glfile.cpp

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/*
===========================================================================

Doom 3 GPL Source Code
Copyright (C) 1999-2011 id Software LLC, a ZeniMax Media company. 

This file is part of the Doom 3 GPL Source Code (?Doom 3 Source Code?).  

Doom 3 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 3 of the License, or
(at your option) any later version.

Doom 3 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 Doom 3 Source Code.  If not, see <http://www.gnu.org/licenses/>.

In addition, the Doom 3 Source Code is also subject to certain additional terms. You should have received a copy of these additional terms immediately following the terms and conditions of the GNU General Public License which accompanied the Doom 3 Source Code.  If not, please request a copy in writing from id Software at the address below.

If you have questions concerning this license or the applicable additional terms, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.

===========================================================================
*/

#include "../../../idlib/precompiled.h"
#pragma hdrstop

#include "dmap.h"

int             c_glfaces;

int PortalVisibleSides( uPortal_t *p )
{
        int             fcon, bcon;

        if (!p->onnode)
                return 0;               // outside

        fcon = p->nodes[0]->opaque;
        bcon = p->nodes[1]->opaque;

        // same contents never create a face
        if (fcon == bcon)
                return 0;

        if (!fcon)
                return 1;
        if (!bcon)
                return 2;
        return 0;
}

void OutputWinding( idWinding *w, idFile *glview )
{
        static  int     level = 128;
        float           light;
        int                     i;

        glview->WriteFloatString( "%i\n", w->GetNumPoints() );
        level += 28;
        light = (level&255)/255.0;
        for ( i = 0; i < w->GetNumPoints(); i++ ) {
                glview->WriteFloatString( "%6.3f %6.3f %6.3f %6.3f %6.3f %6.3f\n",
                        (*w)[i][0],
                        (*w)[i][1],
                        (*w)[i][2],
                        light,
                        light,
                        light );
        }
        glview->WriteFloatString( "\n" );
}

/*
=============
OutputPortal
=============
*/
void OutputPortal( uPortal_t *p, idFile *glview ) {
        idWinding       *w;
        int             sides;

        sides = PortalVisibleSides( p );
        if ( !sides ) {
                return;
        }

        c_glfaces++;

        w = p->winding;

        if ( sides == 2 ) {             // back side
                w = w->Reverse();
        }

        OutputWinding( w, glview );

        if ( sides == 2 ) {
                delete w;
        }
}

/*
=============
WriteGLView_r
=============
*/
void WriteGLView_r( node_t *node, idFile *glview )
{
        uPortal_t       *p, *nextp;

        if ( node->planenum != PLANENUM_LEAF )
        {
                WriteGLView_r( node->children[0], glview );
                WriteGLView_r( node->children[1], glview );
                return;
        }

        // write all the portals
        for ( p = node->portals; p; p = nextp )
        {
                if ( p->nodes[0] == node )
                {
                        OutputPortal( p, glview );
                        nextp = p->next[0];
                }
                else {
                        nextp = p->next[1];
                }
        }
}

/*
=============
WriteGLView
=============
*/
void WriteGLView( tree_t *tree, char *source )
{
        idFile *glview;

        c_glfaces = 0;
        common->Printf( "Writing %s\n", source );

        glview = fileSystem->OpenExplicitFileWrite( source );
        if ( !glview ) {
                common->Error( "Couldn't open %s", source );
        }
        WriteGLView_r( tree->headnode, glview );
        fileSystem->CloseFile( glview );

        common->Printf( "%5i c_glfaces\n", c_glfaces );
}