/* Creates a new file handle with the given ID, which must be
unique among existing file identifiers. The new handle is
associated with a dataset file (initially empty). */
struct file_handle *
fh_create_dataset (struct dataset *ds)
{
const char *name;
struct file_handle *handle;
name = dataset_name (ds);
if (name[0] == '\0')
name = _("active dataset");
handle = create_handle (NULL, xstrdup (name), FH_REF_DATASET);
handle->ds = ds;
return handle;
}
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray*prhs[])
{
// Check for proper number of arguments
if (nrhs!=6)
{
mexErrMsgTxt("Six input argument required.");
}
else if (nlhs>1)
{
mexErrMsgTxt("Too many output arguments provided.");
}
// Get access to MATLAB data through C data types
double *vertices = mxGetPr(prhs[0]);
unsigned num_vertices = mxGetM(prhs[0]);
double *edges = mxGetPr(prhs[1]);
unsigned num_edges = mxGetM(prhs[1]);
double *radii = mxGetPr(prhs[2]);
unsigned num_radii_values = mxGetM(prhs[2]);
std::string dataset_name(mxArrayToString(prhs[3]));
double pixel_to_um = mxGetScalar(prhs[4]);
double radii_fudge_factor = mxGetScalar(prhs[5]);
if (num_vertices != num_radii_values)
{
mexErrMsgTxt("Number of radii values provided differs from the number of vertices specified.");
}
// Create the output variable that will store the edge lengths and radii required for one of the histograms
plhs[0] = mxCreateDoubleMatrix(num_edges, 2, mxREAL);
double *edge_length_radii = mxGetPr(plhs[0]);
// Create and fill a point container
vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
for (unsigned vertex=0; vertex<num_vertices; vertex++)
{
points->InsertNextPoint(acces_2d(vertices, vertex, 0, num_vertices) * pixel_to_um,
acces_2d(vertices, vertex, 1, num_vertices) * pixel_to_um,
0);
}
// Create a polydata object and add the points to it.
vtkSmartPointer<vtkPolyData> polydata = vtkSmartPointer<vtkPolyData>::New();
polydata->SetPoints(points);
// Create the array containing edge lengths
vtkSmartPointer<vtkDoubleArray> lengths_array = vtkSmartPointer<vtkDoubleArray>::New();
lengths_array->SetNumberOfComponents(1);
lengths_array->SetName("EdgeLengths");
// Allocate memory and add the definition of edges to the polydata object
polydata->Allocate();
vtkIdType edge_ends[2];
for (unsigned edge_id=0; edge_id<num_edges; edge_id++)
{
// The definition of edges comes from MATLAB and and the vertices are one-based indexed. Offset them.
edge_ends[0] = acces_2d(edges, edge_id, 0, num_edges) - 1;
edge_ends[1] = acces_2d(edges, edge_id, 1, num_edges) - 1;
polydata->InsertNextCell(VTK_LINE, 2, edge_ends);
double edge_length = DistanceTwoVertices(vertices, num_vertices, edge_ends) * pixel_to_um;
lengths_array->InsertNextValue(edge_length);
acces_2d(edge_length_radii, edge_id, 0, num_edges) = edge_length;
acces_2d(edge_length_radii, edge_id, 1, num_edges) = radii_fudge_factor * pixel_to_um * (radii[edge_ends[0]] + radii[edge_ends[1]])/2;
}
//polydata->GetCellData()->AddArray(lengths_array);
// Create and fill the array containing the plexus radii at each vertex.
vtkSmartPointer<vtkDoubleArray> radii_array = vtkSmartPointer<vtkDoubleArray>::New();
radii_array->SetNumberOfComponents(1);
radii_array->SetName("Radius");
for (unsigned vertex_id=0; vertex_id<num_vertices; vertex_id++)
{
radii_array->InsertNextValue(radii_fudge_factor * radii[vertex_id] * pixel_to_um);
}
polydata->GetPointData()->AddArray(radii_array);
polydata->GetPointData()->SetActiveScalars("Radius");
WritePolyDataToDisk(polydata, dataset_name + ".vtp");
}