Matrix Identity

Helper

On 18/06/2014 at 14:42, xxxxxxxx wrote:

In Blender I can do the following to check if an object has been transformed:

ident_matrix = Matrix.Identity(4)
obj_moved = obj.matrix_world != ident_matrix

I don't see any matrix identity functions in C4D.
Am I missing something?

If there isn't, what is the best way to check if an object has been transformed?

Thanks,

Chris

Helper

On 21/06/2014 at 13:32, xxxxxxxx wrote:

Couldn't find anything, so I guess you have to roll your own:

def CheckIdentity(op) :
    matrix = op.GetMg()
    
    if matrix.off == c4d.Vector(0,0,0) and \n       matrix.v1 == c4d.Vector(1,0,0) and \n       matrix.v2 == c4d.Vector(0,1,0) and \n       matrix.v3 == c4d.Vector(0,0,1) :
       
        return True
  
    else:
        return False

This does the trick.

Helper

On 21/06/2014 at 15:52, xxxxxxxx wrote:

This does what I wanted, and is the simplest answer:

obj.GetMg() == Matrix()

The function above could be used to check for a particular transformation, but it is overkill for this.