Python: cannot modify newly created vray attributes

[Fredrik Averpil]

I'm adding a vrayDisplacement node and wish to modify its attribute values using python. For some reason I can't run the code in one go, probably because the UI/attribute editor needs to get refreshed, which only seems to happen when the script has finished.

This means I am right now forced to create two scripts which has to be manually executed one after the other in order for this to work. Any ideas on how I could make this code work in one go?

import maya.cmds as cmds
import maya.mel as mel

selected = cmds.ls(sl=True) # Get selected objects
mel.eval("vray objectProperties add_single VRayDisplacement") # Create vrayobjectproperties node and attach the selected objects
vrayObjProp = cmds.listConnections(selected[0]) # Grab name of vop node (sketchy method)
mel.eval("vray addAttributesFromGroup " + vrayObjProp[0] + " vray_displacement 1;") # Adding attribute vray displacement control

cmds.select(vrayObjProp[0], replace=True, noExpand=True) # Select the AETemplate to be force-refreshed so that we can access the newly created attributes
cmds.refreshEditorTemplates # Refresh of selected AETemplate

cmds.setAttr(vrayObjProp[0]+".vrayDisplacementType", 0) # Set 2d displacement
cmds.setAttr(vrayObjProp[0]+".vray2dDisplacementResolution", 1024) # Texture size
cmds.setAttr(vrayObjProp[0]+".vray2dDisplacementFilterTexture", 0) # Turn texture filtering off

[bigbossfr]

I'm adding a vrayDisplacement node and wish to modify its attribute values using python. For some reason I can't run the code in one go, probably because the UI/attribute editor needs to get refreshed, which only seems to happen when the script has finished.

This means I am right now forced to create two scripts which has to be manually executed one after the other in order for this to work. Any ideas on how I could make this code work in one go?

import maya.cmds as cmds
import maya.mel as mel

selected = cmds.ls(sl=True) # Get selected objects
mel.eval("vray objectProperties add_single VRayDisplacement") # Create vrayobjectproperties node and attach the selected objects
vrayObjProp = cmds.listConnections(selected[0]) # Grab name of vop node (sketchy method)
mel.eval("vray addAttributesFromGroup " + vrayObjProp[0] + " vray_displacement 1;") # Adding attribute vray displacement control

cmds.select(vrayObjProp[0], replace=True, noExpand=True) # Select the AETemplate to be force-refreshed so that we can access the newly created attributes
cmds.refreshEditorTemplates # Refresh of selected AETemplate

cmds.setAttr(vrayObjProp[0]+".vrayDisplacementType", 0) # Set 2d displacement
cmds.setAttr(vrayObjProp[0]+".vray2dDisplacementResolution", 1024) # Texture size
cmds.setAttr(vrayObjProp[0]+".vray2dDisplacementFilterTexture", 0) # Turn texture filtering off

Hi,
Use evalDeferred command and not eval.

[Fredrik Averpil]

I can't get that to work either. Same problem. Can't set the attributes...

I first tried this:

# Select an object and then...
mel.eval("evalDeferred \"vray objectProperties add_single VRayDisplacement\"")
mel.eval("evalDeferred \"vray addAttributesFromGroup vrayDisplacement vray_displacement 1;\"")
cmds.evalDeferred('cmds.setAttr("vrayDisplacement.vrayDisplacementType", 0)')

Then I went with this:

# Select an object and then...
cmds.evalDeferred('mel.eval("vray objectProperties add_single VRayDisplacement")')
cmds.evalDeferred('mel.eval("vray addAttributesFromGroup vrayDisplacement vray_displacement 1;")')
cmds.evalDeferred('cmds.setAttr("vrayDisplacement.vrayDisplacementType", 0)')

Am I doing something wrong?

[ivaylo.ivanov]

It's working here. You probably need a newer build.

[Fredrik Averpil]

It's working here. You probably need a newer build.

Yep, that was it. Thanks to both of you!