forked from KolibriOS/kolibrios
899 lines
16 KiB
C
Executable File
899 lines
16 KiB
C
Executable File
// 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:
|
|
// Rendering main loop and setup functions,
|
|
// utility functions (BSP, geometry, trigonometry).
|
|
// See tables.c, too.
|
|
//
|
|
//-----------------------------------------------------------------------------
|
|
|
|
|
|
static const char rcsid[] = "$Id: r_main.c,v 1.5 1997/02/03 22:45:12 b1 Exp $";
|
|
|
|
|
|
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
|
|
|
|
#include "doomdef.h"
|
|
#include "d_net.h"
|
|
|
|
#include "m_bbox.h"
|
|
|
|
#include "r_local.h"
|
|
#include "r_sky.h"
|
|
|
|
|
|
|
|
|
|
|
|
// Fineangles in the SCREENWIDTH wide window.
|
|
#define FIELDOFVIEW 2048
|
|
|
|
|
|
|
|
int viewangleoffset;
|
|
|
|
// increment every time a check is made
|
|
int validcount = 1;
|
|
|
|
|
|
lighttable_t* fixedcolormap;
|
|
extern lighttable_t** walllights;
|
|
|
|
int centerx;
|
|
int centery;
|
|
|
|
fixed_t centerxfrac;
|
|
fixed_t centeryfrac;
|
|
fixed_t projection;
|
|
|
|
// just for profiling purposes
|
|
int framecount;
|
|
|
|
int sscount;
|
|
int linecount;
|
|
int loopcount;
|
|
|
|
fixed_t viewx;
|
|
fixed_t viewy;
|
|
fixed_t viewz;
|
|
|
|
angle_t viewangle;
|
|
|
|
fixed_t viewcos;
|
|
fixed_t viewsin;
|
|
|
|
player_t* viewplayer;
|
|
|
|
// 0 = high, 1 = low
|
|
int detailshift;
|
|
|
|
//
|
|
// precalculated math tables
|
|
//
|
|
angle_t clipangle;
|
|
|
|
// The viewangletox[viewangle + FINEANGLES/4] lookup
|
|
// maps the visible view angles to screen X coordinates,
|
|
// flattening the arc to a flat projection plane.
|
|
// There will be many angles mapped to the same X.
|
|
int viewangletox[FINEANGLES/2];
|
|
|
|
// The xtoviewangleangle[] table maps a screen pixel
|
|
// to the lowest viewangle that maps back to x ranges
|
|
// from clipangle to -clipangle.
|
|
angle_t xtoviewangle[SCREENWIDTH+1];
|
|
|
|
|
|
// UNUSED.
|
|
// The finetangentgent[angle+FINEANGLES/4] table
|
|
// holds the fixed_t tangent values for view angles,
|
|
// ranging from MININT to 0 to MAXINT.
|
|
// fixed_t finetangent[FINEANGLES/2];
|
|
|
|
// fixed_t finesine[5*FINEANGLES/4];
|
|
fixed_t* finecosine = &finesine[FINEANGLES/4];
|
|
|
|
|
|
lighttable_t* scalelight[LIGHTLEVELS][MAXLIGHTSCALE];
|
|
lighttable_t* scalelightfixed[MAXLIGHTSCALE];
|
|
lighttable_t* zlight[LIGHTLEVELS][MAXLIGHTZ];
|
|
|
|
// bumped light from gun blasts
|
|
int extralight;
|
|
|
|
|
|
|
|
void (*colfunc) (void);
|
|
void (*basecolfunc) (void);
|
|
void (*fuzzcolfunc) (void);
|
|
void (*transcolfunc) (void);
|
|
void (*spanfunc) (void);
|
|
|
|
|
|
|
|
//
|
|
// R_AddPointToBox
|
|
// Expand a given bbox
|
|
// so that it encloses a given point.
|
|
//
|
|
void
|
|
R_AddPointToBox
|
|
( int x,
|
|
int y,
|
|
fixed_t* box )
|
|
{
|
|
if (x< box[BOXLEFT])
|
|
box[BOXLEFT] = x;
|
|
if (x> box[BOXRIGHT])
|
|
box[BOXRIGHT] = x;
|
|
if (y< box[BOXBOTTOM])
|
|
box[BOXBOTTOM] = y;
|
|
if (y> box[BOXTOP])
|
|
box[BOXTOP] = y;
|
|
}
|
|
|
|
|
|
//
|
|
// R_PointOnSide
|
|
// Traverse BSP (sub) tree,
|
|
// check point against partition plane.
|
|
// Returns side 0 (front) or 1 (back).
|
|
//
|
|
int
|
|
R_PointOnSide
|
|
( fixed_t x,
|
|
fixed_t y,
|
|
node_t* node )
|
|
{
|
|
fixed_t dx;
|
|
fixed_t dy;
|
|
fixed_t left;
|
|
fixed_t right;
|
|
|
|
if (!node->dx)
|
|
{
|
|
if (x <= node->x)
|
|
return node->dy > 0;
|
|
|
|
return node->dy < 0;
|
|
}
|
|
if (!node->dy)
|
|
{
|
|
if (y <= node->y)
|
|
return node->dx < 0;
|
|
|
|
return node->dx > 0;
|
|
}
|
|
|
|
dx = (x - node->x);
|
|
dy = (y - node->y);
|
|
|
|
// Try to quickly decide by looking at sign bits.
|
|
if ( (node->dy ^ node->dx ^ dx ^ dy)&0x80000000 )
|
|
{
|
|
if ( (node->dy ^ dx) & 0x80000000 )
|
|
{
|
|
// (left is negative)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
left = FixedMul ( node->dy>>FRACBITS , dx );
|
|
right = FixedMul ( dy , node->dx>>FRACBITS );
|
|
|
|
if (right < left)
|
|
{
|
|
// front side
|
|
return 0;
|
|
}
|
|
// back side
|
|
return 1;
|
|
}
|
|
|
|
|
|
int
|
|
R_PointOnSegSide
|
|
( fixed_t x,
|
|
fixed_t y,
|
|
seg_t* line )
|
|
{
|
|
fixed_t lx;
|
|
fixed_t ly;
|
|
fixed_t ldx;
|
|
fixed_t ldy;
|
|
fixed_t dx;
|
|
fixed_t dy;
|
|
fixed_t left;
|
|
fixed_t right;
|
|
|
|
lx = line->v1->x;
|
|
ly = line->v1->y;
|
|
|
|
ldx = line->v2->x - lx;
|
|
ldy = line->v2->y - ly;
|
|
|
|
if (!ldx)
|
|
{
|
|
if (x <= lx)
|
|
return ldy > 0;
|
|
|
|
return ldy < 0;
|
|
}
|
|
if (!ldy)
|
|
{
|
|
if (y <= ly)
|
|
return ldx < 0;
|
|
|
|
return ldx > 0;
|
|
}
|
|
|
|
dx = (x - lx);
|
|
dy = (y - ly);
|
|
|
|
// Try to quickly decide by looking at sign bits.
|
|
if ( (ldy ^ ldx ^ dx ^ dy)&0x80000000 )
|
|
{
|
|
if ( (ldy ^ dx) & 0x80000000 )
|
|
{
|
|
// (left is negative)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
left = FixedMul ( ldy>>FRACBITS , dx );
|
|
right = FixedMul ( dy , ldx>>FRACBITS );
|
|
|
|
if (right < left)
|
|
{
|
|
// front side
|
|
return 0;
|
|
}
|
|
// back side
|
|
return 1;
|
|
}
|
|
|
|
|
|
//
|
|
// R_PointToAngle
|
|
// To get a global angle from cartesian coordinates,
|
|
// the coordinates are flipped until they are in
|
|
// the first octant of the coordinate system, then
|
|
// the y (<=x) is scaled and divided by x to get a
|
|
// tangent (slope) value which is looked up in the
|
|
// tantoangle[] table.
|
|
|
|
//
|
|
|
|
|
|
|
|
|
|
angle_t
|
|
R_PointToAngle
|
|
( fixed_t x,
|
|
fixed_t y )
|
|
{
|
|
x -= viewx;
|
|
y -= viewy;
|
|
|
|
if ( (!x) && (!y) )
|
|
return 0;
|
|
|
|
if (x>= 0)
|
|
{
|
|
// x >=0
|
|
if (y>= 0)
|
|
{
|
|
// y>= 0
|
|
|
|
if (x>y)
|
|
{
|
|
// octant 0
|
|
return tantoangle[ SlopeDiv(y,x)];
|
|
}
|
|
else
|
|
{
|
|
// octant 1
|
|
return ANG90-1-tantoangle[ SlopeDiv(x,y)];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// y<0
|
|
y = -y;
|
|
|
|
if (x>y)
|
|
{
|
|
// octant 8
|
|
return -tantoangle[SlopeDiv(y,x)];
|
|
}
|
|
else
|
|
{
|
|
// octant 7
|
|
return ANG270+tantoangle[ SlopeDiv(x,y)];
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// x<0
|
|
x = -x;
|
|
|
|
if (y>= 0)
|
|
{
|
|
// y>= 0
|
|
if (x>y)
|
|
{
|
|
// octant 3
|
|
return ANG180-1-tantoangle[ SlopeDiv(y,x)];
|
|
}
|
|
else
|
|
{
|
|
// octant 2
|
|
return ANG90+ tantoangle[ SlopeDiv(x,y)];
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// y<0
|
|
y = -y;
|
|
|
|
if (x>y)
|
|
{
|
|
// octant 4
|
|
return ANG180+tantoangle[ SlopeDiv(y,x)];
|
|
}
|
|
else
|
|
{
|
|
// octant 5
|
|
return ANG270-1-tantoangle[ SlopeDiv(x,y)];
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
angle_t
|
|
R_PointToAngle2
|
|
( fixed_t x1,
|
|
fixed_t y1,
|
|
fixed_t x2,
|
|
fixed_t y2 )
|
|
{
|
|
viewx = x1;
|
|
viewy = y1;
|
|
|
|
return R_PointToAngle (x2, y2);
|
|
}
|
|
|
|
|
|
fixed_t
|
|
R_PointToDist
|
|
( fixed_t x,
|
|
fixed_t y )
|
|
{
|
|
int angle;
|
|
fixed_t dx;
|
|
fixed_t dy;
|
|
fixed_t temp;
|
|
fixed_t dist;
|
|
|
|
dx = abs(x - viewx);
|
|
dy = abs(y - viewy);
|
|
|
|
if (dy>dx)
|
|
{
|
|
temp = dx;
|
|
dx = dy;
|
|
dy = temp;
|
|
}
|
|
|
|
angle = (tantoangle[ FixedDiv(dy,dx)>>DBITS ]+ANG90) >> ANGLETOFINESHIFT;
|
|
|
|
// use as cosine
|
|
dist = FixedDiv (dx, finesine[angle] );
|
|
|
|
return dist;
|
|
}
|
|
|
|
|
|
|
|
|
|
//
|
|
// R_InitPointToAngle
|
|
//
|
|
void R_InitPointToAngle (void)
|
|
{
|
|
// UNUSED - now getting from tables.c
|
|
#if 0
|
|
int i;
|
|
long t;
|
|
float f;
|
|
//
|
|
// slope (tangent) to angle lookup
|
|
//
|
|
for (i=0 ; i<=SLOPERANGE ; i++)
|
|
{
|
|
f = atan( (float)i/SLOPERANGE )/(3.141592657*2);
|
|
t = 0xffffffff*f;
|
|
tantoangle[i] = t;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
//
|
|
// R_ScaleFromGlobalAngle
|
|
// Returns the texture mapping scale
|
|
// for the current line (horizontal span)
|
|
// at the given angle.
|
|
// rw_distance must be calculated first.
|
|
//
|
|
fixed_t R_ScaleFromGlobalAngle (angle_t visangle)
|
|
{
|
|
fixed_t scale;
|
|
int anglea;
|
|
int angleb;
|
|
int sinea;
|
|
int sineb;
|
|
fixed_t num;
|
|
int den;
|
|
|
|
// UNUSED
|
|
#if 0
|
|
{
|
|
fixed_t dist;
|
|
fixed_t z;
|
|
fixed_t sinv;
|
|
fixed_t cosv;
|
|
|
|
sinv = finesine[(visangle-rw_normalangle)>>ANGLETOFINESHIFT];
|
|
dist = FixedDiv (rw_distance, sinv);
|
|
cosv = finecosine[(viewangle-visangle)>>ANGLETOFINESHIFT];
|
|
z = abs(FixedMul (dist, cosv));
|
|
scale = FixedDiv(projection, z);
|
|
return scale;
|
|
}
|
|
#endif
|
|
|
|
anglea = ANG90 + (visangle-viewangle);
|
|
angleb = ANG90 + (visangle-rw_normalangle);
|
|
|
|
// both sines are allways positive
|
|
sinea = finesine[anglea>>ANGLETOFINESHIFT];
|
|
sineb = finesine[angleb>>ANGLETOFINESHIFT];
|
|
num = FixedMul(projection,sineb)<<detailshift;
|
|
den = FixedMul(rw_distance,sinea);
|
|
|
|
if (den > num>>16)
|
|
{
|
|
scale = FixedDiv (num, den);
|
|
|
|
if (scale > 64*FRACUNIT)
|
|
scale = 64*FRACUNIT;
|
|
else if (scale < 256)
|
|
scale = 256;
|
|
}
|
|
else
|
|
scale = 64*FRACUNIT;
|
|
|
|
return scale;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_InitTables
|
|
//
|
|
void R_InitTables (void)
|
|
{
|
|
// UNUSED: now getting from tables.c
|
|
#if 0
|
|
int i;
|
|
float a;
|
|
float fv;
|
|
int t;
|
|
|
|
// viewangle tangent table
|
|
for (i=0 ; i<FINEANGLES/2 ; i++)
|
|
{
|
|
a = (i-FINEANGLES/4+0.5)*PI*2/FINEANGLES;
|
|
fv = FRACUNIT*tan (a);
|
|
t = fv;
|
|
finetangent[i] = t;
|
|
}
|
|
|
|
// finesine table
|
|
for (i=0 ; i<5*FINEANGLES/4 ; i++)
|
|
{
|
|
// OPTIMIZE: mirror...
|
|
a = (i+0.5)*PI*2/FINEANGLES;
|
|
t = FRACUNIT*sin (a);
|
|
finesine[i] = t;
|
|
}
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_InitTextureMapping
|
|
//
|
|
void R_InitTextureMapping (void)
|
|
{
|
|
int i;
|
|
int x;
|
|
int t;
|
|
fixed_t focallength;
|
|
|
|
// Use tangent table to generate viewangletox:
|
|
// viewangletox will give the next greatest x
|
|
// after the view angle.
|
|
//
|
|
// Calc focallength
|
|
// so FIELDOFVIEW angles covers SCREENWIDTH.
|
|
focallength = FixedDiv (centerxfrac,
|
|
finetangent[FINEANGLES/4+FIELDOFVIEW/2] );
|
|
|
|
for (i=0 ; i<FINEANGLES/2 ; i++)
|
|
{
|
|
if (finetangent[i] > FRACUNIT*2)
|
|
t = -1;
|
|
else if (finetangent[i] < -FRACUNIT*2)
|
|
t = viewwidth+1;
|
|
else
|
|
{
|
|
t = FixedMul (finetangent[i], focallength);
|
|
t = (centerxfrac - t+FRACUNIT-1)>>FRACBITS;
|
|
|
|
if (t < -1)
|
|
t = -1;
|
|
else if (t>viewwidth+1)
|
|
t = viewwidth+1;
|
|
}
|
|
viewangletox[i] = t;
|
|
}
|
|
|
|
// Scan viewangletox[] to generate xtoviewangle[]:
|
|
// xtoviewangle will give the smallest view angle
|
|
// that maps to x.
|
|
for (x=0;x<=viewwidth;x++)
|
|
{
|
|
i = 0;
|
|
while (viewangletox[i]>x)
|
|
i++;
|
|
xtoviewangle[x] = (i<<ANGLETOFINESHIFT)-ANG90;
|
|
}
|
|
|
|
// Take out the fencepost cases from viewangletox.
|
|
for (i=0 ; i<FINEANGLES/2 ; i++)
|
|
{
|
|
t = FixedMul (finetangent[i], focallength);
|
|
t = centerx - t;
|
|
|
|
if (viewangletox[i] == -1)
|
|
viewangletox[i] = 0;
|
|
else if (viewangletox[i] == viewwidth+1)
|
|
viewangletox[i] = viewwidth;
|
|
}
|
|
|
|
clipangle = xtoviewangle[0];
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_InitLightTables
|
|
// Only inits the zlight table,
|
|
// because the scalelight table changes with view size.
|
|
//
|
|
#define DISTMAP 2
|
|
|
|
void R_InitLightTables (void)
|
|
{
|
|
int i;
|
|
int j;
|
|
int level;
|
|
int startmap;
|
|
int scale;
|
|
|
|
// Calculate the light levels to use
|
|
// for each level / distance combination.
|
|
for (i=0 ; i< LIGHTLEVELS ; i++)
|
|
{
|
|
startmap = ((LIGHTLEVELS-1-i)*2)*NUMCOLORMAPS/LIGHTLEVELS;
|
|
for (j=0 ; j<MAXLIGHTZ ; j++)
|
|
{
|
|
scale = FixedDiv ((SCREENWIDTH/2*FRACUNIT), (j+1)<<LIGHTZSHIFT);
|
|
scale >>= LIGHTSCALESHIFT;
|
|
level = startmap - scale/DISTMAP;
|
|
|
|
if (level < 0)
|
|
level = 0;
|
|
|
|
if (level >= NUMCOLORMAPS)
|
|
level = NUMCOLORMAPS-1;
|
|
|
|
zlight[i][j] = colormaps + level*256;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_SetViewSize
|
|
// Do not really change anything here,
|
|
// because it might be in the middle of a refresh.
|
|
// The change will take effect next refresh.
|
|
//
|
|
boolean setsizeneeded;
|
|
int setblocks;
|
|
int setdetail;
|
|
|
|
|
|
void
|
|
R_SetViewSize
|
|
( int blocks,
|
|
int detail )
|
|
{
|
|
setsizeneeded = true;
|
|
setblocks = blocks;
|
|
setdetail = detail;
|
|
}
|
|
|
|
|
|
//
|
|
// R_ExecuteSetViewSize
|
|
//
|
|
void R_ExecuteSetViewSize (void)
|
|
{
|
|
fixed_t cosadj;
|
|
fixed_t dy;
|
|
int i;
|
|
int j;
|
|
int level;
|
|
int startmap;
|
|
|
|
setsizeneeded = false;
|
|
|
|
if (setblocks == 11)
|
|
{
|
|
scaledviewwidth = SCREENWIDTH;
|
|
viewheight = SCREENHEIGHT;
|
|
}
|
|
else
|
|
{
|
|
scaledviewwidth = setblocks*32;
|
|
viewheight = (setblocks*168/10)&~7;
|
|
}
|
|
|
|
detailshift = setdetail;
|
|
viewwidth = scaledviewwidth>>detailshift;
|
|
|
|
centery = viewheight/2;
|
|
centerx = viewwidth/2;
|
|
centerxfrac = centerx<<FRACBITS;
|
|
centeryfrac = centery<<FRACBITS;
|
|
projection = centerxfrac;
|
|
|
|
if (!detailshift)
|
|
{
|
|
colfunc = basecolfunc = R_DrawColumn;
|
|
fuzzcolfunc = R_DrawFuzzColumn;
|
|
transcolfunc = R_DrawTranslatedColumn;
|
|
spanfunc = R_DrawSpan;
|
|
}
|
|
else
|
|
{
|
|
colfunc = basecolfunc = R_DrawColumnLow;
|
|
fuzzcolfunc = R_DrawFuzzColumn;
|
|
transcolfunc = R_DrawTranslatedColumn;
|
|
spanfunc = R_DrawSpanLow;
|
|
}
|
|
|
|
R_InitBuffer (scaledviewwidth, viewheight);
|
|
|
|
R_InitTextureMapping ();
|
|
|
|
// psprite scales
|
|
pspritescale = FRACUNIT*viewwidth/SCREENWIDTH;
|
|
pspriteiscale = FRACUNIT*SCREENWIDTH/viewwidth;
|
|
|
|
// thing clipping
|
|
for (i=0 ; i<viewwidth ; i++)
|
|
screenheightarray[i] = viewheight;
|
|
|
|
// planes
|
|
for (i=0 ; i<viewheight ; i++)
|
|
{
|
|
dy = ((i-viewheight/2)<<FRACBITS)+FRACUNIT/2;
|
|
dy = abs(dy);
|
|
yslope[i] = FixedDiv ( (viewwidth<<detailshift)/2*FRACUNIT, dy);
|
|
}
|
|
|
|
for (i=0 ; i<viewwidth ; i++)
|
|
{
|
|
cosadj = abs(finecosine[xtoviewangle[i]>>ANGLETOFINESHIFT]);
|
|
distscale[i] = FixedDiv (FRACUNIT,cosadj);
|
|
}
|
|
|
|
// Calculate the light levels to use
|
|
// for each level / scale combination.
|
|
for (i=0 ; i< LIGHTLEVELS ; i++)
|
|
{
|
|
startmap = ((LIGHTLEVELS-1-i)*2)*NUMCOLORMAPS/LIGHTLEVELS;
|
|
for (j=0 ; j<MAXLIGHTSCALE ; j++)
|
|
{
|
|
level = startmap - j*SCREENWIDTH/(viewwidth<<detailshift)/DISTMAP;
|
|
|
|
if (level < 0)
|
|
level = 0;
|
|
|
|
if (level >= NUMCOLORMAPS)
|
|
level = NUMCOLORMAPS-1;
|
|
|
|
scalelight[i][j] = colormaps + level*256;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_Init
|
|
//
|
|
extern int detailLevel;
|
|
extern int screenblocks;
|
|
|
|
|
|
|
|
void R_Init (void)
|
|
{
|
|
R_InitData ();
|
|
printf ("\nR_InitData");
|
|
R_InitPointToAngle ();
|
|
printf ("\nR_InitPointToAngle");
|
|
R_InitTables ();
|
|
// viewwidth / viewheight / detailLevel are set by the defaults
|
|
printf ("\nR_InitTables");
|
|
|
|
R_SetViewSize (screenblocks, detailLevel);
|
|
R_InitPlanes ();
|
|
printf ("\nR_InitPlanes");
|
|
R_InitLightTables ();
|
|
printf ("\nR_InitLightTables");
|
|
R_InitSkyMap ();
|
|
printf ("\nR_InitSkyMap");
|
|
R_InitTranslationTables ();
|
|
printf ("\nR_InitTranslationsTables");
|
|
|
|
framecount = 0;
|
|
}
|
|
|
|
|
|
//
|
|
// R_PointInSubsector
|
|
//
|
|
subsector_t*
|
|
R_PointInSubsector
|
|
( fixed_t x,
|
|
fixed_t y )
|
|
{
|
|
node_t* node;
|
|
int side;
|
|
int nodenum;
|
|
|
|
// single subsector is a special case
|
|
if (!numnodes)
|
|
return subsectors;
|
|
|
|
nodenum = numnodes-1;
|
|
|
|
while (! (nodenum & NF_SUBSECTOR) )
|
|
{
|
|
node = &nodes[nodenum];
|
|
side = R_PointOnSide (x, y, node);
|
|
nodenum = node->children[side];
|
|
}
|
|
|
|
return &subsectors[nodenum & ~NF_SUBSECTOR];
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_SetupFrame
|
|
//
|
|
void R_SetupFrame (player_t* player)
|
|
{
|
|
int i;
|
|
|
|
viewplayer = player;
|
|
viewx = player->mo->x;
|
|
viewy = player->mo->y;
|
|
viewangle = player->mo->angle + viewangleoffset;
|
|
extralight = player->extralight;
|
|
|
|
viewz = player->viewz;
|
|
|
|
viewsin = finesine[viewangle>>ANGLETOFINESHIFT];
|
|
viewcos = finecosine[viewangle>>ANGLETOFINESHIFT];
|
|
|
|
sscount = 0;
|
|
|
|
if (player->fixedcolormap)
|
|
{
|
|
fixedcolormap =
|
|
colormaps
|
|
+ player->fixedcolormap*256*sizeof(lighttable_t);
|
|
|
|
walllights = scalelightfixed;
|
|
|
|
for (i=0 ; i<MAXLIGHTSCALE ; i++)
|
|
scalelightfixed[i] = fixedcolormap;
|
|
}
|
|
else
|
|
fixedcolormap = 0;
|
|
|
|
framecount++;
|
|
validcount++;
|
|
}
|
|
|
|
|
|
|
|
//
|
|
// R_RenderView
|
|
//
|
|
void R_RenderPlayerView (player_t* player)
|
|
{
|
|
R_SetupFrame (player);
|
|
|
|
// Clear buffers.
|
|
R_ClearClipSegs ();
|
|
R_ClearDrawSegs ();
|
|
R_ClearPlanes ();
|
|
R_ClearSprites ();
|
|
|
|
// check for new console commands.
|
|
NetUpdate ();
|
|
|
|
// The head node is the last node output.
|
|
R_RenderBSPNode (numnodes-1);
|
|
|
|
// Check for new console commands.
|
|
NetUpdate ();
|
|
|
|
R_DrawPlanes ();
|
|
|
|
// Check for new console commands.
|
|
NetUpdate ();
|
|
|
|
R_DrawMasked ();
|
|
|
|
// Check for new console commands.
|
|
NetUpdate ();
|
|
}
|