Blender Python – Make an unselectable object local so it can be selected..

Posted on by Oded Maoz Erell

Software:
Blender 2.79

If you happen to link an external object that was made unselectable in the original blend file, You will have no interactive way to make it selectable again, or local, or even delete it from the current blend file.

The good news is that it can easily be done by a very short Python script:

import bpy

obj = bpy.data.objects['the_untouchable_object']
obj.make_local()

It should also be very easy script a loop that will find all those linked objects,
I will post an example when I’ll have a minute to breathe… 😀

Notepad++ – Show White Space and TAB

Posted on by Oded Maoz Erell

Software:
Notepad++ 7.5.9

A lot of Python debugging frustration can be avoided by activating the ‘Show White Space and TAB’ option from the View > Show Symbol menu.

This view option displays yellow dots for White Spaces and yellow arrows for TAB indents in the script, and can save precious time locating places where the indentation is wrong.

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Maya Python scripting – Getting an object’s transform matrix relative to another object’s coordinates

Posted on by Oded Maoz Erell

Software:
Maya 2018

How to get an object transformation matrix relative to another object’s coordinates:
* The following script requires selecting 2 objects, the function will return the transform matrix of the first object relative to the transform matrix of the second.

from maya.api.OpenMaya import MVector, MMatrix, MPoint
import maya.cmds as cmds

def get_relative_transform (node,coordinate_space_node):
    node_matrix = MMatrix(cmds.xform(node, q=True, matrix=True, ws=True))
    parent_matrix = MMatrix(cmds.xform(coordinate_space_node, q=True, matrix=True, ws=True))
    return (node_matrix * parent_matrix.inverse())

node_a = (cmds.ls(sl=1,sn=True))[0]
node_b = (cmds.ls(sl=1,sn=True))[1]

print (get_relative_transform(node_a,node_b))

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Maya Python scripting – Getting an Object’s world-space transform matrix

Posted on by Oded Maoz Erell

Software:
Maya 2018

How to get an object transformation matrix in world space coordinates:

from maya.api.OpenMaya import MVector, MMatrix, MPoint
import maya.cmds as cmds

def get_world_transform (obj):
 return MMatrix ( cmds.xform( obj, q=True, matrix=True, ws=True ) )

selected_object = (cmds.ls(sl=1,sn=True))[0]

print ( get_world_transform( selected_object ) )

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