fltTransformGeneralMatrix.cxx

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/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file fltTransformGeneralMatrix.cxx
 * @author drose
 * @date 2000-08-24
 */

#include "fltTransformGeneralMatrix.h"
#include "fltRecordReader.h"
#include "fltRecordWriter.h"

TypeHandle FltTransformGeneralMatrix::_type_handle;

/**
 *
 */
FltTransformGeneralMatrix::
FltTransformGeneralMatrix(FltHeader *header) : FltTransformRecord(header) {
}

/**
 * Directly sets the general matrix.
 */
void FltTransformGeneralMatrix::
set_matrix(const LMatrix4d &matrix) {
  _matrix = matrix;
}

/**
 * Directly sets the general matrix.
 */
void FltTransformGeneralMatrix::
set_matrix(const LMatrix4f &matrix) {
  _matrix = LCAST(double, matrix);
}

/**
 * Fills in the information in this record based on the information given in
 * the indicated datagram, whose opcode has already been read.  Returns true
 * on success, false if the datagram is invalid.
 */
bool FltTransformGeneralMatrix::
extract_record(FltRecordReader &reader) {
  if (!FltTransformRecord::extract_record(reader)) {
    return false;
  }

  nassertr(reader.get_opcode() == FO_general_matrix, false);
  DatagramIterator &iterator = reader.get_iterator();

  for (int r = 0; r < 4; r++) {
    for (int c = 0; c < 4; c++) {
      _matrix(r, c) = iterator.get_be_float32();
    }
  }

  check_remaining_size(iterator);
  return true;
}

/**
 * Fills up the current record on the FltRecordWriter with data for this
 * record, but does not advance the writer.  Returns true on success, false if
 * there is some error.
 */
bool FltTransformGeneralMatrix::
build_record(FltRecordWriter &writer) const {
  if (!FltTransformRecord::build_record(writer)) {
    return false;
  }

  writer.set_opcode(FO_general_matrix);
  Datagram &datagram = writer.update_datagram();

  for (int r = 0; r < 4; r++) {
    for (int c = 0; c < 4; c++) {
      datagram.add_be_float32(_matrix(r, c));
    }
  }

  return true;
}