specific traceline?

blubswillrule · Post by **blubswillrule** » Sun Feb 20, 2011 8:43 am

I know there is a way to check if there is anything between two entities using tracelines,

but what if I wanted it to only check for a certain type of entity?
(like, a certain classname, or one that has certain flags)

I need to check if there is a door between 2 entities basically, it mustn't check for walls, only door, could there be ANY way to do this?

thanks

Post by **Error** » Sun Feb 20, 2011 9:42 am

...do a traceline from one entity to the other... yes... do exactly that?

blubswillrule · Post by **blubswillrule** » Sun Feb 20, 2011 9:56 am

but the thing is, I don't want it to check for walls, only for certain entities

GiffE · Post by **GiffE** » Sun Feb 20, 2011 5:30 pm

I don't fully understand your question but I'll give a shot at my two different interpretations of the question.

If you just want to check if there is a door entity between you just fire a trace and do a trace_ent.classname == "func_door" to check if its a door entity.

If you want to have the trace go through something:

1.) Trace from first entity forward (or where ever)
2.) if(trace_fraction < 1.0) // you hit something
3.) if(trace_ent.classname == "func_door") // check if its a door entity but could be anything
4.) Since we hit a door and we want it to go through... start a second trace starting from trace_endpos and continuing forward. Set the ignore entity to trace_ent. I'm pretty sure if it starts in a solid it ignores it until it comes outside too.

Ranger366 · Post by **Ranger366** » Mon Feb 21, 2011 7:15 am

A good example for that is on QuakeSrc.org i think.

http://www.quake-1.com/docs/quakesrc.org/49.html

Jukki · Post by **Jukki** » Tue Feb 22, 2011 4:58 am

Blubs means he wants to know if there is a traceline that can go trought walls

DusterdooSmock · Post by **DusterdooSmock** » Tue Feb 22, 2011 5:27 am

Jukki wrote:Blubs means he wants to know if there is a traceline that can go trought walls

He wants one that goes through walls, from one entity to another..

blubswillrule · Post by **blubswillrule** » Tue Feb 22, 2011 5:54 am

yes, one that goes through walls, BUT checks if it hits a door.

it would be nice to have, but not terribly important for the time being.

GiffE · Post by **GiffE** » Tue Feb 22, 2011 8:42 pm

blubswillrule wrote:yes, one that goes through walls, BUT checks if it hits a door.

it would be nice to have, but not terribly important for the time being.

Yea to go through walls or the map bsp you'd have to use a series of traces (while loop'd or recursive) stop when you've either hit a door or you reached your destination.