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vtkPointHandleRepresentation2D.cxx
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vtkPointHandleRepresentation2D.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkPointHandleRepresentation2D.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkPointHandleRepresentation2D.h"
#include "vtkPolyDataMapper2D.h"
#include "vtkActor2D.h"
#include "vtkRenderer.h"
#include "vtkObjectFactory.h"
#include "vtkProperty2D.h"
#include "vtkAssemblyPath.h"
#include "vtkMath.h"
#include "vtkInteractorObserver.h"
#include "vtkLine.h"
#include "vtkCoordinate.h"
#include "vtkGlyph2D.h"
#include "vtkCursor2D.h"
#include "vtkPolyDataAlgorithm.h"
#include "vtkPoints.h"
#include "vtkWindow.h"
#include "vtkCamera.h"
#include "vtkPointPlacer.h"
vtkStandardNewMacro(vtkPointHandleRepresentation2D);
vtkCxxSetObjectMacro(vtkPointHandleRepresentation2D,Property,vtkProperty2D);
vtkCxxSetObjectMacro(vtkPointHandleRepresentation2D,SelectedProperty,vtkProperty2D);
vtkCxxSetObjectMacro(vtkPointHandleRepresentation2D,PointPlacer,vtkPointPlacer);
//----------------------------------------------------------------------
vtkPointHandleRepresentation2D::vtkPointHandleRepresentation2D()
{
// Initialize state
this->InteractionState = vtkHandleRepresentation::Outside;
// Represent the position of the cursor
this->FocalPoint = vtkPoints::New();
this->FocalPoint->SetNumberOfPoints(1);
this->FocalPoint->SetPoint(0, 0.0,0.0,0.0);
this->FocalData = vtkPolyData::New();
this->FocalData->SetPoints(this->FocalPoint);
// The transformation of the cursor will be done via vtkGlyph2D
// By default a vtkGlyphSOurce2D will be used to define the cursor shape
vtkCursor2D *cursor2D = vtkCursor2D::New();
cursor2D->AllOff();
cursor2D->AxesOn();
cursor2D->PointOn();
this->CursorShape = cursor2D->GetOutput();
this->CursorShape->Register(this);
cursor2D->Delete();
this->Glypher = vtkGlyph2D::New();
this->Glypher->SetInput(this->FocalData);
this->Glypher->SetSource(this->CursorShape);
this->Glypher->SetVectorModeToVectorRotationOff();
this->Glypher->ScalingOn();
this->Glypher->SetScaleModeToDataScalingOff();
this->Glypher->SetScaleFactor(1.0);
this->Mapper = vtkPolyDataMapper2D::New();
this->Mapper->SetInput(this->Glypher->GetOutput());
// Set up the initial properties
this->CreateDefaultProperties();
this->Actor = vtkActor2D::New();
this->Actor->SetMapper(this->Mapper);
this->Actor->SetProperty(this->Property);
// The size of the hot spot
this->WaitingForMotion = 0;
this->ConstraintAxis = -1;
}
//----------------------------------------------------------------------
vtkPointHandleRepresentation2D::~vtkPointHandleRepresentation2D()
{
this->FocalPoint->Delete();
this->FocalData->Delete();
this->CursorShape->Delete();
this->Glypher->Delete();
this->Mapper->Delete();
this->Actor->Delete();
this->Property->Delete();
this->SelectedProperty->Delete();
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::SetCursorShape(vtkPolyData *shape)
{
if ( shape != this->CursorShape )
{
if ( this->CursorShape )
{
this->CursorShape->Delete();
}
this->CursorShape = shape;
if ( this->CursorShape )
{
this->CursorShape->Register(this);
}
this->Glypher->SetSource(this->CursorShape);
this->Modified();
}
}
//----------------------------------------------------------------------
vtkPolyData *vtkPointHandleRepresentation2D::GetCursorShape()
{
return this->CursorShape;
}
//-------------------------------------------------------------------------
double* vtkPointHandleRepresentation2D::GetBounds()
{
return NULL;
}
//-------------------------------------------------------------------------
void vtkPointHandleRepresentation2D::SetDisplayPosition(double p[3])
{
this->Superclass::SetDisplayPosition(p);
this->FocalPoint->SetPoint(0, p);
this->FocalPoint->Modified();
double w[4];
if( this->Renderer )
{
vtkInteractorObserver::ComputeDisplayToWorld(
this->Renderer, p[0], p[1], p[2], w);
this->SetWorldPosition(w);
}
}
//-------------------------------------------------------------------------
int vtkPointHandleRepresentation2D::ComputeInteractionState(int X, int Y, int vtkNotUsed(modify))
{
double pos[3], xyz[3];
this->FocalPoint->GetPoint(0,pos);
xyz[0] = static_cast<double>(X);
xyz[1] = static_cast<double>(Y);
xyz[2] = pos[2];
this->VisibilityOn();
double tol2 = this->Tolerance * this->Tolerance;
if ( vtkMath::Distance2BetweenPoints(xyz,pos) <= tol2 )
{
this->InteractionState = vtkHandleRepresentation::Nearby;
}
else
{
this->InteractionState = vtkHandleRepresentation::Outside;
if ( this->ActiveRepresentation )
{
this->VisibilityOff();
}
}
return this->InteractionState;
}
//-------------------------------------------------------------------------
int vtkPointHandleRepresentation2D::DetermineConstraintAxis(int constraint,
double eventPos[2])
{
// Look for trivial cases: either not constrained or already constrained
if ( ! this->Constrained )
{
return -1;
}
else if ( constraint >= 0 && constraint < 3 )
{
return constraint;
}
// Okay, figure out constraint based on mouse motion
double dpos[2];
dpos[0] = fabs(eventPos[0] - this->StartEventPosition[0]);
dpos[1] = fabs(eventPos[1] - this->StartEventPosition[1]);
return (dpos[0]>dpos[1] ? 0 : 1);
}
//----------------------------------------------------------------------
// Record the current event position, and the rectilinear wipe position.
void vtkPointHandleRepresentation2D::StartWidgetInteraction(double startEventPos[2])
{
this->StartEventPosition[0] = startEventPos[0];
this->StartEventPosition[1] = startEventPos[1];
this->StartEventPosition[2] = 0.0;
this->LastEventPosition[0] = startEventPos[0];
this->LastEventPosition[1] = startEventPos[1];
this->ConstraintAxis = -1;
this->WaitCount = 0;
if ( this->Constrained )
{
this->WaitingForMotion = 1;
}
else
{
this->WaitingForMotion = 0;
}
}
//----------------------------------------------------------------------
// Based on the displacement vector (computed in display coordinates) and
// the cursor state (which corresponds to which part of the widget has been
// selected), the widget points are modified.
// First construct a local coordinate system based on the display coordinates
// of the widget.
void vtkPointHandleRepresentation2D::WidgetInteraction(double eventPos[2])
{
// Process the motion
if ( this->InteractionState == vtkHandleRepresentation::Selecting ||
this->InteractionState == vtkHandleRepresentation::Translating )
{
if ( !this->WaitingForMotion || this->WaitCount++ > 1 )
{
this->ConstraintAxis =
this->DetermineConstraintAxis(this->ConstraintAxis,eventPos);
this->Translate(eventPos);
}
}
else if ( this->InteractionState == vtkHandleRepresentation::Scaling )
{
this->Scale(eventPos);
}
// Book keeping
this->LastEventPosition[0] = eventPos[0];
this->LastEventPosition[1] = eventPos[1];
this->Modified();
}
//----------------------------------------------------------------------
// Translate everything
void vtkPointHandleRepresentation2D::Translate(double eventPos[2])
{
double pos[3], dpos[2];
this->FocalPoint->GetPoint(0,pos);
dpos[0] = eventPos[0] - pos[0];
dpos[1] = eventPos[1] - pos[1];
if ( this->ConstraintAxis >= 0 )
{
pos[this->ConstraintAxis] += dpos[this->ConstraintAxis];
}
else
{
pos[0] += dpos[0];
pos[1] += dpos[1];
}
this->SetDisplayPosition(pos);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::Scale(double eventPos[2])
{
// Get the current scale factor
double sf = this->Glypher->GetScaleFactor();
// Compute the scale factor
int *size = this->Renderer->GetSize();
double dPos = static_cast<double>(eventPos[1]-this->LastEventPosition[1]);
sf *= (1.0 + 2.0*(dPos / size[1])); //scale factor of 2.0 is arbitrary
// Scale the handle
this->Glypher->SetScaleFactor(sf);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::Highlight(int highlight)
{
if ( highlight )
{
this->Actor->SetProperty(this->SelectedProperty);
}
else
{
this->Actor->SetProperty(this->Property);
}
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::CreateDefaultProperties()
{
this->Property = vtkProperty2D::New();
this->Property->SetColor(1.0,1.0,1.0);
this->Property->SetLineWidth(0.5);
this->SelectedProperty = vtkProperty2D::New();
this->SelectedProperty->SetColor(0.0,1.0,0.0);
this->SelectedProperty->SetLineWidth(2.0);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::BuildRepresentation()
{
if ( this->GetMTime() > this->BuildTime ||
(this->Renderer && this->Renderer->GetActiveCamera() &&
this->Renderer->GetActiveCamera()->GetMTime() > this->BuildTime) ||
(this->Renderer && this->Renderer->GetVTKWindow() &&
this->Renderer->GetVTKWindow()->GetMTime() > this->BuildTime) )
{
double p[3];
this->GetDisplayPosition(p);
this->FocalPoint->SetPoint(0, p);
this->FocalPoint->Modified();
this->BuildTime.Modified();
}
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::ShallowCopy(vtkProp *prop)
{
vtkPointHandleRepresentation2D *rep =
vtkPointHandleRepresentation2D::SafeDownCast(prop);
if ( rep )
{
this->SetCursorShape(rep->GetCursorShape());
this->SetProperty(rep->GetProperty());
this->SetSelectedProperty(rep->GetSelectedProperty());
this->Actor->SetProperty(this->Property);
}
this->Superclass::ShallowCopy(prop);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::DeepCopy(vtkProp *prop)
{
vtkPointHandleRepresentation2D *rep =
vtkPointHandleRepresentation2D::SafeDownCast(prop);
if ( rep )
{
this->SetCursorShape(rep->GetCursorShape());
this->Property->DeepCopy(rep->GetProperty());
this->SelectedProperty->DeepCopy(rep->GetSelectedProperty());
this->Actor->SetProperty(this->Property);
}
this->Superclass::DeepCopy(prop);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::GetActors2D(vtkPropCollection *pc)
{
this->Actor->GetActors2D(pc);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::ReleaseGraphicsResources(vtkWindow *win)
{
this->Actor->ReleaseGraphicsResources(win);
}
//----------------------------------------------------------------------
int vtkPointHandleRepresentation2D::RenderOverlay(vtkViewport *viewport)
{
this->BuildRepresentation();
return this->Actor->RenderOverlay(viewport);
}
//----------------------------------------------------------------------
void vtkPointHandleRepresentation2D::PrintSelf(ostream& os, vtkIndent indent)
{
//Superclass typedef defined in vtkTypeMacro() found in vtkSetGet.h
this->Superclass::PrintSelf(os,indent);
if ( this->Property )
{
os << indent << "Property: " << this->Property << "\n";
}
else
{
os << indent << "Property: (none)\n";
}
if ( this->SelectedProperty )
{
os << indent << "Selected Property: " << this->SelectedProperty << "\n";
}
else
{
os << indent << "Selected Property: (none)\n";
}
if ( this->CursorShape )
{
os << indent << "Cursor Shape: " << this->CursorShape << "\n";
}
else
{
os << indent << "Cursor Shape: (none)\n";
}
}