<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Dec 11, 2014 at 10:45 AM, Vincent32160 <span dir="ltr"><<a href="mailto:vsh@magellium.fr" target="_blank">vsh@magellium.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I wanted to talk about the data display but I was wrong, the transformation<br>
is applied in a complex way (cf picture below).<br>
On the right, a vtkImageReslice with the original data and on the left, a<br>
vtkImageReslice with the original data and a cylindrical transformation<br>
applied.<br>
Am I right if I say that I am supposed to get a pyramid instead of a<br>
rectangular prism (as seen on the picture)?<br>
Thanks<br>
<br>
<<a href="http://vtk.1045678.n5.nabble.com/file/n5729805/2reslices.png" target="_blank">http://vtk.1045678.n5.nabble.com/file/n5729805/2reslices.png</a>><br></blockquote><div><br></div><div>No, it shouldn't give a pyramid. The circumferencial coordinate "theta"</div><div>is measured in radians, so it has a range of [0,2*pi] regardless of whether</div><div>you are at the center or whether you are at the surface.</div><div><br></div><div>It would be a pyramid if the circumferencial coordinate was measured in</div><div>distance units (e.g. in millimeters). But it's not, because by definition a</div><div>cylindrical transform uses an angular measure.</div><div><br></div><div> - David</div><div> </div><div> </div></div></div></div>