Object Axis modification in python

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 09/11/2012 at 13:06, xxxxxxxx wrote:

It sounds like something simple, but I'm not able to do it in Python.

I have e.g. a plane I want to rotate, not from the center, but from a specific side.
So, I need to change the object axis.

But how?

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 10/11/2012 at 14:30, xxxxxxxx wrote:

I think you can do it by change the position of the object and all his points to keep their global position.

Here is a little code that I did one day for it :

  
    
    
    import c4d
    from c4d import Vector, Matrix
    
    def axe(objet, matrice, relatif = True) :
        if relatif : m_obj = objet.GetMl()
        else : m_obj = objet.GetMg()
        
        m = ~matrice * m_obj
        nbpts = objet.GetPointCount()
        points = objet.GetAllPoints()
        
        for i in xrange(nbpts) :
            points[i] = m.Mul(points[i])
    	
        objet.SetAllPoints(points)
        
        if relatif : objet.SetMl(matrice)
        else : objet.SetMg(matrice)
    
    def main() :
        if not op : return
        if op.GetType() != c4d.Opolygon : return
        
        doc.StartUndo()
        doc.AddUndo(c4d.UNDOTYPE_CHANGE, op)
        
        v_1    = Vector(0, 1, 0)
        v_2    = Vector(0, 0, 1)
        v_3    = Vector(1, 0, 0)
        dep    = Vector(0, 50, 0)
        mat    = Matrix(dep, v_1, v_2, v_3) # Nouvelle matrice
        
        axe(op, mat)
        
        op.Message(c4d.MSG_UPDATE)
        doc.EndUndo()
        c4d.EventAdd()
    
    if __name__=='__main__':
        main()

The variable mat is the new matrix who affect op.

Helper

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 11/11/2012 at 04:33, xxxxxxxx wrote:

Amazing, wonderful clever solution!
Thanks very much.