ref: 3e27f1b2d0d8f020e9d3509934736ee9055b8c31
dir: /src/rt_view.c/
/*
Copyright (C) 1994-1995 Apogee Software, Ltd.
Copyright (C) 2002-2015 icculus.org, GNU/Linux port
Copyright (C) 2017-2018 Steven LeVesque
This program 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.
This program 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "rt_def.h"
#include "rt_view.h"
#include "z_zone.h"
#include "w_wad.h"
#include "lumpy.h"
#include "rt_util.h"
#include "rt_vid.h"
#include "rt_game.h"
#include "rt_draw.h"
#include "rt_ted.h"
#include "isr.h"
#include "rt_rand.h"
#include "rt_sound.h"
#include "modexlib.h"
#include "rt_menu.h"
#include <stdlib.h>
#include "rt_main.h"
#include "rt_battl.h"
#include "rt_floor.h"
#include "rt_str.h"
#include "watcom.h"
#include "develop.h"
#define LIGHTNINGLEVEL 4
#define MINLIGHTNINGLEVEL 2
#define MAXLIGHTNINGLEVEL 10
/*
=============================================================================
GLOBALS
=============================================================================
*/
extern int G_weaponscale;
int StatusBar = 0;
int lightninglevel=0;
boolean lightning=false;
int normalshade;
int darknesslevel;
int maxshade;
int minshade;
int baseminshade;
int basemaxshade;
int viewheight;
int viewwidth;
longword heightnumerator;
fixed scale;
int screenofs;
int centerx;
int centery;
int centeryfrac;
int fulllight;
int weaponscale;
int viewsize;
byte * colormap;
byte * redmap;
byte * greenmap;
byte * playermaps[MAXPLAYERCOLORS];
//short pixelangle[MAXVIEWWIDTH];
short pixelangle[MAXSCREENWIDTH];
byte gammatable[GAMMAENTRIES];
int gammaindex;
int focalwidth=160;
int yzangleconverter;
byte uniformcolors[MAXPLAYERCOLORS]= {
25,
222,
29,
206,
52,
6,
155,
16,
90,
129,
109
};
/*
=============================================================================
LOCAL
=============================================================================
*/
static char *YourComputerSucksString = "Buy a 486! :)";
static int viewsizes[MAXVIEWSIZES*2]= { 80,48,
128,72,
160,88,
192,104,
224,120,
256,136,
288,152,
320,168,
320,184,
320,200,
320,200
};
static int ColorMapLoaded=0;
static int lightningtime=0;
static int lightningdelta=0;
static int lightningdistance=0;
static int lightningsoundtime=0;
static boolean periodic=false;
static int periodictime=0;
void SetViewDelta ( void );
void UpdatePeriodicLighting (void);
/*
====================
=
= ResetFocalWidth
=
====================
*/
void ResetFocalWidth ( void )
{
focalwidth=iGLOBAL_FOCALWIDTH;//FOCALWIDTH;
SetViewDelta();
}
/*
====================
=
= ChangeFocalWidth
=
====================
*/
void ChangeFocalWidth ( int amount )
{
focalwidth=iGLOBAL_FOCALWIDTH+amount;//FOCALWIDTH+amount;
SetViewDelta();
}
/*
====================
=
= SetViewDelta
=
====================
*/
void SetViewDelta ( void )
{
//iGLOBAL_SCREENHEIGHT
//iGLOBAL_SCREENWIDTH
//
// calculate scale value for vertical height calculations
// and sprite x calculations
//
scale = (centerx*focalwidth)/(160);
//
// divide heightnumerator by a posts distance to get the posts height for
// the heightbuffer. The pixel height is height>>HEIGHTFRACTION
//
heightnumerator = (((focalwidth/10)*centerx*4096)<<HEIGHTFRACTION);
}
/*
====================
=
= CalcProjection
=
====================
*/
void CalcProjection ( void )
{
int i;
int frac;
int intang;
byte * table;
byte * ptr;
int length;
int * pangle;
// Already being called in ResetFocalWidth
// SetViewDelta();
//
// load in tables file
//
//Hey, isn't this stuff already loaded in?
//Why don't we make this a lump?
table=W_CacheLumpName("tables",PU_STATIC, CvtNull, 1);
ptr=table;
//
// get size of table
//
memcpy(&length,ptr,sizeof(int));
SwapIntelLong(&length);
ptr+=sizeof(int);
pangle=SafeMalloc(length*sizeof(int));
memcpy(pangle,ptr,length*sizeof(int));
frac=((length*65536/centerx))>>1;
for (i=0; i<centerx; i++)
{
// start 1/2 pixel over, so viewangle bisects two middle pixels
intang=pangle[frac>>16];
SwapIntelLong(&intang);
pixelangle[centerx-1-i] =(short) intang;
pixelangle[centerx+i] =(short) -intang;
frac+=(length*65536/centerx);
}
table=W_CacheLumpName("tables",PU_CACHE, CvtNull, 1);
SafeFree(pangle);
}
/*
==========================
=
= SetViewSize
=
==========================
*/
extern int hudRescaleFactor;
void SetViewSize
(
int size
)
{
int height;
int maxheight;
int screenx;
int screeny;
int topy;
/*
if (size>=10){
SetTextMode ( );
screenx=screenx;
return;
}
*/
height = 0;
for (height = 0; height < 21;)
{
viewsizes[height++] = iGLOBAL_SCREENWIDTH;
viewsizes[height++] = iGLOBAL_SCREENHEIGHT;
}
if ((size<0) || (size>=MAXVIEWSIZES)) { //bna added
printf("Illegal screen size = %d\n",size);
size = 8;//set default value
viewsize = 8;
}
//if ((size<0) || (size>=MAXVIEWSIZES))
// Error("Illegal screen size = %ld\n",size);
viewwidth = viewsizes[ size << 1 ]; // must be divisable by 16
viewheight = viewsizes[ ( size << 1 ) + 1 ]; // must be even
maxheight = iGLOBAL_SCREENHEIGHT;
topy = 0;
// Only keep the kills flag
StatusBar &= ~( BOTTOM_STATUS_BAR | TOP_STATUS_BAR |
STATUS_PLAYER_STATS );
if ( SHOW_KILLS() )
{
// Account for height of kill boxes
maxheight -= 24;
}
if ( size < 9 )
{
StatusBar |= TOP_STATUS_BAR;
// Account for height of top status bar
maxheight -= 16 * hudRescaleFactor;
topy += 16 * hudRescaleFactor;
}
// if ( size == 7 ){maxheight -= 16;}//bna++
// if ( size <= 6 ){topy -= 8;}//bna++
if ( size < 8 )
{
// Turn on health and ammo bar
StatusBar |= BOTTOM_STATUS_BAR;
maxheight -= 16 * hudRescaleFactor;
}
else if ( size < 10 )
{
// Turn on transparent health and ammo bar
StatusBar |= STATUS_PLAYER_STATS;
}
// SetTextMode ( );
// viewheight=viewheight;
height = viewheight;
if ( height > 168*iGLOBAL_SCREENHEIGHT/200 )
{
// Prevent weapon from being scaled too big
height = 168*iGLOBAL_SCREENHEIGHT/200;
}
weaponscale = ( height << 16 ) / 168;//( height << 16 ) = 170 * 65536
centerx = viewwidth >> 1;
centery = viewheight >> 1;
centeryfrac = (centery << 16);
yzangleconverter = ( 0xaf85 * viewheight ) / 300;
// Center the view horizontally
screenx = ( iGLOBAL_SCREENWIDTH - viewwidth ) >> 1;
if ( viewheight >= maxheight )
{
screeny = topy;
viewheight = maxheight;
}
else
{
// Center the view vertically
screeny = ( ( maxheight - viewheight ) >> 1 ) + topy;
}
// Calculate offset of view window
screenofs = screenx + ylookup[ screeny ];
//
// calculate trace angles and projection constants
//
ResetFocalWidth();
// Already being called in ResetFocalWidth
// SetViewDelta();
CalcProjection();
}
//******************************************************************************
//
// DrawCPUJape ()
//
//******************************************************************************
void DrawCPUJape
(
void
)
{
int width;
int height;
CurrentFont = tinyfont;
VW_MeasurePropString( YourComputerSucksString, &width, &height );
DrawGameString( 160 - width / 2, 100 + 48 / 2 + 2,
YourComputerSucksString, true );
}
/*
==========================
=
= SetupScreen
=
==========================
*/
void SetupScreen ( boolean flip )
{
pic_t *shape;
SetViewSize(viewsize);
if ( viewsize < 7 )
{
shape = ( pic_t * )W_CacheLumpName( "backtile", PU_CACHE, Cvt_pic_t, 1 );
//DrawTiledRegion( 0, 16, 320, 200 - 32, 0, 16, shape );
DrawTiledRegion( 0, 16*hudRescaleFactor, iGLOBAL_SCREENWIDTH, iGLOBAL_SCREENHEIGHT - 16*hudRescaleFactor, 0, 16, shape );//bna++
}
if ( viewsize == 0 )
{
DrawCPUJape();
}
if (flip == true){
boolean wasStretched = false;
if(StretchScreen)
{
wasStretched = true;
}
DisableScreenStretch();
DrawPlayScreen (true);
ThreeDRefresh();
if (wasStretched == true)
{
EnableScreenStretch();
}
}
}
void LoadColorMap( void )
{
int i,j;
int lump, length;
if (ColorMapLoaded==1)
Error("Called LoadColorMap twice\n");
ColorMapLoaded=1;
//
// load in the light tables
// 256 byte align tables
//
lump = W_GetNumForName("colormap");
length = W_LumpLength (lump) + 255;
colormap = SafeMalloc (length);
colormap = (byte *)( ((long)colormap + 255)&~0xff);
W_ReadLump (lump,colormap);
// Fix fire colors in colormap
for (i=31; i>=16; i--)
for (j=0xea; j<0xf9; j++)
colormap[i*256+j]=colormap[(((i-16)/4+16))*256+j];
// Get special maps
lump = W_GetNumForName("specmaps");
length = W_LumpLength (lump+1) + 255;
redmap = SafeMalloc (length);
redmap = (byte *)( ((long)redmap + 255)&~0xff);
W_ReadLump (lump+1,redmap);
greenmap = redmap+(16*256);
// Get player colormaps
// if (modemgame==true)
{
lump = W_GetNumForName("playmaps")+1;
for (i=0; i<MAXPLAYERCOLORS; i++)
{
length = W_LumpLength (lump+i) + 255;
playermaps[i] = SafeMalloc (length);
playermaps[i] = (byte *)( ((long)playermaps[i] + 255)&~0xff);
W_ReadLump (lump+i,playermaps[i]);
}
}
if (!quiet)
printf("RT_VIEW: Colormaps Initialized\n");
}
/*
==========================
=
= SetupLightLevels
=
==========================
*/
#define LIGHTRATEBASE 252
#define LIGHTRATEEND 267
#define LIGHTLEVELBASE 216
#define LIGHTLEVELEND 223
void SetupLightLevels ( void )
{
int glevel;
periodic=false;
fog=0;
lightsource=0;
// Set up light level for level
if (((word)MAPSPOT(2,0,1)>=104) && ((word)MAPSPOT(2,0,1)<=105))
fog=(word)MAPSPOT(2,0,1)-104;
else
Error ("There is no Fog icon on map %d\n",gamestate.mapon);
if ((word)MAPSPOT(3,0,1)==139)
{
if (fog==0)
{
lightsource=1;
lights=Z_Malloc(MAPSIZE*MAPSIZE*(sizeof(unsigned long)),PU_LEVEL,NULL);
memset (lights,0,MAPSIZE*MAPSIZE*(sizeof(unsigned long)));
}
else
Error("You cannot use light sourcing on a level with fog on map %d\n",gamestate.mapon);
}
else if ((word)MAPSPOT(3,0,1))
Error("You must use the lightsource icon or nothing at all at (3,0) in plane 1 on map %d\n",gamestate.mapon);
if (((word)MAPSPOT(2,0,0)>=LIGHTLEVELBASE) && ((word)MAPSPOT(2,0,0)<=LIGHTLEVELEND))
glevel=(MAPSPOT(2,0,0)-LIGHTLEVELBASE);
else
Error("You must specify a valid darkness level icon at (2,0) on map %d\n",gamestate.mapon);
SetLightLevels ( glevel );
if (((word)MAPSPOT(3,0,0)>=LIGHTRATEBASE) && ((word)MAPSPOT(3,0,0)<=LIGHTRATEEND))
glevel=(MAPSPOT(3,0,0)-LIGHTRATEBASE);
else
{
// Error("You must specify a valid darkness rate icon at (3,0) on map %ld\n",gamestate.mapon);
glevel = 4;
}
SetLightRate ( glevel );
lightningtime=0;
lightningdistance=0;
lightninglevel=0;
lightningdelta=0;
lightningsoundtime=0;
}
/*
==========================
=
= SetLightLevels
=
==========================
*/
void SetLightLevels ( int darkness )
{
if (fog==0)
{
baseminshade=0x10+((7-darkness)>>1);
basemaxshade=0x1f-(darkness>>1);
}
else
{
baseminshade=darkness;
basemaxshade=0x10;
}
minshade=baseminshade;
maxshade=basemaxshade;
darknesslevel=darkness;
}
/*
==========================
=
= GetLightLevelTile
=
==========================
*/
int GetLightLevelTile ( void )
{
if (fog==0)
{
return ((7-((baseminshade-0x10)<<1))+LIGHTLEVELBASE);
}
else
{
return (baseminshade+LIGHTLEVELBASE);
}
}
/*
==========================
=
= SetLightRate
=
==========================
*/
void SetLightRate ( int rate )
{
normalshade=(HEIGHTFRACTION+8)-rate;
if (normalshade>14) normalshade=14;
if (normalshade<3) normalshade=3;
}
/*
==========================
=
= GetLightRate
=
==========================
*/
int GetLightRate ( void )
{
return ((HEIGHTFRACTION+8)-normalshade);
}
/*
==========================
=
= GetLightRateTile
=
==========================
*/
int GetLightRateTile ( void )
{
return ((HEIGHTFRACTION+8)-normalshade+LIGHTRATEBASE);
}
/*
==========================
=
= UpdateLightLevel
=
==========================
*/
void UpdateLightLevel (int area)
{
int numlights;
int targetmin;
int targetmax;
int numtiles;
if (fog==true)
return;
numtiles=(numareatiles[area]>>5)-2;
numlights=(LightsInArea[area]-numtiles)>>1;
if (numlights<0)
numlights=0;
if (numlights>GENERALNUMLIGHTS)
numlights=GENERALNUMLIGHTS;
targetmin=baseminshade+(GENERALNUMLIGHTS-numlights);
targetmax=basemaxshade-numlights;
if (targetmax<baseminshade)
targetmax=baseminshade;
if (targetmin>targetmax)
targetmin=targetmax;
if (minshade>targetmin)
minshade-=1;
else if (minshade<targetmin)
minshade+=1;
if (maxshade>targetmax)
maxshade-=1;
else if (maxshade<targetmax)
maxshade+=1;
}
/*
==========================
=
= SetIllumination
=
= Postive value lightens
= Negative value darkens
=
==========================
*/
void SetIllumination (int level)
{
if (fog)
return;
maxshade-=level;
if (maxshade>31)
maxshade=31;
if (maxshade<0x10)
maxshade=0x10;
minshade-=level;
if (minshade<0x10)
minshade=0x10;
if (minshade>31)
minshade=31;
}
/*
==========================
=
= GetIlluminationDelta
=
==========================
*/
int GetIlluminationDelta (void)
{
if (fog)
return 0;
else
return maxshade-basemaxshade;
}
/*
==========================
=
= UpdateLightning
=
==========================
*/
void UpdateLightning (void)
{
if (periodic==true)
{
UpdatePeriodicLighting();
return;
}
if ((fog==1) || (lightning==false))
return;
if (lightningtime<=0)
{
if (lightningsoundtime>0)
SD_Play3D (SD_LIGHTNINGSND, 0, lightningdistance);
lightningtime=GameRandomNumber("UpdateLightning",0)<<1;
lightningdistance=GameRandomNumber("UpdateLightning",0);
lightninglevel=(255-lightningdistance)>>LIGHTNINGLEVEL;
if (lightninglevel<MINLIGHTNINGLEVEL)
lightninglevel=MINLIGHTNINGLEVEL;
if (lightninglevel>MAXLIGHTNINGLEVEL)
lightninglevel=MAXLIGHTNINGLEVEL;
lightningdelta=lightninglevel>>1;
lightningsoundtime=lightningdistance>>1;
if (lightningdistance<100)
{
SetIllumination(lightninglevel);
}
}
else if (lightninglevel>0)
{
lightninglevel-=lightningdelta;
if (lightninglevel<=0)
{
lightninglevel=0;
}
}
else
lightningtime--;
if (lightningsoundtime)
{
lightningsoundtime--;
if (lightningsoundtime<=0)
{
int volume;
volume=255-lightningdistance;
if (volume>170) volume=170;
SD_PlayPitchedSound ( SD_LIGHTNINGSND, volume,-(lightningdistance<<2));
lightningsoundtime=0;
}
}
}
/*
==========================
=
= UpdatePeriodicLighting
=
==========================
*/
#define PERIODICMAG (6)
#define PERIODICSTEP (20)
#define PERIODICBASE (0x0f)
void UpdatePeriodicLighting (void)
{
int val;
val=FixedMul(PERIODICMAG,sintable[periodictime]);
periodictime=(periodictime+PERIODICSTEP)&(FINEANGLES-1);
basemaxshade=PERIODICBASE+(PERIODICMAG)+val;
baseminshade=basemaxshade-GENERALNUMLIGHTS-1;
}
/*
==========================
=
= SetModemLightLevel
=
==========================
*/
void SetModemLightLevel ( int type )
{
periodic=false;
fulllight=false;
switch (type)
{
case bo_light_dark:
MAPSPOT(2,0,0)=(word)216;
MAPSPOT(3,0,0)=(word)255;
MAPSPOT(3,0,1)=(word)139;
MAPSPOT(2,0,1)=(word)104;
SetupLightLevels ();
break;
case bo_light_normal:
break;
case bo_light_bright:
MAPSPOT(2,0,0)=(word)223;
MAPSPOT(3,0,0)=(word)267;
MAPSPOT(3,0,1)=(word)0;
MAPSPOT(2,0,1)=(word)104;
SetupLightLevels ();
break;
case bo_light_fog:
MAPSPOT(2,0,0)=(word)219;
MAPSPOT(3,0,0)=(word)259;
MAPSPOT(2,0,1)=(word)105;
MAPSPOT(3,0,1)=(word)0;
SetupLightLevels ();
break;
case bo_light_periodic:
fog=0;
MAPSPOT(2,0,1)=(word)104;
MAPSPOT(3,0,1)=(word)139;
SetupLightLevels ();
periodic=true;
break;
case bo_light_lightning:
if (sky!=0)
{
MAPSPOT(2,0,0)=(word)222;
MAPSPOT(3,0,0)=(word)255;
MAPSPOT(3,0,1)=(word)139;
MAPSPOT(2,0,1)=(word)104;
SetupLightLevels ();
lightning=true;
}
break;
}
}