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577 lines
17 KiB
C++
577 lines
17 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkSphereHandleRepresentation.cxx
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkSphereHandleRepresentation.h"
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#include "vtkSphereSource.h"
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#include "vtkPickingManager.h"
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#include "vtkPolyDataMapper.h"
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#include "vtkActor.h"
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#include "vtkCellPicker.h"
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#include "vtkRenderer.h"
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#include "vtkRenderWindowInteractor.h"
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#include "vtkObjectFactory.h"
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#include "vtkProperty.h"
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#include "vtkAssemblyPath.h"
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#include "vtkMath.h"
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#include "vtkInteractorObserver.h"
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#include "vtkLine.h"
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#include "vtkCoordinate.h"
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#include "vtkRenderWindow.h"
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vtkStandardNewMacro(vtkSphereHandleRepresentation);
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vtkCxxSetObjectMacro(vtkSphereHandleRepresentation,SelectedProperty,vtkProperty);
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//----------------------------------------------------------------------
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vtkSphereHandleRepresentation::vtkSphereHandleRepresentation()
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{
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// Initialize state
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this->InteractionState = vtkHandleRepresentation::Outside;
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// Represent the line
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this->Sphere = vtkSphereSource::New();
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this->Sphere->SetThetaResolution(16);
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this->Sphere->SetPhiResolution(8);
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this->Mapper = vtkPolyDataMapper::New();
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this->Mapper->SetInputConnection(this->Sphere->GetOutputPort());
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// Set up the initial properties
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this->CreateDefaultProperties();
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this->Actor = vtkActor::New();
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this->Actor->SetMapper(this->Mapper);
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this->Actor->SetProperty(this->Property);
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//Manage the picking stuff
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this->CursorPicker = vtkCellPicker::New();
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this->CursorPicker->PickFromListOn();
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this->CursorPicker->AddPickList(this->Actor);
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this->CursorPicker->SetTolerance(0.01); //need some fluff
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// Override superclass'
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this->PlaceFactor = 1.0;
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// The size of the hot spot
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this->HotSpotSize = 0.05;
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this->WaitingForMotion = 0;
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this->ConstraintAxis = -1;
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// Current handle size
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this->HandleSize = 15.0; //in pixels
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this->CurrentHandleSize = this->HandleSize;
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// Translation control
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this->TranslationMode = 1;
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}
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//----------------------------------------------------------------------
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vtkSphereHandleRepresentation::~vtkSphereHandleRepresentation()
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{
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this->Sphere->Delete();
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this->CursorPicker->Delete();
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this->Mapper->Delete();
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this->Actor->Delete();
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this->Property->Delete();
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this->SelectedProperty->Delete();
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::RegisterPickers()
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{
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this->Renderer->GetRenderWindow()->GetInteractor()->GetPickingManager()
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->AddPicker(this->CursorPicker, this);
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}
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//-------------------------------------------------------------------------
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void vtkSphereHandleRepresentation::PlaceWidget(double bds[6])
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{
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int i;
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double bounds[6], center[3];
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this->AdjustBounds(bds, bounds, center);
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// this->Sphere->SetModelBounds(bounds);
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this->SetWorldPosition(center);
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for (i=0; i<6; i++)
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{
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this->InitialBounds[i] = bounds[i];
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}
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this->InitialLength = sqrt((bounds[1]-bounds[0])*(bounds[1]-bounds[0]) +
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(bounds[3]-bounds[2])*(bounds[3]-bounds[2]) +
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(bounds[5]-bounds[4])*(bounds[5]-bounds[4]));
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}
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//-------------------------------------------------------------------------
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void vtkSphereHandleRepresentation::SetSphereRadius(double radius)
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{
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if(radius == this->Sphere->GetRadius())
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{
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return;
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}
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this->Sphere->SetRadius(radius);
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this->Modified();
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}
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//-------------------------------------------------------------------------
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double vtkSphereHandleRepresentation::GetSphereRadius()
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{
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return this->Sphere->GetRadius();
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}
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//-------------------------------------------------------------------------
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double* vtkSphereHandleRepresentation::GetBounds()
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{
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static double bounds[6];
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double center[3];
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double radius = this->Sphere->GetRadius();
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this->Sphere->GetCenter(center);
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bounds[0] = this->PlaceFactor*(center[0]-radius);
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bounds[1] = this->PlaceFactor*(center[0]+radius);
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bounds[2] = this->PlaceFactor*(center[1]-radius);
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bounds[3] = this->PlaceFactor*(center[1]+radius);
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bounds[4] = this->PlaceFactor*(center[2]-radius);
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bounds[5] = this->PlaceFactor*(center[2]+radius);
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return bounds;
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}
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//-------------------------------------------------------------------------
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void vtkSphereHandleRepresentation::SetWorldPosition(double p[3])
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{
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this->Sphere->SetCenter(p); //this may clamp the point
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this->Superclass::SetWorldPosition(this->Sphere->GetCenter());
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}
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//-------------------------------------------------------------------------
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void vtkSphereHandleRepresentation::SetDisplayPosition(double p[3])
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{
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this->Superclass::SetDisplayPosition(p);
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this->SetWorldPosition(this->WorldPosition->GetValue());
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}
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//-------------------------------------------------------------------------
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void vtkSphereHandleRepresentation::SetHandleSize(double size)
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{
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this->Superclass::SetHandleSize(size);
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this->CurrentHandleSize = this->HandleSize;
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}
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//-------------------------------------------------------------------------
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int vtkSphereHandleRepresentation::ComputeInteractionState(int X, int Y, int vtkNotUsed(modify))
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{
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this->VisibilityOn(); //actor must be on to be picked
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vtkAssemblyPath* path = this->GetAssemblyPath(X, Y, 0., this->CursorPicker);
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if ( path != NULL )
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{
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// this->InteractionState = vtkHandleRepresentation::Nearby;
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this->InteractionState = vtkHandleRepresentation::Selecting;
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}
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else
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{
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this->InteractionState = vtkHandleRepresentation::Outside;
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if ( this->ActiveRepresentation )
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{
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this->VisibilityOff();
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}
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}
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return this->InteractionState;
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}
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//-------------------------------------------------------------------------
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int vtkSphereHandleRepresentation::DetermineConstraintAxis(int constraint, double *x)
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{
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// Look for trivial cases
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if ( ! this->Constrained )
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{
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return -1;
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}
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else if ( constraint >= 0 && constraint < 3 )
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{
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return constraint;
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}
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// Okay, figure out constraint. First see if the choice is
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// outside the hot spot
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if ( ! this->WaitingForMotion )
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{
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double p[3], d2, tol;
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this->CursorPicker->GetPickPosition(p);
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d2 = vtkMath::Distance2BetweenPoints(p,this->StartEventPosition);
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tol = this->HotSpotSize*this->InitialLength;
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if ( d2 > (tol*tol) )
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{
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this->WaitingForMotion = 0;
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return this->CursorPicker->GetCellId();
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}
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else
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{
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this->WaitingForMotion = 1;
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this->WaitCount = 0;
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return -1;
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}
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}
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else if ( this->WaitingForMotion && x )
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{
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double v[3];
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this->WaitingForMotion = 0;
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v[0] = fabs(x[0] - this->StartEventPosition[0]);
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v[1] = fabs(x[1] - this->StartEventPosition[1]);
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v[2] = fabs(x[2] - this->StartEventPosition[2]);
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return ( v[0]>v[1] ? (v[0]>v[2]?0:2) : (v[1]>v[2]?1:2));
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}
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else
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{
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return -1;
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}
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}
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//----------------------------------------------------------------------
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// Record the current event position, and the rectilinear wipe position.
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void vtkSphereHandleRepresentation::StartWidgetInteraction(double startEventPos[2])
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{
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this->StartEventPosition[0] = startEventPos[0];
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this->StartEventPosition[1] = startEventPos[1];
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this->StartEventPosition[2] = 0.0;
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this->LastEventPosition[0] = startEventPos[0];
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this->LastEventPosition[1] = startEventPos[1];
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vtkAssemblyPath* path = this->GetAssemblyPath(
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startEventPos[0], startEventPos[1], 0., this->CursorPicker);
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if ( path != NULL )
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{
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// this->InteractionState = vtkHandleRepresentation::Nearby;
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this->InteractionState = vtkHandleRepresentation::Selecting;
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this->ConstraintAxis = this->DetermineConstraintAxis(-1,NULL);
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this->CursorPicker->GetPickPosition(this->LastPickPosition);
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}
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else
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{
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this->InteractionState = vtkHandleRepresentation::Outside;
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this->ConstraintAxis = -1;
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}
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}
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//----------------------------------------------------------------------
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// Based on the displacement vector (computed in display coordinates) and
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// the cursor state (which corresponds to which part of the widget has been
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// selected), the widget points are modified.
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// First construct a local coordinate system based on the display coordinates
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// of the widget.
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void vtkSphereHandleRepresentation::WidgetInteraction(double eventPos[2])
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{
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// Do different things depending on state
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// Calculations everybody does
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double focalPoint[4], pickPoint[4], prevPickPoint[4];
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double z;
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// Compute the two points defining the motion vector
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vtkInteractorObserver::ComputeWorldToDisplay(this->Renderer,
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this->LastPickPosition[0],
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this->LastPickPosition[1],
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this->LastPickPosition[2], focalPoint);
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z = focalPoint[2];
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vtkInteractorObserver::ComputeDisplayToWorld(this->Renderer, this->LastEventPosition[0],
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this->LastEventPosition[1], z, prevPickPoint);
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vtkInteractorObserver::ComputeDisplayToWorld(this->Renderer, eventPos[0], eventPos[1], z, pickPoint);
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// Process the motion
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if ( this->InteractionState == vtkHandleRepresentation::Selecting ||
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this->InteractionState == vtkHandleRepresentation::Translating )
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{
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if ( !this->WaitingForMotion || this->WaitCount++ > 3 )
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{
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this->ConstraintAxis =
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this->DetermineConstraintAxis(this->ConstraintAxis,pickPoint);
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if ( this->InteractionState == vtkHandleRepresentation::Selecting && !this->TranslationMode )
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{
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this->MoveFocus(prevPickPoint, pickPoint);
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}
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else
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{
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this->Translate(prevPickPoint, pickPoint);
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}
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}
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}
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else if ( this->InteractionState == vtkHandleRepresentation::Scaling )
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{
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this->Scale(prevPickPoint, pickPoint, eventPos);
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}
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// Book keeping
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this->LastEventPosition[0] = eventPos[0];
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this->LastEventPosition[1] = eventPos[1];
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this->Modified();
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::MoveFocus(double *p1, double *p2)
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{
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//Get the motion vector
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double v[3];
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v[0] = p2[0] - p1[0];
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v[1] = p2[1] - p1[1];
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v[2] = p2[2] - p1[2];
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double focus[3];
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this->Sphere->GetCenter(focus);
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if ( this->ConstraintAxis >= 0 )
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{
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focus[this->ConstraintAxis] += v[this->ConstraintAxis];
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}
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else
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{
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focus[0] += v[0];
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focus[1] += v[1];
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focus[2] += v[2];
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}
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this->SetWorldPosition(focus);
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}
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//----------------------------------------------------------------------
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// Translate everything
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void vtkSphereHandleRepresentation::Translate(double *p1, double *p2)
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{
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//Get the motion vector
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double v[3];
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v[0] = p2[0] - p1[0];
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v[1] = p2[1] - p1[1];
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v[2] = p2[2] - p1[2];
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double *pos = this->Sphere->GetCenter();
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double newFocus[3];
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if ( this->ConstraintAxis >= 0 )
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{//move along axis
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for (int i=0; i<3; i++)
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{
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if ( i != this->ConstraintAxis )
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{
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v[i] = 0.0;
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}
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}
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}
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for (int i=0; i<3; i++)
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{
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newFocus[i] = pos[i] + v[i];
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}
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this->SetWorldPosition(newFocus);
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double radius = this->SizeHandlesInPixels(1.0,newFocus);
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radius *= this->CurrentHandleSize / this->HandleSize;
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this->Sphere->SetRadius(radius);
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::SizeBounds()
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{
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double center[3];
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this->Sphere->GetCenter(center);
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double radius = this->SizeHandlesInPixels(1.0,center);
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radius *= this->CurrentHandleSize / this->HandleSize;
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this->Sphere->SetRadius(radius);
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::Scale(double *p1, double *p2, double eventPos[2])
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{
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//Get the motion vector
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double v[3];
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v[0] = p2[0] - p1[0];
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v[1] = p2[1] - p1[1];
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v[2] = p2[2] - p1[2];
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double *bounds = this->GetBounds();
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// Compute the scale factor
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double sf = vtkMath::Norm(v) /
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sqrt( (bounds[1]-bounds[0])*(bounds[1]-bounds[0]) +
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(bounds[3]-bounds[2])*(bounds[3]-bounds[2]) +
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(bounds[5]-bounds[4])*(bounds[5]-bounds[4]));
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if ( eventPos[1] > this->LastEventPosition[1] )
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{
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sf = 1.0 + sf;
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}
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else
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{
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sf = 1.0 - sf;
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}
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this->CurrentHandleSize *= sf;
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this->CurrentHandleSize = (this->CurrentHandleSize < 0.001 ? 0.001 : this->CurrentHandleSize);
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this->SizeBounds();
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::Highlight(int highlight)
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{
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if ( highlight )
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{
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this->Actor->SetProperty(this->SelectedProperty);
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}
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else
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{
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this->Actor->SetProperty(this->Property);
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}
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::CreateDefaultProperties()
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{
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this->Property = vtkProperty::New();
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this->Property->SetColor(1, 1, 1);
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this->SelectedProperty = vtkProperty::New();
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this->SelectedProperty->SetColor(0, 1, 0);
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::BuildRepresentation()
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{
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// The net effect is to resize the handle
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if ( this->GetMTime() > this->BuildTime ||
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(this->Renderer && this->Renderer->GetVTKWindow() &&
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this->Renderer->GetVTKWindow()->GetMTime() > this->BuildTime) )
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{
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if ( ! this->Placed )
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{
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this->ValidPick = 1;
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this->Placed = 1;
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}
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this->SizeBounds();
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this->Sphere->Update();
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this->BuildTime.Modified();
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}
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::ShallowCopy(vtkProp *prop)
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{
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vtkSphereHandleRepresentation *rep =
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vtkSphereHandleRepresentation::SafeDownCast(prop);
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if ( rep )
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{
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this->SetTranslationMode(rep->GetTranslationMode());
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this->SetProperty(rep->GetProperty());
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this->SetSelectedProperty(rep->GetSelectedProperty());
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this->SetHotSpotSize(rep->GetHotSpotSize());
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}
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this->Superclass::ShallowCopy(prop);
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::DeepCopy(vtkProp *prop)
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{
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vtkSphereHandleRepresentation *rep =
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vtkSphereHandleRepresentation::SafeDownCast(prop);
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if ( rep )
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{
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this->SetTranslationMode(rep->GetTranslationMode());
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this->Property->DeepCopy(rep->GetProperty());
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this->SelectedProperty->DeepCopy(rep->GetSelectedProperty());
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this->SetHotSpotSize(rep->GetHotSpotSize());
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}
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this->Superclass::DeepCopy(prop);
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::GetActors(vtkPropCollection *pc)
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{
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this->Actor->GetActors(pc);
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::ReleaseGraphicsResources(vtkWindow *win)
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{
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this->Actor->ReleaseGraphicsResources(win);
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}
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//----------------------------------------------------------------------
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int vtkSphereHandleRepresentation::RenderOpaqueGeometry(vtkViewport *viewport)
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{
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this->BuildRepresentation();
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return this->Actor->RenderOpaqueGeometry(viewport);
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}
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//----------------------------------------------------------------------
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int vtkSphereHandleRepresentation
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::RenderTranslucentPolygonalGeometry(vtkViewport *viewport)
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{
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this->BuildRepresentation();
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return this->Actor->RenderTranslucentPolygonalGeometry(viewport);
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}
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//-----------------------------------------------------------------------------
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int vtkSphereHandleRepresentation::HasTranslucentPolygonalGeometry()
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{
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return 0; //this->Actor->HasTranslucentPolygonalGeometry();
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::SetProperty(vtkProperty * p)
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{
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vtkSetObjectBodyMacro(Property, vtkProperty, p);
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if (p)
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{
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this->Actor->SetProperty( p );
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}
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}
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//----------------------------------------------------------------------
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void vtkSphereHandleRepresentation::PrintSelf(ostream& os, vtkIndent indent)
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{
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//Superclass typedef defined in vtkTypeMacro() found in vtkSetGet.h
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Hot Spot Size: " << this->HotSpotSize << "\n";
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if ( this->Property )
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{
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os << indent << "Property: " << this->Property << "\n";
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}
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else
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{
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os << indent << "Property: (none)\n";
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}
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if ( this->SelectedProperty )
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{
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os << indent << "Selected Property: " << this->SelectedProperty << "\n";
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}
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else
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{
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os << indent << "Selected Property: (none)\n";
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}
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os << indent << "Translation Mode: " << (this->TranslationMode ? "On\n" : "Off\n");
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os << indent << "Sphere: " << this->Sphere << "\n";
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this->Sphere->PrintSelf(os,indent.GetNextIndent());
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}
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