sourceIndex

the index of the character that dealt the hit. If the target avatar is a player, add 0x10000 to the real index value (0-2048). If the target avatar is a NPC, set the index as it is. If there is no source, set the index to -1. The index will be used for tinting purposes, as both the player who dealt the hit, and the recipient will see a tinted variant. Everyone else, however, will see a regular darkened hit mark.