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(vc_transform_mesh) Add the ability to load composite transforms #45

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Oct 27, 2023
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(vc_transform_mesh) Add the ability to load composite transforms #45

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69 changes: 38 additions & 31 deletions utils/src/TransformMesh.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -3,12 +3,12 @@
#include <boost/program_options.hpp>
#include <itkAffineTransform.h>
#include <itkCompositeTransform.h>
#include <itkTransformFileReader.h>
#include <itkTransformFileWriter.h>
#include <itkTransformMeshFilter.h>

#include "vc/core/filesystem.hpp"
#include "vc/core/io/OBJReader.hpp"
#include "vc/core/io/OBJWriter.hpp"
#include "vc/core/io/MeshIO.hpp"

namespace fs = volcart::filesystem;
namespace po = boost::program_options;
Expand All @@ -21,6 +21,7 @@ using CompositeTransform = itk::CompositeTransform<double, 3>;
using MeshTransformer =
itk::TransformMeshFilter<vc::ITKMesh, vc::ITKMesh, CompositeTransform>;
using TransformWriter = itk::TransformFileWriterTemplate<double>;
using TransformReader = itk::TransformFileReaderTemplate<double>;

int main(int argc, char** argv)
{
Expand All @@ -34,6 +35,7 @@ int main(int argc, char** argv)
"Input mesh file")
("output-mesh,o", po::value<std::string>()->required(),
"Output mesh file")
("input-tfm", po::value<std::string>(), "Input transformation file")
("output-tfm,t", po::value<std::string>(), "Output transformation file");

po::options_description transformOpts("Transformations");
Expand Down Expand Up @@ -69,52 +71,57 @@ int main(int argc, char** argv)
// Load mesh
std::cout << "Loading mesh..." << std::endl;
fs::path inputPath = parsed["input-mesh"].as<std::string>();
vc::io::OBJReader reader;
reader.setPath(inputPath);
auto mesh = reader.read();
auto meshGroup = vc::ReadMesh(inputPath);
auto mesh = meshGroup.mesh;

// Setup composite transform
auto compositeTrans = CompositeTransform::New();

// Build affine transform
auto affine = AffineTransform::New();

// Add translation
Displacement displacement;
displacement[0] = parsed["translate-x"].as<double>();
displacement[1] = parsed["translate-y"].as<double>();
displacement[2] = parsed["translate-z"].as<double>();
affine->Translate(displacement);
// Load transform
if (parsed.count("input-tfm") > 0) {
fs::path tfmPath = parsed["input-tfm"].as<std::string>();
auto readTfm = TransformReader::New();
readTfm->SetFileName(tfmPath.string());
readTfm->Update();
auto it = readTfm->GetTransformList()->begin();
auto* tfm = static_cast<CompositeTransform*>((*it).GetPointer());
compositeTrans->AddTransform(tfm);
}

// Add scale
auto precompose = parsed.count("scale-precompose") > 0;
affine->Scale(parsed["scale"].as<double>(), precompose);
// Build affine transform
else {
auto affine = AffineTransform::New();

// Add translation
Displacement displacement;
displacement[0] = parsed["translate-x"].as<double>();
displacement[1] = parsed["translate-y"].as<double>();
displacement[2] = parsed["translate-z"].as<double>();
affine->Translate(displacement);

// Add scale
auto precompose = parsed.count("scale-precompose") > 0;
affine->Scale(parsed["scale"].as<double>(), precompose);

// Build composite transform
compositeTrans->AddTransform(affine);
}

// Build composite transform
compositeTrans->AddTransform(affine);
// Simplify the transform
compositeTrans->FlattenTransformQueue();

// Apply the composite transform to the mesh
std::cout << "Applying transform..." << std::endl;
auto output = vc::ITKMesh::New();
auto transformer = MeshTransformer::New();
transformer->SetInput(mesh);
transformer->SetOutput(output);
transformer->SetTransform(compositeTrans);
transformer->Update();
auto output = transformer->GetOutput();

// Write the new mesh
std::cout << "Writing mesh..." << std::endl;
fs::path outputPath = parsed["output-mesh"].as<std::string>();
vc::io::OBJWriter writer;
writer.setPath(outputPath);
writer.setMesh(output);
try {
writer.setUVMap(reader.getUVMap());
writer.setTexture(reader.getTextureMat());
} catch (...) {
// Do nothing if there's no UV map or Texture image
}
writer.write();
vc::WriteMesh(outputPath, output, meshGroup.uv, meshGroup.texture);

///// Write the final transformations /////
if (parsed.count("output-tfm") > 0) {
Expand Down