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- Use 64-bit coordinates for a few spots in the FPathTraverse constructor and P_SightPathTraverse().

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- Allow FTraceInfo::TrlaceTraverse to pass the endpoints to FPathTraverse as deltas instead of
  as absolute coordinates.

SVN r3487 (trunk)
This commit is contained in:
Randy Heit 2012-03-28 04:20:23 +00:00
parent cfd5b84535
commit b2abe9d11e
4 changed files with 54 additions and 25 deletions
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1
src/p_local.h
View file

@ -347,6 +347,7 @@ public:
#define PT_ADDLINES 1
#define PT_ADDTHINGS 2
#define PT_COMPATIBLE 4
#define PT_DELTA 8 // x2,y2 is passed as a delta, not as an endpoint
AActor *P_BlockmapSearch (AActor *mo, int distance, AActor *(*check)(AActor*, int, void *), void *params = NULL);
AActor *P_RoughMonsterSearch (AActor *mo, int distance);

51
src/p_maputl.cpp
View file

@ -1165,10 +1165,9 @@ intercept_t *FPathTraverse::Next()
FPathTraverse::FPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2, int flags)
{
fixed_t xt1;
fixed_t yt1;
fixed_t xt2;
fixed_t yt2;
fixed_t xt1, xt2;
fixed_t yt1, yt2;
long long _x1, _x2, _y1, _y2;
fixed_t xstep;
fixed_t ystep;
@ -1197,18 +1196,42 @@ FPathTraverse::FPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2, in
trace.x = x1;
trace.y = y1;
trace.dx = x2 - x1;
trace.dy = y2 - y1;
if (flags & PT_DELTA)
{
trace.dx = x2;
trace.dy = y2;
}
else
{
trace.dx = x2 - x1;
trace.dy = y2 - y1;
}
_x1 = (long long)x1 - bmaporgx;
_y1 = (long long)y1 - bmaporgy;
x1 -= bmaporgx;
y1 -= bmaporgy;
xt1 = GetSafeBlockX(x1);
yt1 = GetSafeBlockY(y1);
xt1 = int(_x1 >> MAPBLOCKSHIFT);
yt1 = int(_y1 >> MAPBLOCKSHIFT);
x2 -= bmaporgx;
y2 -= bmaporgy;
xt2 = GetSafeBlockX(x2);
yt2 = GetSafeBlockY(y2);
if (flags & PT_DELTA)
{
_x2 = _x1 + x2;
_y2 = _y1 + y2;
xt2 = int(_x2 >> MAPBLOCKSHIFT);
yt2 = int(_y2 >> MAPBLOCKSHIFT);
x2 = (int)_x2;
y2 = (int)_y2;
}
else
{
_x2 = (long long)x2 - bmaporgx;
_y2 = (long long)y2 - bmaporgy;
x2 -= bmaporgx;
y2 -= bmaporgy;
xt2 = int(_x2 >> MAPBLOCKSHIFT);
yt2 = int(_y2 >> MAPBLOCKSHIFT);
}
if (xt2 > xt1)
{
@ -1228,7 +1251,7 @@ FPathTraverse::FPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2, in
partialx = FRACUNIT;
ystep = 256*FRACUNIT;
}
yintercept = (y1>>MAPBTOFRAC) + FixedMul (partialx, ystep);
yintercept = int(_y1>>MAPBTOFRAC) + FixedMul (partialx, ystep);
if (yt2 > yt1)
@ -1249,7 +1272,7 @@ FPathTraverse::FPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2, in
partialy = FRACUNIT;
xstep = 256*FRACUNIT;
}
xintercept = (x1>>MAPBTOFRAC) + FixedMul (partialy, xstep);
xintercept = int(_x1>>MAPBTOFRAC) + FixedMul (partialy, xstep);
// [RH] Fix for traces that pass only through blockmap corners. In that case,
// xintercept and yintercept can both be set ahead of mapx and mapy, so the

17
src/p_sight.cpp
View file

@ -443,6 +443,7 @@ bool SightCheck::P_SightTraverseIntercepts ()
bool SightCheck::P_SightPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_t y2)
{
fixed_t xt1,yt1,xt2,yt2;
long long _x1,_y1,_x2,_y2;
fixed_t xstep,ystep;
fixed_t partialx, partialy;
fixed_t xintercept, yintercept;
@ -482,15 +483,19 @@ bool SightCheck::P_SightPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_
trace.dx = x2 - x1;
trace.dy = y2 - y1;
_x1 = (long long)x1 - bmaporgx;
_y1 = (long long)y1 - bmaporgy;
x1 -= bmaporgx;
y1 -= bmaporgy;
xt1 = GetSafeBlockX(x1);
yt1 = GetSafeBlockY(y1);
xt1 = int(_x1 >> MAPBLOCKSHIFT);
yt1 = int(_y1 >> MAPBLOCKSHIFT);
_x2 = (long long)x2 - bmaporgx;
_y2 = (long long)y2 - bmaporgy;
x2 -= bmaporgx;
y2 -= bmaporgy;
xt2 = GetSafeBlockX(x2);
yt2 = GetSafeBlockY(y2);
xt2 = int(_x2 >> MAPBLOCKSHIFT);
yt2 = int(_y2 >> MAPBLOCKSHIFT);
// points should never be out of bounds, but check once instead of
// each block
@ -516,7 +521,7 @@ bool SightCheck::P_SightPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_
partialx = FRACUNIT;
ystep = 256*FRACUNIT;
}
yintercept = (y1>>MAPBTOFRAC) + FixedMul (partialx, ystep);
yintercept = int(_y1>>MAPBTOFRAC) + FixedMul (partialx, ystep);
if (yt2 > yt1)
@ -537,7 +542,7 @@ bool SightCheck::P_SightPathTraverse (fixed_t x1, fixed_t y1, fixed_t x2, fixed_
partialy = FRACUNIT;
xstep = 256*FRACUNIT;
}
xintercept = (x1>>MAPBTOFRAC) + FixedMul (partialy, xstep);
xintercept = int(_x1>>MAPBTOFRAC) + FixedMul (partialy, xstep);
// [RH] Fix for traces that pass only through blockmap corners. In that case,
// xintercept and yintercept can both be set ahead of mapx and mapy, so the

10
src/p_trace.cpp
View file

@ -175,19 +175,19 @@ bool Trace (fixed_t x, fixed_t y, fixed_t z, sector_t *sector,
#endif
// check for overflows and clip if necessary
SQWORD xd= (SQWORD)x + ( ( SQWORD(vx) * SQWORD(maxDist) )>>16);
SQWORD xd = (SQWORD)x + ( ( SQWORD(vx) * SQWORD(maxDist) )>>16);
if (xd>SQWORD(32767)*FRACUNIT)
{
maxDist = inf.MaxDist=FixedDiv(FIXED_MAX-x,vx);
maxDist = inf.MaxDist = FixedDiv(FIXED_MAX - x, vx);
}
else if (xd<-SQWORD(32767)*FRACUNIT)
{
maxDist = inf.MaxDist=FixedDiv(FIXED_MIN-x,vx);
maxDist = inf.MaxDist = FixedDiv(FIXED_MIN - x, vx);
}
SQWORD yd= (SQWORD)y + ( ( SQWORD(vy) * SQWORD(maxDist) )>>16);
SQWORD yd = (SQWORD)y + ( ( SQWORD(vy) * SQWORD(maxDist) )>>16);
if (yd>SQWORD(32767)*FRACUNIT)
{
@ -246,7 +246,7 @@ bool Trace (fixed_t x, fixed_t y, fixed_t z, sector_t *sector,
bool FTraceInfo::TraceTraverse (int ptflags)
{
FPathTraverse it(StartX, StartY, StartX + FixedMul (Vx, MaxDist), StartY + FixedMul (Vy, MaxDist), ptflags);
FPathTraverse it(StartX, StartY, FixedMul (Vx, MaxDist), FixedMul (Vy, MaxDist), ptflags | PT_DELTA);
intercept_t *in;
while ((in = it.Next()))