Paint color by object

[Juzwa]

Hi, 

 

I'm having problems with activating/disactivating my constraints in the bullet sim. This will explain the problem:

 

 

I'm using just an attribute transfer SOP. But you can see that thats not how the constraints should work.

 

I'd like the points I'm painting to stay in the color I painted them with attribute transfer.

 

So I played with creating a new attribute 'make_active' and then to make the attribute transfer run over on some value on the 'make_active' attribute. 

 

However I can't make anything working, I'm not that fluent in Houdini.

 

How can this be done?

[3iart]

use a solver sop

[Juzwa]

I have looked into solver sop, and managed to do a simple scene. 
 
I want to transfer the color information (green) onto the 'activated' parameter. I have no idea why setAttribute does not work, even when i just set it to some constant.

setAttr.hipnc

Edited February 21, 2015 by Juzwa

[3iart]

I'm still using 13, so this scene open broken for me. You need to plug in the previous frame and max between that and current. frame/input 1.

[rayman]

Right now you don't provide enough information for set attribute to work. 

Use Bind Export instead. Or you can instead use wrangle node - much faster to set up.

i@activated = 0;
if(v@Cd.x == 1){
    i@activated = 1;}

Oh, and you don't have to transfer colors and convert them to another attribute - you can transfer "activated" attribute directly.

 

To keep the attributes to the next frame switch the first input with the "Prev_frame" instead of "Input_1".

[Juzwa]

Indeed plugging in to Prev_Frame helped and it works now. So I dont need 'activated' attribute anymore

Edited February 21, 2015 by Juzwa