Maya\python Incremental button that increment value

Question

I'm new in python. I try to make a button in Maya that increments the value of the crease edges. Each time I click on it I want to make +1 to the crease value.

I tried this :

def crease(ignore):
    value=+1
    newvalue = value
    for i in value(int(newvalue)+1):
        maya.cmds.polyCrease(i)

But it doesn't work. If somebody could help I really appreciate any help you can provide

score 2 · Accepted Answer · answered Aug 06 '18 at 08:59

It's a problem of nesting values, when your value is under a def, it is not not stored in the global scope.

counter = 0

def crease(ignore):
    value = counter+1
    maya.cmds.polyCrease(v=i)
    return value

counter = crease(0)

if you want to keep track of the counter, you can create a global : Can not increment global variable from function in python

a dict : python modify a dictionary inside a method

or even a class.

score 1 · Answer 2 · answered Aug 06 '18 at 19:36

As it happens, cmds.polyCrease includes a flag that does what you want:

cmds.polyCrease(rv=1)

will bump the crease value on the currently selected components by 1; a negative value will bump it down. A global counter works from a programming standpoint but it will probably have surprising results if you hop between different objects in the scene.

Maya\python Incremental button that increment value

2 Answers2