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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkAlignImageDataSetFilter.h"
#include "vtkBoundingBox.h"
#include "vtkCompositeDataSet.h"
#include "vtkDummyController.h"
#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkLogger.h"
#include "vtkMultiProcessController.h"
#include "vtkObjectFactory.h"
#include "vtkSmartPointer.h"
#include "vtkVector.h"
namespace
{
vtkVector3d AllGather(const vtkVector3d& spacing, vtkMultiProcessController* controller)
{
vtkVector3d in(spacing);
vtkVector3d out = in;
controller->AllReduce(in.GetData(), out.GetData(), 3, vtkCommunicator::MAX_OP);
for (int cc = 0; cc < 3; ++cc)
{
in[cc] = (in[cc] == 0 || in[cc] == out[cc]) ? out[cc] : VTK_DOUBLE_MAX;
}
controller->AllReduce(in.GetData(), out.GetData(), 3, vtkCommunicator::MAX_OP);
return out;
}
bool IsSpacingValid(const vtkVector3d& spacing)
{
return spacing[0] < VTK_DOUBLE_MAX && spacing[1] < VTK_DOUBLE_MAX && spacing[2] < VTK_DOUBLE_MAX;
}
bool ComputeGlobalOrigin(vtkVector3d& origin, const std::vector<vtkImageData*>& images,
vtkMultiProcessController* controller, const int minimumExtent[3])
{
// First, confirm that spacing is compatible. All images must have the same
// spacing otherwise we cannot pick a valid global origin/extent.
vtkVector3d spacing =
images.empty() ? vtkVector3d(0.0) : vtkVector3d(images.front()->GetSpacing());
for (auto* image : images)
{
if (image->GetNumberOfPoints() > 0)
{
const vtkVector3d imgSpacing(image->GetSpacing());
if (spacing != imgSpacing)
{
spacing = vtkVector3d(VTK_DOUBLE_MAX);
}
}
}
vtkVector3d globalSpacing = AllGather(spacing, controller);
if (!IsSpacingValid(globalSpacing))
{
vtkLogF(ERROR, "Cannot determine acceptable global spacing.");
return false;
}
// Compute global bounds to determine the global image origin.
vtkBoundingBox bbox;
for (auto* image : images)
{
bbox.AddBounds(image->GetBounds());
}
vtkBoundingBox globalBounds;
controller->AllReduce(bbox, globalBounds);
globalBounds.GetMinPoint(origin.GetData());
// globalOrigin is based on the extent set at (0, 0, 0) right now. we need to adjust
// globalOrigin based on minimumExtent though.
for (int cc = 0; cc < 3; ++cc)
{
origin[cc] -= minimumExtent[cc] * spacing[cc];
}
return true;
}
}
VTK_ABI_NAMESPACE_BEGIN
vtkStandardNewMacro(vtkAlignImageDataSetFilter);
vtkCxxSetObjectMacro(vtkAlignImageDataSetFilter, Controller, vtkMultiProcessController);
//-----------------------------------------------------------------------------
vtkAlignImageDataSetFilter::vtkAlignImageDataSetFilter()
: Controller(nullptr)
, MinimumExtent{ 0, 0, 0 }
{
this->SetController(vtkMultiProcessController::GetGlobalController());
}
//-----------------------------------------------------------------------------
vtkAlignImageDataSetFilter::~vtkAlignImageDataSetFilter()
{
this->SetController(nullptr);
}
//-----------------------------------------------------------------------------
int vtkAlignImageDataSetFilter::FillInputPortInformation(int vtkNotUsed(port), vtkInformation* info)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkPartitionedDataSetCollection");
info->Append(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkPartitionedDataSet");
info->Append(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkMultiBlockDataSet");
return 1;
}
//------------------------------------------------------------------------------
int vtkAlignImageDataSetFilter::RequestData(
vtkInformation*, vtkInformationVector** inputVector, vtkInformationVector* outputVector)
{
auto outputCD = vtkCompositeDataSet::GetData(outputVector, 0);
outputCD->ShallowCopy(vtkDataObject::GetData(inputVector[0], 0));
auto images = vtkCompositeDataSet::GetDataSets<vtkImageData>(outputCD);
auto controller = this->GetController()
? vtk::MakeSmartPointer(this->GetController())
: vtk::TakeSmartPointer<vtkMultiProcessController>(vtkDummyController::New());
int countLocal = static_cast<int>(images.size());
int countGlobal = countLocal;
controller->AllReduce(&countLocal, &countGlobal, 1, vtkCommunicator::SUM_OP);
if (countGlobal == 0)
{
// no images present. nothing to do.
return 1;
}
// the origin that all output image datas will have
vtkVector3d globalOrigin(VTK_DOUBLE_MAX);
if (!::ComputeGlobalOrigin(globalOrigin, images, controller, this->MinimumExtent))
{
vtkErrorMacro("Failed to compute global origin.");
return 0;
}
int illalignedOrigins = 0;
// adjust image extents
for (auto* image : images)
{
if (image->GetNumberOfPoints() == 0)
{
continue;
}
const vtkVector3d imgOrigin(image->GetOrigin());
const vtkVector3d imgSpacing(image->GetSpacing());
// we know the relationship is:
// inputOrigin+inputExtent[any]*spacing=globalOrigin+outputExtent[any]*spacing
// remember that spacing is the same for input and output imagedatas
int outputExtent[6], inputExtent[6], dims[3];
image->GetExtent(inputExtent);
image->GetDimensions(dims);
for (int cc = 0; cc < 3; ++cc)
{
outputExtent[2 * cc] = static_cast<int>(
(imgOrigin[cc] + inputExtent[2 * cc] * imgSpacing[cc]) - globalOrigin[cc] / imgSpacing[cc]);
// we compute the max extent based on the imagedata extent to reduce
// the chance of round-off error that may change the number of
// points and cells in the imagedata
outputExtent[2 * cc + 1] = outputExtent[2 * cc] + dims[cc] - 1;
}
const vtkVector3d pt0(image->GetPoint(0));
image->SetOrigin(globalOrigin.GetData());
image->SetExtent(outputExtent);
const vtkVector3d newPt0(image->GetPoint(0));
if ((newPt0 - pt0).Norm() > 1e-10)
{
vtkLogF(ERROR,
"Global spacing (%f, %f, %f)/origin (%f, %f, %f) incompatible for image with first point "
"at (%f, %f, %f) by amount %f",
imgSpacing[0], imgSpacing[1], imgSpacing[2], globalOrigin[0], globalOrigin[1],
globalOrigin[2], pt0[0], pt0[1], pt0[2], (newPt0 - pt0).Norm());
illalignedOrigins = 1;
}
}
int illalignedOriginsGlobal = illalignedOrigins;
controller->AllReduce(&illalignedOrigins, &illalignedOriginsGlobal, 1, vtkCommunicator::MAX_OP);
return (illalignedOriginsGlobal == 1) ? 0 : 1;
}
//-----------------------------------------------------------------------------
void vtkAlignImageDataSetFilter::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Controller: " << this->Controller << endl;
os << indent << "MinimumExtent: " << this->MinimumExtent[0] << ", " << this->MinimumExtent[1]
<< ", " << this->MinimumExtent[2] << endl;
}
VTK_ABI_NAMESPACE_END
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