// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause

#include "vtkXMLWriterC.h"

#define NPOINTS 8
#define NTIMESTEPS 8

int main()
{
  int i, j;
  {
    vtkXMLWriterC* writer = vtkXMLWriterC_New();
    const char filename[] = "cube.vtu";
    float points[3 * NPOINTS] = { 0, 0, 0, 1, 0, 0, 1, 1, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 0,
      1, 1 };
    vtkIdType cellarray[] = { 8, 0, 1, 2, 3, 4, 5, 6, 7 };
    float pointdata[NTIMESTEPS][NPOINTS];
    /* Give different values for the pointdata: */
    for (i = 0; i < NTIMESTEPS; i++)
    {
      for (j = 0; j < NPOINTS; j++)
      {
        pointdata[i][j] = (float)i;
      }
    }

    /* #define VTK_UNSTRUCTURED_GRID               4 */
    vtkXMLWriterC_SetDataObjectType(writer, 4);
    vtkXMLWriterC_SetFileName(writer, filename);
    /* #define VTK_FLOAT          10 */
    vtkXMLWriterC_SetPoints(writer, 10, points, NPOINTS);
    /* #define VTK_HEXAHEDRON    12 */
    vtkXMLWriterC_SetCellsWithType(writer, 12, 1, cellarray, 1 + NPOINTS);

    /* for all timesteps: */
    vtkXMLWriterC_SetNumberOfTimeSteps(writer, NTIMESTEPS);
    vtkXMLWriterC_Start(writer);
    for (i = 0; i < NTIMESTEPS; i++)
    {
      /* #define VTK_FLOAT          10 */
      vtkXMLWriterC_SetPointData(writer, "example data", 10, pointdata[i], NPOINTS, 1, "SCALARS");
      vtkXMLWriterC_WriteNextTimeStep(writer, i);
    }
    vtkXMLWriterC_Stop(writer);
    vtkXMLWriterC_Delete(writer);
  }
  return 0;
}
