[vtkusers] Can not show points of STL file

[Wahyudin Permana]

Hi Mr. Jourdain,

I have try your suggestion:
vtkIdList cell = new vtkIdList();
        cell.SetNumberOfIds(STLPointData.size());
        for(i=0;i<STLPointData.size();i++) {
            cell.SetId(i,i);
        }
        polyData.InsertNextCell(2, cell);

but there are errors message and the program was terminated:


#
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x03874e6c, pid=3492, tid=3508
#
# JRE version: 6.0_20-b02
# Java VM: Java HotSpot(TM) Client VM (16.3-b01 mixed mode, sharing windows-x86 )
# Problematic frame:
# C  [vtkFiltering.dll+0x14e6c]
#
# An error report file with more information is saved as:
# F:\Data2\RP Software Development\Software Development\Gebe\hs_err_pid3492.log
#
# If you would like to submit a bug report, please visit:
#   http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Java Result: 1

do you have any suggestion?
thank you

============================================================

regards,

Wahyudin Permana

Phone:

Indonesia (Jakarta): +628151871130

Saudi Arabia (Riyadh): +966569143445

============================================================

--- On Tue, 7/6/10, Sebastien Jourdain <sebastien.jourdain at kitware.com> wrote:

From: Sebastien Jourdain <sebastien.jourdain at kitware.com>
Subject: Re: [vtkusers] Can not show points of STL file
To: "David E DeMarle" <dave.demarle at kitware.com>
Cc: "Wahyudin Permana" <gebe_top at yahoo.com>, vtkusers at vtk.org
Date: Tuesday, July 6, 2010, 12:44 AM

Or create a cell for each point (VTK_VERTEX (=1)) or 1 cell that refer to each point (VTK_POLY_VERTEX (=2)) on the polydata.

Something like that...

vtkIdList cell = new vtkIdList();
cell.SetNumberOfxx(STLPointData.size());

for(int i=0;i<STLPointData.size();i++) cell.SetId(i,i);
polyData.InsertNextCell(2,cell); // 2:VTK_POLY_VERTEX

I do not remember exactly the methods names, but you should be able to figure that out.

Seb




On Mon, Jul 5, 2010 at 11:43 AM, David E DeMarle <dave.demarle at kitware.com> wrote:

VTK renders cells not points.

Try using a glyph filter to create 1 VTK_VERTEX cell for every point.

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662



Phone: 518-371-3971 x109



On Mon, Jul 5, 2010 at 11:12 AM, Wahyudin Permana <gebe_top at yahoo.com> wrote:




Dear All,

I want to show points of STL file, but it doesn.t work, no error, but the points were not appear. 

any suggestion?


Code:
    STLPointData = new STLReading();
        STLPointData.readSTL(name);  // IMPORTANT: ONLYREAD STL ASCII FILE

        vtkPoints points = new vtkPoints();
        vtkPolyData polyData = new vtkPolyData();



        vtkUnstructuredGrid unstructuredGrid = new vtkUnstructuredGrid();

        int i = 0, j = 0, k = 0;
        int n;
        n = STLPointData.size();
       
 points.SetNumberOfPoints(n);
        System.out.println("Number of points= "+n);
        for(i=0;i<n;i++){
            double x = 0,y = 0,z = 0;
            //for(j=0;j<3;j++){
            //}



            x=(Double)((Vector)STLPointData.get(i)).get(0);
            y=(Double)((Vector)STLPointData.get(i)).get(1);
            z=(Double)((Vector)STLPointData.get(i)).get(2);
            points.InsertPoint(i, x, y,
 x);
            System.out.println("X= "+x+", Y= "+y+", Z= "+z);
        }

        vtkConeSource cone = new vtkConeSource();

        polyData.SetPoints(points);
        polyData.Squeeze();



        vtkPolyDataMapper mapper = new vtkPolyDataMapper();
        mapper.SetInput(polyData);
        //mapper.SetInput(cone.GetOutput());

        //unstructuredGrid.SetPoints(points);
        //vtkDataSetMapper dataMapper = new vtkDataSetMapper();



       
 //dataMapper.SetInput(unstructuredGrid);
        //dataMapper.SetInput(polyData);

        vtkActor stlActor = new vtkActor();
        vtkProperty property = new vtkProperty();
        property.SetColor(0.3, 0.8, 0.3);



        stlActor.SetMapper(mapper);
        //stlActor.SetMapper(dataMapper);
        stlActor.SetProperty(property);

        vtkRenderer ren2; //= new vtkRenderer();
        ren2 = renWin2.GetRenderer();



        ren2.AddActor(stlActor);
        ren2.SetBackground(0.1, 0.1,
 0.8);
        
        ren2.ResetCameraClippingRange();
        ren2.ResetCamera();

        ren2.Render();


thank you

============================================================

regards,

Wahyudin Permana

Phone:

Indonesia (Jakarta): +628151871130

Saudi Arabia (Riyadh): +966569143445

============================================================


      
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