[vtkusers] vtkArrowSource rotation issue

Markus Ott ott-markus at t-online.de
Sun May 16 05:24:35 EDT 2010


Thanks! This helped me a lot :)

Bill Lorensen schrieb:
> Here is an example:
> http://vtk.org/Wiki/VTK/Examples/GeometricObjects/Display/OrientedArrow
> that orients an arrow along an arbitrary direction.
> 
> Bill
> 
> On Thu, May 13, 2010 at 10:46 AM, Markus Ott <ott-markus at t-online.de> wrote:
>> Hi,
>>
>> i have a problem rotating vtkArrowSource. A instantiated arrowSource
>> points from [0, 0, 0] to [1, 0, 0] with it's origin at [0, 0, 0]. If i
>> want to rotate this thing to [1, 1, 1] what is the correct way to do
>> this rotation?
>>
>> Obviously I need a rotation of 45 degrees around the y and the z axis.
>> Doing this via my actor works for each axis perfectly but putting it all
>> together the arrow doesn't point to the desired location:
>>
>> actor.RotateWXYZ(45, 0, 0, 1);
>> actor.RotateWXYZ(45, 0, 1, 0);
>>
>> What is the right way of doing this? I just don't get it!
>>
>> Thanks so far.
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