lighting.cpp

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/*
Copyright (C) 1997-2001 Id Software, Inc.

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 "lighting.h"
#include "map.h"
#include "bsp.h"

void LightWorld (void)
{
    if (curTile->numnodes == 0 || curTile->numfaces == 0)
        Sys_Error("Empty map");

    /* initialize light data */
    curTile->lightdata[config.compile_for_day][0] = config.lightquant;
    curTile->lightdatasize[config.compile_for_day] = 1;

    MakeTracingNodes(LEVEL_LASTLIGHTBLOCKING + 1);

    /* turn each face into a single patch */
    BuildPatches();

    /* subdivide patches to a maximum dimension */
    SubdividePatches();

    /* create lights out of patches and lights */
    BuildLights();

    /* patches are no longer needed */
    FreePatches();

    /* build per-vertex normals for phong shading */
    BuildVertexNormals();

    /* build initial facelights */
    RunThreadsOn(BuildFacelights, curTile->numfaces, config.verbosity >= VERB_NORMAL, "FACELIGHTS");

    /* finalize it and write it out */
    RunThreadsOn(FinalLightFace, curTile->numfaces, config.verbosity >= VERB_NORMAL, "FINALLIGHT");
    CloseTracingNodes();
}