ECLASS.CPP

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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.

This file is part of Quake III Arena source code.

Quake III Arena source code 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.

Quake III Arena source code 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 Foobar; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
===========================================================================
*/
#include "stdafx.h"
#include "qe3.h"
#include "io.h"
#include "pakstuff.h"
//#include "qertypes.h"

eclass_t    *eclass = NULL;
eclass_t    *eclass_bad = NULL;
char        eclass_directory[1024];

// md3 cache for misc_models
eclass_t *g_md3Cache = NULL;

/*

the classname, color triple, and bounding box are parsed out of comments
A ? size means take the exact brush size.

/*QUAKED <classname> (0 0 0) ?
/*QUAKED <classname> (0 0 0) (-8 -8 -8) (8 8 8)

Flag names can follow the size description:

/*QUAKED func_door (0 .5 .8) ? START_OPEN STONE_SOUND DOOR_DONT_LINK GOLD_KEY SILVER_KEY

*/

void CleanEntityList(eclass_t *&pList)
{
  while (pList)
  {
    eclass_t* pTemp = pList->next;

    entitymodel *model = pList->model;
    while (model != NULL)
    {
      delete []model->pTriList;
      model = model->pNext;
    }
    
    if (pList->modelpath)
      free(pList->modelpath);
      if (pList->skinpath)          // PGM
          free(pList->skinpath);        // PGM
    
    free(pList->name);
    free(pList->comments);
    free(pList);
    pList = pTemp;
  }

  pList = NULL;

}


void CleanUpEntities()
{
  CleanEntityList(eclass);
  CleanEntityList(g_md3Cache);
/*
  while (eclass)
  {
    eclass_t* pTemp = eclass->next;
    delete []eclass->pTriList;
    
    if (eclass->modelpath)
      free(eclass->modelpath);
      if (eclass->skinpath)         // PGM
          free(eclass->skinpath);       // PGM
    
    free(eclass->name);
    free(eclass->comments);
    free(eclass);
    eclass = pTemp;
  }

  eclass = NULL;
*/
  if (eclass_bad)
  {
    free(eclass_bad->name);
    free(eclass_bad->comments);
    free(eclass_bad);
    eclass_bad = NULL;
  }
}

void ExtendBounds(vec3_t v, vec3_t &vMin, vec3_t &vMax)
{
    for (int i = 0 ;i < 3 ;i++)
    {
        vec_t f = v[i];
        
    if (f < vMin[i])
    {
            vMin[i] = f;
    }

    if (f > vMax[i])
    {
            vMax[i] = f;
    }
    }
}



// FIXME: this code is a TOTAL clusterfuck
//
void LoadModel(const char *pLocation, eclass_t *e, vec3_t &vMin, vec3_t &vMax, entitymodel *&pModel, const char *pSkin)
{
  // this assumes a path only and uses tris.md2
  // for the model and skin.pcx for the skin
  char cPath[1024];
  char cSkin[1024];
  char cFullLocation[1024];
    //struct _finddata_t fileinfo;

  vMin[0] = vMin[1] = vMin[2] = 99999;
  vMax[0] = vMax[1] = vMax[2] = -99999;

  bool bMD3 = false;
  bool bASE = false;

  strcpy( cFullLocation, pLocation );

  if (strstr(pLocation, ".md3"))
  {
    bMD3 = true;
  }
  else if (strstr(pLocation, ".md2") != NULL)
  {
      sprintf( cFullLocation, "%stris.md2", pLocation);
  }
  else if (strstr(pLocation, ".ase") != NULL)
  {
    bASE = true;
  }

  sprintf( cPath, "%s/%s", ValueForKey(g_qeglobals.d_project_entity, "basepath"), cFullLocation);

  Sys_Printf("Loading model %s...", cPath);
  unsigned char* p = NULL;
  bool bOpen = (LoadFile(cPath, reinterpret_cast<void**>(&p)) > 0);
  if (!bOpen)
  {
    Sys_Printf(" failed. Trying PAK file...");
//    sprintf (cPath, "%stris.md2", pLocation);
      strcpy (cPath, cFullLocation);
      bOpen = (PakLoadAnyFile(cPath, reinterpret_cast<void**>(&p)) > 0);
  }

  if (bOpen)
  {
    Sys_Printf(" successful.\n");

    if (bASE)
    {
/*
      free(p);
      CString strOut;
      ::GetTempPath(1024, strOut.GetBuffer(1024));
      strOut.ReleaseBuffer();
      AddSlash(strOut);
      strOut += "Temp.ase";
      CopyFile(cPath, strOut, false);
      CString strIn = strOut;
      FindReplace(strOut, ".ase", ".md3");
      strcpy(cPath, strIn);
      strcpy(cSkin, strOut);
      Q3Data_ProduceTempMD3(ValueForKey(g_qeglobals.d_project_entity, "basepath"), cPath, cSkin);
      CString strModel = cPath;
      if (LoadFile(strOut.GetBuffer(0), reinterpret_cast<void**>(&p)) == 0)
      {
        Sys_Printf(" Conversion from ASE failed.\n");
        return;
      }
      bMD3 = true;
*/
    }

    if (bMD3)
    {
        md3Header_t header;
        md3Surface_t *pSurface;
        header = *(md3Header_t *)p;
      if (pSkin != NULL)
      {
        strcpy(cSkin, pSkin);
      }
        else
      {
            cSkin[0] = '\0';
      }
      int n = header.numFrames;
        pSurface = (md3Surface_t *) (p + header.ofsSurfaces);
        for (int z = 0; z < header.numSurfaces; z++ )
        {
        int nTris = pSurface->numTriangles;
        
        //unsigned char* pTris = reinterpret_cast<unsigned char*>(pSurface);
        //pTris += pSurface->ofsTriangles;

        if (nTris > 0)
        {
          int nStart = 0;
          if (pModel->pTriList == NULL)
          {
                pModel->nModelPosition = 0;
            pModel->pTriList = new trimodel[nTris];
            pModel->nTriCount = nTris;
          }
          else
          {
            // already have one so we need to reallocate
            int nNewCount = pModel->nTriCount + nTris;
            trimodel* pNewModels = new trimodel[nNewCount];
            for (int i = 0; i < pModel->nTriCount; i++)
            {
              memcpy(&pNewModels[i], &pModel->pTriList[i], sizeof(trimodel));
            }
            nStart = pModel->nTriCount;
            pModel->nTriCount = nNewCount;
            //nTris = nNewCount;
            delete [] pModel->pTriList;
            pModel->pTriList = pNewModels;
          }
          
          md3Triangle_t *pTris = reinterpret_cast<md3Triangle_t*>((reinterpret_cast<unsigned char*>(pSurface) + pSurface->ofsTriangles));
          md3XyzNormal_t *pXyz = reinterpret_cast<md3XyzNormal_t*>((reinterpret_cast<unsigned char*>(pSurface) + pSurface->ofsXyzNormals));
          if (e->nFrame < pSurface->numFrames)
          {
            pXyz += (e->nFrame * pSurface->numVerts);
          }

          md3St_t *pST = reinterpret_cast<md3St_t*>((reinterpret_cast<unsigned char*>(pSurface) + pSurface->ofsSt)); 

          for (int i = 0; i < nTris; i++)
          {
            for (int k = 0; k < 3; k ++)
            {
              for (int j = 0; j < 3; j++)
              {
                //e->pTriList[i].v[k][j] = (f->verts[tri.index_xyz[k]].v[j] * f->scale[j] + f->translate[j]);
                pModel->pTriList[nStart].v[k][j] = pXyz[pTris[i].indexes[k]].xyz[j] * MD3_XYZ_SCALE;
              }
                  pModel->pTriList[nStart].st[k][0] = pST[pTris[i].indexes[k]].st[0];
                  pModel->pTriList[nStart].st[k][1] = pST[pTris[i].indexes[k]].st[1];
                  ExtendBounds (pModel->pTriList[nStart].v[k], vMin, vMax);
                }
            nStart++;
              }

        }

        md3Shader_t *pShader = reinterpret_cast<md3Shader_t*>((reinterpret_cast<unsigned char*>(pSurface) + pSurface->ofsShaders)); 
        sprintf (cPath, "%s/%s", ValueForKey(g_qeglobals.d_project_entity, "basepath"), pShader->name);
        strlwr(cPath);
          pModel->nTextureBind = Texture_LoadSkin(cPath, &pModel->nSkinWidth, &pModel->nSkinHeight);
        if (pModel->nTextureBind == -1)
        {
          Sys_Printf("Model skin load failed on texture %s\n", cPath);
        }
            pSurface = (md3Surface_t *) ((( char * ) pSurface) + pSurface->ofsEnd);
        pModel->pNext = reinterpret_cast<entitymodel_t*>(qmalloc(sizeof(entitymodel_t)));
        pModel = pModel->pNext;
      }
    }
    else
    {

      dmdl_t model;
      daliasframe_t *f;
      unsigned char* pTris = p;
      dstvert_t *pST = NULL;
      int nTris = 0;

      // grab model params
      memcpy(&model, p, sizeof(dmdl_t));
      f = (daliasframe_t*)(p + model.ofs_frames);
      pTris += model.ofs_tris;
      pST = reinterpret_cast<dstvert_t*>(p + model.ofs_st);
      nTris = model.num_tris;

        if(pSkin)
        {
            strcpy (cSkin, pSkin);
            if ((cSkin[strlen(cSkin)-1] == '\\') || (cSkin[strlen(cSkin)-1] == '/'))
                strcat(cSkin, "skin.pcx\0");
        }
        else
      {
            strcpy(cSkin, (char *)(p + model.ofs_skins));
      }

      sprintf (cPath, "%s/%s", ValueForKey(g_qeglobals.d_project_entity, "basepath"), cSkin);
      strlwr(cPath);
      pModel->nTextureBind = Texture_LoadSkin(cPath, &pModel->nSkinWidth, &pModel->nSkinHeight);
      if (pModel->nTextureBind == -1)
      {
        Sys_Printf("Model skin load failed on texture %s\n", cPath);
      }
      int nStart = 0;
      if (pModel->pTriList == NULL)
      {
            pModel->nModelPosition = 0;
        pModel->pTriList = new trimodel[nTris];
        pModel->nTriCount = nTris;
      }
      else
      {
        // already have one so we need to reallocate
        int nNewCount = pModel->nTriCount + nTris;
        trimodel* pNewModels = new trimodel[nNewCount];
        for (int i = 0; i < pModel->nTriCount; i++)
        {
          memcpy(&pNewModels[i], &pModel->pTriList[i], sizeof(trimodel));
        }
        nStart = pModel->nTriCount;
        pModel->nTriCount = nNewCount;
        nTris = nNewCount;
        delete [] pModel->pTriList;
        pModel->pTriList = pNewModels;
      }
      
      for (int i = nStart; i < nTris; i++)
      {
        dtriangle_t tri;
        memcpy(&tri, pTris, sizeof(dtriangle_t));
        for (int k = 0; k < 3; k ++)
        {
          for (int j = 0; j < 3; j++)
          {
            pModel->pTriList[i].v[k][j] = (f->verts[tri.index_xyz[k]].v[j] * f->scale[j] + f->translate[j]);
          }

          pModel->pTriList[i].st[k][0] = pST[tri.index_st[k]].s / pModel->nSkinWidth;
          pModel->pTriList[i].st[k][1] = pST[tri.index_st[k]].t / pModel->nSkinHeight;;
          ExtendBounds (pModel->pTriList[i].v[k], vMin, vMax);
            }
        pTris += sizeof(dtriangle_t);
          }
    }
    free(p);
  }
  else
  {
    Sys_Printf(" failed.\n");
  }

#if 0
  if (pModel->pTriList != NULL && pModel->nTriCount > 0 && !bMD3)
  {
      if(fabs(vMin[2]) < ((vMax[2]-vMin[2]) / 10.0))    // > 90% above 0 point.
        pModel->nModelPosition = 1;
//  sprintf (cPath, "%s/%sskin.pcx", ValueForKey(g_qeglobals.d_project_entity, "basepath"), pLocation);
    sprintf (cPath, "%s/%s", ValueForKey(g_qeglobals.d_project_entity, "basepath"), cSkin);
      pModel->nTextureBind = Texture_LoadSkin(cPath, &pModel->nSkinWidth, &pModel->nSkinHeight);
    if (pModel->nTextureBind == -1)
    {
//      sprintf (cPath, "%sskin.pcx", pLocation);
          strcpy (cPath, cSkin);
      pModel->nTextureBind = Texture_LoadSkin(cPath, &pModel->nSkinWidth, &pModel->nSkinHeight);
    }
  }
#endif

}

void setSpecialLoad(eclass_t *e, const char* pWhat, char*& p)
{
  CString str = e->comments;
  int n = str.Find(pWhat);
  if (n >= 0)
  {
    char* pText = e->comments + n + strlen(pWhat);
    if (*pText == '\"')
      pText++;

    str = "";
    while (*pText != '\"' && *pText != '\0')
    {
      str += *pText;
      pText++;
    }
    if (str.GetLength() > 0)
    {         
      p = strdup(str);
      //--LoadModel(str, e);
    }
  }
}

char    *debugname;

eclass_t *Eclass_InitFromText (char *text)
{
    char    *t;
    int     len;
    int     r, i;
    char    parms[256], *p;
    eclass_t    *e;
    char    color[128];

    e = (eclass_t*)qmalloc(sizeof(*e));
    memset (e, 0, sizeof(*e));
    
    text += strlen("/*QUAKED ");
    
// grab the name
    text = COM_Parse (text);
    e->name = (char*)qmalloc (strlen(com_token)+1);
    strcpy (e->name, com_token);
    debugname = e->name;
    
// grab the color, reformat as texture name
    r = sscanf (text," (%f %f %f)", &e->color[0], &e->color[1], &e->color[2]);
    if (r != 3)
        return e;
    sprintf (color, "(%f %f %f)", e->color[0], e->color[1], e->color[2]);
    //strcpy (e->texdef.name, color);
    e->texdef.SetName(color);

    while (*text != ')')
    {
        if (!*text)
            return e;
        text++;
    }
    text++;
    
// get the size 
    text = COM_Parse (text);
    if (com_token[0] == '(')
    {   // parse the size as two vectors
        e->fixedsize = true;
        r = sscanf (text,"%f %f %f) (%f %f %f)", &e->mins[0], &e->mins[1], &e->mins[2],
            &e->maxs[0], &e->maxs[1], &e->maxs[2]);
        if (r != 6)
            return e;

        for (i=0 ; i<2 ; i++)
        {
            while (*text != ')')
            {
                if (!*text)
                    return e;
                text++;
            }
            text++;
        }
    }
    else
    {   // use the brushes
    }
    
// get the flags
    

// copy to the first /n
    p = parms;
    while (*text && *text != '\n')
        *p++ = *text++;
    *p = 0;
    text++;
    
// any remaining words are parm flags
    p = parms;
    for (i=0 ; i<8 ; i++)
    {
        p = COM_Parse (p);
        if (!p)
            break;
        strcpy (e->flagnames[i], com_token);
    } 

// find the length until close comment
    for (t=text ; t[0] && !(t[0]=='*' && t[1]=='/') ; t++)
    ;
    
// copy the comment block out
    len = t-text;
    e->comments = (char*)qmalloc (len+1);
    memcpy (e->comments, text, len);
#if 0
    for (i=0 ; i<len ; i++)
        if (text[i] == '\n')
            e->comments[i] = '\r';
        else
            e->comments[i] = text[i];
#endif
    e->comments[len] = 0;
    
  setSpecialLoad(e, "model=", e->modelpath);
  setSpecialLoad(e, "skin=", e->skinpath);
  char *pFrame = NULL;
  setSpecialLoad(e, "frame=", pFrame);
  if (pFrame != NULL)
  {
    e->nFrame = atoi(pFrame);
  }

  if(!e->skinpath)
      setSpecialLoad(e, "texture=", e->skinpath);

  // setup show flags
  e->nShowFlags = 0;
  if (strcmpi(e->name, "light") == 0)
  {
    e->nShowFlags |= ECLASS_LIGHT;
  }

  if (  (strnicmp(e->name, "info_player", strlen("info_player")) == 0)
      ||(strnicmp(e->name, "path_corner", strlen("path_corner")) == 0) 
      ||(strnicmp(e->name, "team_ctf", strlen("team_ctf")) == 0) )
  {
    e->nShowFlags |= ECLASS_ANGLE;
  }
  if (strcmpi(e->name, "path") == 0)
  {
    e->nShowFlags |= ECLASS_PATH;
  }
  if (strcmpi(e->name, "misc_model") == 0)
  {
    e->nShowFlags |= ECLASS_MISCMODEL;
  }


  return e;
}

qboolean Eclass_hasModel(eclass_t *e, vec3_t &vMin, vec3_t &vMax)
{
  if (e->modelpath != NULL)
  {
    if (e->model == NULL)
    {
      e->model = reinterpret_cast<entitymodel_t*>(qmalloc(sizeof(entitymodel_t)));
    }
    char *pModelBuff = strdup(e->modelpath);
    char *pSkinBuff = NULL;
    if (e->skinpath)
    {
      pSkinBuff = strdup(e->skinpath);
    }

    CStringList Models;
    CStringList Skins;
    char* pToken = strtok(pModelBuff, ";\0");
    while (pToken != NULL)
    {
      Models.AddTail(pToken);
      pToken = strtok(NULL, ";\0");
    }

    if (pSkinBuff != NULL)
    {
      pToken = strtok(pSkinBuff, ";\0");
      while (pToken != NULL)
      {
        Skins.AddTail(pToken);
        pToken = strtok(NULL, ";\0");
      }
    }

    entitymodel *model = e->model;
    for (int i = 0; i < Models.GetCount(); i++)
    {
      char *pSkin = NULL;
      if (i < Skins.GetCount())
      {
        pSkin = Skins.GetAt(Skins.FindIndex(i)).GetBuffer(0);
      }
      LoadModel(Models.GetAt(Models.FindIndex(i)), e, vMin, vMax, model, pSkin);
      model->pNext = reinterpret_cast<entitymodel_t*>(qmalloc(sizeof(entitymodel_t)));
      model = model->pNext;
    }

    // at this poitn vMin and vMax contain the min max of the model
    // which needs to be centered at origin 0, 0, 0

    VectorSnap(vMin);
    VectorSnap(vMax);

    if (vMax[0] - vMin[0] < 2)
    {
      vMin[0] -= 1;
      vMax[0] += 1;
    }

    if (vMin[1] - vMax[1] < 2)
    {
      vMin[1] -= 1;
      vMax[1] += 1;
    }

    if (vMax[2] - vMin[2] < 2)
    {
      vMax[2] -= 1;
      vMax[2] += 1;
    }

    vec3_t vTemp;
    VectorAdd(vMin, vMax, vTemp);
    VectorScale(vTemp, 0.5, vTemp);
    model = e->model;
    while (model != NULL)
    {
      for (i = 0; i < model->nTriCount; i++)
      {
        for (int j = 0; j < 3; j++)
        {
          ;//VectorSubtract(model->pTriList[i].v[j], vTemp, model->pTriList[i].v[j]);
        }
      }
      model = model->pNext;
    }

    free(pModelBuff);
    free(e->modelpath);
    e->modelpath = NULL;
      
    if(e->skinpath)
      {
          free(e->skinpath);
          e->skinpath = NULL;
      free(pSkinBuff);
      }

  }
  return (e->model != NULL && e->model->nTriCount > 0);
}


void EClass_InsertSortedList(eclass_t *&pList, eclass_t *e)
{
    eclass_t    *s;
    
    if (!pList)
    {
        pList = e;
        return;
    }


    s = pList;
    if (stricmp (e->name, s->name) < 0)
    {
        e->next = s;
        pList = e;
        return;
    }

    do
    {
        if (!s->next || stricmp (e->name, s->next->name) < 0)
        {
            e->next = s->next;
            s->next = e;
            return;
        }
        s=s->next;
    } while (1);
}

/*
=================
Eclass_InsertAlphabetized
=================
*/
void Eclass_InsertAlphabetized (eclass_t *e)
{
#if 1
  EClass_InsertSortedList(eclass, e);
#else
    eclass_t    *s;
    
    if (!eclass)
    {
        eclass = e;
        return;
    }


    s = eclass;
    if (stricmp (e->name, s->name) < 0)
    {
        e->next = s;
        eclass = e;
        return;
    }

    do
    {
        if (!s->next || stricmp (e->name, s->next->name) < 0)
        {
            e->next = s->next;
            s->next = e;
            return;
        }
        s=s->next;
    } while (1);
#endif
}


/*
=================
Eclass_ScanFile
=================
*/

qboolean parsing_single = false;
qboolean eclass_found;
eclass_t *eclass_e;
//#ifdef BUILD_LIST
extern bool g_bBuildList;
CString strDefFile;
//#endif
void Eclass_ScanFile (char *filename)
{
    int     size;
    char    *data;
    eclass_t    *e;
    int     i;
    char    temp[1024];
    
    QE_ConvertDOSToUnixName( temp, filename );
    
    Sys_Printf ("ScanFile: %s\n", temp);
    
    // BUG
    size = LoadFile (filename, (void**)&data);
    eclass_found = false;
    for (i=0 ; i<size ; i++)
        if (!strncmp(data+i, "/*QUAKED",8))
        {
            
            //#ifdef BUILD_LIST
            if (g_bBuildList)
            {
                CString strDef = "";
                int j = i;
                while (1)
                {
                    strDef += *(data+j);
                    if (*(data+j) == '/' && *(data+j-1) == '*')
                        break;
                    j++;
                }
                strDef += "\r\n\r\n\r\n";
                strDefFile += strDef;
            }
            //#endif
            e = Eclass_InitFromText (data+i);
            if (e)
                Eclass_InsertAlphabetized (e);
            else
                printf ("Error parsing: %s in %s\n",debugname, filename);

            // single ?
            eclass_e = e;
            eclass_found = true;
            if ( parsing_single )
                break;
        }
        
        free (data);        
}



void Eclass_InitForSourceDirectory (char *path)
{
    struct _finddata_t fileinfo;
    int     handle;
    char    filename[1024];
    char    filebase[1024];
    char    temp[1024];
    char    *s;

    QE_ConvertDOSToUnixName( temp, path );

    Sys_Printf ("Eclass_InitForSourceDirectory: %s\n", temp );

    strcpy (filebase, path);
    s = filebase + strlen(filebase)-1;
    while (*s != '\\' && *s != '/' && s!=filebase)
        s--;
    *s = 0;

  CleanUpEntities();
    eclass = NULL;
//#ifdef BUILD_LIST
  if (g_bBuildList)
    strDefFile = "";
//#endif
    handle = _findfirst (path, &fileinfo);
    if (handle != -1)
    {
        do
        {
            sprintf (filename, "%s\\%s", filebase, fileinfo.name);
            Eclass_ScanFile (filename);
        } while (_findnext( handle, &fileinfo ) != -1);

        _findclose (handle);
    }

//#ifdef BUILD_LIST
  if (g_bBuildList)
  {
    CFile file;
    if (file.Open("c:\\entities.def", CFile::modeCreate | CFile::modeWrite)) 
    {
      file.Write(strDefFile.GetBuffer(0), strDefFile.GetLength());
      file.Close();
    }
  }
//#endif

    eclass_bad = Eclass_InitFromText ("/*QUAKED UNKNOWN_CLASS (0 0.5 0) ?");
}

eclass_t *Eclass_ForName (char *name, qboolean has_brushes)
{
    eclass_t    *e;
    char        init[1024];

#ifdef _DEBUG
  // grouping stuff, not an eclass
  if (strcmp(name, "group_info")==0)
    Sys_Printf("WARNING: unexpected group_info entity in Eclass_ForName\n");
#endif

    if (!name)
        return eclass_bad;

    for (e=eclass ; e ; e=e->next)
        if (!strcmp (name, e->name))
            return e;

    // create a new class for it
    if (has_brushes)
    {
        sprintf (init, "/*QUAKED %s (0 0.5 0) ?\nNot found in source.\n", name);
        e = Eclass_InitFromText (init);
    }
    else
    {
        sprintf (init, "/*QUAKED %s (0 0.5 0) (-8 -8 -8) (8 8 8)\nNot found in source.\n", name);
        e = Eclass_InitFromText (init);
    }

    Eclass_InsertAlphabetized (e);

    return e;
}


eclass_t* GetCachedModel(entity_t *pEntity, const char *pName, vec3_t &vMin, vec3_t &vMax)
{

    eclass_t *e = NULL;
  if (pName == NULL || strlen(pName) == 0)
  {
    return NULL;
  }

    for (e = g_md3Cache; e ; e = e->next)
  {
        if (!strcmp (pName, e->name))
    {
      pEntity->md3Class = e;
      VectorCopy(e->mins, vMin);
      VectorCopy(e->maxs, vMax);
            return e;
    }
  }

    e = (eclass_t*)qmalloc(sizeof(*e));
    memset (e, 0, sizeof(*e));
  e->name = strdup(pName);
  e->modelpath = strdup(pName);
  e->skinpath = strdup(pName);
  char *p = strstr(e->skinpath, ".md3");
  if (p != NULL)
  {
    p++;
    strncpy(p, "tga", 3);
  }
  else
  {
    free(e->skinpath);
    e->skinpath = NULL;
  }

  e->color[0] = e->color[2] = 0.85;

  if (Eclass_hasModel(e, vMin, vMax))
  {
    EClass_InsertSortedList(g_md3Cache, e);
    VectorCopy(vMin, e->mins);
    VectorCopy(vMax, e->maxs);
    pEntity->md3Class = e;
    return e;
  }

  return NULL;
}

---