Difference between revisions of "Combat h.nss"

// -----------------------------------------------------------------------------
// Check if backstab conditions are true
// -----------------------------------------------------------------------------
int Combat_CheckBackstab(object oAttacker, object oTarget, object oWeapon, float fFlankingBonus)
{
    // -------------------------------------------------------------------------
    // If we we are a rogue
    // -------------------------------------------------------------------------
    if (!HasAbility(oAttacker, ABILITY_TALENT_HIDDEN_ROGUE))
    {
        return FALSE;
    }
 
    // -------------------------------------------------------------------------
    // Only humanoid rigs have the backstab anim 
    // -------------------------------------------------------------------------
    if (!IsHumanoid(oAttacker))
    {
        return FALSE;
    }
 
    // -------------------------------------------------------------------------
    // And target is not immune
    // -------------------------------------------------------------------------
    if (HasAbility(oTarget, ABILITY_TRAIT_CRITICAL_HIT_IMMUNITY))
    {
        return FALSE;
    }
 
    // -------------------------------------------------------------------------
    // And attacker does not use double strike mode
    // -------------------------------------------------------------------------
    if (IsModalAbilityActive(oAttacker, ABILITY_TALENT_DUAL_WEAPON_DOUBLE_STRIKE))
    {
        return FALSE;
    }
 
    // -------------------------------------------------------------------------
    // We can only backstab if we are flanking.
    // -------------------------------------------------------------------------
    if (fFlankingBonus>0.0)
    {
        return TRUE;
    }
    else
    {
         /* Coup de grace*/
        if (HasAbility(oAttacker, ABILITY_TALENT_BACKSTAB))
        {
            if (GetHasEffects(oTarget, EFFECT_TYPE_STUN))
            {
                return TRUE;
            }
            else if (GetHasEffects(oTarget, EFFECT_TYPE_PARALYZE))
            {
                return TRUE;
            }
        }
 
    }
 
    return FALSE;
}

// -----------------------------------------------------------------------------
// Determine the magnitude of positional bonuses for the attacker
// -----------------------------------------------------------------------------
float Combat_GetFlankingBonus(object oAttacker, object oTarget)
{
 
    if (HasAbility(oTarget, ABILITY_TALENT_SHIELD_TACTICS))
    {
        if (IsUsingShield(oTarget))
            return 0.0;
    }
 
    if (GetHasEffects(oTarget, EFFECT_TYPE_FLANK_IMMUNITY))
    {
        return 0.0;
    }
 
    float fAngle = GetAngleBetweenObjects(oTarget, oAttacker);
    float fFactor = 0.0;
 
    // -------------------------------------------------------------------------
    // The maximum bonus from position is +15
    // -------------------------------------------------------------------------
    float fMaxModifier = 15.0;
 
    // The attackers ability to flank is stored in a creature property
    float fFlankingAngle = GetCreatureProperty(oAttacker, PROPERTY_ATTRIBUTE_FLANKING_ANGLE);
 
    if (fFlankingAngle <= 10.0 ) /*old savegames have this at 10*/
    {
        fFlankingAngle = 60.0; // old savegames need this to avoid divby0 later
    }
    else if (fFlankingAngle>180.0)
    {
        fFlankingAngle = 180.0;
    }
 
 
    // -------------------------------------------------------------------------
    // Combat movement expands the maximum bonus to +20
    // -------------------------------------------------------------------------
    if (HasAbility(oAttacker, ABILITY_TALENT_COMBAT_MOVEMENT))
    {
        fMaxModifier = 20.0;
    }
 
    if ( fMaxModifier <= 0.0 )
    {
        return 0.0;
    }
 
    if ( (fAngle>= (180.0 - fFlankingAngle) && fAngle<=(180.0 + fFlankingAngle )))
    {
        // Shield block negates flanking on the left.
 
        int bShieldBlock =  HasAbility(oTarget,ABILITY_TALENT_SHIELD_BLOCK);
        int bUsingShield = IsUsingShield(oTarget);
 
        if (!bShieldBlock || fAngle < 180.0 || (bShieldBlock && !bUsingShield) )
        {
            fFactor = (fFlankingAngle -  fabs( 180.0 - fAngle))/fFlankingAngle;
        }
 
    }
 
    // Only rogues get the full positional benefits on the battlefield,
    // everyone else gets half
    float fClassModifier = GetCreatureCoreClass(oAttacker) == CLASS_ROGUE?1.0f:0.5f;
 
 
    return fFactor * fMaxModifier * fClassModifier;
}