Running a fn on classes of objects that only have a material?

[Anonymous]

Hi,

I have a script that applies a material wrapper to all materials in a selection set so I can apply a matte to multiple objects. Works well.... but if a light or camera is in the selection it goes haywire.

I have tried using if ==classof to sort out objects but cant work out how  only to use objects with a material attribute applied? I have included where selection[i].material!=undefined but that does not do what i need

Can anyone point me in the right direction?

a snippet is of the code as it stands now is:

MatBank=for i in 1 to selection.count where selection[i].material!=undefined collect selection[i].material

mySlot=MatBank.count
for i=1 to mySlot do
(

--apply the material wrapper etc

)

Thanks for any leads

Mike

[miauuuu]

Something like this.

MatBank = for i in 1 to selection.count \
		where (selection[i].material!=undefined) \
			and superclassof o != light \
				and superclassof o != camera \
					and classof o != Targetobject collect selection[i].material

[Anonymous]

Hi thanks for the snippet,

I think I am getting closer but I have some fundamental gaps in my knowledge

1st really simple one that will highlight how little I know about using loops

should not the o in below by i?

superclassof o != light

second issue I having is if the loop selects a group it goes haywire

I have tried using the filter only to pickup the superclass of GeometryClass but it does not work

MatBank = for i in 1 to selection.count  where (selection[i].material!=undefined)  and superclassof i == GeometryClass collect selection[i].material

but it still selects the group ?

any help out there?

thanks

Mike

[miauuuu]

You have one error in your code. Here the correct syntax:

MatBank = for i in 1 to selection.count  where (selection[i].material!=undefined)  and superclassof selection[i] == GeometryClass collect selection[i].material

 I am sure that you can find the error.

About the FOR loops and the difference between for o in objects do an for i = 1 to objects.count do, please read in maxscript help file the topic of

For Loop By Index Vs For Loop Through Collection Performance

[Anonymous]

Thanks ..I can see the syntax needs the superclass of the slection array not the loop iteration number itself

apreciate your time. 

cheers

Mike

[Anonymous]

Hi me agian,

code works well generally but the following code selects an open group dummy even though it is not of a superclass of Geometry?

MatBank = for i in 1 to selection.count  where (selection[i].material!=undefined)  and superclassof selection[i] == GeometryClass collect selection[i].material

How can this be?

[miauuuu]

I don't have this problem.

Useing this

collect selection[i].name

the script collects the names of the objects(open group with 4 spheres I used in my test) and the dummy is not in the collected objects.

Can you attach the scene and the exact code that you use?

By the way, the superclass of the group dummy is HELPER. Create an group, open it, type this in the listener and execute it

superclassof $Group001

I assume that the name of the group is Group001, and the result should and will be

helper

[Anonymous]

Hi

This is the complete script

It is a Vray script so I can easily apply a wrapper material for Mattes





I would be interested inyour thoughts

It works well but I still need to write the code to open all groups select
all objects then close all groups but not select the helper or dummy of the
group



cheers






Mike Nowson


Ph. 0410 527 366









cid:image001.gif@01CE3C38.4CBD1BA0






Melbourne

Geelong

3idstudios.com.au

miken@3idstudios.com.au


PO Box 73,

Shop 6,79 Ryrie St

Ph. 1 300 55 33 69

Animation


North Carlton,

Geelong, Vic.

Ph. (03) 52 219 420

3D Visualisation


3054.

3220.

ABN 61640261424

3D Data simulation

[miauuuu]

I can't find the script in your post(no links or etc.). Also, it is good idea to upload sample scene, because the problem may be in the scene, not in the script.

Why you need to open groups, then to close them?

[Anonymous]

Hi,

sorry on the attachment I just replied to the email but by the looks of it it does not auto-attach the attachmet to the post

The file is attached, as is a max file

I have put a hide selected in the loop so I can see what is being modified

Group 3 hangs the process when open 

as allways there is probably a very simple explanation?

The more I think about it a better way would be just to change the Vray property rather than going through applying a Material Wrapper....... but I am that close I am going to finish this script.

cheers

[miauuuu]

Hi!

The problem with your script is the... Download the attachment and check my comments.

If you can understand my explenations, because my english is not very good, I can try to explain again why your code not works properly.

🙂

[Anonymous]

Hi I suspected that the 2 array values were different.

I need to sit down and spend some time and pull the script apart.

I am most grateful for your time and efforts

Thanks

Mike

[miauuuu · Accepted solution]

Glad to help.

🙂