[vtkusers] Arrow Problem

[ankitramani]

I am using this code for displaying arrow on screen not arrow source. then i
combine arrows, cylinder and line in assembly. 
******************************************************    
        vtkPolyData *pd1 = vtkPolyData::New();
	vtkCellArray *ca1 = vtkCellArray::New();
	vtkPoints *pts1 = vtkPoints::New();
	pts1->InsertNextPoint(0, 1, 0);
	pts1->InsertNextPoint(8, 1, 0);
	pts1->InsertNextPoint(8, 2, 0);
	pts1->InsertNextPoint(10, 0, 0);
	pts1->InsertNextPoint(8, -2, 0);
	pts1->InsertNextPoint(8, -1, 0);
	pts1->InsertNextPoint(0, -1, 0);
	ca1->InsertNextCell(7);
	ca1->InsertCellPoint(0);
	ca1->InsertCellPoint(1);
	ca1->InsertCellPoint(2);
	ca1->InsertCellPoint(3);
	ca1->InsertCellPoint(4);
	ca1->InsertCellPoint(5);
	ca1->InsertCellPoint(6);
	pd1->SetPoints(pts1);
	pd1->SetPolys(ca1);

	/*vtkPolyData *pd21 = vtkPolyData::New();
	vtkCellArray *ca21 = vtkCellArray::New();
	vtkPoints *pts21 = vtkPoints::New();
	pts21->InsertNextPoint(0, 1, 0);
	pts21->InsertNextPoint(8, 1, 0);
	pts21->InsertNextPoint(8, 2, 0);
	pts21->InsertNextPoint(10, 0.01, 0);
	ca21->InsertNextCell(4);
	ca21->InsertCellPoint(0);
	ca21->InsertCellPoint(1);
	ca21->InsertCellPoint(2);
	ca21->InsertCellPoint(3);
	pd21->SetPoints(pts21);
	pd21->SetLines(ca21);*/

	vtkImplicitModeller *arrowIM1 = vtkImplicitModeller::New();
	arrowIM1->SetInput(pd1);
	arrowIM1->SetSampleDimensions(50, 20, 8);

	vtkContourFilter *arrowCF1 = vtkContourFilter::New();
	arrowCF1->SetInput((vtkDataObject*)arrowIM1->GetOutput());
	arrowCF1->SetValue(0, 0.2);

	vtkWarpTo *arrowWT1 = vtkWarpTo::New();
	arrowWT1->SetInput(arrowCF1->GetOutput());
	arrowWT1->SetPosition(5, 0, 5);
	arrowWT1->SetScaleFactor(0.85);
	arrowWT1->AbsoluteOn();

	vtkTransform *arrowT1 = vtkTransform::New();
	arrowT1->RotateY(60);
	arrowT1->Translate(-1.33198, 0, -1.479);
	arrowT1->Scale(5, 5, 5);

	vtkTransformFilter *arrowTF1 = vtkTransformFilter::New();
	arrowTF1->SetInput(arrowWT1->GetOutput());
	arrowTF1->SetTransform(arrowT1);

	vtkDataSetMapper *arrowMapper1 = vtkDataSetMapper::New();
	arrowMapper1->SetInput(arrowTF1->GetOutput());
	arrowMapper1->ScalarVisibilityOff();

	// draw the azimuth arrows
	vtkLODActor *a1Actor1 = vtkLODActor::New();
	a1Actor1->SetMapper(arrowMapper1);
	a1Actor1->SetPosition(400, 300, 50);
	a1Actor1->RotateZ(90);
	a1Actor1->GetProperty()->SetColor(0.3,1, 0.3);
	a1Actor1->GetProperty()->SetSpecularColor(1,1, 1);
	a1Actor1->GetProperty()->SetSpecular(0.3);
	a1Actor1->GetProperty()->SetSpecularPower(20);
	a1Actor1->GetProperty()->SetAmbient(0.2);
	a1Actor1->GetProperty()->SetDiffuse(0.8);

	vtkLODActor *a2Actor1 = vtkLODActor::New();
	a2Actor1->SetMapper(arrowMapper1);
	a2Actor1->RotateX(180);
	a2Actor1->RotateZ(-90);
	a2Actor1->SetPosition(400, 300, 50);
	a2Actor1->GetProperty()->SetColor(0.3,1, 0.3);
	a2Actor1->GetProperty()->SetSpecularColor(1,1, 1);
	a2Actor1->GetProperty()->SetSpecular(0.3);
	a2Actor1->GetProperty()->SetSpecularPower(20);
	a2Actor1->GetProperty()->SetAmbient(0.2);
	a2Actor1->GetProperty()->SetDiffuse(0.8);
*****************************************************************
this code for picking the arrow and when i click on arrow, it translate in
xyz axis.
**************************************************************
if (event == vtkCommand::LeftButtonPressEvent)
	{
		int currPos[3];
		interactor->GetEventPosition(currPos);
		vtkPropPicker *picker=vtkPropPicker::New();
	        interactor->SetPicker(picker);
	 	picker->Pick(currPos[0], currPos[1], currPos[2],  this->renderer3D);
					
         	vtkSmartPointer<vtkPropCollection> collection1 =
vtkSmartPointer<vtkPropCollection>::New();
		collection1 =
interactor->GetPicker()->GetRenderer()->GetPickResultProps();
					
		if(collection1)
		{
		collection1->InitTraversal();
		for (int i = 1; i < collection1->GetNumberOfItems(); i++)
		{
       	vtkActor *actor =vtkActor::SafeDownCast(collection1->GetNextProp());				
			if(actor == tempArr51Actor)
			{
				double *pos = tempImpAssembly->GetPosition();
				tempImpAssembly->SetPosition(pos[0]-10,pos[1],pos[2]);
			}
***********************************
assembly should translate when i click on arrow(any area of arrow)
but it should only work, when i click on end part(tail) of arrow. 
i know, i miss some stupid thing in my code.
help me.
thnx in advance..


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