[Vince]

Something like this might work, haven't tested it.

PHP код:

stock Float:GetDistanceBetweenPlayers(playerid, targetid)
{
    new
        Float:x1, Float:y1, Float:z1,
        Float:x2, Float:y2, Float:z2;
        
    if(GetPlayerPos(playerid, x1, y1, z1) && GetPlayerPos(targetid, x2, y2, z2))
    {
        return VectorSize(x1 - x2, y1 - y2, z1 - z2);
    }
    
    return Float:0x7f800000; // infinity
}
    
public OnPlayerTakeDamage(playerid, issuerid, Float:amount, weaponid, bodypart)
{
    if(issuerid != INVALID_PLAYER_ID && weaponid == WEAPON_SHOTGUN)
    {
        new
            Float:multiplier = 1.0,
            Float:distance = GetDistanceBetweenPlayers(playerid, issuerid),
            Float:extraDamage = 100.0 - distance - amount; // - amount to account for damage already taken
            
        switch(bodypart)
        {
            case 3, 4    : multiplier = 1.10; // chest, +10% damage
            case 5, 6    : multiplier = 0.85; // arms, -15% damage
            case 7, 8    : multiplier = 0.75; // legs, -25% damage
            case 9        : multiplier = 1.50; // head, +50% damage
        }
        
        extraDamage *= multiplier;
        
        if(extraDamage > 0.0)
        {
            new Float:currentHealth;
            GetPlayerHealth(playerid, currentHealth);
            SetPlayerHealth(playerid, currentHealth - extraDamage)
        }
    }
}