zdoom
/
raze-gles
mirror of https://github.com/ZDoom/raze-gles.git
0
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

clipmove() improvements 

This reverts some of the previous clipmove() changes in favor of implementing explicit rejection of movement in cases where clipping has somehow failed.

git-svn-id: https://svn.eduke32.com/eduke32@7457 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2019-03-30 19:35:54 +00:00 committed by Christoph Oelckers
parent decce5bc70
commit ddd1d34973
1 changed files with 39 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
source/build/src/clip.cpp
View File

@ -855,7 +855,7 @@ static inline void keepaway(int32_t *x, int32_t *y, int32_t w)
const int32_t ox = ksgn(-dy), oy = ksgn(dx);
char first = (klabs(dx) <= klabs(dy));
while (1)
do
{
if (dx*(*y-y1) > (*x-x1)*dy)
return;
@ -867,6 +867,7 @@ static inline void keepaway(int32_t *x, int32_t *y, int32_t w)
first ^= 1;
}
while (1);
}
static int32_t get_floorspr_clipyou(int32_t x1, int32_t x2, int32_t x3, int32_t x4,
@ -898,6 +899,23 @@ static int32_t get_floorspr_clipyou(int32_t x1, int32_t x2, int32_t x3, int32_t
return clipyou;
}
static int sectoradjacent(int const sect1, int const sect2)
{
if (sector[sect1].wallnum < sector[sect2].wallnum)
{
for (int i = 0; i < sector[sect1].wallnum; i++)
if (wall[sector[sect1].wallptr+i].nextsector == sect2)
return 1;
}
else
{
for (int i = 0; i < sector[sect2].wallnum; i++)
if (wall[sector[sect2].wallptr+i].nextsector == sect1)
return 1;
}
return 0;
}
//
// clipmove
//
@ -1066,7 +1084,9 @@ int32_t clipmove(vec3_t *pos, int16_t *sectnum,
}
}
if (clipyou)
// We're not interested in any sector reached by portal traversal that we're "inside" of.
if (clipsectcnt != 1 && inside(pos->x, pos->y, dasect) == 1) break;
else if (clipyou)
{
int16_t objtype;
int32_t bsz;
@ -1088,12 +1108,9 @@ int32_t clipmove(vec3_t *pos, int16_t *sectnum,
day = walldist; if (dx < 0) day = -day;
addclipline(x1+dax, y1+day, x2+dax, y2+day, objtype);
}
if (wal->nextsector>=0)
else if (wal->nextsector>=0)
{
// This fixes Duke3D E1L2.
// We're not interested in any sector reached by portal traversal that we're "inside" of.
if (inside(pos->x, pos->y, wal->nextsector)) break;
if (inside(pos->x, pos->y, wal->nextsector) == 1) continue;
for (i=clipsectnum-1; i>=0; i--)
if (wal->nextsector == clipsectorlist[i]) break;
@ -1279,11 +1296,22 @@ int32_t clipmove(vec3_t *pos, int16_t *sectnum,
retval = (uint16_t) clipobjectval[hitwall];
hitwalls[cnt] = hitwall;
}
cnt--;
pos->x = intx;
pos->y = inty;
updatesectorz(pos->x, pos->y, pos->z, sectnum);
// this handles rejection of movement that managed to get past the clipping lines when it shouldn't have
int const osectnum = *sectnum;
updatesectorz(intx, inty, pos->z, sectnum);
if (*sectnum == osectnum ||
(!check_floor_curb(osectnum, *sectnum, flordist, pos->z, pos->x, pos->y) &&
(sectoradjacent(osectnum, *sectnum) || cansee(pos->x, pos->y, pos->z, osectnum, intx, inty, pos->z, *sectnum))))
{
pos->x = intx;
pos->y = inty;
cnt--;
}
else
*sectnum = osectnum;
} while ((xvect|yvect) != 0 && hitwall >= 0 && cnt > 0);
// I'm not a fan of these brute-force searches but this one should be OK