Please post questions and mods regarding grenades in this thread.
NOTE: Due to crunch on the multiplayer add-on, there won't initially be docs or tutorials for throwing weapons. Here is an excerpt from the 1.4.9 releasenotes regarding where to find info about how these systems work:
A new projectile script, 'vp_Grenade', which applies rigidbody force to a gameobject, and kills it by means of its own damagehandler after few seconds. If the damagehandler has an explosion death spawn object and the whole thing is fired from a vp_Shooter, then you have yourself a grenade! A new HD grenade model with pickups and item types included as an example. You can find it in Sky City.
Throwing weapon support
This is used for hand grenades in v1.4.9, but it could really be used to toss anything (rocks, darts, axes, knives, spears, shuriken). Two new weapon scripts, 'vp_WeaponThrower' and 'vp_FPWeaponThrower', for remote / AI and 1st person local players, respectively.
Keep in mind that this weapon type is exceedingly complex to set up (as far as UFPS is concerned, it is both a weapon and its own ammo at the same time). There is a detailed checklist of requirements at the top of the vp_WeaponThrower' and 'vp_FPWeaponThrower' scripts, so be sure to give both of those a close look.
Logically, a throwing weapon is a hidden "arm-only weapon" that is picked up along with e.g. grenade ammo. That is: a hand grenade pickup awards you both a projectile (the grenade) and a throwing weapon (typically an animated arm depicted throwing a grenade). If you already have this logical 'throwing weapon' then you won't get another one. Grenades in the form of units are kept in the inventory's internal unit bank and the throwing weapon is continually refilled with units under the hood. As soon as you throw one unit, another one pops into your hand until you're out of grenades and the 'weapon' is auto-unwielded.
There is new wielding and firing logic for thrown weapons. If AnimationType of a weapon is 'Thrown' and it is properly set up with a unitbank and ammo, the throwing weapon will be automatically 'reloaded' instantly when it is wielded. As long as there is ammo for it in the inventory, it will always have atleast one ammo ready for throwing.
NOTE: As for 3rd person, the features are in place for this to work, but the animations are placeholders. This makes tossing grenades look quite funny in 3rd person at present. You will need to find some good looking grenade throwing animations for this to look cool in 3rd person.