am_map.c

使用Doom引擎开发的著名游戏《毁灭巫师》的源代码。

//**************************************************************************
//**
//** am_map.c : Heretic 2 : Raven Software, Corp.
//**
//** $RCSfile: am_map.c,v $
//** $Revision: 1.22 $
//** $Date: 96/01/06 18:37:23 $
//** $Author: bgokey $
//**
//**************************************************************************

#include "h2def.h"
#include "p_local.h"
#include "am_map.h"
#include "am_data.h"
#include <stdio.h>

#define NUMALIAS 3 // Number of antialiased lines.

int cheating = 0;
static int grid = 0;

static int leveljuststarted = 1; // kluge until AM_LevelInit() is called

boolean    automapactive = false;
static int finit_width = SCREENWIDTH;
static int finit_height = SCREENHEIGHT-SBARHEIGHT-3;
static int f_x, f_y; // location of window on screen
static int f_w, f_h; // size of window on screen
static int lightlev; // used for funky strobing effect
static byte *fb; // pseudo-frame buffer
static int amclock;

static mpoint_t m_paninc; // how far the window pans each tic (map coords)
static fixed_t mtof_zoommul; // how far the window zooms in each tic (map coords)
static fixed_t ftom_zoommul; // how far the window zooms in each tic (fb coords)

static fixed_t m_x, m_y;   // LL x,y where the window is on the map (map coords)
static fixed_t m_x2, m_y2; // UR x,y where the window is on the map (map coords)

// width/height of window on map (map coords)
static fixed_t m_w, m_h;
static fixed_t min_x, min_y; // based on level size
static fixed_t max_x, max_y; // based on level size
static fixed_t max_w, max_h; // max_x-min_x, max_y-min_y
static fixed_t min_w, min_h; // based on player size
static fixed_t min_scale_mtof; // used to tell when to stop zooming out
static fixed_t max_scale_mtof; // used to tell when to stop zooming in

// old stuff for recovery later
static fixed_t old_m_w, old_m_h;
static fixed_t old_m_x, old_m_y;

// old location used by the Follower routine
static mpoint_t f_oldloc;

// used by MTOF to scale from map-to-frame-buffer coords
static fixed_t scale_mtof = INITSCALEMTOF;
// used by FTOM to scale from frame-buffer-to-map coords (=1/scale_mtof)
static fixed_t scale_ftom;

static player_t *plr; // the player represented by an arrow
static vertex_t oldplr;

//static patch_t *marknums[10]; // numbers used for marking by the automap
//static mpoint_t markpoints[AM_NUMMARKPOINTS]; // where the points are
//static int markpointnum = 0; // next point to be assigned

static int followplayer = 1; // specifies whether to follow the player around

static char cheat_kills[] = { 'k', 'i', 'l', 'l', 's' };
static boolean ShowKills = 0;
static unsigned ShowKillsCount = 0;

extern boolean viewactive;

static byte antialias[NUMALIAS][8]=
{
	{ 83, 84, 85, 86, 87, 88, 89, 90 },
	{ 96, 96, 95, 94, 93, 92, 91, 90 },
	{ 107, 108, 109, 110, 111, 112, 89, 90 }
};

/*
static byte *aliasmax[NUMALIAS] = {
	&antialias[0][7], &antialias[1][7], &antialias[2][7]
};*/

static byte *maplump; // pointer to the raw data for the automap background.
static short mapystart=0; // y-value for the start of the map bitmap...used in
										//the parallax stuff.
static short mapxstart=0; //x-value for the bitmap.

//byte screens[][SCREENWIDTH*SCREENHEIGHT];
//void V_MarkRect (int x, int y, int width, int height);

// Functions

void DrawWuLine(int X0, int Y0, int X1, int Y1, byte *BaseColor,
	int NumLevels, unsigned short IntensityBits);

void AM_DrawDeathmatchStats(void);
static void DrawWorldTimer(void);

// Calculates the slope and slope according to the x-axis of a line
// segment in map coordinates (with the upright y-axis n' all) so
// that it can be used with the brain-dead drawing stuff.

// Ripped out for Heretic
/*
void AM_getIslope(mline_t *ml, islope_t *is)
{
  int dx, dy;

  dy = ml->a.y - ml->b.y;
  dx = ml->b.x - ml->a.x;
  if (!dy) is->islp = (dx<0?-MAXINT:MAXINT);
  else is->islp = FixedDiv(dx, dy);
  if (!dx) is->slp = (dy<0?-MAXINT:MAXINT);
  else is->slp = FixedDiv(dy, dx);
}
*/

void AM_activateNewScale(void)
{
  m_x += m_w/2;
  m_y += m_h/2;
  m_w = FTOM(f_w);
  m_h = FTOM(f_h);
  m_x -= m_w/2;
  m_y -= m_h/2;
  m_x2 = m_x + m_w;
  m_y2 = m_y + m_h;
}

void AM_saveScaleAndLoc(void)
{
  old_m_x = m_x;
  old_m_y = m_y;
  old_m_w = m_w;
  old_m_h = m_h;
}

void AM_restoreScaleAndLoc(void)
{

  m_w = old_m_w;
  m_h = old_m_h;
  if (!followplayer)
  {
    m_x = old_m_x;
    m_y = old_m_y;
  } else {
    m_x = plr->mo->x - m_w/2;
    m_y = plr->mo->y - m_h/2;
  }
  m_x2 = m_x + m_w;
  m_y2 = m_y + m_h;

  // Change the scaling multipliers
  scale_mtof = FixedDiv(f_w<<FRACBITS, m_w);
  scale_ftom = FixedDiv(FRACUNIT, scale_mtof);
}

// adds a marker at the current location

/*
void AM_addMark(void)
{
  markpoints[markpointnum].x = m_x + m_w/2;
  markpoints[markpointnum].y = m_y + m_h/2;
  markpointnum = (markpointnum + 1) % AM_NUMMARKPOINTS;

}
*/
void AM_findMinMaxBoundaries(void)
{
  int i;
  fixed_t a, b;

  min_x = min_y = MAXINT;
  max_x = max_y = -MAXINT;
  for (i=0;i<numvertexes;i++)
  {
    if (vertexes[i].x < min_x) min_x = vertexes[i].x;
    else if (vertexes[i].x > max_x) max_x = vertexes[i].x;
    if (vertexes[i].y < min_y) min_y = vertexes[i].y;
    else if (vertexes[i].y > max_y) max_y = vertexes[i].y;
  }
  max_w = max_x - min_x;
  max_h = max_y - min_y;
  min_w = 2*PLAYERRADIUS;
  min_h = 2*PLAYERRADIUS;

  a = FixedDiv(f_w<<FRACBITS, max_w);
  b = FixedDiv(f_h<<FRACBITS, max_h);
  min_scale_mtof = a < b ? a : b;

  max_scale_mtof = FixedDiv(f_h<<FRACBITS, 2*PLAYERRADIUS);

}

void AM_changeWindowLoc(void)
{
  if (m_paninc.x || m_paninc.y)
  {
    followplayer = 0;
    f_oldloc.x = MAXINT;
  }

  m_x += m_paninc.x;
  m_y += m_paninc.y;

  if (m_x + m_w/2 > max_x)
  {
  		m_x = max_x - m_w/2;
		m_paninc.x=0;
  }
  else if (m_x + m_w/2 < min_x)
  {
  		m_x = min_x - m_w/2;
		m_paninc.x=0;
  }
  if (m_y + m_h/2 > max_y)
  {
  		m_y = max_y - m_h/2;
		m_paninc.y=0;
  }
  else if (m_y + m_h/2 < min_y)
  {
  		m_y = min_y - m_h/2;
		m_paninc.y=0;
  }
/*
  mapxstart += MTOF(m_paninc.x+FRACUNIT/2);
  mapystart -= MTOF(m_paninc.y+FRACUNIT/2);
  if(mapxstart >= finit_width)
		mapxstart -= finit_width;
  if(mapxstart < 0)
		mapxstart += finit_width;
  if(mapystart >= finit_height)
		mapystart -= finit_height;
  if(mapystart < 0)
		mapystart += finit_height;
*/
  m_x2 = m_x + m_w;
  m_y2 = m_y + m_h;
}

void AM_initVariables(void)
{
  int pnum;
	thinker_t *think;
	mobj_t *mo;

  //static event_t st_notify = { ev_keyup, AM_MSGENTERED };

  automapactive = true;
  fb = screen;

  f_oldloc.x = MAXINT;
  amclock = 0;
  lightlev = 0;

  m_paninc.x = m_paninc.y = 0;
  ftom_zoommul = FRACUNIT;
  mtof_zoommul = FRACUNIT;

  m_w = FTOM(f_w);
  m_h = FTOM(f_h);

  // find player to center on initially
  if (!playeringame[pnum = consoleplayer])
    for (pnum=0;pnum<MAXPLAYERS;pnum++) if (playeringame[pnum]) break;
  plr = &players[pnum];
  oldplr.x = plr->mo->x;
  oldplr.y = plr->mo->y;
  m_x = plr->mo->x - m_w/2;
  m_y = plr->mo->y - m_h/2;
  AM_changeWindowLoc();

  // for saving & restoring
  old_m_x = m_x;
  old_m_y = m_y;
  old_m_w = m_w;
  old_m_h = m_h;

	// load in the location of keys, if in baby mode

//	memset(KeyPoints, 0, sizeof(vertex_t)*3);
	if(gameskill == sk_baby)
	{
		for(think = thinkercap.next; think != &thinkercap; think = think->next)
		{
			if(think->function != P_MobjThinker)
			{ //not a mobj
				continue;
			}
			mo = (mobj_t *)think;
		}
	}

  // inform the status bar of the change
//c  ST_Responder(&st_notify);
}

void AM_loadPics(void)
{
  maplump = W_CacheLumpName("AUTOPAGE", PU_STATIC);
}


/*
void AM_clearMarks(void)
{
  int i;
  for (i=0;i<AM_NUMMARKPOINTS;i++) markpoints[i].x = -1; // means empty
  markpointnum = 0;
}
*/

// should be called at the start of every level
// right now, i figure it out myself

void AM_LevelInit(void)
{
  leveljuststarted = 0;

  f_x = f_y = 0;
  f_w = finit_width;
  f_h = finit_height;
	mapxstart = mapystart = 0;


//  AM_clearMarks();

  AM_findMinMaxBoundaries();
  scale_mtof = FixedDiv(min_scale_mtof, (int) (0.7*FRACUNIT));
  if (scale_mtof > max_scale_mtof) scale_mtof = min_scale_mtof;
  scale_ftom = FixedDiv(FRACUNIT, scale_mtof);
}

static boolean stopped = true;

void AM_Stop (void)
{
  //static event_t st_notify = { 0, ev_keyup, AM_MSGEXITED };

//  AM_unloadPics();
  automapactive = false;
//  ST_Responder(&st_notify);
  stopped = true;
	BorderNeedRefresh = true;
}

void AM_Start (void)
{
  static int lastlevel = -1, lastepisode = -1;

  if (!stopped) AM_Stop();
  stopped = false;
  if(gamestate != GS_LEVEL)
  {
		return; // don't show automap if we aren't in a game!
  }
  if (lastlevel != gamemap || lastepisode != gameepisode)
  {
    AM_LevelInit();
    lastlevel = gamemap;
    lastepisode = gameepisode;
  }
  AM_initVariables();
  AM_loadPics();
}

// set the window scale to the maximum size

void AM_minOutWindowScale(void)
{
  scale_mtof = min_scale_mtof;
  scale_ftom = FixedDiv(FRACUNIT, scale_mtof);
  AM_activateNewScale();
}

// set the window scale to the minimum size

void AM_maxOutWindowScale(void)
{
  scale_mtof = max_scale_mtof;
  scale_ftom = FixedDiv(FRACUNIT, scale_mtof);
  AM_activateNewScale();
}

boolean AM_Responder (event_t *ev)
{
	int rc;
	static int cheatstate=0;
	static int bigstate=0;
	
	rc = false;
	if (!automapactive)
	{
		if (ev->type == ev_keydown && ev->data1 == AM_STARTKEY
			&& gamestate == GS_LEVEL)
		{
			AM_Start ();
			SB_state = -1;
			viewactive = false;
			rc = true;
		}
	}
	else if (ev->type == ev_keydown)
	{
		rc = true;
		switch(ev->data1)
		{
			case AM_PANRIGHTKEY: // pan right
				if (!followplayer) m_paninc.x = FTOM(F_PANINC);
				else rc = false;
				break;
			case AM_PANLEFTKEY: // pan left
				if (!followplayer) m_paninc.x = -FTOM(F_PANINC);
				else rc = false;
				break;
			case AM_PANUPKEY: // pan up
				if (!followplayer) m_paninc.y = FTOM(F_PANINC);
				else rc = false;
				break;
			case AM_PANDOWNKEY: // pan down
				if (!followplayer) m_paninc.y = -FTOM(F_PANINC);
				else rc = false;
				break;
			case AM_ZOOMOUTKEY: // zoom out
				mtof_zoommul = M_ZOOMOUT;
				ftom_zoommul = M_ZOOMIN;
				break;
			case AM_ZOOMINKEY: // zoom in
				mtof_zoommul = M_ZOOMIN;
				ftom_zoommul = M_ZOOMOUT;
				break;
			case AM_ENDKEY:
				bigstate = 0;
				viewactive = true;
				AM_Stop ();
				SB_state = -1;
				break;
			case AM_GOBIGKEY:
				bigstate = !bigstate;
				if (bigstate)
				{
					AM_saveScaleAndLoc();
					AM_minOutWindowScale();
				}
				else AM_restoreScaleAndLoc();
				break;
			case AM_FOLLOWKEY:
				followplayer = !followplayer;
				f_oldloc.x = MAXINT;
				P_SetMessage(plr, 
					followplayer ? AMSTR_FOLLOWON : AMSTR_FOLLOWOFF, true);
				break;
			default:
				cheatstate=0;
				rc = false;
		}