Add color to existing color based on attribute?

[Krion]

Hi!

 

So I have this grid who has colours from a from a noise, and then I make them lines and jitter them. 

I have made an attribute on it called 'eye'. And I want at the end of the chain to color my object a predefined red (color vector) where the 'eye' attribute is 1. And I want this on top of the existing color, which is what I don't know how to do.

How can I layer different colours on top of each other based on attributes in VEX and in VOPs (or any other way)?

AddColorToExistingColor.hipnc

 

Thank you!  

Edited May 14, 2019 by that Abstract guy

[3dome]

not sure if that's what you're after, but use one of these lines to see different effects

//if(f@eye>0) @Cd = {1,0,0}; //overrides the color where @eye is 1
//if(f@eye>0) @Cd += {1,0,0}; //add red where @eye is 1
if(f@eye>0) @Cd *= {1,0,0}; //multiply with red where @eye is 1

[Krion]

Ah I see. And how would you do it if you want it like a gradient? Or lets say: like an override, but only overridden 50% wherever the attribute is 0.5?

[anim]

lots of ways, but you can use for example Mix VOP in vops or lerp() function in VEX to mix colors by attribute (see example with both)

vector color = chv("color");
v@Cd = lerp(v@Cd, color, f@eye);

 

AddColorToExistingColor_fix.hipnc