Quote from TeamSpen210 on August 28, 2014, 1:24 am

There are combine energy balls (from Half-life), and Portal Energy Pellets. The entity is a prop_energy_ball, just look at any pellet catcher instances since they use a trigger to detect the pellet. You can send three inputs to them: Kill (instantly vanishes), Explode (which makes a camera shake effect + shockwave) and BallCaught (similar to Kill, but disables the point_energy_ball launcher that fired it and also triggers the OnBallCaught output on that launcher).

Quote from CamBen on August 28, 2014, 2:51 am

If you're referring to the balltype keyvalue, I believe it's not functional in portal.

Quote from TeamSpen210 on August 28, 2014, 4:06 am

Also, if you want to kill them after a certaint time or something use a logic_register_activator to remember the entity so you can trigger it later. Put a trigger_multiple right in front of the launcher, and use that to register the pellet. (Enable OnPostSpawn, disable OnStartTouch).

Quote from FelixGriffin on August 28, 2014, 10:34 am

The classname you need to filter is prop_combine_ball or prop_energy_ball depending on the entity you used for the launcher. The easiest way to filter for them, though, is to use a filter_combine_ball_type (with the type set to Launched from Point_combine_ball_launcher), which will detect both.

Also, if you want to kill them in a more interesting way, use the input Explode.

Quote from CJLERCH on August 28, 2014, 12:07 pm

All good suggestions! Thanks!

For anyone that may have been wondering, I'm trying to implement a function into either FR's matter inquisition field, or Ultiman's energy dissipation/distabilization field (or both) that makes the combine balls explode on impact. I've not seen it done before, and it could potentially lead to some interesting puzzles

Quote from FelixGriffin on August 28, 2014, 6:42 pm

If it helps, I implemented Mevious's Rexaura positron orbs in Portal 2 using a trigger_multiple with a filter_combine_ball_type. OnStartTouch !activator Explode.