Source to src/m_bbox.c


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// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
//	Main loop menu stuff.
//	Random number LUT.
//	Default Config File.
//	PCX Screenshots.
//
//-----------------------------------------------------------------------------

static const char
rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $";


#ifdef __GNUG__
#pragma implementation "m_bbox.h"
#endif
#include "m_bbox.h"


#define MAXINT 0x7FFFFFFF;
#define MININT 0x80000000;

void M_ClearBox (fixed_t *box)
{
    box[BOXTOP] = box[BOXRIGHT] = MININT;
    box[BOXBOTTOM] = box[BOXLEFT] = MAXINT;
}

void M_AddToBox(fixed_t* box, fixed_t x, fixed_t y)
{
    if (x<box[BOXLEFT])
		box[BOXLEFT] = x;
    else if (x>box[BOXRIGHT])
		box[BOXRIGHT] = x;
    if (y<box[BOXBOTTOM])
		box[BOXBOTTOM] = y;
    else if (y>box[BOXTOP])
		box[BOXTOP] = y;
}