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LUT for slope recip calculations in classic. DONT_BUILD.

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git-svn-id: https://svn.eduke32.com/eduke32@4714 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2014-11-02 05:35:06 +00:00
parent 999f789438
commit e677923165
2 changed files with 7 additions and 2 deletions
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3
polymer/eduke32/build/src/a-c.c
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@ -96,6 +96,7 @@ void hlineasm4(int32_t cnt, int32_t skiploadincs, int32_t paloffs, uint32_t by,
///// Sloped ceiling/floor vertical line functions /////
extern int32_t sloptable[16384];
void slopevlin(intptr_t p, int32_t i, intptr_t slopaloffs, int32_t cnt, int32_t bx, int32_t by)
{
@ -107,7 +108,7 @@ void slopevlin(intptr_t p, int32_t i, intptr_t slopaloffs, int32_t cnt, int32_t
slopalptr = (intptr_t *)slopaloffs;
for (; cnt>0; cnt--)
{
i = krecipasm(bz>>6); bz += bzinc;
i = (sloptable[(bz>>6)+8192]); bz += bzinc;
u = bx+(inthi_t)globalx3*i;
v = by+(inthi_t)globaly3*i;
(*(char *)p) = *(char *)(((intptr_t)slopalptr[0])+gbuf[((u>>(32-glogx))<<glogy)+(v>>(32-glogy))]);

6
polymer/eduke32/build/src/engine.c
View file

@ -187,6 +187,7 @@ int32_t globalx1, globaly2, globalx3, globaly3;
};
#endif
int32_t sloptable[16384];
static intptr_t slopalookup[16384]; // was 2048
#if defined(USE_OPENGL)
palette_t palookupfog[MAXPALOOKUPS];
@ -4239,7 +4240,7 @@ static void tslopevlin(uint8_t *p, int32_t i, const intptr_t *slopalptr, int32_t
uint8_t ch;
uint32_t u, v;
i = krecipasm(bz>>6); bz += bzinc;
i = (sloptable[(bz>>6)+8192]); bz += bzinc;
u = bx + xtou*i;
v = by + ytov*i;
ch = *(uint8_t *)(slopalptr[0] + buf[((u>>(32-logx))<<logy)+(v>>(32-logy))]);
@ -8009,6 +8010,9 @@ static int32_t loadtables(void)
for (i=0; i<2048; i++)
reciptable[i] = divscale30(2048, i+2048);
for (i=0; i<16384; i++)
sloptable[i] = krecipasm(i-8192);
for (i=0; i<=512; i++)
sintable[i] = (int16_t)(16384.f * sinf((float)i * BANG2RAD));
for (i=513; i<1024; i++)