/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) 1998-2007 by Systems in Motion.  All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  ("GPL") version 2 as published by the Free Software Foundation.
 *  See the file LICENSE.GPL at the root directory of this source
 *  distribution for additional information about the GNU GPL.
 *
 *  For using Coin with software that can not be combined with the GNU
 *  GPL, and for taking advantage of the additional benefits of our
 *  support services, please contact Systems in Motion about acquiring
 *  a Coin Professional Edition License.
 *
 *  See http://www.coin3d.org/ for more information.
 *
 *  Systems in Motion, Postboks 1283, Pirsenteret, 7462 Trondheim, NORWAY.
 *  http://www.sim.no/  sales@sim.no  coin-support@coin3d.org
 *
\**************************************************************************/

( const SoGLCoordinateElement * coords,
  const SbVec3f *normals,
  SoMaterialBundle * mb,
  const SoTextureCoordinateBundle * tb,
  int nbind,
  int mbind,
  int doTextures,
  int32_t idx,
  const int32_t *ptr,
  const int32_t *end,
  SbBool needNormals,
  SbBool drawPoints)
{
  const SbVec3f * coords3d = NULL;
  const SbVec4f * coords4d = NULL;
  const SbBool is3d = coords->is3D();
  if (is3d) {
    coords3d = coords->getArrayPtr3();
  }
  else {
    coords4d = coords->getArrayPtr4();
  }

  // This is the same code as in SoGLCoordinateElement::send().
  // It is inlined here for speed (~15% speed increase).
#define SEND_VERTEX(_idx_) \
  if (is3d) glVertex3fv((const GLfloat*) (coords3d + _idx_)); \
  else glVertex4fv((const GLfloat*) (coords4d + _idx_));

  SbVec3f dummynormal(0.0f, 0.0f, 1.0f);
  const SbVec3f * currnormal = &dummynormal;
  if (normals) currnormal = normals;
#if NBINDING==OVERALL
  if (needNormals)
    glNormal3fv((const GLfloat *)currnormal);
#endif

  int matnr = 0;
  int texnr = 0;

#if NBINDING==PER_SEGMENT || MBINDING==PER_SEGMENT

  if (drawPoints) glBegin(GL_POINTS);
  else glBegin(GL_LINES);

  while (ptr < end) {
    int n = *ptr++;
    if (n < 2) {
      idx += n;
      continue;
    }
#if MBINDING==PER_LINE || MBINDING==PER_VERTEX
    mb->send(matnr++, TRUE);
#endif
#if NBINDING==PER_LINE || NBINDING==PER_VERTEX
    currnormal = normals++;
    glNormal3fv((const GLfloat*)currnormal);
#endif
#if TEXTURES==TRUE
    tb->send(texnr++, coords->get3(idx), *currnormal);
#endif
    while (--n) {
#if MBINDING==PER_SEGMENT
      mb->send(matnr++, TRUE);
#endif
#if NBINDING==PER_SEGMENT
      currnormal = normals++;
      glNormal3fv((const GLfloat*)currnormal);
#endif
      SEND_VERTEX(idx);
      idx++;

#if NBINDING==PER_VERTEX
      currnormal = normals++;
      glNormal3fv((const GLfloat *)currnormal);
#endif
#if MBINDING==PER_VERTEX
      mb->send(matnr++, TRUE);
#endif
#if TEXTURES==TRUE
      tb->send(texnr++, coords->get3(idx), *currnormal);
#endif
      SEND_VERTEX(idx);
    }
    idx++;
  }
  glEnd();

#else // NBINDING==PER_SEGMENT || MBINDING==PER_SEGMENT

  if (drawPoints) glBegin(GL_POINTS);
  while (ptr < end) {
    int n = *ptr++;
    if (n < 2) {
      idx += n; // FIXME: is this correct?
      continue;
    }
    n -= 2;
    if (!drawPoints) glBegin(GL_LINE_STRIP);
#if NBINDING != OVERALL
    currnormal = normals++;
    glNormal3fv((const GLfloat *)currnormal);
#endif
#if MBINDING != OVERALL
    mb->send(matnr++, TRUE);
#endif
#if TEXTURES==TRUE
    tb->send(texnr++, coords->get3(idx), *currnormal);
#endif
    SEND_VERTEX(idx);
    idx++;
    do {
#if NBINDING==PER_VERTEX
      currnormal = normals++;
      glNormal3fv((const GLfloat *)currnormal);
#endif
#if MBINDING==PER_VERTEX
      mb->send(matnr++, TRUE);
#endif
#if TEXTURES==TRUE
      tb->send(texnr++, coords->get3(idx), *currnormal);
#endif
      SEND_VERTEX(idx);
      idx++;
    } while (n--);
    if (!drawPoints) glEnd();
  }

#endif // NBINDING==PER_SEGMENT || MBINDING==PER_SEGMENT

  if (drawPoints) glEnd();
}

#undef SEND_VERTEX