[vtkusers] Normal vector of the surface of ellipstic cylinder

[Girish Lande]

Hi,

Please refer to attached program. I hope it helps.

On 27 July 2017 at 13:21, arwtyxouymz <arw.tyx-ouy_mz at ezweb.ne.jp> wrote:

>
> I want to make normal vector of the surface of ellipstic cylinder.
> To each surface point, I want to render normal vector, and get surface
> point.
> The current code is this.
>
> #include "vtkPoints.h"
> #include "vtkSmartPointer.h"
> #include "vtkLinearExtrusionFilter.h"
> #include "vtkDataSetMapper.h"
> #include "vtkPolyDataMapper.h"
> #include "vtkActor.h"
> #include "vtkProperty.h"
> #include "vtkCamera.h"
> #include "vtkRenderer.h"
> #include "vtkRenderWindow.h"
> #include "vtkRenderWindowInteractor.h"
> #include "vtkInteractorStyleTrackballCamera.h"
> #include "vtkPolyLine.h"
>
>
> int main(int argc, char *argv[])
> {
>
>     double angle = 0;
>     double r1, r2;
>     int id = 0;
>     int CenterX, CenterY;
>     r1 = 50;
>     r2 = 30;
>     CenterX = 0; CenterY = 0;
>
>     vtkSmartPointer<vtkPoints> points =
>             vtkSmartPointer<vtkPoints>::New();
>     points->SetNumberOfPoints(31);
>     while (angle <= 2.0 * vtkMath::Pi() + (vtkMath::Pi() / 360.0))
>     {
>         points->InsertPoint(id, r1 * cos(angle) + CenterX, r2 * sin(angle)
> +
> CenterY, 0);
>         angle = angle + (vtkMath::Pi() / 360.0);
>         id++;
>     }
>
>     vtkSmartPointer<vtkPolyLine> line =
>             vtkSmartPointer<vtkPolyLine>::New();
>     line->GetPointIds()->SetNumberOfIds(id);
>     for (int k = 0; k < id; ++k) {
>         line->GetPointIds()->SetId(k, k);
>     }
>
>     vtkSmartPointer<vtkCellArray> lines =
>             vtkSmartPointer<vtkCellArray>::New();
>     lines->InsertNextCell(line);
>
>     vtkSmartPointer<vtkPolyData> polyData =
>             vtkSmartPointer<vtkPolyData>::New();
>     polyData->GlobalReleaseDataFlagOff();
>     polyData->Allocate(1, 1);
>     polyData->SetPoints(points);
>     polyData->SetLines(lines);
>
>     vtkSmartPointer<vtkLinearExtrusionFilter> extrude =
>             vtkSmartPointer<vtkLinearExtrusionFilter>::New();
>     extrude->SetInputData(polyData);
>     extrude->SetExtrusionTypeToNormalExtrusion();
>     extrude->SetVector(0, 0, 100.0);
>     extrude->SetScaleFactor(0.5);
>     extrude->Update();
>
>     vtkSmartPointer<vtkPolyDataMapper> mapper =
>             vtkSmartPointer<vtkPolyDataMapper>::New();
>     mapper->SetInputConnection(extrude->GetOutputPort());
>
>     /*
>     vtkSmartPointer<vtkCylinderSource> cylinder =
>             vtkSmartPointer<vtkCylinderSource>::New();
>     cylinder->SetRadius(5.0);
>     cylinder->SetHeight(10.0);
>     cylinder->SetResolution(100);
>
>     vtkSmartPointer<vtkPolyDataMapper> mapper =
>             vtkSmartPointer<vtkPolyDataMapper>::New();
>     mapper->SetInputConnection(cylinder->GetOutputPort());
>     */
>
>     vtkSmartPointer<vtkActor> actor =
>             vtkSmartPointer<vtkActor>::New();
>     actor->SetMapper(mapper);
>     actor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);
>
>     vtkSmartPointer<vtkRenderer> ren =
>             vtkSmartPointer<vtkRenderer>::New();
>     ren->SetBackground(.4, .5, .7);
>     ren->AddActor(actor);
>
>
>     vtkSmartPointer<vtkRenderWindow> renWin =
>             vtkSmartPointer<vtkRenderWindow>::New();
>     renWin->AddRenderer(ren);
>     renWin->SetSize(600, 600);
>
>     vtkSmartPointer<vtkRenderWindowInteractor> iren =
>             vtkSmartPointer<vtkRenderWindowInteractor>::New();
>     iren->SetRenderWindow(renWin);
>
>     vtkSmartPointer<vtkInteractorStyleTrackballCamera> style =
>             vtkSmartPointer<vtkInteractorStyleTrackballCamera>::New();
>     iren->SetInteractorStyle(style);
>
>     renWin->Render();
>     iren->Initialize();
>     iren->Start();
>
>     return EXIT_SUCCESS;
> }
>
> please help me!
>
>
>
> --
> View this message in context: http://vtk.1045678.n5.nabble.
> com/Normal-vector-of-the-surface-of-ellipstic-cylinder-tp5744171.html
> Sent from the VTK - Users mailing list archive at Nabble.com.
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-- 
thanks & regards,
Girish

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