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OpenGl_indexpolygons.c

/***********************************************************************

     FONCTION :
     ----------
        File OpenGl_indexpolygons :
 

     REMARQUES:
     ---------- 
      
      Le culling et le backfacing ne marchent pas.


     HISTORIQUE DES MODIFICATIONS   :
     --------------------------------
       xx-xx-xx : xxx ; Creation.
       11-03-96 : FMN ; Correction warning compilation
       01-04-96 : CAL ; Integration MINSK portage WNT
       09-08-96 : FMN ; Suppression appel glMatrixMode() avant glGetFloatv()
       21-10-96 : FMN ; Suppression LMC_COLOR fait dans OpenGl_execstruct.c
       30-06-97 : FMN ; Suppression OpenGl_telem_light.h
       18-07-97 : FMN ; Ajout desactivation des lights suivant front_lighting_model
       21-07-97 : FMN ; Amelioration des performances OPTIMISATION_FMN
                  - suppression calcul inutile sur les front faces
                  - utilisation de GL_TRIANGLES et GL_QUADS
       27-08-97 : FMN ; Correction affichage des edges
                  On n'affiche que les edges dans le mode IS_EMPTY
       27-08-97 : FMN ; Correction affichage des edges visibility [PRO9859]
       10-09-97 : FMN ; Amelioration des perfs liees aux lights.
       15-09-97 : PCT ; Ajout coordonnees textures
       24-09-97 : FMN ; Suppression OPTIMISATION_FMN.
       08-12-97 : FMN ; Suppression appel TsmGetAttri inutile.
       31-12-97 : FMN ; Simplification pour le highlight
       15-01-98 : FMN ; Ajout Hidden line
       08-03-01 : GG  ; BUC60823 Avoid crash in the normal computation method
                        on confuse point.

************************************************************************/

#define xPRINT

#define G003      /* EUG 07-10-99 Degeneration mode support 
*/

#define G004      /* VKH 25-01-00 View dump management
              Disable animation during dump
*/

#define BUC60876  /* GG 5/4/2001 Disable local display list
//                when animation is not required
*/

#define OCC749          /* SAV 19/09/02 added processing of colored vertices */
#define OCC7824         /* ASL 26/01/05 transparency of polygon with colors assigned to vertices */

/*----------------------------------------------------------------------*/
/*
 * Includes
 */ 

#include <OpenGl_tgl_all.h>

#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <GL/gl.h>
#include <GL/glu.h>

#include <OpenGl_cmn_varargs.h>
#include <OpenGl_cmn_memory.h>
#include <OpenGl_telem_attri.h>
#include <OpenGl_tsm.h>
#include <OpenGl_telem.h>
#include <OpenGl_telem_util.h>
#include <OpenGl_telem_highlight.h>
#include <OpenGl_telem_inquire.h>
#include <OpenGl_telem_view.h>
#include <OpenGl_tgl_funcs.h>
#include <OpenGl_LightBox.h>
#include <OpenGl_TextureBox.h>

#ifdef G003
# include <float.h>
# define DEF_DS_INTERNAL
# include <OpenGl_degeneration.h>
# ifdef WNT
#  define GET_GL_CONTEXT() wglGetCurrentContext ()
# else
#  define GET_GL_CONTEXT() glXGetCurrentContext ()
# endif  /* WNT */

#ifdef G004
  extern GLboolean g_fBitmap;
#endif /* G004 */
#endif  /* G003 */

static long s_Rand = 1L;
# define OPENGL_RAND() (  ( unsigned )( s_Rand = s_Rand * 214013L + 2531011L ))

/*----------------------------------------------------------------------*/
/*
 * Constantes
 */ 

/*----------------------------------------------------------------------*/
/*
 * Prototypes
 */ 

static  TStatus  PolygonIndicesDisplay( TSM_ELEM_DATA, Tint, cmn_key* );
static  TStatus  PolygonIndicesAdd( TSM_ELEM_DATA, Tint, cmn_key* );
static  TStatus  PolygonIndicesDelete( TSM_ELEM_DATA, Tint, cmn_key* );
static  TStatus  PolygonIndicesPrint( TSM_ELEM_DATA, Tint, cmn_key* );
static  TStatus  PolygonIndicesInquire( TSM_ELEM_DATA, Tint, cmn_key* );

/*static  GLboolean       lighting_mode;*/

typedef struct
{
   Tint       num_vertices;   /* Number of vertices */
   Tint       num_bounds;     /* Number of bounds */
   Tint       facet_flag;     /* TEL_FA_NONE or TEL_FA_NORMAL */
   Tint       vertex_flag;    /* TEL_VT_NONE or TEL_VT_NORMAL */
   Tint       shape_flag;     /* TEL_SHAPE_UNKNOWN or TEL_SHAPE_COMPLEX or
                                 TEL_SHAPE_CONVEX  or TEL_SHAPE_CONCAVE */
   Tint       *edge_vis;      /* Edge visibility indicators for each edge */
   Tint       *bounds;        /* Bounds array */
   Tint       *indices;       /* Connectivity array */
   tel_point  fnormals;       /* Facet normals */
   tel_colour fcolours;       /* Facet colour values */
   tel_point  vertices;       /* Vertices */
   tel_colour vcolours;       /* Vertex colour values */
   tel_point  vnormals;       /* Vertex normals */
   tel_texture_coord vtexturecoord; /* Texture Coordinates */
   Tint       edge_count;     /* Internal field */
#ifdef G003
   DS_INTERNAL d;
#endif  /* G003 */
} TEL_INDEXPOLY_DATA, *tel_indexpoly_data;

static TEL_INDEXPOLY_DATA indexpoly_defaults =
{
   0,                    /* num_vertices */
   0,                    /* num_bounds */
   TEL_FA_NONE,          /* facet_flag */
   TEL_VT_NONE,          /* vertex_flag */
   TEL_SHAPE_UNKNOWN,    /* shape_flag */
   0,                    /* edge_vis */
   0,                    /* bounds */
   0,                    /* indices */
   0,                    /* fnormal */
   0,                    /* fcolour */
   0,                    /* vertices */
   0,                    /* vcolours */
   0,                    /* vnormals */
   0,                    /* vtexturecoord */
   0                     /* edge_count */
#ifdef G003
   , { 0, 0, 0, -1, 0.0F, NULL }
#endif  /* G003 */
};

static void draw_indexpoly(
             tel_indexpoly_data,
           Tint,          /* highlight_flag */
             Tint,          /* front_lighting_model,  */
             Tint,          /* interior_style,  */
             tel_colour     /* edge_colour, */
#ifdef OCC749
           , tel_surf_prop
#endif
             );

#ifdef G003
static void draw_edges                 ( tel_indexpoly_data, tel_colour, Tint, Tint );
static void draw_degenerates_as_points ( tel_indexpoly_data                         );
static void draw_degenerates_as_bboxs  ( tel_indexpoly_data                         );
void set_drawable_items         ( GLboolean*, int                            );
#else
static void draw_edges( tel_indexpoly_data,tel_colour, Tint);
#endif

static  TStatus  (*MtdTbl[])( TSM_ELEM_DATA, Tint, cmn_key* ) =
{
    PolygonIndicesDisplay,             /* PickTraverse */
    PolygonIndicesDisplay,
    PolygonIndicesAdd,
    PolygonIndicesDelete,
    PolygonIndicesPrint,
    PolygonIndicesInquire
};

/*----------------------------------------------------------------------*/
/*
 * Variables externes
 */
 
extern  Tint  ForbidSetTextureMapping; /* currently defined in tsm/tsm.c */
extern int   g_nDegenerateModel;

#ifdef G003
extern float g_fSkipRatio;
extern GLboolean g_fAnimation;
#endif  /* G003 */

/*----------------------------------------------------------------------*/

MtblPtr
TelPolygonIndicesInitClass( TelType* el )
{
    *el = TelPolygonIndices;
    return MtdTbl;
}

/*----------------------------------------------------------------------*/

static  TStatus
PolygonIndicesAdd( TSM_ELEM_DATA d, Tint n, cmn_key *k )
                     /* Accepts the keys NUM_VERTICES_ID,
                                         VERTICES_ID,
                                         NUM_FACETS_ID,
                                         BOUNDS_DATA_ID,
                                         EDGE_DATA_ID,
                                         CONNECTIVITY_ID,
                                         FNORMALS_ID,
                                         FACET_COLOUR_VALS_ID,
                                         VERTEX_COLOUR_VALS_ID,
                                         VNORMALS_ID,
                                         SHAPE_FLAG_ID,
                               VTEXTURECOORD_ID */
{
    Tint             i, j, a, b, edge_count=0;
    tel_indexpoly_data data;

    for( i = 0; i < n; i++ )
    {
       if( k[i]->id == NUM_VERTICES_ID )
           break;
    }
    if( i == n )
        return TFailure;

    if( !(k[i]->data.ldata) )
        return TFailure;

    for( j = 0; j < n; j++ )
    {
       if( k[j]->id == VERTICES_ID )
           break;
    }
    if( j == n )
        return TFailure;

    for( a = 0; a < n; a++ )
    {
       if( k[a]->id == NUM_FACETS_ID )
           break;
    }
    if( a == n )
        return TFailure;

    data = cmn_getmem( 1, sizeof( TEL_INDEXPOLY_DATA ), 1 );
    if( !data )
        return TFailure;

    /* load defaults */
    cmn_memcpy( data, &indexpoly_defaults, sizeof( TEL_INDEXPOLY_DATA ) );

    data->num_vertices = k[i]->data.ldata;
    data->vertices = cmn_getmem( data->num_vertices, sizeof( TEL_POINT ), 0 );
    cmn_memcpy( data->vertices, k[j]->data.pdata, data->num_vertices *
                                                  sizeof( TEL_POINT ) );
    data->num_bounds = k[a]->data.ldata;

    for( b = 0; b < n; b++ )
    {
       if( k[b]->id == BOUNDS_DATA_ID )
           break;
    }
    if( b == n )
    {
        cmn_freemem( data->vertices );
        return TFailure;
    }
    data->bounds = cmn_getmem( data->num_bounds, sizeof( Tint ), 0 );
    cmn_memcpy( data->bounds, k[b]->data.pdata, data->num_bounds*sizeof(Tint) );

    for( b = 0; b < data->num_bounds; b++ )
        edge_count += data->bounds[b];

    data->edge_count = edge_count;

    for( i = 0; i < n; i++ )
    {
       switch( k[i]->id )
       {
          case EDGE_DATA_ID:
             data->edge_vis = cmn_getmem( edge_count, sizeof(Tint), 1 );
             cmn_memcpy( data->edge_vis, k[i]->data.pdata,
                                                  edge_count * sizeof(Tint) );
             break;

          case CONNECTIVITY_ID:
             data->indices = cmn_getmem( edge_count, sizeof(Tint), 0 );
             cmn_memcpy( data->indices, k[i]->data.pdata,
                                                 edge_count * sizeof(Tint) );
             break;

          case FNORMALS_ID:
             data->facet_flag = TEL_FA_NORMAL;
             data->fnormals = cmn_getmem( data->num_bounds,
                                                       sizeof(TEL_POINT), 0 );
             cmn_memcpy( data->fnormals, k[i]->data.pdata, data->num_bounds *
                                                          sizeof(TEL_POINT) );
             for( a = 0; a < data->num_bounds; a++ )
                vecnrm( data->fnormals[a].xyz );
             break;

          case FACET_COLOUR_VALS_ID:
             data->fcolours = cmn_getmem( data->num_bounds,
                                                        sizeof(TEL_COLOUR), 1 );
             cmn_memcpy( data->fcolours, k[i]->data.pdata, data->num_bounds *
                                                           sizeof(TEL_COLOUR) );
             break;

          case VERTEX_COLOUR_VALS_ID:
             data->vcolours = cmn_getmem( data->num_vertices,
                                                       sizeof(TEL_COLOUR), 0 );
             cmn_memcpy( data->vcolours, k[i]->data.pdata, data->num_vertices *
                                                           sizeof(TEL_COLOUR) );
             break;

          case VNORMALS_ID:
             data->vertex_flag = TEL_VT_NORMAL;
             data->vnormals = cmn_getmem( data->num_vertices,
                                                       sizeof(TEL_POINT), 0 );
             cmn_memcpy( data->vnormals, k[i]->data.pdata, data->num_vertices *
                                                           sizeof(TEL_POINT) );
             for( j = 0; j < data->num_vertices; j++ )
                 vecnrm( data->vnormals[j].xyz );
             break;

          case SHAPE_FLAG_ID:
             data->shape_flag = k[i]->data.ldata;
             break;

          case VTEXTURECOORD_ID:
           data->vtexturecoord = cmn_getmem(data->num_vertices,
                                    sizeof(TEL_TEXTURE_COORD), 1);
           cmn_memcpy(data->vtexturecoord, k[i]->data.pdata, data->num_vertices*
                  sizeof(TEL_TEXTURE_COORD));
           break;
       }
    }

    if( data->facet_flag != TEL_FA_NORMAL )
    {
        data->fnormals = cmn_getmem( data->num_bounds, sizeof( TEL_POINT ), 0 );
        for( i = 0, a = 0; i < data->num_bounds; i++ ) {
#ifdef BUC60823
          TelGetPolygonNormal( data->vertices, &data->indices[a],
                  data->bounds[i], data->fnormals[i].xyz );
#else
        TelGetNormal( data->vertices[data->indices[a]].xyz,
                          data->vertices[data->indices[a+1]].xyz,
                          data->vertices[data->indices[a+j]].xyz,
                          data->fnormals[i].xyz );
          vecnrm(data->fnormals[i].xyz);
#endif
          a += data->bounds[i];
        }
    }
#ifdef G003
    data -> d.bDraw = ( GLboolean* )cmn_getmem (
                                     data -> num_bounds, sizeof ( GLboolean ), 0
                                    );
#endif  /* G003 */
    ((tsm_elem_data)(d.pdata))->pdata = data;

    return TSuccess;
}

/*----------------------------------------------------------------------*/

static  TStatus
PolygonIndicesDisplay( TSM_ELEM_DATA data, Tint n, cmn_key *k )
{
   CMN_KEY       k11, k12, k17, k111, k114;
#ifdef OCC749
   CMN_KEY       k117;
#endif

   Tint           front_lighting_model;
   Tint           interior_style;
   TEL_COLOUR     interior_colour;
   TEL_COLOUR     edge_colour;
#ifdef OCC749
   TEL_SURF_PROP  prop;
#endif

   tel_indexpoly_data d;

   k12.id          = TelInteriorReflectanceEquation;
   k17.id          = TelInteriorStyle;
   k111.id         = TelInteriorColour;
   k111.data.pdata = &interior_colour;
   k114.id         = TelEdgeColour;
   k114.data.pdata = &edge_colour;
#ifdef OCC749
   k117.id         = TelSurfaceAreaProperties;
   k117.data.pdata = &prop;
#endif

#ifdef OCC749
   TsmGetAttri( 5, &k12, &k17, &k111, &k114, &k117);
#else
   TsmGetAttri( 4, &k12, &k17, &k111, &k114);
#endif

   front_lighting_model     = k12.data.ldata;
   interior_style           = k17.data.ldata;

#ifdef PRINT
   printf("PolygonIndicesDisplay \n"); 
#endif

    /* 
     * Use highlight colours 
     */
     
   if( k[0]->id == TOn )
   {                         
        TEL_HIGHLIGHT  hrep;

        k11.id = TelHighlightIndex;
        TsmGetAttri( 1, &k11 );
        if( TelGetHighlightRep( TglActiveWs, k11.data.ldata, &hrep ) == TSuccess )
        {
            if( hrep.type == TelHLForcedColour )
          {
                edge_colour = interior_colour = hrep.col;
            front_lighting_model = CALL_PHIGS_REFL_NONE;
          }
            else if( hrep.type == TelHLColour )
          {
                edge_colour = hrep.col;
            k[0]->id = TOff;
            }
        }
        else
        {
            TelGetHighlightRep( TglActiveWs, 0, &hrep );
            if( hrep.type == TelHLForcedColour )
          {
                edge_colour = interior_colour = hrep.col;
            front_lighting_model = CALL_PHIGS_REFL_NONE;
          }
            else if( hrep.type == TelHLColour )
          {
                edge_colour = hrep.col;
            k[0]->id = TOff;
            }
        }
   }

   d = data.pdata;

   glColor3fv( interior_colour.rgb );
#ifdef PRINT
   printf("PolygonIndicesDisplay.interior_colour %f,%f,%f \n",
      interior_colour.rgb[0],interior_colour.rgb[1],interior_colour.rgb[2]); 
#endif

   draw_indexpoly( d, k[0]->id,
               front_lighting_model,
               interior_style,
               &edge_colour
#ifdef OCC749
               , &prop
#endif
             );

    return TSuccess;

}

/*----------------------------------------------------------------------*/

static void
draw_indexpoly( tel_indexpoly_data p, Tint hflag,
             Tint front_lighting_model,
             Tint interior_style,
             tel_colour edge_colour
#ifdef OCC749
           , tel_surf_prop prop
#endif
            )
{
    Tint i, j, k, a, newList = 0;
    Tint  lighting_model;
    
    /* Following pointers have been provided for performance improvement */
    Tint       *ind;
    tel_point  pfn, pvn, pv;
    tel_colour pvc, pfc;
    tel_texture_coord pvt;

    ind = p->indices;
    pfn = p->fnormals;
    pvn = p->vnormals;
    pvc = p->vcolours;
    pfc = p->fcolours;
    pv  = p->vertices;
    pvt = p->vtexturecoord;
#ifdef G003
    if ( g_nDegenerateModel < 2 && interior_style != TSM_EMPTY ) 
#else
    if ( interior_style != TSM_EMPTY ) 
#endif  /* G003 */
    {      
      if( hflag == TOn )
      {
         pvc = 0;
         pfc = 0;
      }
       
        if ( interior_style == TSM_HIDDENLINE)
      {
         pvc = 0;
         pfc = 0;
      }
      
      if (front_lighting_model == CALL_PHIGS_REFL_NONE)
        LightOff();
      else LightOn();
    
      lighting_model = front_lighting_model;
    
#ifdef G003
#ifdef BUC60876
     if ( !g_fAnimation ) 
            goto doDraw; /* Disable object display list out of animation */
#endif
#ifdef G004
      if ( g_fBitmap ) 
        goto doDraw;  /* dipsplay lists are NOT shared between */
                              /*  window's context and bitmap's one    */
#endif /* G004 */
      
            if ( p -> d.model != lighting_model || !p -> d.list ||
          p -> d.model == -1 ||( g_nDegenerateModel && p -> d.skipRatio != g_fSkipRatio )) {

        p -> d.skipRatio = g_fSkipRatio;
        p -> d.model     = lighting_model;
        p -> d.degMode   = g_nDegenerateModel;
#endif  /* G003 */
#ifdef G003
        if ( g_fSkipRatio == 0.0 ) {
          if ( !p -> d.list ) p -> d.list = glGenLists ( 1 );
          
          glNewList ( p -> d.list, GL_COMPILE_AND_EXECUTE );
          newList = 1;
doDraw:
#endif  /* G003 */
        
      if ( lighting_model == CALL_PHIGS_REFL_NONE ) {
        if ( p -> bounds[ 0 ] == 3 )
        glBegin ( GL_TRIANGLES );
      else if ( p -> bounds[ 0 ] == 4 )
        glBegin ( GL_QUADS );
      else glBegin ( GL_POLYGON );

        if ( pvc ) {
        for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
          a = j + p -> bounds[ i ];
          for ( ; j < a; ++j ) {
            glColor3fv  ( pvc[  ind[ j ]  ].rgb  );
            glVertex3fv ( pv[   ind[ j ]  ].xyz  );
          }  /* end for ( j . . . ) */
        }  /* end for ( i . . . ) */
        } else if ( pfc ) {
        for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
          a = j + p -> bounds[ i ];
          glColor3fv ( pfc[ i ].rgb );
          for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz );
        }  /* end for */
        } else {
        for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
          a = j + p -> bounds[ i ];
          for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz  );
        }  /* end for */
        }  /* end else */
        glEnd ();
       } else {    /* lighting_model != TelLModelNone */
       if ( p -> bounds[ 0 ] == 3 )
         glBegin ( GL_TRIANGLES );
       else if ( p -> bounds[ 0 ] == 4 )
         glBegin ( GL_QUADS );
       else glBegin ( GL_POLYGON );

#ifdef OCC749
         for ( i = a = 0; i < p -> num_bounds; ++i ) {
         j = a; a += p -> bounds[ i ];
             if( pfn ) glNormal3fv ( pfn[ i ].xyz );
             if( pfc && !prop->isphysic ) {
               GLfloat diff[4], ambi[4], emsv[4], r, g, b;

#ifdef OCC7824
               ambi[3] = diff[3] = emsv[3] = prop->trans;
#else
                 ambi[3] = 1.0f;  diff[3] = 1.0f;  emsv[3] = 1.0f;
#endif
           
             r = pfc[ i ].rgb[0];  g = pfc[ i ].rgb[1];  b = pfc[ i ].rgb[2];

             if( prop->isamb ) {
             ambi[0] = prop->amb * r;
             ambi[1] = prop->amb * g;
             ambi[2] = prop->amb * b;
             glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambi);
             }
             if( prop->isdiff ) {
             diff[0] = prop->diff * r;
             diff[1] = prop->diff * g;
             diff[2] = prop->diff * b;
             glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
             }
             if( prop->isemsv ) {
             emsv[0] = prop->emsv * r;
             emsv[1] = prop->emsv * g;
             emsv[2] = prop->emsv * b;
             glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, emsv);
             }
           }
             for ( ; j < a; ++j ) {
               k = ind[ j ];
               if( pvn ) glNormal3fv ( pvn[ k ].xyz );
               if( pvc && !prop->isphysic ) {
                 GLfloat diff[4], ambi[4], emsv[4], r, g, b;

#ifdef OCC7824
               ambi[3] = diff[3] = emsv[3] = prop->trans;
#else
                 ambi[3] = 1.0f;  diff[3] = 1.0f;  emsv[3] = 1.0f;
#endif

             r = pvc[ k ].rgb[0];  g = pvc[ k ].rgb[1];  b = pvc[ k ].rgb[2];

                 if( prop->isamb ) {
               ambi[0] = prop->amb * r;
               ambi[1] = prop->amb * g;
               ambi[2] = prop->amb * b;
               glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambi);
                 }
                 if( prop->isdiff ) {
               diff[0] = prop->diff * r;
               diff[1] = prop->diff * g;
               diff[2] = prop->diff * b;
               glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diff);
                 }
                 if( prop->isemsv ) {
               emsv[0] = prop->emsv * r;
               emsv[1] = prop->emsv * g;
               emsv[2] = prop->emsv * b;
               glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, emsv);
                 }
             }
               if( pvt && !ForbidSetTextureMapping ) glTexCoord2fv ( pvt[ k ].xy  );
               glVertex3fv ( pv[ k ].xyz );
             }  /* end for ( j . . . ) */
         }  /* end for ( i . . . ) */
         glEnd ();  
#else
       if ( pvn ) {
         if ( pvt && !ForbidSetTextureMapping )
           for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
             a = j + p -> bounds[ i ];
             for ( ; j < a; ++j ) {
             glNormal3fv   ( pvn[  ind[ j ]  ].xyz );
             glTexCoord2fv ( pvt[  ind[ j ]  ].xy  );
             glVertex3fv   ( pv[   ind[ j ]  ].xyz );
             }  /* end for ( j . . . ) */
           }  /* end for ( i . . . ) */
         else
           for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
             a = j + p -> bounds[ i ];
             for ( ; j < a; ++j ) {
             glNormal3fv ( pvn[  ind[ j ]  ].xyz  );
             glVertex3fv ( pv[   ind[ j ]  ].xyz  );
             }  /* end for ( j . . . ) */
           }  /* end for ( i . . . ) */
       } else { /* !pvn */
         for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
           a = j + p -> bounds[ i ];
           glNormal3fv ( pfn[ i ].xyz );
           for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz  );
         }  /* end for */
       }  /* end else */
       glEnd ();  
#endif /* OCC749 */

       }  /* end else */
#ifdef G003
      } else if ( g_fSkipRatio != 1.0 ) {
      if ( !p -> d.dlist ) p -> d.dlist = glGenLists ( 1 );
      glNewList ( p -> d.dlist, GL_COMPILE_AND_EXECUTE );
      newList = 1;
      set_drawable_items ( p -> d.bDraw, p -> num_bounds );
      if ( lighting_model == CALL_PHIGS_REFL_NONE ) {
        if ( p -> bounds[ 0 ] == 3 )
          glBegin ( GL_TRIANGLES );
        else if ( p -> bounds[ 0 ] == 4 )
          glBegin ( GL_QUADS );
        else glBegin ( GL_POLYGON );
         
        if ( pvc ) {
          for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
            a = j + p -> bounds[ i ];
            if ( p -> d.bDraw[ i ] )
            for ( ; j < a; ++j ) {
              glColor3fv  ( pvc[  ind[ j ]  ].rgb  );
              glVertex3fv ( pv[   ind[ j ]  ].xyz  );
            }  /* end for ( j . . . ) */
            else j = a;
          }  /* end for ( i . . . ) */
        } else if ( pfc ) {
          for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
            a = j + p -> bounds[ i ];
            if ( p -> d.bDraw[ i ] ) {
            glColor3fv ( pfc[ i ].rgb );
            for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz );
            } else j = a;
          }  /* end for */
        } else {
          for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
            a = j + p -> bounds[ i ];
            if ( p -> d.bDraw[ i ] )
            for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz  );
            else j = a;
          }  /* end for */
        }  /* end else */
        glEnd ();
      } else {     /* lighting_model != TelLModelNone */
        if ( p -> bounds[ 0 ] == 3 )
          glBegin ( GL_TRIANGLES );
        else if ( p -> bounds[ 0 ] == 4 )
          glBegin ( GL_QUADS );
        else glBegin ( GL_POLYGON );

        if ( pvn ) {
          if ( pvt && !ForbidSetTextureMapping )
            for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
            a = j + p->bounds[ i ];
            if ( p -> d.bDraw[ i ] )
              for ( ; j < a; ++j ) {
                glNormal3fv   ( pvn[  ind[ j ]  ].xyz );
                glTexCoord2fv ( pvt[  ind[ j ]  ].xy  );
                glVertex3fv   ( pv[   ind[ j ]  ].xyz );
              }  /* end for ( j . . . ) */
            else j = a;
            }  /* end for ( i . . . ) */
          else
            for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
            a = j + p -> bounds[ i ];
            if ( p -> d.bDraw[ i ] )
              for ( ; j < a; ++j ) {
                glNormal3fv ( pvn[  ind[ j ]  ].xyz  );
                glVertex3fv ( pv[   ind[ j ]  ].xyz  );
              }  /* end for ( j . . . ) */
            else j = a;
            }  /* end for ( i . . . ) */
        } else {  /* !pvn */
          for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {
            a = j + p -> bounds[ i ];
            if ( p -> d.bDraw[ i ] ) {
            glNormal3fv ( pfn[ i ].xyz );
            for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz  );
            } else j = a;
          }  /* end for */
        }  /* end else */
        glEnd ();  
      }  /* end else */
      } else {
      if ( !p -> d.dlist ) p -> d.dlist = glGenLists ( 1 );
      glNewList ( p -> d.dlist, GL_COMPILE_AND_EXECUTE );
      newList = 1;
      }  /* end else */
#endif  /* G003 */
#ifdef G003
       if ( newList ) glEndList ();
       if ( g_nDegenerateModel ) return;
        } else {
          glCallList ( g_fSkipRatio == 0.0 ? p -> d.list : p -> d.dlist );
          if ( g_nDegenerateModel ) return;
      }  /* end else */
#endif  /* G003 */
      }
#ifdef G003
    i = 0;
    
    switch ( g_nDegenerateModel ) {

     default:
      break;

     case 2:  /* XXX_TDM_WIREFRAME */
      i = 1;
      break;

     case 3:  /* XXX_TDM_MARKER */
      draw_degenerates_as_points ( p );
      return;

     case 4:  /* XXX_TDM_BBOX */
      draw_degenerates_as_bboxs ( p );
      return;

    }  /* end switch */

    draw_edges ( p, edge_colour, interior_style, i );
#else
    draw_edges( p, edge_colour, interior_style );
#endif
}

/*----------------------------------------------------------------------*/

static  TStatus
PolygonIndicesDelete( TSM_ELEM_DATA data, Tint n, cmn_key *k )
{
    tel_indexpoly_data p;

    p = data.pdata;
    if( p->edge_vis )
        cmn_freemem( p->edge_vis );
    if( p->bounds )
        cmn_freemem( p->bounds );
    if( p->indices )
        cmn_freemem( p->indices );
    if( p->fcolours )
        cmn_freemem( p->fcolours );
    if( p->fnormals )
        cmn_freemem( p->fnormals );
    if( p->vertices )
        cmn_freemem( p->vertices );
    if( p->vcolours )
        cmn_freemem( p->vcolours );
    if( p->vnormals )
        cmn_freemem( p->vnormals );
    if (p->vtexturecoord)
        cmn_freemem( p->vtexturecoord );
#ifdef G003
    if (  GET_GL_CONTEXT() != NULL  ) {

     if ( p ->  d.list ) glDeleteLists ( p ->  d.list, 1 );
     if ( p -> d.dlist ) glDeleteLists ( p -> d.dlist, 1 );

    }  /* end if */

    if ( p -> d.bDraw ) cmn_freemem ( p -> d.bDraw );
#endif  /* G003 */

    cmn_freemem( data.pdata );
    return TSuccess;
}

/*----------------------------------------------------------------------*/

static  TStatus
PolygonIndicesPrint( TSM_ELEM_DATA data, Tint n, cmn_key *k )
{
    Tint             i;
    tel_indexpoly_data p;

    p = data.pdata;

    fprintf( stdout, "TelPolygonIndices. Number of Vertices: %d\n", p->num_vertices );
    switch( p->shape_flag )
    {
       case TEL_SHAPE_UNKNOWN:
          fprintf( stdout, "\t\tShape Flag : UNKNOWN\n" );
          break;

       case TEL_SHAPE_COMPLEX:
          fprintf( stdout, "\t\tShape Flag : COMPLEX\n" );
          break;

       case TEL_SHAPE_CONCAVE:
          fprintf( stdout, "\t\tShape Flag : CONCAVE\n" );
          break;

       case TEL_SHAPE_CONVEX:
          fprintf( stdout, "\t\tShape Flag : CONVEX\n" );
          break;

    }
    switch( p->facet_flag )
    {
       case TEL_FA_NONE:
          if( p->fcolours )
              fprintf( stdout, "\t\tFacet Flag : COLOUR\n" );
          else
              fprintf( stdout, "\t\tFacet Flag : NONE\n" );
          break;

       case TEL_FA_NORMAL:
          if( p->fcolours )
             fprintf( stdout, "\t\tFacet Flag : COLOURNORMAL\n" );
          else
             fprintf( stdout, "\t\tFacet Flag : NORMAL\n" );
          break;
    }
    switch( p->vertex_flag )
    {
       case TEL_VT_NONE:
          if( p->vcolours )
              fprintf( stdout, "\t\tVertex Flag : COLOUR\n" );
          else
              fprintf( stdout, "\t\tVertex Flag : NONE\n" );
          break;

       case TEL_VT_NORMAL:
          if( p->vcolours )
             fprintf( stdout, "\t\tVertex Flag : COLOURNORMAL\n" );
          else
             fprintf( stdout, "\t\tVertex Flag : NORMAL\n" );
          break;
    }
    if( p->edge_vis )
    {
        fprintf( stdout, "\t\tEdge Visibility Data :\n" );
        for( i = 0; i < p->edge_count; i++ )
           fprintf( stdout, "\t\t%d ", p->edge_vis[i] );
        fprintf( stdout, "\n" );
    }
    if( p->bounds )
    {
        fprintf( stdout, "\t\tBounds array :\n" );
        for( i = 0; i < p->num_bounds; i++ )
           fprintf( stdout, "\t\tb[%d] %d \n", i, p->bounds[i] );
    }
    if( p->indices )
    {
        fprintf( stdout, "\t\tConnectivity array :\n" );
        for( i = 0; i < p->edge_count; i++ )
            fprintf( stdout, "\t\tI[%d] %d \n", i, p->indices[i] );
    }
    if( p->fnormals )
    {
         fprintf( stdout, "\n\t\tFacet Normals : " );
         for( i = 0; i < p->num_bounds; i++ )
            fprintf( stdout, "\n\t\t v[%d] = %g %g %g", i,
                                                        p->fnormals[i].xyz[0],
                                                        p->fnormals[i].xyz[1],
                                                        p->fnormals[i].xyz[2] );
         fprintf( stdout, "\n" );
    }
    else
       fprintf( stdout, "\n\t\tFacet Normals not specified\n" );

    if( p->fcolours )
    {
         fprintf( stdout, "\n\t\tFacet Colours : " );
         for( i = 0; i < p->num_bounds; i++ )
            fprintf( stdout, "\n\t\t v[%d] = %g %g %g", i,
                                                        p->fcolours[i].rgb[0],
                                                        p->fcolours[i].rgb[1],
                                                        p->fcolours[i].rgb[2] );    }
    else
       fprintf( stdout, "\n\t\tFacet Colours not specified\n" );

    if( p->vertices )
    {
         fprintf( stdout, "\n\t\tVertices : " );
         for( i = 0; i < p->num_vertices; i++ )
            fprintf( stdout, "\n\t\t v[%d] = %g %g %g", i,
                                                        p->vertices[i].xyz[0],
                                                        p->vertices[i].xyz[1],
                                                        p->vertices[i].xyz[2] );
    }

    fprintf( stdout, "\n" );
    if( p->vcolours )
    {
         fprintf( stdout, "\n\t\tVertex Colours : " );
         for( i = 0; i < p->num_vertices; i++ )
            fprintf( stdout, "\n\t\t v[%d] = %g %g %g", i,
                                                        p->vcolours[i].rgb[0],
                                                        p->vcolours[i].rgb[1],
                                                        p->vcolours[i].rgb[2] );
    }
    else
       fprintf( stdout, "\n\t\tVertex Colours not specified\n" );

    if( p->vnormals )
    {
         fprintf( stdout, "\n\t\tVertex Normals : " );
         for( i = 0; i < p->num_vertices; i++ )
            fprintf( stdout, "\n\t\t v[%d] = %g %g %g", i,
                                                        p->vnormals[i].xyz[0],
                                                        p->vnormals[i].xyz[1],
                                                        p->vnormals[i].xyz[2] );
    }
    else
       fprintf( stdout, "\n\t\tVertex Normals not specified\n" );

    if (p->vtexturecoord)
    {
      fprintf(stdout, "\n\t\tTexture Coordinates : ");
      for (i=0; i<p->num_vertices; i++)
      fprintf(stdout, "\n\t\t v[%d] = %g %g", i,
            p->vtexturecoord[i].xy[0],
            p->vtexturecoord[i].xy[1]);
    }
    else
      fprintf( stdout, "\n\t\tTexture Coordinates not specified\n");

    fprintf( stdout, "\n" );

    return TSuccess;
}

/*----------------------------------------------------------------------*/

static TStatus
PolygonIndicesInquire( TSM_ELEM_DATA data, Tint n, cmn_key *k )
{
   Tint                 i, j;
   tel_indexpoly_data   d;
   Tint                 size_reqd=0;
   Tint                 status = TSuccess;
   Tchar                *cur_ptr = 0;

   d = data.pdata;

   if( d->edge_vis )
       size_reqd += ( d->edge_count * sizeof( Tint ) );

   size_reqd += ( d->num_bounds * sizeof( Tint ) ); /* bounds */
   size_reqd += ( d->edge_count * sizeof( Tint ) ); /* connectivity */

   if( d->fcolours )
       size_reqd += ( d->num_bounds * sizeof( TEL_COLOUR ) );

   if( d->facet_flag == TEL_FA_NORMAL )
       size_reqd += ( d->num_bounds * sizeof( TEL_POINT ) );

   size_reqd += ( d->num_vertices * sizeof( TEL_POINT ) );

   if( d->vcolours )
      size_reqd += ( d->num_vertices * sizeof( TEL_COLOUR ) );

   if( d->vertex_flag == TEL_VT_NORMAL )
      size_reqd += ( d->num_vertices * sizeof( TEL_POINT ) );

   for( i = 0; i < n; i++ )
   {
      switch( k[i]->id )
      {
         case INQ_GET_SIZE_ID:
         {
            k[i]->data.ldata = size_reqd;
            break;
         }

         case INQ_GET_CONTENT_ID:
         {
            TEL_INQ_CONTENT *c;
            Teldata         *w;

            c = k[i]->data.pdata;
            c->act_size = size_reqd;
            w = c->data;

            cur_ptr = c->buf;
            w->indexedpolygons3data.shpflag = d->shape_flag;
            w->indexedpolygons3data.num_bounds = d->num_bounds;
            w->indexedpolygons3data.num_vertices = d->num_vertices;
            if( d->edge_vis )
                w->indexedpolygons3data.edgflag = TOn;
            else
                w->indexedpolygons3data.edgflag = TOff;

            if( c->size >= size_reqd )
            {
                if( d->facet_flag == TEL_FA_NORMAL )
                {
                   if( d->fcolours )
                   {
                      w->indexedpolygons3data.fctflag = TEL_FAFLAG_COLOURNORMAL;
                      w->indexedpolygons3data.gnormals = (tel_point)(c->buf);
                      for( j = 0; j < d->num_bounds; j++ )
                      {
                         w->indexedpolygons3data.gnormals[j] = d->fnormals[j];
                      }
                      cur_ptr += ( d->num_bounds * sizeof( TEL_POINT ) );

                      w->indexedpolygons3data.facet_colour_vals =
                                                          (tel_colour)(cur_ptr);
                      for( j = 0; j < d->num_bounds; j++ )
                      {
                         w->indexedpolygons3data.facet_colour_vals[j] =
                                                          d->fcolours[j];
                      }
                      cur_ptr += ( d->num_bounds * sizeof( TEL_COLOUR ) );
                   }
                   else
                   {
                      w->indexedpolygons3data.fctflag = TEL_FAFLAG_NORMAL;
                      w->indexedpolygons3data.facet_colour_vals = 0;
                      w->indexedpolygons3data.gnormals = (tel_point)(c->buf);
                      for( j = 0; j < d->num_bounds; j++ )
                      {
                         w->indexedpolygons3data.gnormals[j] = d->fnormals[j];
                      }
                      cur_ptr += ( d->num_bounds * sizeof( TEL_POINT ) );
                   }
                }
                else
                {
                   w->indexedpolygons3data.gnormals = 0;
                   if( d->fcolours )
                   {
                      w->indexedpolygons3data.fctflag = TEL_FAFLAG_COLOUR;
                      w->indexedpolygons3data.facet_colour_vals =
                                                          (tel_colour)(c->buf );
                      for( j = 0; j < d->num_bounds; j++ )
                      {
                         w->indexedpolygons3data.facet_colour_vals[j] =
                                                          d->fcolours[j];
                      }
                      cur_ptr += ( d->num_bounds * sizeof( TEL_COLOUR ) );
                   }
                   else
                   {
                      w->indexedpolygons3data.fctflag = TEL_FAFLAG_NONE;
                      w->indexedpolygons3data.facet_colour_vals = 0;
                   }
                }

                if( d->edge_vis )
                {
                    w->indexedpolygons3data.edgvis = (Tint *)(cur_ptr);
                    cmn_memcpy( w->indexedpolygons3data.edgvis, d->edge_vis,
                                               d->edge_count * sizeof( Tint ) );
                    cur_ptr += (d->edge_count * sizeof( Tint ) );
                }

                w->indexedpolygons3data.points = (tel_point)cur_ptr;
                for( j = 0; j < d->num_vertices; j++ )
                {
                   w->indexedpolygons3data.points[j] = d->vertices[j];
                }
                cur_ptr += ( d->num_vertices * sizeof( TEL_POINT ) );

                w->indexedpolygons3data.bounds = (Tint *)cur_ptr;
                cmn_memcpy( w->indexedpolygons3data.bounds, d->bounds,
                                        d->num_bounds * sizeof( Tint ) );
                cur_ptr += ( d->num_bounds * sizeof( Tint ) );

                w->indexedpolygons3data.indices = (Tint *)cur_ptr;
                cmn_memcpy( w->indexedpolygons3data.indices, d->indices,
                                        d->edge_count * sizeof( Tint ) );
                cur_ptr += ( d->edge_count * sizeof( Tint ) );

                if( d->vertex_flag == TEL_VT_NORMAL )
                {
                   if( d->vcolours )
                   {
                      w->indexedpolygons3data.vrtflag = TEL_VTFLAG_COLOURNORMAL;
                      w->indexedpolygons3data.vnormals = (tel_point)(cur_ptr);
                      for( j = 0; j < d->num_vertices; j++ )
                      {
                         w->indexedpolygons3data.vnormals[j] = d->vnormals[i];
                      }
                      cur_ptr += ( d->num_vertices * sizeof( TEL_POINT ) );

                      w->indexedpolygons3data.colours = (tel_colour)(cur_ptr);

                      for( j = 0; j < d->num_vertices; j++ )
                      {
                         w->indexedpolygons3data.colours[j] = d->vcolours[i];
                      }
                   }
                   else
                   {
                      w->indexedpolygons3data.vrtflag = TEL_VTFLAG_NORMAL;
                      w->indexedpolygons3data.colours = 0;
                      w->indexedpolygons3data.vnormals = (tel_point)(cur_ptr);

                      for( j = 0; j < d->num_vertices; j++ )
                      {
                         w->indexedpolygons3data.vnormals[j] = d->vnormals[i];
                      }
                   }
                }
                else
                {
                   w->indexedpolygons3data.vnormals = 0;
                   if( d->vcolours )
                   {
                      w->indexedpolygons3data.vrtflag = TEL_VTFLAG_COLOUR;
                      w->indexedpolygons3data.colours = (tel_colour)(cur_ptr);
                      for( j = 0; j < d->num_vertices; j++ )
                      {
                         w->indexedpolygons3data.colours[j] = d->vcolours[i];
                      }
                   }
                   else
                   {
                      w->indexedpolygons3data.vrtflag = TEL_VTFLAG_NONE;
                      w->indexedpolygons3data.colours = 0;
                   }
                }

                status = TSuccess;
            }
            else
                status = TFailure;
            break;
         }
      }
   }
   return status;
}

/*----------------------------------------------------------------------*/

static void
#ifdef G003
draw_edges ( tel_indexpoly_data p, tel_colour edge_colour,
             Tint interior_style, Tint forceDraw )
#else
draw_edges( tel_indexpoly_data p, tel_colour edge_colour, Tint interior_style )
#endif
{
    CMN_KEY k, k1, k2, k3, k4;
    Tint    *ind, *vis;
    Tint    i, j, a, newList = 0;
    Tint    edge_type, line_type_preserve;
    Tfloat  edge_width, line_width_preserve;
    GLboolean texture_on;
    
    tel_point  pv;
    
#ifdef G003
    if ( interior_style != TSM_HIDDENLINE && !forceDraw )
#else 
    if (interior_style != TSM_HIDDENLINE)
#endif
    {
      k.id = TelEdgeFlag;
      TsmGetAttri( 1, &k );
      if( k.data.ldata == TOff )return;
    } 
    
    pv  = p->vertices;
    ind = p->indices;
    vis = p->edge_vis;
    
    LightOff();
    texture_on = IsTextureEnabled();
    if (texture_on) DisableTexture();
    
    k1.id  = TelPolylineWidth;
    k2.id  = TelPolylineType;
    k3.id  = TelEdgeType;
    k4.id  = TelEdgeWidth;
    
    TsmGetAttri( 4, &k1, &k2, &k3, &k4 );
    
    line_width_preserve = k1.data.fdata;
    line_type_preserve  = k2.data.ldata;
    edge_type           = k3.data.ldata;
    edge_width          = k4.data.fdata;

    if( line_width_preserve != edge_width )
    {
       k.id = TelPolylineWidth;
       k.data.fdata = edge_width;
       TsmSetAttri( 1, &k );
    }
    if( line_type_preserve != edge_type )
    {
       k.id = TelPolylineType;
       k.data.ldata = edge_type;
       TsmSetAttri( 1, &k );
    }
   
#ifdef G003 
    if ( !forceDraw ) {

      glColor3fv    ( edge_colour -> rgb         );
      glPushAttrib  ( GL_POLYGON_BIT             );
      glPolygonMode ( GL_FRONT_AND_BACK, GL_LINE );

      for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {

       a = j + p -> bounds[ i ];

       glBegin ( GL_POLYGON );

        for ( ; j < a; ++j ) {

         glEdgeFlag (   ( GLboolean )( vis[ j ] == 1 ? GL_TRUE : GL_FALSE )  );
         glVertex3fv ( pv[  ind[ j ]  ].xyz );

        }  /* end for */

       glEnd();

       glEdgeFlag ( GL_TRUE );

      }  /* end for */

     glPopAttrib ();

    } else {

#ifdef BUC60876
     if ( !g_fAnimation ) 
            goto doDraw; /* Disable object display list out of animation */
#endif
#ifdef G004
     if ( g_fBitmap ) 
            goto doDraw;
#endif /* G004 */

     if ( p -> d.degMode != 2 || p -> d.skipRatio != g_fSkipRatio || !p -> d.dlist ) {

      if ( !p -> d.dlist ) p -> d.dlist = glGenLists ( 1 );

      p -> d.degMode   = 2;
      p -> d.skipRatio = g_fSkipRatio;
      glNewList ( p -> d.dlist, GL_COMPILE_AND_EXECUTE );
      newList = 1;

doDraw:
       glPushAttrib ( GL_POLYGON_BIT | GL_DEPTH_BUFFER_BIT );

        glEdgeFlag    ( GL_TRUE                    );
        glDisable     ( GL_DEPTH_TEST              );
        glPolygonMode ( GL_FRONT_AND_BACK, GL_LINE );

        if ( g_fSkipRatio == 0.0F )

         for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {

          a = j + p -> bounds[ i ];

          glBegin ( GL_POLYGON );

           for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz );

          glEnd();

         }  /* end for */

        else if ( g_fSkipRatio != 1.0F ) {

         set_drawable_items ( p -> d.bDraw, p -> num_bounds );

         for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {

          a = j + p -> bounds[ i ];

          if ( p -> d.bDraw[ i ] ) {

           glBegin ( GL_POLYGON );

            for ( ; j < a; ++j ) glVertex3fv ( pv[  ind[ j ]  ].xyz );

           glEnd();

          } else j = a;

         }  /* end for */

        }  /* end if */

       glPopAttrib ();
       if ( newList ) glEndList ();

     } else glCallList ( p -> d.dlist );

    }  /* end else */
#else
    glColor3fv( edge_colour->rgb );
    glPushAttrib(GL_POLYGON_BIT);    
    glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); 
    for( i = 0, j = 0, a = 0; i < p->num_bounds; i++ )
    {
       a = j + p->bounds[i];
       glBegin(GL_POLYGON);
       for( ; j < a; j++ )
       {
        if( vis[j] == 1) glEdgeFlag( GL_TRUE ); 
        else glEdgeFlag( GL_FALSE ); 
        glVertex3fv( pv[ ind[j] ].xyz );
       }
       glEnd();
       glEdgeFlag(GL_TRUE);
    }

    glPopAttrib();
#endif  /* G003 */

    if( line_width_preserve != edge_width )
    {
        k.id = TelPolylineWidth;
        k.data.fdata = line_width_preserve;
        TsmSetAttri( 1, &k );
    }
    if( line_type_preserve != edge_type )
    {
        k.id = TelPolylineType;
        k.data.ldata = line_type_preserve;
        TsmSetAttri( 1, &k );
    }
    if (texture_on) EnableTexture();
}
/*----------------------------------------------------------------------*/
#ifdef G003
static void draw_degenerates_as_points ( tel_indexpoly_data p ) {

 Tint*      ind, *vis;
 Tint       i, j, n, a, newList = 0;
 GLfloat    pt[ 3 ];
 tel_point  pv;

 pv  = p -> vertices;
 ind = p -> indices;
 vis = p -> edge_vis;

 LightOff ();

#ifdef G004
 if ( g_fBitmap ) goto doDraw;
#endif /* G004 */

 if ( p -> d.degMode != 3 || p -> d.skipRatio != g_fSkipRatio || !p -> d.dlist ) {

  if ( !p -> d.dlist ) p -> d.dlist = glGenLists ( 1 );

  p -> d.degMode   = 3;
  p -> d.skipRatio = g_fSkipRatio;
  glNewList ( p -> d.dlist, GL_COMPILE_AND_EXECUTE );
  newList = 1;
doDraw:
   if ( g_fSkipRatio == 0.0F ) {

    glBegin ( GL_POINTS );

     for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {

      n = p -> bounds[ i ];
      a = j + n;

      for ( pt [ 0 ] = pt[ 1 ] = pt[ 2 ] = 0.; j < a; ++j ) {

       pt[ 0 ] += pv[  ind[ j ]  ].xyz[ 0 ];
       pt[ 1 ] += pv[  ind[ j ]  ].xyz[ 1 ];
       pt[ 2 ] += pv[  ind[ j ]  ].xyz[ 2 ];

      }  /* end for ( j ) */

      pt[ 0 ] /= n;
      pt[ 1 ] /= n;
      pt[ 2 ] /= n;

      glVertex3fv ( pt );

     }  /* end for ( i ) */

    glEnd ();

   } else if ( g_fSkipRatio != 1.0 ) {

    set_drawable_items ( p -> d.bDraw, p -> num_bounds );

    glBegin ( GL_POINTS );

     for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {

      n = p -> bounds[ i ];
      a = j + n;

      if ( p -> d.bDraw[ i ] ) {

       for ( pt [ 0 ] = pt[ 1 ] = pt[ 2 ] = 0.; j < a; ++j ) {

        pt[ 0 ] += pv[  ind[ j ]  ].xyz[ 0 ];
        pt[ 1 ] += pv[  ind[ j ]  ].xyz[ 1 ];
        pt[ 2 ] += pv[  ind[ j ]  ].xyz[ 2 ];

       }  /* end for ( j ) */

       pt[ 0 ] /= n;
       pt[ 1 ] /= n;
       pt[ 2 ] /= n;

       glVertex3fv ( pt );

      } else j = a;

     }  /* end for ( i ) */

    glEnd ();

   }  /* end if */

#ifdef G004
  if ( !g_fBitmap )
#endif /* G004 */
      glEndList ();

 } else glCallList ( p -> d.dlist );

}  /* end draw_degenerates_as_points */

static void draw_degenerates_as_bboxs ( tel_indexpoly_data p ) {

 Tint*     ind, *vis;
 Tint      i, j, n, a, newList = 0;
 GLfloat   minp[ 3 ] = { FLT_MAX, FLT_MAX, FLT_MAX };
 GLfloat   maxp[ 3 ] = { FLT_MIN, FLT_MIN, FLT_MIN };
 tel_point pv;

 pv  = p -> vertices;
 ind = p -> indices;
 vis = p -> edge_vis;

 LightOff ();

#ifdef G004
 if ( g_fBitmap ) goto doDraw;
#endif /* G004 */

 if ( p -> d.degMode != 4 || !p -> d.dlist ) {

  if ( !p -> d.dlist ) p -> d.dlist = glGenLists ( 1 );

  p -> d.degMode = 4;

  glNewList ( p -> d.dlist, GL_COMPILE_AND_EXECUTE );
  newList = 1;
doDraw:
   for ( i = 0, j = 0, a = 0; i < p -> num_bounds; ++i ) {

    n = p -> bounds[ i ];
    a = j + n;

    for ( ; j < a; ++j ) {

     if ( pv[  ind[ j ]  ].xyz[ 0 ] < minp[ 0 ] )
       minp[ 0 ] = pv[  ind[ j ]  ].xyz[ 0 ] ;
     if ( pv[  ind[ j ]  ].xyz[ 1 ] < minp[ 1 ] )
       minp[ 1 ] = pv[  ind[ j ]  ].xyz[ 1 ] ;
     if ( pv[  ind[ j ]  ].xyz[ 2 ] < minp[ 2 ] )
       minp[ 2 ] = pv[  ind[ j ]  ].xyz[ 2 ] ;

     if ( pv[  ind[ j ]  ].xyz[ 0 ] > maxp[ 0 ] )
       maxp[ 0 ] = pv[  ind[ j ]  ].xyz[ 0 ] ;
     if ( pv[  ind[ j ]  ].xyz[ 1 ] > maxp[ 1 ] )
       maxp[ 1 ] = pv[  ind[ j ]  ].xyz[ 1 ] ;
     if ( pv[  ind[ j ]  ].xyz[ 2 ] > maxp[ 2 ] )
       maxp[ 2 ] = pv[  ind[ j ]  ].xyz[ 2 ] ;

    }  /* end for ( j ) */

   }  /* end for ( i ) */
  
   /* OCC11904 -- Temporarily disable environment mapping */
   glPushAttrib(GL_ENABLE_BIT);
   glDisable(GL_TEXTURE_1D);
   glDisable(GL_TEXTURE_2D);

   glBegin ( GL_LINE_STRIP );

   glVertex3fv ( minp );
   glVertex3f ( minp[ 0 ], maxp[ 1 ], minp[ 2 ] );
   glVertex3f ( minp[ 0 ], maxp[ 1 ], maxp[ 2 ] );
   glVertex3f ( minp[ 0 ], minp[ 1 ], maxp[ 2 ] );
   glVertex3f ( minp[ 0 ], minp[ 1 ], minp[ 2 ] );

   glVertex3f ( maxp[ 0 ], minp[ 1 ], minp[ 2 ] );
   glVertex3f ( maxp[ 0 ], maxp[ 1 ], minp[ 2 ] );
   glVertex3f ( maxp[ 0 ], maxp[ 1 ], maxp[ 2 ] );
   glVertex3f ( maxp[ 0 ], minp[ 1 ], maxp[ 2 ] );
   glVertex3f ( maxp[ 0 ], minp[ 1 ], minp[ 2 ] );

   glVertex3f ( maxp[ 0 ], minp[ 1 ], maxp[ 2 ] );
   glVertex3f ( minp[ 0 ], minp[ 1 ], maxp[ 2 ] );
   glVertex3f ( minp[ 0 ], maxp[ 1 ], maxp[ 2 ] );
   glVertex3fv ( maxp );
   glVertex3f ( maxp[ 0 ], maxp[ 1 ], minp[ 2 ] );
   glVertex3f ( minp[ 0 ], maxp[ 1 ], minp[ 2 ] );

   glEnd();
   glPopAttrib();
#ifdef G004
  if ( !g_fBitmap )
#endif /* G004 */
      glEndList ();

 } else glCallList ( p -> d.dlist );

}  /* end draw_degenerates_as_bboxs */
#endif  /* G003 */

void set_drawable_items ( GLboolean* pbDraw, int n ) {

 int i;

 memset (  pbDraw, 0, sizeof ( GLboolean ) * n  );

 i = ( int )(  ( 1.0F - g_fSkipRatio ) * n  );

 while ( i-- ) pbDraw[ OPENGL_RAND() % n ] = 1;

}  /* end set_drawable_items */

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