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100 lines
2.1 KiB
C
100 lines
2.1 KiB
C
// SONIC ROBO BLAST 2
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//-----------------------------------------------------------------------------
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// Copyright (C) 1993-1996 by id Software, Inc.
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// Copyright (C) 1998-2000 by DooM Legacy Team.
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// Copyright (C) 1999-2016 by Sonic Team Junior.
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//
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// This program is free software distributed under the
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// terms of the GNU General Public License, version 2.
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// See the 'LICENSE' file for more details.
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//-----------------------------------------------------------------------------
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/// \file m_bbox.c
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/// \brief bounding boxes
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#include "doomtype.h"
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#include "m_bbox.h"
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/** \brief The M_ClearBox function
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\param box a fixed_t array of 4 to be cleaned
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\return void
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*/
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void M_ClearBox(fixed_t *box)
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{
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box[BOXTOP] = box[BOXRIGHT] = INT32_MIN;
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box[BOXBOTTOM] = box[BOXLEFT] = INT32_MAX;
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}
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/** \brief The M_AddToBox function
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\param box a fixed_t array of 4 to be added with
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\param x x of box
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\param y y of box
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\return void
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*/
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void M_AddToBox(fixed_t *box, fixed_t x, fixed_t y)
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{
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if (x < box[BOXLEFT])
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box[BOXLEFT] = x;
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if (x > box[BOXRIGHT])
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box[BOXRIGHT] = x;
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if (y < box[BOXBOTTOM])
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box[BOXBOTTOM] = y;
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if (y > box[BOXTOP])
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box[BOXTOP] = y;
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}
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/** \brief The M_PointInBox function
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\param box a fixed_t array of 4 to be checked with
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\param x x of box
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\param y y of box
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\return if it's in the box
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*/
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boolean M_PointInBox(fixed_t *box, fixed_t x, fixed_t y)
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{
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if (x < box[BOXLEFT])
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return false;
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if (x > box[BOXRIGHT])
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return false;
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if (y < box[BOXBOTTOM])
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return false;
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if (y > box[BOXTOP])
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return false;
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return true;
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}
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/** \brief The M_CircleTouchBox function
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\param box a parameter of type fixed_t *
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\param circlex a parameter of type fixed_t
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\param circley a parameter of type fixed_t
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\param circleradius a parameter of type fixed_t
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\return boolean
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*/
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boolean M_CircleTouchBox(fixed_t *box, fixed_t circlex, fixed_t circley, fixed_t circleradius)
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{
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if (box[BOXLEFT] - circleradius > circlex)
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return false;
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if (box[BOXRIGHT] + circleradius < circlex)
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return false;
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if (box[BOXBOTTOM] - circleradius > circley)
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return false;
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if (box[BOXTOP] + circleradius < circley)
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return false;
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return true;
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}
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