[vtkusers] [Insight-users] Get the selection point in screen (pixel) coordinates

[Xiaopeng Yang]

.Bold { font-weight: bold; }
.Title { font-weight: bold; font-size: 18px; color: #cc3300; }
.Code { border: #8b4513 1px solid; padding-right: 5px; padding-left: 5px;color: #000066; font-family: 'Courier New' , Monospace;background-color: #ff9933; }

Please help me. I really need your help!


--- Original Message ---


From : 
"Xiaopeng Yang"<yxp233 at postech.ac.kr>


To : 
<vtkusers at vtk.org>, <insight-users at itk.org>


Date : 
2010/11/29 월요일 오후 10:28:50


Subject : 
[Insight-users] Get the selection point in screen (pixel) coordinates





.Bold { font-weight: bold; }
.Title { font-weight: bold; font-size: 18px; color: #cc3300; }
.Code { border: #8b4513 1px solid; padding-right: 5px; padding-left: 5px;color: #000066; font-family: 'Courier New' , Monospace;background-color: #ff9933; }
Dear friends,



I applied vtkPointPicker to pick a point in screen (pixel) coordinates from a dataset. The data are a series of CT images. However, there are two problems: 1) the z value is always 0, no matter in which slice I pick a point; 2) the x and y values are different from other programs like MITK. I compared the values of the same point between my program and MITK. MITK shows that the z value changes according to which slice you are in to pick a point.



Here is my code:






double


 


std::cout <<


index[3];
this
->Interactor->GetPicker()->GetSelectionPoint(index);
"Index: "
 << index[0] << 
" "
 << index[1] << 
" "
 << index[2] << std::endl;













BODY{FONT-SIZE: 10pt;}
DIV, P {FONT-SIZE: 10pt;margin-top:2px;margin-bottom:2px;}
TD {FONT-SIZE: 10pt}



    

        

            
Ergonomic Design Technology Lab

            Dept. of Industrial and Management Engineering

            Pohang Univ. of Science and Technology

            South Korea

            Tel: 82-54-279-8246

            HP: 82-10-9794-0110

        

    





BODY{FONT-SIZE: 10pt;}
DIV, P {FONT-SIZE: 10pt;margin-top:2px;margin-bottom:2px;}
TD {FONT-SIZE: 10pt}




Ergonomic Design Technology Lab

Dept. of Industrial and Management Engineering

Pohang Univ. of Science and Technology

South Korea

Tel: 82-54-279-8246

HP: 82-10-9794-0110
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20101129/a120caa3/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vcard.vcf
Type: text/x-vcard
Size: 39 bytes
Desc: not available
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20101129/a120caa3/attachment.vcf>