth delving in-to it? LUA. I mean, why the hell Eyeon guys chose it for Fusion? Why not python.

ok I got it: http://stackoverflow.com/questions/356160/which-game-scripting-language-is-better-to-use-lua-or-python

http://lua-users.org/wiki/LuaVersusPython

And, to summaries:

Lua uses less memory and has faster interpreter and JIT compiler. Lua C integration is cleaner.

Python has a larger standard library and a much larger ecosystem built around it.

Operator Precedence in MEL:

This Image shows order of operator precedence in MEL. Operator in same row has equal precedence. Left most operator is evaluated first, if a statement has more then one operators of equal precedence. Something we generally don't care of, then can't figure out why things are messing up.

For C++ and C references, look here:

http://www.cppreference.com/wiki/operator_precedence

http://www.difranco.net/cop2220/op-prec.htm

Who Am I

PROGRAMMER: Someone who fixes a problem you didn’t know you had in a way you don’t understand.

Google Profile

Found this today: http://www.google.com/profiles/108548859666328462105 Never Knew it exists ;)

The |Code Project

Trying to find the source-code of this Life, it's my own version of The Code Project.

And I Hope it's open Source!

First Limbo (on the blog):

So can we get out of a loop (through a user Input-in the same app. or program) while it's still running. It's a Limbo in itself.