Hello,

I use a scatter sop with color attribute. The color value comes from HDR image and sometimes exceeds 1.0 .
I would like to fit all my point to reach the maximum value to 1.0.
How can I read the 3 components of the color of each points and get the maximum value inside them ?

Thanks for your help

Vincent

I have an asset that takes a float attribute and compute the min and max per frame and also across a time range.

vbk!!!
Hello,

I use a scatter sop with color attribute. The color value comes from HDR image and sometimes exceeds 1.0 .
I would like to fit all my point to reach the maximum value to 1.0.
How can I read the 3 components of the color of each points and get the maximum value inside them ?

Thanks for your help

Vincent

Hi Vincent,
I think your getting confused From the HDR image its the value you want to read in the Pixel from HSV which is then can be turned into an attribute and applied. I used the technique to sample a HDR to find the averaged brightest pixel from an HDR. I used this as a position and value for a key light. I made a tool some time ago and will have to dig out the workflow as it took some figuring.

rob

Thanks Alejandro,
It seems your otl do exactly what I am looking for.

Rob,
Not sure to understand what you wrote …
My purpose is to read through points attribute but the fact is I didn't think to use HSV intead of RGB. What the way to convert it in VOP ?

Hi,

Try the RGB to HSV VOP.

of course …

thx !