Getting Ramp Color Index's

[mcomet]

Does anyone know of a mel way to get a Ramp's color entry list index's. ie: if you have a ramp with 3 colors in it, you will have:
ramp1.colorentrylist[1].color or ramp1.colorentrylist[1].position
where [1] can be 0..1..2..3....etc....

The problem is I want to search through the ramp to find a index at a certain postition....but lets say the users ramp has indexes, 3 and 4....

If I do a:  getAttr (ramp1.colorentrylist[1].position);

then it MAKES a new ramp entry at that point with a default red color, thereby screwing up the ramp. Is there a way to get this info that anyone knows of?

Thanks.

-comet

[ja-go]

Hi,

I'm not sure whether there is a direct way to get the indices. On the other hand, a not-so-efficient way is to check whether the size of the color has increased when you do a getAttr. If so, just delete the newly created entry.

int $size = `getAttr -size ramp1.colorEntryList`;
int $count = 0;

for ($i = 0; true; $i++)
    if ($count == $size)
        break;
    else
    {
       float $pos = `getAttr ("ramp1.colorEntryList[" + $i + "].position")`;

        // check whether the size has increased
        int $s = `getAttr -size ramp1.colorEntryList`;

        if ($s != $size)
           // delete the newly created color entry
           removeMultiInstance -break true ("ramp1.colorEntryList[" + $i + "]");
        else
        {
            $count++;
           
            // do whatever thing you want here
        }
    } 

Do let me know if there is a more efficient way.

rgds,
pipit

PS: my blank spaces are eaten. 8(

[ivorg]

hi,
I tried a similar method, but found that while
you get the size of the array by using the -size
flag when you include a for loop the $i counts
sequentially. Therefore, if your array does not
include a RampName.colorEntryList[0] then it
creates it!

Still trying to get a print of the actual array!

Sorry this doesn't help, but it might explain
the problem.

Cheers,

Ivor

[mcomet]

Pipit, thanks, your solution work great...not the most nicest, but it's fast enough you don't see the gradient changing back and forth, and I only have to call this once anyhow in my script...so... Thanks again!

-comet

[rivard]

(thought I would use this topic for my post)
OK;
I have a texture that has a transparency ramp with animated colorentrylist positions, and am trying to make the colorentrylist position_# of ramp A (transparency) to animate the colorentrylist_# position of ramp B (color ramp) but this is when the problems occur; it seems like the colorentrylists are not attributes but propper nodes, so how can I connect them with more complexity than a straight connection? I tried the devide mutiply or add substract nodes, but can't seem to get that to work (and I guess it's on these that I need help).

Hope hearing from you shortly-

-SHydo

[campbell]

who knows if this was in the '00 maya incarnations, but listAttr -m, for those who might also go trawling.

[brubin]

getAttr ramp1.colorEntryList["*"].position
// Result: 0.09 0.5 1 //

so:
float $rpos[] = getAttr ramp1.colorEntryList["*"].position ;
print $rpos[0] ;

// Result: 0.09 //
gives you the value of colorEntry[0].position

HIH
s.