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vtkAMRVolumeMapper.cxx
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vtkAMRVolumeMapper.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkAMRVolumeMapper.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 "vtkAMRVolumeMapper.h"
#include "vtkAMRResampleFilter.h"
#include "vtkBoundingBox.h"
#include "vtkCamera.h"
#include "vtkCompositeDataPipeline.h"
#include "vtkDataSet.h"
#include "vtkExecutive.h"
#include "vtkObjectFactory.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkMath.h"
#include "vtkOverlappingAMR.h"
#include "vtkMatrix4x4.h"
#include "vtkMultiBlockDataSet.h"
#include "vtkMultiThreader.h"
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkSmartVolumeMapper.h"
#include "vtkUniformGrid.h"
#include "vtkTimerLog.h"
#include "vtkNew.h"
vtkStandardNewMacro( vtkAMRVolumeMapper );
// Construct a vtkAMRVolumeMapper
//----------------------------------------------------------------------------
vtkAMRVolumeMapper::vtkAMRVolumeMapper()
{
this->InternalMapper = vtkSmartVolumeMapper::New();
this->Resampler = vtkAMRResampleFilter::New();
this->HasMetaData = false;
this->Resampler->SetDemandDrivenMode(0);
this->Grid = NULL;
this->NumberOfSamples[0] = 128;
this->NumberOfSamples[1] = 128;
this->NumberOfSamples[2] = 128;
this->RequestedResamplingMode = 0; // Frustrum Mode
this->FreezeFocalPoint = false;
this->LastFocalPointPosition[0] =
this->LastFocalPointPosition[1] =
this->LastFocalPointPosition[2] = 0.0;
// Set the camera position to focal point distance to
// something that would indicate an initial update is needed
this->LastPostionFPDistance = -1.0;
this->ResamplerUpdateTolerance = 10e-8;
this->GridNeedsToBeUpdated = true;
this->UseDefaultThreading = false;
vtkMath::UninitializeBounds(this->Bounds);
}
//----------------------------------------------------------------------------
vtkAMRVolumeMapper::~vtkAMRVolumeMapper()
{
this->InternalMapper->Delete();
this->InternalMapper = NULL;
this->Resampler->Delete();
this->Resampler = NULL;
if (this->Grid)
{
this->Grid->Delete();
this->Grid = NULL;
}
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetInputData(vtkImageData* vtkNotUsed(genericInput))
{
vtkErrorMacro("Mapper expects a hierarchical dataset as input" );
this->Resampler->SetInputConnection(0, 0);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetInputData(vtkDataSet* vtkNotUsed(genericInput))
{
vtkErrorMacro("Mapper expects a hierarchical dataset as input" );
this->Resampler->SetInputConnection(0, 0);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetInputData(vtkOverlappingAMR *hdata)
{
this->SetInputDataInternal(0,hdata);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetInputConnection (int port, vtkAlgorithmOutput *input)
{
if ((this->Resampler->GetNumberOfInputConnections(0) > 0)
&& (this->Resampler->GetInputConnection(port,0) == input))
{
return;
}
this->Resampler->SetInputConnection(port, input);
this->vtkVolumeMapper::SetInputConnection(port, input);
if (this->Grid)
{
this->Grid->Delete();
this->Grid = NULL;
}
}
//----------------------------------------------------------------------------
double *vtkAMRVolumeMapper::GetBounds()
{
vtkOverlappingAMR*hdata;
hdata =
vtkOverlappingAMR::SafeDownCast
(this->Resampler->GetInputDataObject(0,0));
if (!hdata)
{
vtkMath::UninitializeBounds(this->Bounds);
}
else
{
hdata->GetBounds(this->Bounds);
}
return this->Bounds;
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::FillInputPortInformation(
int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkOverlappingAMR");
return 1;
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SelectScalarArray(int arrayNum)
{
this->InternalMapper->SelectScalarArray(arrayNum);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SelectScalarArray(const char *arrayName)
{
this->InternalMapper->SelectScalarArray(arrayName);
}
//----------------------------------------------------------------------------
const char *vtkAMRVolumeMapper::GetScalarModeAsString()
{
return this->InternalMapper->GetScalarModeAsString();
}
//----------------------------------------------------------------------------
char *vtkAMRVolumeMapper::GetArrayName()
{
return this->InternalMapper->GetArrayName();
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetArrayId()
{
return this->InternalMapper->GetArrayId();
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetArrayAccessMode()
{
return this->InternalMapper->GetArrayAccessMode();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetScalarMode(int mode)
{
this->vtkVolumeMapper::SetScalarMode(mode);
// for the internal mapper we need to convert all cell based
// modes to point based since this is what the resample filter is doing
int newMode = mode;
if (mode == VTK_SCALAR_MODE_USE_CELL_DATA)
{
newMode = VTK_SCALAR_MODE_USE_POINT_DATA;
}
else if (mode == VTK_SCALAR_MODE_USE_CELL_FIELD_DATA)
{
newMode = VTK_SCALAR_MODE_USE_POINT_FIELD_DATA;
}
this->InternalMapper->SetScalarMode(newMode);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetBlendMode(int mode)
{
this->InternalMapper->SetBlendMode(mode);
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetBlendMode()
{
return this->InternalMapper->GetBlendMode();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetCropping(int mode)
{
this->InternalMapper->SetCropping(mode);
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetCropping()
{
return this->InternalMapper->GetCropping();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetCroppingRegionFlags(int mode)
{
this->InternalMapper->SetCroppingRegionFlags(mode);
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetCroppingRegionFlags()
{
return this->InternalMapper->GetCroppingRegionFlags();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetCroppingRegionPlanes(double arg1, double arg2,
double arg3, double arg4,
double arg5, double arg6)
{
this->InternalMapper->SetCroppingRegionPlanes(arg1, arg2, arg3,
arg4, arg5, arg6);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::GetCroppingRegionPlanes(double *planes)
{
this->InternalMapper->GetCroppingRegionPlanes(planes);
}
//----------------------------------------------------------------------------
double *vtkAMRVolumeMapper::GetCroppingRegionPlanes()
{
return this->InternalMapper->GetCroppingRegionPlanes();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetRequestedRenderMode(int mode)
{
this->InternalMapper->SetRequestedRenderMode(mode);
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetRequestedRenderMode()
{
return this->InternalMapper->GetRequestedRenderMode();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::SetInterpolationMode(int mode)
{
this->InternalMapper->SetInterpolationMode(mode);
}
//----------------------------------------------------------------------------
int vtkAMRVolumeMapper::GetInterpolationMode()
{
return this->InternalMapper->GetInterpolationMode();
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::ReleaseGraphicsResources(vtkWindow *window)
{
this->InternalMapper->ReleaseGraphicsResources(window);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::Render(vtkRenderer *ren, vtkVolume *vol)
{
// Hack - Make sure the camera is in the right mode for moving the focal point
ren->GetActiveCamera()->SetFreezeFocalPoint(this->FreezeFocalPoint);
// If there is no grid initially we need to see if we can create one
// The grid is not created if it is an interactive render; meaning the desired
// time is less than the previous time to draw
if (!(this->Grid && (1.0 / ren->GetRenderWindow()->GetDesiredUpdateRate()
< this->InternalMapper->GetTimeToDraw())))
{
if (!this->HasMetaData)
{
// If there is no meta data then the resample filter has not been updated
// with the proper frustrun bounds else it would have been done when
// processing request information
this->UpdateResampler(ren, NULL);
}
if (this->GridNeedsToBeUpdated)
{
this->UpdateGrid();
}
if (this->Grid == NULL)
{
// Could not create a grid
return;
}
this->InternalMapper->SetInputData(this->Grid);
}
// Enable threading for the internal volume renderer and the reset the
// original value when done - need when running inside of ParaView
if (this->UseDefaultThreading)
{
int maxNumThreads = vtkMultiThreader::GetGlobalMaximumNumberOfThreads();
vtkMultiThreader::SetGlobalMaximumNumberOfThreads(0);
this->InternalMapper->Render(ren, vol);
vtkMultiThreader::SetGlobalMaximumNumberOfThreads(maxNumThreads);
}
else
{
this->InternalMapper->Render(ren, vol);
}
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::UpdateResampler(vtkRenderer *ren, vtkOverlappingAMR *amr)
{
// Set the bias of the resample filter to be the projection direction
double bvec[3];
vtkCamera *cam = ren->GetActiveCamera();
double d, d2, fp[3], pd, gb[6];
d = cam->GetDistance();
cam->GetFocalPoint(fp);
if (this->Grid)
{
// Compare distances with the grid's bounds
this->Grid->GetBounds(gb);
vtkBoundingBox bbox(gb);
double maxL = bbox.GetMaxLength();
// If the grid's max length is 0 then we need to update
if (maxL > 0.0)
{
pd = fabs(d - this->LastPostionFPDistance) / this->LastPostionFPDistance;
if ((this->LastPostionFPDistance > 0.0) && (pd <= this->ResamplerUpdateTolerance))
{
// Lets see if the focal point has not moved enough to cause an update
d2 = vtkMath::Distance2BetweenPoints(fp, this->LastFocalPointPosition)/(maxL*maxL);
if (d2 <= (this->ResamplerUpdateTolerance * this->ResamplerUpdateTolerance))
{
// nothing needs to be updated
return;
}
else
{
// int oops = 1;
}
}
}
}
cam->GetDirectionOfProjection(bvec);
this->Resampler->SetBiasVector(bvec);
this->Resampler->SetUseBiasVector(true);
this->LastPostionFPDistance = d;
this->LastFocalPointPosition[0] = fp[0];
this->LastFocalPointPosition[1] = fp[1];
this->LastFocalPointPosition[2] = fp[2];
if (this->RequestedResamplingMode == 0)
{
this->UpdateResamplerFrustrumMethod(ren, amr);
}
else
{
// This is the focal point approach where we
// center the grid on the focal point and set its length
// to be the distance between the camera and its focal point
double p[3];
p[0] = fp[0] - d;
p[1] = fp[1] - d;
p[2] = fp[2] - d;
// Now set the min/max of the resample filter
this->Resampler->SetMin(p);
p[0] = fp[0] + d;
p[1] = fp[1] + d;
p[2] = fp[2] + d;
this->Resampler->SetMax(p);
this->Resampler->SetNumberOfSamples(this->NumberOfSamples);
}
// The grid may have changed
this->GridNeedsToBeUpdated = true;
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::UpdateResamplerFrustrumMethod(vtkRenderer *ren,
vtkOverlappingAMR *amr)
{
double bounds[6];
// If we have been passed a valid amr then assume this is the proper
// meta data to use
if (amr)
{
amr->GetBounds(bounds);
}
else
{
// Make sure the bounds are up to date
this->GetBounds(bounds);
}
double computed_bounds[6];
if (vtkAMRVolumeMapper::ComputeResamplerBoundsFrustumMethod(
ren->GetActiveCamera(), ren, bounds, computed_bounds))
{
vtkBoundingBox bbox(computed_bounds);
// Now set the min/max of the resample filter
this->Resampler->SetMin( const_cast< double* >(bbox.GetMinPoint()) );
this->Resampler->SetMax( const_cast< double* >(bbox.GetMaxPoint()) );
this->Resampler->SetNumberOfSamples(this->NumberOfSamples);
}
}
//----------------------------------------------------------------------------
bool vtkAMRVolumeMapper::ComputeResamplerBoundsFrustumMethod(
vtkCamera* camera, vtkRenderer* renderer,
const double bounds[6], double out_bounds[6])
{
vtkMath::UninitializeBounds(out_bounds);
// First we need to create a bouding box that represents the visible region
// of the camera in World Coordinates
// In order to produce as tight of bounding box as possible we need to determine
// the z range in view coordinates of the data and then project that part
// of the view volume back into world coordinates
// We would just use the renderer's WorldToView and ViewToWorld methods but those
// implementations are not efficient for example ViewToWorld would do 8
// matrix inverse ops when all we really need to do is one
// Get the camera transformation
vtkMatrix4x4 *matrix = camera->GetCompositeProjectionTransformMatrix(
renderer->GetTiledAspectRatio(), 0, 1);
int i, j, k;
double pnt[4], tpnt[4];
vtkBoundingBox bbox;
pnt[3] = 1.0;
for (i = 0; i < 2; i++)
{
pnt[0] = bounds[i];
for (j = 2; j < 4; j++)
{
pnt[1] = bounds[j];
for (k = 4; k < 6; k++)
{
pnt[2] = bounds[k];
matrix->MultiplyPoint(pnt, tpnt);
if (tpnt[3])
{
bbox.AddPoint(tpnt[0]/tpnt[3],
tpnt[1]/tpnt[3], tpnt[2]/tpnt[3]);
}
else
{
vtkGenericWarningMacro("UpdateResampler: Found an Ideal Point going to VC!");
}
}
}
}
double zRange[2];
if (bbox.IsValid())
{
zRange[0] = bbox.GetMinPoint()[2];
zRange[1] = bbox.GetMaxPoint()[2];
// Normalize the z values to make sure they are between -1 and 1
for (i = 0; i < 2; i++)
{
if (zRange[i] < -1.0)
{
zRange[i] = -1.0;
}
else if (zRange[i] > 1.0)
{
zRange[i] = 1.0;
}
}
}
else
{
// Since we could not find a valid bounding box assume that the
// zrange is -1 to 1
zRange[0] = -1.0;
zRange[1] = 1.0;
}
// Now that we have the z range of the data in View Coordinates lets
// convert that part of the View Volume back into World Coordinates
double mat[16];
//Need the inverse
vtkMatrix4x4::Invert(*matrix->Element, mat);
bbox.Reset();
// Compute the bounding box
for (i = -1; i < 2; i+=2)
{
pnt[0] = i;
for (j = -1; j < 2; j+=2)
{
pnt[1] = j;
for (k = 0; k < 2; k++)
{
pnt[2] = zRange[k];
vtkMatrix4x4::MultiplyPoint(mat,pnt,tpnt);
if (tpnt[3])
{
bbox.AddPoint(tpnt[0]/tpnt[3],
tpnt[1]/tpnt[3], tpnt[2]/tpnt[3]);
}
else
{
vtkGenericWarningMacro("UpdateResampler: Found an Ideal Point going to WC!");
}
}
}
}
// Check to see if the box is valid
if (!bbox.IsValid())
{
return false; // There is nothing we can do
}
bbox.GetBounds(out_bounds);
return true;
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::UpdateGrid()
{
// This is for debugging
#define PRINTSTATS 0
#if PRINTSTATS
vtkNew<vtkTimerLog> timer;
int gridDim[3];
double gridOrigin[3];
timer->StartTimer();
#endif
this->Resampler->Update();
#if PRINTSTATS
timer->StopTimer();
std::cerr << "Resample Time:" << timer->GetElapsedTime() << " ";
std::cerr << "New Bounds: [" << bbox.GetMinPoint()[0]
<< ", " << bbox.GetMaxPoint()[0] << "], ["
<< bbox.GetMinPoint()[1]
<< ", " << bbox.GetMaxPoint()[1] << "], ["
<< bbox.GetMinPoint()[2]
<< ", " << bbox.GetMaxPoint()[2] << "\n";
#endif
vtkMultiBlockDataSet *mb = this->Resampler->GetOutput();
if (!mb)
{
return;
}
unsigned int nb = mb->GetNumberOfBlocks();
if (!nb)
{
// No new grid was created
return;
}
if (nb != 1)
{
vtkErrorMacro("UpdateGrid: Resampler created more than 1 Grid!");
}
if (this->Grid)
{
this->Grid->Delete();
}
this->Grid = vtkUniformGrid::SafeDownCast(mb->GetBlock(0));
this->Grid->Register(0);
this->GridNeedsToBeUpdated = false;
#if PRINTSTATS
this->Grid->GetDimensions(gridDim);
this->Grid->GetOrigin(gridOrigin);
std::cerr << "Grid Dimenions: (" << gridDim[0] << ", " << gridDim[1] << ", "
<< gridDim[2]
<< ") Origin:(" << gridOrigin[0] << ", "<< gridOrigin[1] << ", "
<< gridOrigin[2] << ")\n";
#endif
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::ProcessUpdateExtentRequest(vtkRenderer *vtkNotUsed(ren),
vtkInformation*info,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
this->Resampler->RequestUpdateExtent(info, inputVector, outputVector);
}
//----------------------------------------------------------------------------
void vtkAMRVolumeMapper::ProcessInformationRequest(vtkRenderer *ren,
vtkInformation*info,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
vtkInformation *input = inputVector[0]->GetInformationObject( 0 );
if (!(input && input->Has(vtkCompositeDataPipeline::COMPOSITE_DATA_META_DATA())))
{
this->HasMetaData = false;
this->Resampler->SetDemandDrivenMode(0);
return;
}
if (!this->HasMetaData)
{
this->HasMetaData = true;
this->Resampler->SetDemandDrivenMode(1);
}
vtkOverlappingAMR *amrMetaData =
vtkOverlappingAMR::SafeDownCast(
input->Get(vtkCompositeDataPipeline::COMPOSITE_DATA_META_DATA()) );
this->UpdateResampler(ren, amrMetaData);
this->Resampler->RequestInformation(info, inputVector, outputVector);
}
//----------------------------------------------------------------------------
// Print the vtkAMRVolumeMapper
void vtkAMRVolumeMapper::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "ScalarMode: " << this->GetScalarModeAsString() << endl;
if ( this->ScalarMode == VTK_SCALAR_MODE_USE_POINT_FIELD_DATA ||
this->ScalarMode == VTK_SCALAR_MODE_USE_CELL_FIELD_DATA )
{
if (this->ArrayAccessMode == VTK_GET_ARRAY_BY_ID)
{
os << indent << "ArrayId: " << this->ArrayId << endl;
}
else
{
os << indent << "ArrayName: " << this->ArrayName << endl;
}
}
os << indent << "UseDefaultThreading:" << this->UseDefaultThreading << "\n";
os << indent << "ResampledUpdateTolerance: " <<
this->ResamplerUpdateTolerance << "\n";
os << indent << "NumberOfSamples: ";
for( int i=0; i < 3; ++i )
{
os << this->NumberOfSamples[ i ] << " ";
}
os << std::endl;
os << indent << "RequestedResamplingMode: " <<
this->RequestedResamplingMode << "\n";
os << indent << "FreezeFocalPoint: " << this->FreezeFocalPoint << "\n";
}
//----------------------------------------------------------------------------