Hi Seb,<br> I have a 3D box with the dimensions (0 200,0 200, 0 200) rendered through a class inherited from vtkCanvas. My requirement is to pick a point from the mouse click and display a sphere at that point. I am checking about the vtkPointPicker.<br>
And I am using the following code to pick the point. It is not giving the correct position. Is there any mistake in what I am doing.<br><br>@Override<br>public void mousePressed(MouseEvent e)<br> {<br> vtkPointPicker picker = new vtkPointPicker();<br>
picker.SetTolerance(0.01);<br> int result = picker.Pick(e.getX(), e.getY(), 0.0, this.GetRenderer());<br><br> double[] pick;<br> if(result!=0)<br> pick = picker.GetPickPosition();<br>
<br> System.out.println(pick[0] + " " + pick[1]+ " " + pick[2]);<br> sphereActor.SetPosition(pick[0],pick[1],pick[2]);<br> this.GetRenderer().AddActor(sphereActor);<br>}<br><br>Thanks for your time<br>
<br>-Satya.<br><div class="gmail_quote"><br>On Mon, Jun 11, 2012 at 1:16 PM, Sebastien Jourdain <span dir="ltr"><<a href="mailto:sebastien.jourdain@kitware.com" target="_blank">sebastien.jourdain@kitware.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I don't know what should be the Z value, but I guess that depend what<br>
you try to achieve.<br>
<br>
Seb<br>
<br>
On Mon, Jun 11, 2012 at 11:58 AM, satyanarayana reddy<br>
<div class="HOEnZb"><div class="h5"><<a href="mailto:satyajanga@gmail.com">satyajanga@gmail.com</a>> wrote:<br>
> Hi Seb,<br>
> Thank you for the reply. what should be the value of Z?<br>
><br>
> -Satya.<br>
><br>
><br>
> On Mon, Jun 11, 2012 at 11:56 AM, Sebastien Jourdain<br>
> <<a href="mailto:sebastien.jourdain@kitware.com">sebastien.jourdain@kitware.com</a>> wrote:<br>
>><br>
>> I guess it's because you said that the point is at z=0 so the z will<br>
>> still be wrong after your convert ion. On the other hand, point and<br>
>> cell picker do work in Java as I remember doing it a while ago.<br>
>> By default its the "p" key that you need to hit to trigger the picking...<br>
>><br>
>> On Mon, Jun 11, 2012 at 11:36 AM, satyanarayana reddy<br>
>> <<a href="mailto:satyajanga@gmail.com">satyajanga@gmail.com</a>> wrote:<br>
>> ><br>
>> ><br>
>> > Dear vtkusers,<br>
>> > I have a requirement in which I need to select a point( by<br>
>> > mouse<br>
>> > click) in Cube. I am not using vtkPointPicker/vtkCellPicker as they does<br>
>> > not<br>
>> > seem to compatible in Java.<br>
>> > I am creating a class which extends vtkCanvas to render the cube and I<br>
>> > am<br>
>> > overriding the mouse listeners in vtkCanvas to pick the event position<br>
>> > and<br>
>> > converting it to World Coordinates using the following code as I am not<br>
>> > sure<br>
>> > how to use the static methods in vtkInteractorObserver(in Java wrapped<br>
>> > vtk),<br>
>> ><br>
>> > double[] GetDisplayToWorldCoordinates(double x, double y)<br>
>> > {<br>
>> > /* x,y represent the event position*/<br>
>> > double[] coordinates = new double[3];<br>
>> > coordinates[0]=(double)x;<br>
>> > coordinates[1]=(double)y;<br>
>> > coordinates[2]=0;<br>
>> > double[] worldCord = new double[3];<br>
>> ><br>
>> > this.GetRenderer().SetDisplayPoint(coordinates);<br>
>> > this.GetRenderer().DisplayToView();<br>
>> > this.GetRenderer().ViewToWorld();<br>
>> > worldCord= this.GetRenderer().GetWorldPoint();<br>
>> ><br>
>> > return worldCord;<br>
>> > }<br>
>> ><br>
>> ><br>
>> > My box source is (0,200,0,200,0,200). But the worldCord returned from<br>
>> > the<br>
>> > function is not what I expected. They are not even coming in the<br>
>> > extent.<br>
>> ><br>
>> > Please check If I am doing anything wrong. Or suggest how to convert the<br>
>> > event position in object coordinate system.<br>
>> ><br>
>> ><br>
>> > Thanks in advance,<br>
>> ><br>
>> > Best Regards,<br>
>> > Satya.<br>
>> ><br>
>> ><br>
>> ><br>
>> ><br>
><br>
><br>
</div></div></blockquote></div><br>