Forums Houdini Indie and Apprentice Matrices in VEX; what does the ampersand with matrices mean?

Matrices in VEX; what does the ampersand with matrices mean?

   1726   3   0
User Avatar
Fabrizio123
Member
11 posts
Joined: April 2011
Offline
 
For example

void rotate(&m, amount, axis)

I used to know it 6 months ago, I even made a note on it but now I can't find that note.
 Report
User Avatar
animatrix_
Member
4705 posts
Joined: Feb. 2012
Offline
 
Hi,

It means the argument is passes by reference:
https://pediaa.com/what-is-the-difference-between-pass-by-value-and-pass-by-reference/#:~:text=The%20main%20difference%20between%20pass,parameter%20passes%20to%20the%20function.
Senior FX TD @ Industrial Light & Magic
Get to the NEXT level in Houdini & VEX with Pragmatic VEX! [www.pragmatic-vfx.com]

youtube.com/@pragmaticvfx | patreon.com/animatrix | pragmaticvfx.gumroad.com
 Report
User Avatar
tamte
Member
8787 posts
Joined: July 2007
Offline
 
generally in VEX it just means that that variable will be modified
so your m matrix itself will be rotated, rather than rotated matrix being returned from the function
Tomas Slancik
FX Supervisor
Method Studios, NY
 Report
User Avatar
Fabrizio123
Member
11 posts
Joined: April 2011
Offline
 
Thanks a lot to both of you for your generous replies.
 Report
  • Quick Links