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engine.c: cleanup / readability tweaks

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git-svn-id: https://svn.eduke32.com/eduke32@2740 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
helixhorned 2012-06-05 22:21:26 +00:00
parent 2fa7ccf9dd
commit cf429d0e76
1 changed files with 52 additions and 35 deletions
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87
polymer/eduke32/build/src/engine.c
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@ -213,6 +213,8 @@ uint8_t graysectbitmap[MAXSECTORS>>3];
uint8_t graywallbitmap[MAXWALLS>>3];
int32_t autogray = 0, showinnergray = 1;
//#define YAX_DEBUG_YMOSTS
#ifdef YAX_DEBUG
double hitickspersec;
#endif
@ -2929,7 +2931,7 @@ static inline void hline(int32_t xr, int32_t yp)
r = horizlookup2[yp-globalhoriz+horizycent];
asm1 = globalx1*r;
asm2 = globaly2*r;
s = ((int32_t)getpalookup((int32_t)mulscale16(r,globvis),globalshade)<<8);
s = getpalookup(mulscale16(r,globvis),globalshade)<<8;
hlineasm4(xr-xl,0,s,globalx2*r+globalypanning,globaly1*r+globalxpanning,
ylookup[yp]+xr+frameoffset);
@ -2948,7 +2950,7 @@ static inline void slowhline(int32_t xr, int32_t yp)
asm1 = globalx1*r;
asm2 = globaly2*r;
asm3 = (intptr_t)globalpalwritten + ((intptr_t)getpalookup((int32_t)mulscale16(r,globvis),globalshade)<<8);
asm3 = (intptr_t)globalpalwritten + (getpalookup(mulscale16(r,globvis),globalshade)<<8);
if (!(globalorientation&256))
{
mhline(globalbufplc,globaly1*r+globalxpanning-asm1*(xr-xl),(xr-xl)<<16,0L,
@ -2963,21 +2965,22 @@ static inline void slowhline(int32_t xr, int32_t yp)
//
// prepwall (internal)
//
static void prepwall(int32_t z, walltype *wal)
static void prepwall(int32_t z, const walltype *wal)
{
int32_t i, l=0, ol=0, splc, sinc, x, topinc, top, botinc, bot, walxrepeat;
int32_t l=0, ol=0, x;
walxrepeat = (wal->xrepeat<<3);
int32_t walxrepeat = (wal->xrepeat<<3);
//lwall calculation
i = xb1[z]-halfxdimen;
topinc = -(ry1[z]>>2);
botinc = ((ry2[z]-ry1[z])>>8);
top = mulscale5(rx1[z],xdimen)+mulscale2(topinc,i);
bot = mulscale11(rx1[z]-rx2[z],xdimen)+mulscale2(botinc,i);
int32_t tmpx = xb1[z]-halfxdimen;
splc = mulscale19(ry1[z],xdimscale);
sinc = mulscale16(ry2[z]-ry1[z],xdimscale);
const int32_t topinc = -(ry1[z]>>2);
const int32_t botinc = (ry2[z]-ry1[z])>>8;
int32_t top = mulscale5(rx1[z],xdimen) + mulscale2(topinc,tmpx);
int32_t bot = mulscale11(rx1[z]-rx2[z],xdimen) + mulscale2(botinc,tmpx);
const int32_t splc = mulscale19(ry1[z],xdimscale);
const int32_t sinc = mulscale16(ry2[z]-ry1[z],xdimscale);
x = xb1[z];
if (bot != 0)
@ -2989,6 +2992,8 @@ static void prepwall(int32_t z, walltype *wal)
}
while (x+4 <= xb2[z])
{
int32_t i;
top += topinc; bot += botinc;
if (bot != 0)
{
@ -2997,13 +3002,17 @@ static void prepwall(int32_t z, walltype *wal)
l *= walxrepeat;
lwall[x+4] = (l>>18);
}
i = ((ol+l)>>1);
lwall[x+2] = (i>>18);
lwall[x+1] = ((ol+i)>>19);
lwall[x+3] = ((l+i)>>19);
swall[x+2] = ((swall[x]+swall[x+4])>>1);
swall[x+1] = ((swall[x]+swall[x+2])>>1);
swall[x+3] = ((swall[x+4]+swall[x+2])>>1);
i = (ol+l)>>1;
lwall[x+2] = i>>18;
lwall[x+1] = (ol+i)>>19;
lwall[x+3] = (l+i)>>19;
swall[x+2] = (swall[x]+swall[x+4])>>1;
swall[x+1] = (swall[x]+swall[x+2])>>1;
swall[x+3] = (swall[x+4]+swall[x+2])>>1;
x += 4;
}
if (x+2 <= xb2[z])
@ -3016,8 +3025,8 @@ static void prepwall(int32_t z, walltype *wal)
l *= walxrepeat;
lwall[x+2] = (l>>18);
}
lwall[x+1] = ((l+ol)>>19);
swall[x+1] = ((swall[x]+swall[x+2])>>1);
lwall[x+1] = (l+ol)>>19;
swall[x+1] = (swall[x]+swall[x+2])>>1;
x += 2;
}
if (x+1 <= xb2[z])
@ -3031,12 +3040,16 @@ static void prepwall(int32_t z, walltype *wal)
}
}
if (lwall[xb1[z]] < 0) lwall[xb1[z]] = 0;
if ((lwall[xb2[z]] >= walxrepeat) && (walxrepeat)) lwall[xb2[z]] = walxrepeat-1;
if (lwall[xb1[z]] < 0)
lwall[xb1[z]] = 0;
if (lwall[xb2[z]] >= walxrepeat && walxrepeat)
lwall[xb2[z]] = walxrepeat-1;
if (wal->cstat&8)
{
walxrepeat--;
for (x=xb1[z]; x<=xb2[z]; x++) lwall[x] = walxrepeat-lwall[x];
for (x=xb1[z]; x<=xb2[z]; x++)
lwall[x] = walxrepeat-lwall[x];
}
}
@ -3618,7 +3631,9 @@ static void florscan(int32_t x1, int32_t x2, int32_t sectnum)
//
// wallscan (internal)
//
static void wallscan(int32_t x1, int32_t x2, int16_t *uwal, int16_t *dwal, int32_t *swal, int32_t *lwal)
static void wallscan(int32_t x1, int32_t x2,
const int16_t *uwal, const int16_t *dwal,
const int32_t *swal, const int32_t *lwal)
{
int32_t x, xnice, ynice;
intptr_t fpalookup;
@ -4234,7 +4249,7 @@ static void grouscan(int32_t dax1, int32_t dax2, int32_t sectnum, char dastat)
globvis = mulscale16(globvis,xdimscale);
j = FP_OFF(palookup[globalpal]);
setupslopevlin_alsotrans(((int32_t)(picsiz[globalpicnum]&15))+(((int32_t)(picsiz[globalpicnum]>>4))<<8),
setupslopevlin_alsotrans((picsiz[globalpicnum]&15) + ((picsiz[globalpicnum]>>4)<<8),
waloff[globalpicnum],-ylookup[1]);
l = (globalzd>>16);
@ -4254,16 +4269,16 @@ static void grouscan(int32_t dax1, int32_t dax2, int32_t sectnum, char dastat)
else { y1 = max(umost[x],dplc[x]); y2 = dmost[x]-1; }
if (y1 <= y2)
{
nptr1 = (intptr_t *)&slopalookup[y1+(shoffs>>15)];
nptr2 = (intptr_t *)&slopalookup[y2+(shoffs>>15)];
nptr1 = &slopalookup[y1+(shoffs>>15)];
nptr2 = &slopalookup[y2+(shoffs>>15)];
while (nptr1 <= mptr1)
{
*mptr1-- = j + (getpalookup((int32_t)mulscale24(krecipasm(m1),globvis),globalshade)<<8);
*mptr1-- = j + (getpalookup(mulscale24(krecipasm(m1),globvis),globalshade)<<8);
m1 -= l;
}
while (nptr2 >= mptr2)
{
*mptr2++ = j + (getpalookup((int32_t)mulscale24(krecipasm(m2),globvis),globalshade)<<8);
*mptr2++ = j + (getpalookup(mulscale24(krecipasm(m2),globvis),globalshade)<<8);
m2 += l;
}
@ -4330,7 +4345,7 @@ static void parascan(int32_t dax1, int32_t dax2, int32_t sectnum, char dastat, i
botptr = dmost;
}
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
if ((unsigned)globalpicnum >= MAXTILES) globalpicnum = 0;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum,(int16_t)sectnum);
globalshiftval = (picsiz[globalpicnum]>>4);
if (pow2long[globalshiftval] != tilesizy[globalpicnum]) globalshiftval++;
@ -4387,18 +4402,18 @@ static void parascan(int32_t dax1, int32_t dax2, int32_t sectnum, char dastat, i
{
n = mulscale16(xdimenrecip,viewingrange);
for (j=xb1[z]; j<=xb2[z]; j++)
lplc[j] = (((mulscale23(j-halfxdimen,n)+globalang)&2047)>>k);
lplc[j] = ((mulscale23(j-halfxdimen,n)+globalang)&2047)>>k;
}
else
{
for (j=xb1[z]; j<=xb2[z]; j++)
lplc[j] = ((((int32_t)radarang2[j]+globalang)&2047)>>k);
lplc[j] = ((radarang2[j]+globalang)&2047)>>k;
}
if (parallaxtype == 2)
{
n = mulscale16(xdimscale,viewingrange);
for (j=xb1[z]; j<=xb2[z]; j++)
swplc[j] = mulscale14(sintable[((int32_t)radarang2[j]+512)&2047],n);
swplc[j] = mulscale14(sintable[(radarang2[j]+512)&2047],n);
}
else
clearbuf(&swplc[xb1[z]],xb2[z]-xb1[z]+1,mulscale16(xdimscale,viewingrange));
@ -4469,7 +4484,7 @@ static void setup_globals_wall1(const walltype *wal, int32_t dapicnum)
globalorientation = wal->cstat;
globalpicnum = dapicnum;
if ((unsigned)globalpicnum >= (unsigned)MAXTILES) globalpicnum = 0;
if ((unsigned)globalpicnum >= MAXTILES) globalpicnum = 0;
if (picanm[globalpicnum]&192) globalpicnum += animateoffs(globalpicnum, 0);
globalxpanning = wal->xpanning;
@ -4706,6 +4721,7 @@ static void drawalls(int32_t bunch)
else
{
wallmost(dwall,z,nextsectnum,(uint8_t)0);
if ((cz[2] > fz[0]) || (cz[3] > fz[1]))
for (i=x1; i<=x2; i++) if (dwall[i] > dplc[i]) dwall[i] = dplc[i];
@ -4799,6 +4815,7 @@ static void drawalls(int32_t bunch)
else
{
wallmost(uwall,z,nextsectnum,(uint8_t)1);
if ((fz[2] < cz[0]) || (fz[3] < cz[1]))
for (i=x1; i<=x2; i++) if (uwall[i] < uplc[i]) uwall[i] = uplc[i];