Q2Tools source - didn't import this in initially

[xonotic/netradiant.git] / tools / quake2 / extra / bsp / qbsp3 / glfile.c

diff --git a/tools/quake2/extra/bsp/qbsp3/glfile.c b/tools/quake2/extra/bsp/qbsp3/glfile.c
new file mode 100644 (file)
index 0000000..6d76777
--- /dev/null
+++ b/tools/quake2/extra/bsp/qbsp3/glfile.c
@@ -0,0 +1,149 @@
+/*
+===========================================================================
+Copyright (C) 1997-2006 Id Software, Inc.
+
+This file is part of Quake 2 Tools source code.
+
+Quake 2 Tools 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 2 Tools 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 Quake 2 Tools source code; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+#include "qbsp.h"
+
+int            c_glfaces;
+
+int PortalVisibleSides (portal_t *p)
+{
+       int             fcon, bcon;
+
+       if (!p->onnode)
+               return 0;               // outside
+
+       fcon = p->nodes[0]->contents;
+       bcon = p->nodes[1]->contents;
+
+       // same contents never create a face
+       if (fcon == bcon)
+               return 0;
+
+       // FIXME: is this correct now?
+       if (!fcon)
+               return 1;
+       if (!bcon)
+               return 2;
+       return 0;
+}
+
+void OutputWinding (winding_t *w, FILE *glview)
+{
+       static  int     level = 128;
+       vec_t           light;
+       int                     i;
+
+       fprintf (glview, "%i\n", w->numpoints);
+       level+=28;
+       light = (level&255)/255.0;
+       for (i=0 ; i<w->numpoints ; i++)
+       {
+               fprintf (glview, "%6.3f %6.3f %6.3f %6.3f %6.3f %6.3f\n",
+                       w->p[i][0],
+                       w->p[i][1],
+                       w->p[i][2],
+                       light,
+                       light,
+                       light);
+       }
+       fprintf (glview, "\n");
+}
+
+/*
+=============
+OutputPortal
+=============
+*/
+void OutputPortal (portal_t *p, FILE *glview)
+{
+       winding_t       *w;
+       int             sides;
+
+       sides = PortalVisibleSides (p);
+       if (!sides)
+               return;
+
+       c_glfaces++;
+
+       w = p->winding;
+
+       if (sides == 2)         // back side
+               w = ReverseWinding (w);
+
+       OutputWinding (w, glview);
+
+       if (sides == 2)
+               FreeWinding(w);
+}
+
+/*
+=============
+WriteGLView_r
+=============
+*/
+void WriteGLView_r (node_t *node, FILE *glview)
+{
+       portal_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)
+{
+       char    name[1024];
+       FILE    *glview;
+
+       c_glfaces = 0;
+       sprintf (name, "%s%s.gl",outbase, source);
+       printf ("Writing %s\n", name);
+
+       glview = fopen (name, "w");
+       if (!glview)
+               Error ("Couldn't open %s", name);
+       WriteGLView_r (tree->headnode, glview);
+       fclose (glview);
+
+       printf ("%5i c_glfaces\n", c_glfaces);
+}
+