#include "../include/animorph/VertexGroup.h"
#include "../include/animorph/util.h"

using namespace std;
using namespace Animorph;

bool VertexGroup::load (const std::string& filename)
{
  FileReader file_reader;

  file_reader.open (filename);

  if (!file_reader)
    return false;

  fromStream (file_reader);

  return true;
}

void VertexGroup::fromStream (std::ifstream &in_stream)
{
  int vertex_number;
  float weight;
  string vgroup_ident;

  clear ();

  char buffer[MAX_LINE_BUFFER];
  while (in_stream.getline (buffer, MAX_LINE_BUFFER))
  {
    if (isalpha (buffer[0])) // line is a vgroup identifier
    {
      vgroup_ident = buffer;

      UtilStringDelSurround (vgroup_ident, "\n\r\t:");
    }
    else // line is a vgroup number
    {
      if (sscanf (buffer, "%d,%f\n", &vertex_number, &weight) == 2)
      {
        if (vgroup_ident != "")
        {
          VGroupData &vgd = (*this)[vgroup_ident];
          vgd[vertex_number] = weight;
        }
      }
      else
      {
        cerr << "illegal VertexGroup format line:" << endl << buffer << endl;
      }
    }
  }
}