Declare Matrix in a Attrib Wrangle

[Justin K]

Hello! 

what is the correct syntax for correctly declaring an empty matrix3 in vex?  

Atypically most people just use 

matrix3 mat = ident();

Can I decalre a matrix the same way I would a vector or float? (I just want to see all my variables on the spreadsheet while working through some code ) 

Example 

@N = {0,1,0); 

@f = @ptnum; 

I can see these on the spreadsheet

matrix3 mat = ident(): I cannot

 

Also, what are the technical terms for one versus the other?  -- local attributes (no @ symbol)  versus global variables (@symbol)?  

Thanks!

[coltonmil]

Hey Justin,

To declare a 3x3 matrix the way you're trying to:

3@mat = ident();

2@ for 2x2 and 4@ for 4x4. The technical terminology is attribute with the @ symbol, and a parameter when it's just within the snippet.

Edit: here's a lot more info http://www.sidefx.com/docs/houdini/vex/snippets.html

Edited January 29, 2018 by coltonmil

[Justin K]

1 hour ago, coltonmil said:

Hey Justin,

To declare a 3x3 matrix the way you're trying to:

3@mat = ident();

2@ for 2x2 and 4@ for 4x4. The technical terminology is attribute with the @ symbol, and a parameter when it's just within the snippet.

Edit: here's a lot more info http://www.sidefx.com/docs/houdini/vex/snippets.html

Thanks!