Zandronum

Catastrophe wrote: Yeah, look at the ghostbuster traps in GvH

Ivan wrote:

Or Ragnarok DM, which has an example that works exactly the way OP describes.

Ivan wrote: The plasma cannon, found in 3rd or 4th map. Although you might need to define a new key to detonate it, still, it's the same for altfire really. (With enabling A_Weaponready and necessary flags to allow alt fire to pass)

Ijon Tichy wrote: It's simple, really. Have the projectile constantly check for an item in the player's inventory. If it's there, jump to a state where it does an A_Stop (to stop in midair), then do some explosion shit and disappear. Alternately, have it call A_Die, which would drop its health to 0 and put it in the Death state, and have the A_Stop there.

This grenade lays on the ground and does not detonate until the player gets the DakkaDetonateGrenades item.

Code: Select all

// This is the inventory item that will be placed in the player's inventory
// to detonate it; give it through whatever method, take it immediately after
actor DakkaDetonateGrenades: Inventory { Inventory.MaxAmount 1 +UNDROPPABLE }

// The grenade itself
actor DakkaRemoteGrenade
{
    // irrelevant

    States
    {
      Spawn:
        SGRN A 1 bright
        SGRN A 0 A_JumpIfInTargetInventory("DakkaDetonateGrenades", 1, "Detonate")
        loop
      
      Detonate:
        SGRN A 0 A_Die
        goto Death2  // should never be reached

      Death:
        SGRN A 0 A_Stop
        SGRN A 0 A_ChangeFlag("NOGRAVITY", 1)
        SGRN A 0 A_JumpIfInTargetInventory("DakkaDetonateGrenades", 1, "Death2")
        goto OnGround

      OnGround:
        SGRN A 1 bright
        loop

      Death2:
        SGRN A 0 A_Stop
        SGRN A 0 A_ChangeFlag("NOGRAVITY", 1)
        MISL B 0 A_SetTranslucent(1, 1)
        MISL B 0 bright A_PlaySound("dakka/explode")
        MISL B 0 bright A_Explode(96, 144, 0)
        MISL B 0 bright A_Explode(64, 144)
        MISL B 8 bright
        MISL C 6 bright
        MISL D 4 bright
        stop
    }
}