[Effeff]

Thanks for your advice.

I currently have this, but I am getting a number in the thousands.

PHP Code:

float GetDamageVelocityModifier(int attacker, int victim)
{
    float attackerPos[3], victimPos[3], unitVec[3], attackerVel[3], attackerNextPos[3], attackerVelVec[3];

    GetClientAbsOrigin(attacker, attackerPos);
    GetClientAbsOrigin(victim, victimPos);
    MakeVectorFromPoints(attackerPos, victimPos, unitVec);

    GetEntPropVector(attacker, Prop_Data, "m_vecVelocity", attackerVel);
    AddVectors(attackerPos, attackerVel, attackerNextPos);
    MakeVectorFromPoints(attackerPos, attackerNextPos, attackerVelVec);

    return 1 + 0.5 * GetVectorDotProduct(unitVec, attackerVelVec);
} 


I am guessing what I forgot to do is use NormalizeVector somewhere?