Titan launcher can lock on through IR Smoke

[Mezilsa]

Arma 3 Version: 1.84 (stable)
CBA Version: 3.x.x (stable)
ACE3 Version: 3.12.4 (stable)

Mods:

- CBA_A3
- ace

Description:

• The Titan-Launcher can lock onto target behind IR-Smoke. As the target isn't visible it shouldn't be lock-able.

Steps to reproduce:

• Place a unit with a Titan
• Place a vehicle
• Throw a smoke in front of the vehicle
• Take your launcher, switch to IR and try to lock on
• Watch the missle fly straight through the smoke

Where did the issue occur?
-Editor(Singleplayer)

Additional information:

• https://i.imgur.com/nRxUGVo.jpg
• I assume this is a problem with the lineIntersect command used to find a target. Maybe to scan for smokesheels within 20 meter to the target would prove a viable fix for the problem.

[PabstMirror]

Some vehicle smoke grenades will be opaque in infrared, I think they use some nasty stuff like brass powder and graphite (don't breath this).
I think checkVisibility might be able to be used to check smoke, but probably can't differentiate between infantry smoke and IR smoke.