<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 12 (filtered medium)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><span style='color:#1F497D'>I’ve noticed the problem when I
pick on a text actor (i.e. the label corresponding to the point). It will give
me a different node and that node’s corresponding scalar.</span><span
style='color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>William
E Lucarell<br>
<b>Sent:</b> Tuesday, April 08, 2008 11:22 AM<br>
<b>To:</b> 'VTK_question'<br>
<b>Subject:</b> [vtkusers] Problem with vtkPointPicker<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have a 2D mesh with my vtkPointPicker and sometimes the
point showing up doesn’t correspond to a point on/near where my mouse is when I
hit “p”. Below is my code:<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
renWin.addWindowSetObserver(new Observer() {<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
@Override<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
public void update(Observable o, Object arg) {<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
// Create a point picker<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
pickerPoint = new vtkPointPicker();<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
// Now at the end of the pick event call the above
function.<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
pickerPoint.AddObserver("EndPickEvent",
MeshCreator.this, "annotatePick");<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
renWin.getIren().SetPicker(pickerPoint);<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
// Initially pick the cell at this location.<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
pickerPoint.Pick(0, 0, 0, renWin.GetRenderer());<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
});<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-family:"Courier New"'><o:p> </o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
public void annotatePick() {<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
if (pickerPoint.GetPointId() < 0) { }<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
else {<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
pickerInfo.setText(format.format(TestMesh.GetPointData().GetScalars().GetTuple1(pickerPoint.GetPointId())));<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
nodeInfo.setText(Integer.toString(pickerPoint.GetPointId()));<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal style='margin-left:.5in'><span style='font-family:"Courier New"'>
}<o:p></o:p></span></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I get another node or sometimes a node that doesn’t even
exist. Is there a bug in the vtkPointPicker?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><b><i><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";
color:#00337F'>Bill Lucarell</span></i></b><span style='font-size:12.0pt;
font-family:"Times New Roman","serif";color:navy'><o:p></o:p></span></p>
</div>
</body>
</html>