renderable curve attribute startWidth

[AardmanCGI]

Hi

I am trying to render a load of curves but can't seem to control the width properly...

The default 0.2 startWidth is too big so i set it to .05 but it rounds back to 0.1. This is still too big but if i set it to anything below .05 it just renders a 1 pixel line..

Cheers,

Nathan

[ivaylo.ivanov]

Only the UI control is doing the rounding. The exact value is used internally.

[AardmanCGI]

ok so the only way i can get around this is to setAttr.

If i set it manually through the ui to .03 and the call getAttr "curveShape2.vrayNurbsCurveStartWidth" i get 0.
If i setAttr i get .03

This seems specific to this attribute as my precision for everything else is set to 3 decimals.


Also is there a way to apply the one renderable curve attr to multiple curves?

Cheers

[AardmanCGI]

in this case it actually looks like the maya ui is rounding it internally too

[Morbid Angel]

what I did in that case was I just took multiply/divide node and connected its out x to the start width, and used the precision value there instead. Its not very good though...

[alainfx]

If i set it manually through the ui to .03 and the call getAttr "curveShape2.vrayNurbsCurveStartWidth" i get 0.

Strange, it works all right in my tests here (no "rounded" bug).

What version do you use ?

I have this :
VRay stable build 19902 (2.10.01) from Mar 10 2012.
Maya2012 64bit Subscription Advantage Pack, Service Pack1 (released on 2012/01/26)
Windows Seven 64bit.

[ivaylo.ivanov]

Strange, in Maya 2012 it is doing the rounding only for display purposes. I did change the control to show 3 digits after the point though. You can download the nightly build from today if you have problems with this.

[AardmanCGI]

Hi sorry for the lat reply... we are using maya 2011.

Is there a way to add renderable curve attrs to multiple curves in a similar way to vrayDisplacement node?

Cheers

[vlado]

No, unfortunately; for the moment you'll have to script it, but it's on the "to do" list.

Best regards,
Vlado

[AardmanCGI]

renderable curve script

Ok no worries... already did.

usefull for anyone with the same prob...

import maya.cmds as mc
import maya.mel as mm
  
sel = mc.ls(sl=True)
for s in sel:
    shape = mc.listRelatives(s, shapes=True)[0]
    
    print shape
    
    try:
        mc.getAttr ("%s.vrayNurbsCurveRenderable"%shape)
    except Exception:
        mm.eval("vray addAttributesFromGroup %s vray_nurbscurve_renderable 1"%shape);
    
    mc.setAttr( "%s.vrayNurbsCurveRenderable"%shape, 1)
    mc.setAttr( "%s.vrayNurbsCurveTesselation"%shape , .1)
    mc.setAttr( "%s.vrayNurbsCurveStartWidth"%shape , .03)

[MartinB]

Nathan, you know my python is shocking. Trying to run the above code and get an # Error: unexpected indent #

EDIT: Don't worry, being abit dopey.

[vlado]

Actually in the latest builds we added a renderable curves set, so you can just connect all the curves that you want to render and control them from one place.

Best regards,
Vlado