[vtkusers] Drawing objects interactively in VTK..??

[Rakesh Patil]

 Yes..I did try that at the very beginning... Not only this but i tried out the various combination of the coordinates.. none of them matched for me... :)vtkImageTracerWidget is performing the task what i want.. but it needs a prop beneath it.... and for me, it is with or without prop object.. wither ways it should be possible for me to draw...Any suggestions..??ThanksRegardsRakesh Patil Original message From:Darshan Pai< darshanpai at gmail.com >Date: 08 Apr 10 04:55:02Subject:Re: [vtkusers] Drawing objects interactively in VTK..??To: Rakesh Patil replied too fast . The displaytoview() and viewToWorld does not take points as input.But you can use the vtkCoordinate . Try this particular snippet of code.vtkCamera *camera = renderer>GetActiveCamera(); double *n = new double[2];n = camera>GetClippingRange(); vtkSmartPointer coordinate = vtkSmartPointer::New();coordinate>SetCoordinateSystemToDisplay(); coordinate>SetValue(x,y);// display coordinatesdouble *pt = new double[3];pt = co
 ordinate>GetComputedWorldValue(renderer);coutdoing is at every left button down event, i get the mouse position and store> it is a vector list. Later using this points am displaying on the rendering> window.>> But when i do this, i noticed the following:>>The mouse position values are totally different from the the points which> are displayed.. I mean, i click at one location, and it is displayed at far> end another location..>> I tried changing the coordinate system also.. Still the result is> unchanged..>> Any suggestions how it is to be done..??>> Thanks> Rakesh Patil>Sounds like you may need a coordinate system conversion in there somewhere, check out:http://vtk.org/Wiki/VTK/Examples/CoordinateIt also sounds like you are trying to duplicate already working code in:http://vtk.org/Wiki/VTK/Examples/Widgets/ImageTracerWidgetThanks,David Get Yourself a cool, short @in.com Email ID now!  Powered by www.kitware.comVisit other Kitware opensource projects at http://www.kitware.c
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