Cops question

[walterbehrnes]

Hi,

I am trying to get data from cops mapped into the point color in a Sop network. Currently I have a cop network that creates a noise.

How do I transfer data form the COP noise node to my pointSop color attribute? I thought maybe I need to use tex() but wouldn't that need a texture file written out? So, basically I want to not write a texture and just reference what the cop node is creating. Any ideas on how to do this???

thanks,

Walter

[malexander]

Nope, tex() does not require a texture to be written out. It simply cooks the COP specified (if needed) and looks up the color at the UV position provided.

[walterbehrnes]

so, to access the color of the noise field do I map into the pointSops color attribute this?

tex("../cop2net1/noiseOut",$MAPU,$MAPV,r)

tex("../cop2net1/noiseOut",$MAPU,$MAPV,g)

tex("../cop2net1/noiseOut",$MAPU,$MAPV,

This gives me a solid color instead of the noise pattern. I pulled my mesh density very hight to transfer more information from the noise.

I guess I could just map in noise($TX,$TY,$TZ) to give me a noise field... but would it be quicker to use cops in this instance?

[stevenong]

You were very close but you have to use the op: syntax when referencing an OPerator that provides data needed for the function. When using the op: syntax, you have to supply the full path to the OPerator

tex("op:/obj/name_of_object/cop2net1/noiseOut",$MAPU,$MAPV,r)
tex("op:/obj/name_of_object/cop2net1/noiseOut",$MAPU,$MAPV,g)
tex("op:/obj/name_of_object/cop2net1/noiseOut",$MAPU,$MAPV,b)

Cheers!

steven

[hkrol]

An alternative is the pic() expression function. The tex() function doesn't seem to work properly with float comps and does not update interactively.

Instead of r,g,b you would have to use D_CR, D_CG, D_CB.

- Henning