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Trying to get better doom clipping - still doesn't work right.

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git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@162 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2004-09-07 18:23:54 +00:00
parent 3577d534b6
commit 011366be8e
1 changed files with 111 additions and 30 deletions
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141
engine/gl/glmod_doom.c
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@ -1636,18 +1636,15 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
int bmi, obmi;
vec3_t delta;
int sec1 = Doom_SectorNearPoint(start);
vec3_t p1, pointonplane;
float d1, d2, c1, c2;
vec3_t p1, pointonplane, ofs;
float d1, d2, c1, c2, planedist;
plane_t *lp;
mdoomvertex_t *v1, *v2;
int j;
float clipfrac;
#define DIST_EPSILON (0.03125)
float cylinder = 0;//hull->clip_maxs[0]; //FIXME: //lines and gravity cause major problems. the player is only ever in one sector at a time but should be in multiple.
// hull->clip_mins[2]=0;
// hull->clip_maxs[2]=0;
// Con_Printf("%i\n", sec1);
if (start[2] < sectorm[sec1].floorheight-hull->clip_mins[2]) //whoops, started outside... ?
@ -1656,7 +1653,7 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
trace->allsolid = trace->startsolid = true;
trace->endpos[0] = start[0];
trace->endpos[1] = start[1];
trace->endpos[2] = start[2];
trace->endpos[2] = start[2]; //yeah, we do mean this - startsolid
// if (IS_NAN(trace->endpos[2]))
// Con_Printf("Nanny\n");
trace->plane.normal[0] = 0;
@ -1684,7 +1681,7 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
obmi = -1;
VectorSubtract(p2, p1, delta);
p2f = Length(delta)+DIST_EPSILON;
if (IS_NAN(p2f))
if (IS_NAN(p2f) || p2f > 100000)
p2f = 100000;
VectorNormalize(delta);
@ -1717,36 +1714,119 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
}
lp = lineplanes + *linedefs;
d1 = DotProduct(lp->normal, start) - (lp->dist);
d2 = DotProduct(lp->normal, p2) - (lp->dist);
if (d1 >= cylinder && d2 >= cylinder)
if (1)
{ //figure out how far to move the plane out by
for (j=0 ; j<2 ; j++)
{
if (lp->normal[j] < 0)
ofs[j] = hull->clip_maxs[j];
else
ofs[j] = hull->clip_mins[j];
}
ofs[2] = 0;
planedist = lp->dist - DotProduct (ofs, lp->normal);
}
else
planedist = lp->dist;
d1 = DotProduct(lp->normal, start) - (planedist);
d2 = DotProduct(lp->normal, p2) - (planedist);
if (d1 > 0 && d2 > 0)
continue; //both points on the front side.
if (d1 <= cylinder && d2 <= cylinder)
continue; //both points on the reverse side.
if (d1 < 0) //start on back side
{
if (ld->sidedef[1] != 0xffff) //two sided (optimisation)
{
planedist = -planedist+lp->dist;
if (/*d1 < planedist*-1 &&*/ d1 > planedist*2)
{ //right, we managed to end up just on the other side of a wall's plane.
v1 = &vertexesl[ld->vert[0]];
v2 = &vertexesl[ld->vert[1]];
if (!(d1 - d2))
continue;
if (d1<0) //back to front.
c1 = (d1+DIST_EPSILON) / (d1 - d2);
else
c1 = (d1-DIST_EPSILON) / (d1 - d2);
c2 = 1-c1;
pointonplane[0] = start[0]*c2 + p2[0]*c1;
/* if (pointonplane[0] > v1->xpos+DIST_EPSILON*2+hull->clip_maxs[0] && pointonplane[0] > v2->xpos+DIST_EPSILON*2+hull->clip_maxs[0])
continue;
if (pointonplane[0] < v1->xpos-DIST_EPSILON*2+hull->clip_mins[0] && pointonplane[0] < v2->xpos-DIST_EPSILON*2+hull->clip_mins[0])
continue;
*/ pointonplane[1] = start[1]*c2 + p2[1]*c1;
/* if (pointonplane[1] > v1->ypos+DIST_EPSILON*2+hull->clip_maxs[1] && pointonplane[1] > v2->ypos+DIST_EPSILON*2+hull->clip_maxs[1])
continue;
if (pointonplane[1] < v1->ypos-DIST_EPSILON*2+hull->clip_mins[1] && pointonplane[1] < v2->ypos-DIST_EPSILON*2+hull->clip_mins[1])
continue;
*/
pointonplane[2] = start[2]*c2 + p2[2]*c1;
Con_Printf("Started in wall\n");
j = sidedefsm[ld->sidedef[d1 < planedist]].sector;
//yup, we are in the thing
//prevent ourselves from entering the back-sector's floor/ceiling
if (pointonplane[2] < sectorm[j].floorheight-hull->clip_mins[2]) //whoops, started outside... ?
{
Con_Printf("Started in floor\n");
trace->allsolid = trace->startsolid = false;
trace->endpos[2] = sectorm[j].floorheight-hull->clip_mins[2];
trace->fraction = fabs(trace->endpos[2] - start[2]) / fabs(p2[2] - start[2]);
trace->endpos[0] = start[0]+delta[0]*trace->fraction*p2f;
trace->endpos[1] = start[1]+delta[1]*trace->fraction*p2f;
// if (IS_NAN(trace->endpos[2]))
// Con_Printf("Nanny\n");
trace->plane.normal[0] = 0;
trace->plane.normal[1] = 0;
trace->plane.normal[2] = 1;
trace->plane.dist = sectorm[j].floorheight-hull->clip_mins[2];
continue;
}
if (pointonplane[2] > sectorm[j].ceilingheight-hull->clip_maxs[2]) //whoops, started outside... ?
{
Con_Printf("Started in ceiling\n");
trace->allsolid = trace->startsolid = false;
trace->endpos[0] = pointonplane[0];
trace->endpos[1] = pointonplane[1];
trace->endpos[2] = sectorm[j].ceilingheight-hull->clip_maxs[2];
trace->fraction = fabs(trace->endpos[2] - start[2]) / fabs(p2[2] - start[2]);
trace->plane.normal[0] = 0;
trace->plane.normal[1] = 0;
trace->plane.normal[2] = -1;
trace->plane.dist = -(sectorm[j].ceilingheight-hull->clip_maxs[2]);
continue;
}
}
}
if (d2 < 0)
continue; //both points on the reverse side.
}
//line crosses plane.
v1 = &vertexesl[ld->vert[0]];
v2 = &vertexesl[ld->vert[1]];
if (d1<cylinder) //back to front.
if (d1<0) //back to front.
{
if (ld->sidedef[1] == 0xffff)
continue; //allow them to pass
continue; //hack to allow them to pass
c1 = (d1+DIST_EPSILON) / (d1 - d2);
}
else
c1 = (d1-DIST_EPSILON) / (d1 - d2);
c2 = 1-c1;
pointonplane[0] = start[0]*c2 + p2[0]*c1;
if (pointonplane[0] > v1->xpos+DIST_EPSILON*2+cylinder && pointonplane[0] > v2->xpos+DIST_EPSILON*2+cylinder)
if (pointonplane[0] > v1->xpos+DIST_EPSILON*2+hull->clip_maxs[0] && pointonplane[0] > v2->xpos+DIST_EPSILON*2+hull->clip_maxs[0])
continue;
if (pointonplane[0] < v1->xpos-DIST_EPSILON*2-cylinder && pointonplane[0] < v2->xpos-DIST_EPSILON*2-cylinder)
if (pointonplane[0] < v1->xpos-DIST_EPSILON*2+hull->clip_mins[0] && pointonplane[0] < v2->xpos-DIST_EPSILON*2+hull->clip_mins[0])
continue;
pointonplane[1] = start[1]*c2 + p2[1]*c1;
if (pointonplane[1] > v1->ypos+DIST_EPSILON*2+cylinder && pointonplane[1] > v2->ypos+DIST_EPSILON*2+cylinder)
if (pointonplane[1] > v1->ypos+DIST_EPSILON*2+hull->clip_maxs[1] && pointonplane[1] > v2->ypos+DIST_EPSILON*2+hull->clip_maxs[1])
continue;
if (pointonplane[1] < v1->ypos-DIST_EPSILON*2-cylinder && pointonplane[1] < v2->ypos-DIST_EPSILON*2-cylinder)
if (pointonplane[1] < v1->ypos-DIST_EPSILON*2+hull->clip_mins[1] && pointonplane[1] < v2->ypos-DIST_EPSILON*2+hull->clip_mins[1])
continue;
pointonplane[2] = start[2]*c2 + p2[2]*c1;
@ -1754,10 +1834,10 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
{ //unconditionally clipped.
}
else
{ //ensure that the side we are passing on to passes the clip
{ //ensure that the side we are passing on to passes the clip (no ceiling/floor clips happened first)
msector_t *sec2;
if (d1<cylinder)
if (d1<0)
sec2 = &sectorm[sidedefsm[ld->sidedef[1]].sector];
else
sec2 = &sectorm[sidedefsm[ld->sidedef[0]].sector];
@ -1812,7 +1892,7 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
continue;
}
if (d1<cylinder)
if (d1<0)
sec2 = &sectorm[sidedefsm[ld->sidedef[0]].sector];
else
sec2 = &sectorm[sidedefsm[ld->sidedef[1]].sector];
@ -1823,7 +1903,7 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
if (pointonplane[2] > sec2->floorheight-hull->clip_mins[2] &&
pointonplane[2] < sec2->ceilingheight-hull->clip_maxs[2])
{
// Con_Printf("Two sided passed\n");
Con_Printf("Two sided passed\n");
continue;
}
@ -1831,10 +1911,10 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
// sec2->floorheight--;
}
if (d1<cylinder) //back to front.
c1 = (d1-cylinder+DIST_EPSILON) / (d1 - d2);
if (d1<0) //back to front.
c1 = (d1+DIST_EPSILON) / (d1 - d2);
else
c1 = (d1-cylinder-DIST_EPSILON) / (d1 - d2);
c1 = (d1-DIST_EPSILON) / (d1 - d2);
clipfrac = c1;
@ -1847,16 +1927,17 @@ qboolean Doom_RecursiveHullCheck (hull_t *hull, int num, float p1f, float p2f, v
if (trace->fraction > clipfrac)
{
trace->fraction = clipfrac;
VectorMA(pointonplane, cylinder, lp->normal, trace->endpos);
VectorMA(pointonplane, 0, lp->normal, trace->endpos);
VectorMA(trace->endpos, -0.1, delta, trace->endpos);
// if (IS_NAN(trace->endpos[2]))
// Con_Printf("Buggy clipping\n");
VectorCopy(lp->normal, trace->plane.normal);
trace->plane.dist = lp->dist-cylinder;
trace->plane.dist = planedist;
// if (IS_NAN(trace->plane.normal[2]))
// Con_Printf("Buggy clipping\n");
// if (clipfrac)
// Con_Printf("Clip Wall %f\n", clipfrac);
if (clipfrac)
Con_Printf("Clip Wall %f\n", clipfrac);
}
}