easy way to find the normal vector of the ladder

[Whistler]

g_engfuncs.pfnTraceModel(m_vecWptOrigin, VecBModelOrigin(pLadder), point_hull, pLadder, &tr);

if (tr.flFraction < 1.0)
   // tr.vecPlaneNormal is the normal vector of the ladder now

m_vecWptOrigin is the origin of the waypoint, which is always "outside" the ladder.

pfnTraceModel() means a tracehull which is only blocked by the specified entity ("pLadder").

[Pierre-Marie Baty]

This is interesting indeed, although I never had problems determining the normal vector of a ladder using a normal TraceLine as far as I remember ???

[Whistler]

if you are using a normal traceline, it's usually not the ladder but the wall behind the ladder that blocks the traceline. and sometimes you will have trouble with this in ladders which don't have a wall behind it (like that one in cs_assault).

[sPlOrYgOn]

but if you have it like that it'll only hit the ladder and what if it hits the ladder from the wrong side?

[Whistler]

the start position is the waypoint origin, which is always at the right side unless the waypointer is bad one

[sPlOrYgOn]

well if that were true then there isn't any problem using traceline even if it hit the thing in the back..

[Cheeseh]

wouldn't a tracehull find the ladder?

[Whistler]

Originally Posted by Cheeseh

wouldn't a tracehull find the ladder?

Yes, I'm sure ordinary tracehull with "head_hull" will find the ladder. but the "point_hull" won't find it.

[Pierre-Marie Baty]

umm yes, my bad.. TraceHull, that's what I meant in my post