Processing(Java)で.plyファイル読み込み

// .plyファイル読み込み
class PLYLoader {
  int vertnum;
  float[] verts;
  int facenum;
  int[] indices;

  boolean load(String fn) {
    BufferedReader reader = createReader(fn);
    try {
      if (reader == null)  return false;
      if (!read_header(reader))  return false;
      if (!read_verts(reader))  return false;
      if (!read_faces(reader))  return false;
      return true;
    } catch (IOException e) {
      e.printStackTrace();
      return false;
    }
  }

  boolean read_header(BufferedReader reader) throws IOException {
    if (!reader.readLine().equals("ply"))  return false;
    if (match(reader.readLine(), "^format ascii [0-9\\.]+$") == null)  return false;
    for (;;) {
      String s = reader.readLine();
      if (s == null)  return false;
      if (s.equals("end_header"))  break;
      String[] m;
      if ((m = match(s, "^element vertex (\\d+)$")) != null) {
        vertnum = int(m[1]);
      } else if ((m = match(s, "^element face (\\d+)$")) != null) {
        facenum = int(m[1]);
      }
    }
    return vertnum > 0 && facenum > 0;
  }

  boolean read_verts(BufferedReader reader) throws IOException {
    verts = new float[vertnum * 3];  // xyz
    for (int i = 0; i < vertnum; ++i) {
      String[] a = split(reader.readLine(), " ");
      verts[i*3+0] = float(a[0]);
      verts[i*3+1] = float(a[1]);
      verts[i*3+2] = float(a[2]);
    }
    return true;
  }

  boolean read_faces(BufferedReader reader) throws IOException {
    ArrayList temp = new ArrayList();
    for (int i = 0; i < facenum; ++i) {
      String[] a = split(reader.readLine(), " ");
      int nvtx = int(a[0]);
      // 三角形に分割
      for (int j = 2; j < nvtx; ++j) {
        temp.add(int(a[1]));
        temp.add(int(a[j]));
        temp.add(int(a[j+1]));
      }
    }
    indices = new int[temp.size()];
    for (int i = 0; i < temp.size(); ++i)
      indices[i] = ((Integer)temp.get(i)).intValue();
    return true;
  }
}