function reference

Hi all,

So, in Fusion you can enter formulae in lots of fields.
Where can I find a list of which mathematical and logical functions are available?
There is no mention of it in the Davinci Resolve 18.x Reference (pdf) nor in the Fusion Reference Manual 18.6 (pdf)
Up till now I only found the immediate if [ iif(,,) ] statement because it was used in a youtube video..

When I tried to follow a tutorial they used a particle id [id] and they were visible as a column of dots. Not so in my version of Fusion. The tutorial was of 6 years ago so probably the format of the [id] field has been changed.

So, I wondered if I could divide the [id] by 100 and that worked almost. There was much variance in the x-axis and y-axis. Thus I wanted to make the result an integer, but none of the functions I tried proved successful (apparently non-existent functions). Like CInt() Integer() Round() Floor() Ceiling().. non of them worked.

so, what functions can be used in expressions ?
Thanks
Paul

Isn't it pretty much Lua syntax and built-in Lua functions?

cool - I'll start looking at the LUA references then

It's Lua, but with a few additions and little obnoxious caveats here and there. For instance, iif() isn't part of Lua proper—it was added to the simple expressions as a short cut to the full if-then structure, which requires multiple lines.

For expressions, most of the math library can be accessed without needing to preface with the library name. So instead of math.min(), you can just use min().

In the Tool Reference section of the manual, look up the Custom Tool. It has some documentation on features that work in both pCustom and CustomVertex3D, and also the Expression Modifier.

There are some helpful tips in the recovered VFXPedia available over at steakunderwater.com:
https://www.steakunderwater.com/VFXPedi ... xpressions

And I know there was someone who put together a nice expressions cookbook for Fusion, but I don't recall off the top of my head who it was. Enough searching will likely turn it up, though

The user guide has a couple pages dedicated to sample simple expressions.

you can find a lot of example son this page.

https://another-davinci-resolve-blog.bl ... sions.html