Re: Visualizing normal vectors

Dear Andaharoo,

Thank you very much for recommendations. My code works successfully and it
runs quite fast. 
I have one more question. Is it possible to set width of arrows? I can scale
it using SetScaleFactor(). I tried SetTipLength and SetTipRadius but
dimensions did not change. 
Thanks in advance

#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkArrowSource.h>
#include <vtkGlyph3D.h>
#include <vtkPointSource.h>
# include "vtkGlyph3DMapper.h"
#include <vtkOpenGLGlyph3DMapper.h>
#include <vector>


int main(int argc, char* argv[])
{
	vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
	reader->SetFileName("dene_sil.xyz");
	reader->DetectNumericColumnsOn();
	reader->SetFieldDelimiterCharacters(" ");
	reader->Update();

	vtkTable* table = reader->GetOutput();
	vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
	vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
	normals->SetName("NORMALS");
	normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

	std::cout << "Table has " << table->GetNumberOfRows()
		<< " rows." << std::endl;
	std::cout << "Table has " << table->GetNumberOfColumns()
		<< " columns." << std::endl;

	for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
	{

		points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
			(table->GetValue(i, 1)).ToDouble(),
			(table->GetValue(i, 2)).ToDouble());

		double n[3];
		n[0] = (table->GetValue(i, 3)).ToDouble();
		n[1] = (table->GetValue(i, 4)).ToDouble();
		n[2] = (table->GetValue(i, 5)).ToDouble();
		normals->InsertNextTuple(n);
	}

	std::cout << "There are " << points->GetNumberOfPoints()
		<< " points." << std::endl;

	vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
	polydata->SetPoints(points);
	//polydata->GetPointData()->SetNormals(normals);
	polydata->GetPointData()->AddArray(normals);

	vtkSmartPointer<vtkOpenGLGlyph3DMapper> Glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
	Glyph3D->SetInputData(polydata);

	double pp[3];
	polydata->GetPoint(1, pp);
	std::cout << "deneme = " << 1 << " : (" << pp[0] << " " << pp[1] << " " <<
pp[2] << ")" << std::endl;
	
	std::cout << "There are " << polydata->GetPointData()->GetNumberOfArrays()
<< " arrays." << std::endl;
	std::cout << "name: " << polydata->GetPointData()->GetArrayName(0) <<
std::endl;
	
	vtkSmartPointer<vtkArrowSource> glyphSource =
vtkSmartPointer<vtkArrowSource>::New();
	glyphSource->Update();
	//glyphSource->SetTipResolution(5);
	glyphSource->SetTipLength(0.01);
	glyphSource->SetTipRadius(0.01);
	
	vtkSmartPointer<vtkActor> glyph3DActor = vtkSmartPointer<vtkActor>::New();
	glyph3DActor->SetMapper(Glyph3D);
	glyph3DActor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);
	glyph3DActor->GetProperty()->SetLineWidth(0.01);

	Glyph3D->SetSourceData(glyphSource->GetOutput());
	Glyph3D->OrientOn();
	Glyph3D->SetOrientationArray("NORMALS");
	Glyph3D->SetScaleFactor(0.03);
	Glyph3D->Update();
	
	vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
	renderWindow->AddRenderer(renderer);
	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderer->AddActor(glyph3DActor);
	renderer->SetBackground(.5, .5, .5);
	renderWindow->Render();
	renderWindowInteractor->Start();
	return EXIT_SUCCESS;
}




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