Conrol Proxy Mesh visibility via xml file

[ali_cgi]

Hey does anybody know what the python code would be to show or hide meshes in the proxy visibility list via an xml list.
Show/Hide all meshes according to name in xml list for proxy selection

[yolov]

We would be better able to help if you could let us know what exactly you're trying to achieve.

[ali_cgi]

Hey I think my explanation does exactly state what I would like to achieve, I have a vrayproxy file storing multiple meshes, if i printed an xml from the original maya file that these proxy were created from which stores the names of the meshes I would like to be visible, is it possible with python / mel to control the visibility of the meshes in the proxy. "Mesh01,02,03,04,05,06,07,08" etc in the vrayproxy. "xml file contains a list... example Mesh01,04. therefore only meshes 01 and 04 would be visible in the vray proxy. thanks

[t.petrov]

When do you want to execute this python/mel?
Do you want it executed at post-translate/pre-frame/pre-render time?
Do you want to make a button in a shelf which controls the visibility?

[ali_cgi]

Hey, A button on the shelf that just shows and hides the appropriate meshes in the viewport would be needed before any renderig begins, pre render time,
I imagine when it comes to submitting to the submitting renders to the farm it would be useful to be able to submit different variations of the mesh visibility list, but I imagine ill start thinking about that once i can get it working in the viewport,
Thanks

[ali_cgi]

Great to know if this is possible?

[deyan.spirov]

Yes, it should be easy to create such a script. For each of the visibility lists (names and ids lists for meshes, hairs and particles) there are two list attributes, one containing the names or IDs and the other containing a 0/1 for the visibility. They are matched by their index. Here are all the attributes:

"visibilityListNames", "objectListNames": Mesh names list
"visibilityListIDs", "objectListIDs": Mesh IDs list
"hairVisibilityListNames", "hairObjectListNames": Hair names list
"hairVisibilityListIDs", "hairObjectListIDs": Hair IDs list
"particleVisibilityListNames", "particleObjectListNames": Particle names list
"particleVisibilityListIDs", "particleObjectListIDs: Particle IDs list

To set them by name, you need to use the Names lists. Here is a simple MEL example searching for meshes that match a list of names and setting their visibility:

string $nodeName="mesh_vraymesh";
string $names[]={"pCubeShape1", "pSphereShape1"};

int $size=`getAttr -s ($nodeName+".objectListNames")`;
for ($i=0;$i<$size; $i++) {
    for ($j=0;$j<2;$j++) {
        if (`getAttr ($nodeName+".objectListNames["+$i+"]")`==$names[$j]) {
            setAttr ($nodeName+".visibilityListNames["+$i+"]") 1;
        }
    }
}

You can do the same for hair and particle lists. If this is slow, it can be optimized with a binary search, since the names are sorted.

[ali_cgi]

This works perfectly, thanks for the reply...
Any chance of a python conversion? A few bits here that imm not sure how to translate,

for ($i=0;$i<$size; $i++) { for ($j=0;$j<2;$j++) { & "+$i+" Thanks

[deyan.spirov]

It just iterates all the elements, it can be done in python like this:

nodeName="mesh_vraymesh"
names=["pCubeShape1", "pSphereShape1"]

size=cmds.getAttr(nodeName+".objectListNames", size=True)
for i in xrange(0, size):
    for j in xrange(0,2):
        if cmds.getAttr("%s.objectListNames[%i]"%(nodeName, i))==names[j]:
            cmds.setAttr("%s.visibilityListNames[%i]"%(nodeName, i), 1)

[ali_cgi]

Thanks perfect!