This won’t explain how or why elevators work. This will only show you what was changed in order to prevent them in Modern Warfare 2. While trying to disable elevators in CoD4, I noticed that if I overjump a call to PM_CorrectAllSolid or PM_JitterPoint in later CoD’s, elevators will stop working. I couldn’t find anything special in that function and decided to compare it to the one in MW2 … and well, Spot On!
PM_CorrectAllSolid - CoD4
bool PM_CorrectAllSolid(pmove_t *pm, pml_t *pml, trace_t *trace)
{
/*Simplyfied Pseudocode*/
while ( 1 )
{
point[0] = ps->origin[0] + (float)CorrectSolidDeltas[i][0];
point[1] = ps->origin[1] + (float)CorrectSolidDeltas[i][1];
point[2] = ps->origin[2] + (float)CorrectSolidDeltas[i][2];
PM_playerTrace(pm, trace, ps->origin, pm->mins, pm->maxs, point, ps->clientNum, pm->tracemask)
if ( !trace->startsolid )
break;
i += 12;
if ( i >= 312 )
{
ps->pm_flags &= 0xFFFFBFFF;
ps->jumpOriginZ = 0.0f;
GroundEntityNum = 1023;
pml->groundPlane = 0;
pml->almostGroundPlane = 0;
pml->walking = 0;
return 0;
}
}
PM_playerTrace(pm, trace, ps->origin, pm->mins, pm->maxs, point, ps->clientNum, pm->tracemask)
return true;
}PM_CorrectAllSolid - MW2
bool PM_CorrectAllSolid(pmove_t *pm, pml_t *pml, trace_t *trace)
{
/*Simplyfied Pseudocode*/
while ( 1 )
{
point[0] = ps->origin[0] + (float)CorrectSolidDeltas[i][0];
point[1] = ps->origin[1] + (float)CorrectSolidDeltas[i][1];
point[2] = ps->origin[2] + (float)CorrectSolidDeltas[i][2];
PM_playerTrace(pm, trace, ps->origin, pm->mins, pm->maxs, point, ps->clientNum, pm->tracemask)
if ( !trace->startsolid )
{
/*some offsets on point*/
PM_playerTrace(pm, trace, ps->origin, pm->mins, pm->maxs, point, ps->clientNum, pm->tracemask)
if ( !trace->startsolid )
break;
}
i += 12;
if ( i >= 312 )
{
ps->pm_flags &= 0xFFFFBFFF;
ps->jumpOriginZ = 0.0f;
GroundEntityNum = 1023;
pml->groundPlane = 0;
pml->almostGroundPlane = 0;
pml->walking = 0;
return 0;
}
}
return true;
}