gl_mesh.c

Go to the documentation of this file.

/* $Id: gl_mesh.c,v 1.3 2002/09/25 13:22:55 bburns Exp $
 *
 * triangle model functions
 *
 * Copyright (C) 1997-2001 Id Software, Inc.
 * Copyright (c) 2002 The Quakeforge Project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
#include "gl_local.h"
 
/*
=============================================================
 
  ALIAS MODELS
 
=============================================================
*/
 
#define NUMVERTEXNORMALS    162
 
float   r_avertexnormals[NUMVERTEXNORMALS][3] = {
#include "anorms.h"
};
 
typedef float vec4_t[4];
 
static  vec4_t  s_lerped[MAX_VERTS];
//static    vec3_t  lerped[MAX_VERTS];
 
vec3_t  shadevector;
float   shadelight[3];
 
// precalculated dot products for quantized angles
#define SHADEDOT_QUANT 16
float   r_avertexnormal_dots[SHADEDOT_QUANT][256] =
#include "anormtab.h"
;
 
float   *shadedots = r_avertexnormal_dots[0];
 
void GL_LerpVerts( int nverts, dtrivertx_t *v, dtrivertx_t *ov, dtrivertx_t *verts, float *lerp, float move[3], float frontv[3], float backv[3] )
{
    int i;
 
    //PMM -- added RF_SHELL_DOUBLE, RF_SHELL_HALF_DAM
    if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
    {
        for (i=0 ; i < nverts; i++, v++, ov++, lerp+=4 )
        {
            float *normal = r_avertexnormals[verts[i].lightnormalindex];
 
            lerp[0] = move[0] + ov->v[0]*backv[0] + v->v[0]*frontv[0] + normal[0] * POWERSUIT_SCALE;
            lerp[1] = move[1] + ov->v[1]*backv[1] + v->v[1]*frontv[1] + normal[1] * POWERSUIT_SCALE;
            lerp[2] = move[2] + ov->v[2]*backv[2] + v->v[2]*frontv[2] + normal[2] * POWERSUIT_SCALE; 
        }
    }
    else
    {
        for (i=0 ; i < nverts; i++, v++, ov++, lerp+=4)
        {
            lerp[0] = move[0] + ov->v[0]*backv[0] + v->v[0]*frontv[0];
            lerp[1] = move[1] + ov->v[1]*backv[1] + v->v[1]*frontv[1];
            lerp[2] = move[2] + ov->v[2]*backv[2] + v->v[2]*frontv[2];
        }
    }
 
}
 
/*
=============
GL_DrawAliasFrameLerp
 
interpolates between two frames and origins
FIXME: batch lerp all vertexes
=============
*/
void GL_DrawAliasFrameLerp (dmdl_t *paliashdr, float backlerp)
{
    float   l;
    daliasframe_t   *frame, *oldframe;
    dtrivertx_t *v, *ov, *verts;
    int     *order;
    int     count;
    float   frontlerp;
    float   alpha;
    vec3_t  move, delta, vectors[3];
    vec3_t  frontv, backv;
    int     i;
    int     index_xyz;
    float   *lerp;
 
    frame = (daliasframe_t *)((byte *)paliashdr + paliashdr->ofs_frames 
        + currententity->frame * paliashdr->framesize);
    verts = v = frame->verts;
 
    oldframe = (daliasframe_t *)((byte *)paliashdr + paliashdr->ofs_frames 
        + currententity->oldframe * paliashdr->framesize);
    ov = oldframe->verts;
 
    order = (int *)((byte *)paliashdr + paliashdr->ofs_glcmds);
 
//  glTranslatef (frame->translate[0], frame->translate[1], frame->translate[2]);
//  glScalef (frame->scale[0], frame->scale[1], frame->scale[2]);
 
    if (currententity->flags & RF_TRANSLUCENT)
        alpha = currententity->alpha;
    else
        alpha = 1.0;
 
    // PMM - added double shell
    if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
        qglDisable( GL_TEXTURE_2D );
 
    frontlerp = 1.0 - backlerp;
 
    // move should be the delta back to the previous frame * backlerp
    VectorSubtract (currententity->oldorigin, currententity->origin, delta);
    AngleVectors (currententity->angles, vectors[0], vectors[1], vectors[2]);
 
    move[0] = DotProduct (delta, vectors[0]);   // forward
    move[1] = -DotProduct (delta, vectors[1]);  // left
    move[2] = DotProduct (delta, vectors[2]);   // up
 
    VectorAdd (move, oldframe->translate, move);
 
    for (i=0 ; i<3 ; i++)
    {
        move[i] = backlerp*move[i] + frontlerp*frame->translate[i];
    }
 
    for (i=0 ; i<3 ; i++)
    {
        frontv[i] = frontlerp*frame->scale[i];
        backv[i] = backlerp*oldframe->scale[i];
    }
 
    lerp = s_lerped[0];
 
    GL_LerpVerts( paliashdr->num_xyz, v, ov, verts, lerp, move, frontv, backv );
 
    if ( gl_vertex_arrays->value )
    {
        float colorArray[MAX_VERTS*4];
 
        qglEnableClientState( GL_VERTEX_ARRAY );
        qglVertexPointer( 3, GL_FLOAT, 16, s_lerped );  // padded for SIMD
 
//      if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE ) )
        // PMM - added double damage shell
        if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
        {
            qglColor4f( shadelight[0], shadelight[1], shadelight[2], alpha );
        }
        else
        {
            qglEnableClientState( GL_COLOR_ARRAY );
            qglColorPointer( 3, GL_FLOAT, 0, colorArray );
 
            //
            // pre light everything
            //
            for ( i = 0; i < paliashdr->num_xyz; i++ )
            {
                float l = shadedots[verts[i].lightnormalindex];
 
                colorArray[i*3+0] = l * shadelight[0];
                colorArray[i*3+1] = l * shadelight[1];
                colorArray[i*3+2] = l * shadelight[2];
            }
        }
 
        if ( qglLockArraysEXT != 0 )
            qglLockArraysEXT( 0, paliashdr->num_xyz );
 
        while (1)
        {
            // get the vertex count and primitive type
            count = *order++;
            if (!count)
                break;      // done
            if (count < 0)
            {
                count = -count;
                qglBegin (GL_TRIANGLE_FAN);
            }
            else
            {
                qglBegin (GL_TRIANGLE_STRIP);
            }
 
            // PMM - added double damage shell
            if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
            {
                do
                {
                    index_xyz = order[2];
                    order += 3;
 
                    qglVertex3fv( s_lerped[index_xyz] );
 
                } while (--count);
            }
            else
            {
                do
                {
                    // texture coordinates come from the draw list
                    qglTexCoord2f (((float *)order)[0], ((float *)order)[1]);
                    index_xyz = order[2];
 
                    order += 3;
 
                    // normals and vertexes come from the frame list
//                  l = shadedots[verts[index_xyz].lightnormalindex];
                    
//                  qglColor4f (l* shadelight[0], l*shadelight[1], l*shadelight[2], alpha);
                    qglArrayElement( index_xyz );
 
                } while (--count);
            }
            qglEnd ();
        }
 
        if ( qglUnlockArraysEXT != 0 )
            qglUnlockArraysEXT();
    }
    else
    {
        while (1)
        {
            // get the vertex count and primitive type
            count = *order++;
            if (!count)
                break;      // done
            if (count < 0)
            {
                count = -count;
                qglBegin (GL_TRIANGLE_FAN);
            }
            else
            {
                qglBegin (GL_TRIANGLE_STRIP);
            }
 
            if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE ) )
            {
                do
                {
                    index_xyz = order[2];
                    order += 3;
 
                    qglColor4f( shadelight[0], shadelight[1], shadelight[2], alpha);
                    qglVertex3fv (s_lerped[index_xyz]);
 
                } while (--count);
            }
            else
            {
                do
                {
                    // texture coordinates come from the draw list
                    qglTexCoord2f (((float *)order)[0], ((float *)order)[1]);
                    index_xyz = order[2];
                    order += 3;
 
                    // normals and vertexes come from the frame list
                    l = shadedots[verts[index_xyz].lightnormalindex];
                    
                    qglColor4f (l* shadelight[0], l*shadelight[1], l*shadelight[2], alpha);
                    qglVertex3fv (s_lerped[index_xyz]);
                } while (--count);
            }
 
            qglEnd ();
        }
    }
 
//  if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE ) )
    // PMM - added double damage shell
    if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_GREEN | RF_SHELL_BLUE | RF_SHELL_DOUBLE | RF_SHELL_HALF_DAM) )
        qglEnable( GL_TEXTURE_2D );
}
 
 
#if 1
/*
=============
GL_DrawAliasShadow
=============
*/
extern  vec3_t          lightspot;
/* stencilbuffer shadows */
extern qboolean have_stencil;
 
void GL_DrawAliasShadow (dmdl_t *paliashdr, int posenum)
{
    dtrivertx_t *verts;
    int     *order;
    vec3_t  point;
    float   height, lheight;
    int     count;
    daliasframe_t   *frame;
 
    lheight = currententity->origin[2] - lightspot[2];
 
    frame = (daliasframe_t *)((byte *)paliashdr + paliashdr->ofs_frames 
        + currententity->frame * paliashdr->framesize);
    verts = frame->verts;
 
    height = 0;
 
    order = (int *)((byte *)paliashdr + paliashdr->ofs_glcmds);
 
    height = -lheight + 0.1f;
 
    /* stencilbuffer shadows */
    if (have_stencil && gl_stencilshadow->value) {
        qglEnable(GL_STENCIL_TEST);
        qglStencilFunc(GL_EQUAL, 1, 2);
        qglStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
    }
 
    while (1)
    {
        // get the vertex count and primitive type
        count = *order++;
        if (!count)
            break;      // done
        if (count < 0)
        {
            count = -count;
            qglBegin (GL_TRIANGLE_FAN);
        }
        else
            qglBegin (GL_TRIANGLE_STRIP);
 
        do
        {
            // normals and vertexes come from the frame list
/*
            point[0] = verts[order[2]].v[0] * frame->scale[0] + frame->translate[0];
            point[1] = verts[order[2]].v[1] * frame->scale[1] + frame->translate[1];
            point[2] = verts[order[2]].v[2] * frame->scale[2] + frame->translate[2];
*/
 
            memcpy( point, s_lerped[order[2]], sizeof( point )  );
 
            point[0] -= shadevector[0]*(point[2]+lheight);
            point[1] -= shadevector[1]*(point[2]+lheight);
            point[2] = height;
//          height -= 0.001;
            qglVertex3fv (point);
 
            order += 3;
 
//          verts++;
 
        } while (--count);
 
        qglEnd ();
    }
 
    /* stencilbuffer shadows */
    if (have_stencil && gl_stencilshadow->value)
        qglDisable(GL_STENCIL_TEST);
}
 
#endif
 
/*
** R_CullAliasModel
*/
static qboolean R_CullAliasModel( vec3_t bbox[8], entity_t *e )
{
    int i;
    vec3_t      mins, maxs;
    dmdl_t      *paliashdr;
    vec3_t      vectors[3];
    vec3_t      thismins, oldmins, thismaxs, oldmaxs;
    daliasframe_t *pframe, *poldframe;
    vec3_t angles;
 
    paliashdr = (dmdl_t *)currentmodel->extradata;
 
    if ( ( e->frame >= paliashdr->num_frames ) || ( e->frame < 0 ) )
    {
        ri.Con_Printf (PRINT_ALL, "R_CullAliasModel %s: no such frame %d\n", 
            currentmodel->name, e->frame);
        e->frame = 0;
    }
    if ( ( e->oldframe >= paliashdr->num_frames ) || ( e->oldframe < 0 ) )
    {
        ri.Con_Printf (PRINT_ALL, "R_CullAliasModel %s: no such oldframe %d\n", 
            currentmodel->name, e->oldframe);
        e->oldframe = 0;
    }
 
    pframe = ( daliasframe_t * ) ( ( byte * ) paliashdr + 
                                      paliashdr->ofs_frames +
                                      e->frame * paliashdr->framesize);
 
    poldframe = ( daliasframe_t * ) ( ( byte * ) paliashdr + 
                                      paliashdr->ofs_frames +
                                      e->oldframe * paliashdr->framesize);
 
    /*
    ** compute axially aligned mins and maxs
    */
    if ( pframe == poldframe )
    {
        for ( i = 0; i < 3; i++ )
        {
            mins[i] = pframe->translate[i];
            maxs[i] = mins[i] + pframe->scale[i]*255;
        }
    }
    else
    {
        for ( i = 0; i < 3; i++ )
        {
            thismins[i] = pframe->translate[i];
            thismaxs[i] = thismins[i] + pframe->scale[i]*255;
 
            oldmins[i]  = poldframe->translate[i];
            oldmaxs[i]  = oldmins[i] + poldframe->scale[i]*255;
 
            if ( thismins[i] < oldmins[i] )
                mins[i] = thismins[i];
            else
                mins[i] = oldmins[i];
 
            if ( thismaxs[i] > oldmaxs[i] )
                maxs[i] = thismaxs[i];
            else
                maxs[i] = oldmaxs[i];
        }
    }
 
    /*
    ** compute a full bounding box
    */
    for ( i = 0; i < 8; i++ )
    {
        vec3_t   tmp;
 
        if ( i & 1 )
            tmp[0] = mins[0];
        else
            tmp[0] = maxs[0];
 
        if ( i & 2 )
            tmp[1] = mins[1];
        else
            tmp[1] = maxs[1];
 
        if ( i & 4 )
            tmp[2] = mins[2];
        else
            tmp[2] = maxs[2];
 
        VectorCopy( tmp, bbox[i] );
    }
 
    /*
    ** rotate the bounding box
    */
    VectorCopy( e->angles, angles );
    angles[YAW] = -angles[YAW];
    AngleVectors( angles, vectors[0], vectors[1], vectors[2] );
 
    for ( i = 0; i < 8; i++ )
    {
        vec3_t tmp;
 
        VectorCopy( bbox[i], tmp );
 
        bbox[i][0] = DotProduct( vectors[0], tmp );
        bbox[i][1] = -DotProduct( vectors[1], tmp );
        bbox[i][2] = DotProduct( vectors[2], tmp );
 
        VectorAdd( e->origin, bbox[i], bbox[i] );
    }
 
    {
        int p, f, aggregatemask = ~0;
 
        for ( p = 0; p < 8; p++ )
        {
            int mask = 0;
 
            for ( f = 0; f < 4; f++ )
            {
                float dp = DotProduct( frustum[f].normal, bbox[p] );
 
                if ( ( dp - frustum[f].dist ) < 0 )
                {
                    mask |= ( 1 << f );
                }
            }
 
            aggregatemask &= mask;
        }
 
        if ( aggregatemask )
        {
            return true;
        }
 
        return false;
    }
}
 
/*
=================
R_DrawAliasModel
 
=================
*/
void R_DrawAliasModel (entity_t *e)
{
    int         i;
    dmdl_t      *paliashdr;
    float       an;
    vec3_t      bbox[8];
    image_t     *skin;
 
    if ( !( e->flags & RF_WEAPONMODEL ) )
    {
        if ( R_CullAliasModel( bbox, e ) )
            return;
    }
 
    if ( e->flags & RF_WEAPONMODEL )
    {
        if ( r_lefthand->value == 2 )
            return;
    }
 
    paliashdr = (dmdl_t *)currentmodel->extradata;
 
    //
    // get lighting information
    //
    // PMM - rewrote, reordered to handle new shells & mixing
    // PMM - 3.20 code .. replaced with original way of doing it to keep mod authors happy
    //
    if ( currententity->flags & ( RF_SHELL_HALF_DAM | RF_SHELL_GREEN | RF_SHELL_RED | RF_SHELL_BLUE | RF_SHELL_DOUBLE ) )
    {
        VectorClear (shadelight);
        if (currententity->flags & RF_SHELL_HALF_DAM)
        {
                shadelight[0] = 0.56;
                shadelight[1] = 0.59;
                shadelight[2] = 0.45;
        }
        if ( currententity->flags & RF_SHELL_DOUBLE )
        {
            shadelight[0] = 0.9;
            shadelight[1] = 0.7;
        }
        if ( currententity->flags & RF_SHELL_RED )
            shadelight[0] = 1.0;
        if ( currententity->flags & RF_SHELL_GREEN )
            shadelight[1] = 1.0;
        if ( currententity->flags & RF_SHELL_BLUE )
            shadelight[2] = 1.0;
    }
/*
        // PMM -special case for godmode
        if ( (currententity->flags & RF_SHELL_RED) &&
            (currententity->flags & RF_SHELL_BLUE) &&
            (currententity->flags & RF_SHELL_GREEN) )
        {
            for (i=0 ; i<3 ; i++)
                shadelight[i] = 1.0;
        }
        else if ( currententity->flags & ( RF_SHELL_RED | RF_SHELL_BLUE | RF_SHELL_DOUBLE ) )
        {
            VectorClear (shadelight);
 
            if ( currententity->flags & RF_SHELL_RED )
            {
                shadelight[0] = 1.0;
                if (currententity->flags & (RF_SHELL_BLUE|RF_SHELL_DOUBLE) )
                    shadelight[2] = 1.0;
            }
            else if ( currententity->flags & RF_SHELL_BLUE )
            {
                if ( currententity->flags & RF_SHELL_DOUBLE )
                {
                    shadelight[1] = 1.0;
                    shadelight[2] = 1.0;
                }
                else
                {
                    shadelight[2] = 1.0;
                }
            }
            else if ( currententity->flags & RF_SHELL_DOUBLE )
            {
                shadelight[0] = 0.9;
                shadelight[1] = 0.7;
            }
        }
        else if ( currententity->flags & ( RF_SHELL_HALF_DAM | RF_SHELL_GREEN ) )
        {
            VectorClear (shadelight);
            // PMM - new colors
            if ( currententity->flags & RF_SHELL_HALF_DAM )
            {
                shadelight[0] = 0.56;
                shadelight[1] = 0.59;
                shadelight[2] = 0.45;
            }
            if ( currententity->flags & RF_SHELL_GREEN )
            {
                shadelight[1] = 1.0;
            }
        }
    }
            //PMM - ok, now flatten these down to range from 0 to 1.0.
    //      max_shell_val = max(shadelight[0], max(shadelight[1], shadelight[2]));
    //      if (max_shell_val > 0)
    //      {
    //          for (i=0; i<3; i++)
    //          {
    //              shadelight[i] = shadelight[i] / max_shell_val;
    //          }
    //      }
    // pmm
*/
    else if ( currententity->flags & RF_FULLBRIGHT )
    {
        for (i=0 ; i<3 ; i++)
            shadelight[i] = 1.0;
    }
    else
    {
        R_LightPoint (currententity->origin, shadelight);
 
        // player lighting hack for communication back to server
        // big hack!
        if ( currententity->flags & RF_WEAPONMODEL )
        {
            // pick the greatest component, which should be the same
            // as the mono value returned by software
            if (shadelight[0] > shadelight[1])
            {
                if (shadelight[0] > shadelight[2])
                    r_lightlevel->value = 150*shadelight[0];
                else
                    r_lightlevel->value = 150*shadelight[2];
            }
            else
            {
                if (shadelight[1] > shadelight[2])
                    r_lightlevel->value = 150*shadelight[1];
                else
                    r_lightlevel->value = 150*shadelight[2];
            }
 
        }
        
        if ( gl_monolightmap->string[0] != '0' )
        {
            float s = shadelight[0];
 
            if ( s < shadelight[1] )
                s = shadelight[1];
            if ( s < shadelight[2] )
                s = shadelight[2];
 
            shadelight[0] = s;
            shadelight[1] = s;
            shadelight[2] = s;
        }
    }
 
    if ( currententity->flags & RF_MINLIGHT )
    {
        for (i=0 ; i<3 ; i++)
            if (shadelight[i] > 0.1)
                break;
        if (i == 3)
        {
            shadelight[0] = 0.1;
            shadelight[1] = 0.1;
            shadelight[2] = 0.1;
        }
    }
 
    if ( currententity->flags & RF_GLOW )
    {   // bonus items will pulse with time
        float   scale;
        float   min;
 
        scale = 0.1 * sin(r_newrefdef.time*7);
        for (i=0 ; i<3 ; i++)
        {
            min = shadelight[i] * 0.8;
            shadelight[i] += scale;
            if (shadelight[i] < min)
                shadelight[i] = min;
        }
    }
 
// =================
// PGM  ir goggles color override
    if ( r_newrefdef.rdflags & RDF_IRGOGGLES && currententity->flags & RF_IR_VISIBLE)
    {
        shadelight[0] = 1.0;
        shadelight[1] = 0.0;
        shadelight[2] = 0.0;
    }
// PGM  
// =================
 
    shadedots = r_avertexnormal_dots[((int)(currententity->angles[1] * (SHADEDOT_QUANT / 360.0))) & (SHADEDOT_QUANT - 1)];
    
    an = currententity->angles[1]/180*M_PI;
    shadevector[0] = cos(-an);
    shadevector[1] = sin(-an);
    shadevector[2] = 1;
    VectorNormalize (shadevector);
 
    //
    // locate the proper data
    //
 
    c_alias_polys += paliashdr->num_tris;
 
    //
    // draw all the triangles
    //
    if (currententity->flags & RF_DEPTHHACK) // hack the depth range to prevent view model from poking into walls
        qglDepthRange (gldepthmin, gldepthmin + 0.3*(gldepthmax-gldepthmin));
 
    if ( ( currententity->flags & RF_WEAPONMODEL ) && ( r_lefthand->value == 1.0F ) )
    {
        extern void MYgluPerspective( GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar );
 
        qglMatrixMode( GL_PROJECTION );
        qglPushMatrix();
        qglLoadIdentity();
        qglScalef( -1, 1, 1 );
        MYgluPerspective( r_newrefdef.fov_y, ( float ) r_newrefdef.width / r_newrefdef.height,  4,  4096);
        qglMatrixMode( GL_MODELVIEW );
 
        qglCullFace( GL_BACK );
    }
 
    qglPushMatrix ();
    e->angles[PITCH] = -e->angles[PITCH];   // sigh.
    R_RotateForEntity (e);
    e->angles[PITCH] = -e->angles[PITCH];   // sigh.
 
    // select skin
    if (currententity->skin)
        skin = currententity->skin; // custom player skin
    else
    {
        if (currententity->skinnum >= MAX_MD2SKINS)
            skin = currentmodel->skins[0];
        else
        {
            skin = currentmodel->skins[currententity->skinnum];
            if (!skin)
                skin = currentmodel->skins[0];
        }
    }
    if (!skin)
        skin = r_notexture; // fallback...
    GL_Bind(skin->texnum);
 
    // draw it
 
    qglShadeModel (GL_SMOOTH);
 
    GL_TexEnv( GL_MODULATE );
    if ( currententity->flags & RF_TRANSLUCENT )
    {
        qglEnable (GL_BLEND);
    }
 
 
    if ( (currententity->frame >= paliashdr->num_frames) 
        || (currententity->frame < 0) )
    {
        ri.Con_Printf (PRINT_ALL, "R_DrawAliasModel %s: no such frame %d\n",
            currentmodel->name, currententity->frame);
        currententity->frame = 0;
        currententity->oldframe = 0;
    }
 
    if ( (currententity->oldframe >= paliashdr->num_frames)
        || (currententity->oldframe < 0))
    {
        ri.Con_Printf (PRINT_ALL, "R_DrawAliasModel %s: no such oldframe %d\n",
            currentmodel->name, currententity->oldframe);
        currententity->frame = 0;
        currententity->oldframe = 0;
    }
 
    if ( !r_lerpmodels->value )
        currententity->backlerp = 0;
    GL_DrawAliasFrameLerp (paliashdr, currententity->backlerp);
 
    GL_TexEnv( GL_REPLACE );
    qglShadeModel (GL_FLAT);
 
    qglPopMatrix ();
 
#if 0
    qglDisable( GL_CULL_FACE );
    qglPolygonMode( GL_FRONT_AND_BACK, GL_LINE );
    qglDisable( GL_TEXTURE_2D );
    qglBegin( GL_TRIANGLE_STRIP );
    for ( i = 0; i < 8; i++ )
    {
        qglVertex3fv( bbox[i] );
    }
    qglEnd();
    qglEnable( GL_TEXTURE_2D );
    qglPolygonMode( GL_FRONT_AND_BACK, GL_FILL );
    qglEnable( GL_CULL_FACE );
#endif
 
    if ( ( currententity->flags & RF_WEAPONMODEL ) && ( r_lefthand->value == 1.0F ) )
    {
        qglMatrixMode( GL_PROJECTION );
        qglPopMatrix();
        qglMatrixMode( GL_MODELVIEW );
        qglCullFace( GL_FRONT );
    }
 
    if ( currententity->flags & RF_TRANSLUCENT )
    {
        qglDisable (GL_BLEND);
    }
 
    if (currententity->flags & RF_DEPTHHACK)
        qglDepthRange (gldepthmin, gldepthmax);
 
//#if 1
    if (gl_shadows->value && 
        !(currententity->flags & (RF_TRANSLUCENT|RF_WEAPONMODEL|RF_NOSHADOW))) {
        qglPushMatrix ();
 
        /* don't rotate shadows on ungodly axes */
        qglTranslatef(e->origin[0], e->origin[1], e->origin[2]);
        qglRotatef(e->angles[1], 0, 0, 1);
 
        qglDisable (GL_TEXTURE_2D);
        qglEnable (GL_BLEND);
        qglColor4f (0,0,0,0.5);
        GL_DrawAliasShadow (paliashdr, currententity->frame );
        qglEnable (GL_TEXTURE_2D);
        qglDisable (GL_BLEND);
        qglPopMatrix ();
    }
//#endif
    qglColor4f (1,1,1,1);
}