The Quake 2 tools as originally released under the GPL license.

2026-03-20 09:00:02 +01:00 · 2012-01-31 15:22:13 -06:00
commit 707e849167
132 changed files with 52073 additions and 0 deletions
--- a/qe4/csg.c
+++ b/qe4/csg.c
@@ -0,0 +1,168 @@
+/*
+===========================================================================
+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 "qe3.h"
+
+/*
+==============
+CSG_SplitBrushByFace
+
+The incoming brush is NOT freed.
+The incoming face is NOT left referenced.
+==============
+*/
+void CSG_SplitBrushByFace (brush_t *in, face_t *f, brush_t **front, brush_t **back)
+{
+	brush_t	*b;
+	face_t	*nf;
+	vec3_t	temp;
+
+	b = Brush_Clone (in);
+	nf = Face_Clone (f);
+
+	nf->texdef = b->brush_faces->texdef;
+	nf->next = b->brush_faces;
+	b->brush_faces = nf;
+
+	Brush_Build( b );
+	Brush_RemoveEmptyFaces ( b );
+	if ( !b->brush_faces )
+	{	// completely clipped away
+		Brush_Free (b);
+		*back = NULL;
+	}
+	else
+	{
+		Entity_LinkBrush (in->owner, b);
+		*back = b;
+	}
+
+	b = Brush_Clone (in);
+	nf = Face_Clone (f);
+	// swap the plane winding
+	VectorCopy (nf->planepts[0], temp);
+	VectorCopy (nf->planepts[1], nf->planepts[0]);
+	VectorCopy (temp, nf->planepts[1]);
+
+	nf->texdef = b->brush_faces->texdef;
+	nf->next = b->brush_faces;
+	b->brush_faces = nf;
+
+	Brush_Build( b );
+	Brush_RemoveEmptyFaces ( b );
+	if ( !b->brush_faces )
+	{	// completely clipped away
+		Brush_Free (b);
+		*front = NULL;
+	}
+	else
+	{
+		Entity_LinkBrush (in->owner, b);
+		*front = b;
+	}
+}
+
+/*
+=============
+CSG_MakeHollow
+=============
+*/
+void CSG_MakeHollow (void)
+{
+	brush_t		*b, *front, *back, *next;
+	face_t		*f;
+	face_t		split;
+	vec3_t		move;
+	int			i;
+
+	for (b = selected_brushes.next ; b != &selected_brushes ; b=next)
+	{
+		next = b->next;
+		for (f = b->brush_faces ; f ; f=f->next)
+		{
+			split = *f;
+			VectorScale (f->plane.normal, g_qeglobals.d_gridsize, move);
+			for (i=0 ; i<3 ; i++)
+				VectorSubtract (split.planepts[i], move, split.planepts[i]);
+
+			CSG_SplitBrushByFace (b, &split, &front, &back);
+			if (back)
+				Brush_Free (back);
+			if (front)
+				Brush_AddToList (front, &selected_brushes);
+		}
+		Brush_Free (b);
+	}
+	Sys_UpdateWindows (W_ALL);
+}
+
+
+/*
+=============
+CSG_Subtract
+=============
+*/
+void CSG_Subtract (void)
+{
+	brush_t		*b, *s, *frag, *front, *back, *next, *snext;
+	face_t		*f;
+	int			i;
+
+	Sys_Printf ("Subtracting...\n");
+
+	for (b = selected_brushes.next ; b != &selected_brushes ; b=next)
+	{
+		next = b->next;
+
+		if (b->owner->eclass->fixedsize)
+			continue;	// can't use texture from a fixed entity, so don't subtract
+
+		for (s=active_brushes.next ; s != &active_brushes ; s=snext)
+		{
+			snext = s->next;
+			if (s->owner->eclass->fixedsize)
+				continue;
+
+			for (i=0 ; i<3 ; i++)
+				if (b->mins[i] >= s->maxs[i] - ON_EPSILON
+				|| b->maxs[i] <= s->mins[i] + ON_EPSILON)
+					break;
+			if (i != 3)
+				continue;	// definately don't touch
+
+			frag = s;
+			for (f = b->brush_faces ; f && frag ; f=f->next)
+			{
+				CSG_SplitBrushByFace (frag, f, &front, &back);
+				Brush_Free (frag);
+				frag = back;
+				if (front)
+					Brush_AddToList (front, &active_brushes);
+			}
+			if (frag)
+				Brush_Free (frag);
+		}
+	}
+
+	Sys_Printf ("done.\n");
+	Sys_UpdateWindows (W_ALL);
+}