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vtkCameraActor.cxx
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vtkCameraActor.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkCameraActor.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 "vtkCameraActor.h"
#include "vtkActor.h"
#include "vtkPolyDataMapper.h"
#include "vtkFrustumSource.h"
#include "vtkCamera.h"
#include "vtkPlanes.h"
#include "vtkProperty.h"
#include "vtkObjectFactory.h"
#include "vtkMath.h"
vtkStandardNewMacro(vtkCameraActor);
vtkCxxSetObjectMacro(vtkCameraActor, Camera, vtkCamera);
// ----------------------------------------------------------------------------
vtkCameraActor::vtkCameraActor()
{
this->Camera=0;
this->WidthByHeightRatio=1.0;
this->FrustumSource=0;
this->FrustumMapper=0;
this->FrustumActor=0;
}
// ----------------------------------------------------------------------------
vtkCameraActor::~vtkCameraActor()
{
this->SetCamera(0);
if(this->FrustumActor!=0)
{
this->FrustumActor->Delete();
}
if(this->FrustumMapper!=0)
{
this->FrustumMapper->Delete();
}
if(this->FrustumSource!=0)
{
this->FrustumSource->Delete();
}
}
// ----------------------------------------------------------------------------
// Description:
// Support the standard render methods.
int vtkCameraActor::RenderOpaqueGeometry(vtkViewport *viewport)
{
this->UpdateViewProps();
int result=0;
if(this->FrustumActor!=0 && this->FrustumActor->GetMapper()!=0)
{
result=this->FrustumActor->RenderOpaqueGeometry(viewport);
}
return result;
}
// ----------------------------------------------------------------------------
// Description:
// Does this prop have some translucent polygonal geometry? No.
int vtkCameraActor::HasTranslucentPolygonalGeometry()
{
return false;
}
//-----------------------------------------------------------------------------
void vtkCameraActor::ReleaseGraphicsResources(vtkWindow *window)
{
if(this->FrustumActor!=0)
{
this->FrustumActor->ReleaseGraphicsResources(window);
}
}
//-------------------------------------------------------------------------
// Get the bounds for this Actor as (Xmin,Xmax,Ymin,Ymax,Zmin,Zmax).
double *vtkCameraActor::GetBounds()
{
// we cannot initialize the Bounds the same way vtkBoundingBox does because
// vtkProp3D::GetLength() does not check if the Bounds are initialized or
// not and makes a call to sqrt(). This call to sqrt with invalid values
// would raise a floating-point overflow exception (notably on BCC).
// As vtkMath::UninitializeBounds initialized finite unvalid bounds, it
// passes silently and GetLength() returns 0.
vtkMath::UninitializeBounds(this->Bounds);
this->UpdateViewProps();
if(this->FrustumActor!=0 && this->FrustumActor->GetUseBounds())
{
this->FrustumActor->GetBounds(this->Bounds);
}
return this->Bounds;
}
//-------------------------------------------------------------------------
vtkMTimeType vtkCameraActor::GetMTime()
{
vtkMTimeType mTime=this->Superclass::GetMTime();
if(this->Camera!=0)
{
vtkMTimeType time;
time = this->Camera->GetMTime();
if(time>mTime)
{
mTime=time;
}
}
return mTime;
}
// ----------------------------------------------------------------------------
// Description:
// Get property of the internal actor.
vtkProperty *vtkCameraActor::GetProperty()
{
if(this->FrustumActor==0)
{
this->FrustumActor=vtkActor::New();
}
return this->FrustumActor->GetProperty();
}
// ----------------------------------------------------------------------------
// Description:
// Set property of the internal actor.
void vtkCameraActor::SetProperty(vtkProperty *p)
{
if(this->FrustumActor==0)
{
this->FrustumActor=vtkActor::New();
}
this->FrustumActor->SetProperty(p);
}
// ----------------------------------------------------------------------------
void vtkCameraActor::UpdateViewProps()
{
if(this->Camera==0)
{
vtkDebugMacro(<< "no camera to represent.");
return;
}
vtkPlanes *planes=0;
if(this->FrustumSource==0)
{
this->FrustumSource=vtkFrustumSource::New();
planes=vtkPlanes::New();
this->FrustumSource->SetPlanes(planes);
planes->Delete();
}
else
{
planes=this->FrustumSource->GetPlanes();
}
double coefs[24];
this->Camera->GetFrustumPlanes(this->WidthByHeightRatio,coefs);
planes->SetFrustumPlanes(coefs);
this->FrustumSource->SetShowLines(false);
if(this->FrustumMapper==0)
{
this->FrustumMapper=vtkPolyDataMapper::New();
}
this->FrustumMapper->SetInputConnection(
this->FrustumSource->GetOutputPort());
if(this->FrustumActor==0)
{
this->FrustumActor=vtkActor::New();
}
this->FrustumActor->SetMapper(this->FrustumMapper);
vtkProperty *p=this->FrustumActor->GetProperty();
p->SetRepresentationToWireframe();
this->FrustumActor->SetVisibility(1);
}
//-------------------------------------------------------------------------
void vtkCameraActor::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Camera: ";
if(this->Camera==0)
{
os << "(none)" << endl;
}
else
{
this->Camera->PrintSelf(os,indent);
}
os << indent << "WidthByHeightRatio: " << this->WidthByHeightRatio << endl;
}