public void CalculateCR()
{
float cr = 0.0f;
if (SpellTrap)
{
// TODO: Finish the spells portion of Candlekeep,
// and then use it to calculate CR as spell level + 1
// here. In the mean time, we grossly overestimate
// spell trap CRs, so everyone knows they're wrong.
cr = 99.0f;
}
else
{
cr = ((float)DiceType / 2 * (float)DiceNumber) / 7;
int baseNumber = (int)cr;
if (SaveDC > 0)
{
int numberToSave = SaveDC - ((baseNumber / 2) + 4);
if (numberToSave < 2)
{
// We only fail on a natural 1. Any respectable rogue is totally
// unthreatened by this trap.
cr *= 0.05f;
}
else if (numberToSave > 19)
{
// We only succeed on a natural 20. Almost everyone in this trap
// is going to get hurt by it.
cr *= 0.95f;
}
else
{
// Remember this is the target rolling, so low numbers are
// an easier trap.
cr *= (numberToSave * 0.05f);
}
}
else
{
int numberToHit = baseNumber + 14 - AttackBonus;
if (numberToHit < 2)
{
// The trap only misses on a natural 1. Everyone gets punctured
cr *= 0.95f;
}
else if (numberToHit > 19)
{
// The trap only hits on a natural 20. Tanks march through with impunity,
// and rogues are probably fine.
cr *= 0.05f;
}
else
{
// Remember this is the trap rolling, so low numbers are
// a harder trap.
cr *= ((20 - numberToHit) * 0.05f);
}
}
if (DetectDC < 0)
{
cr /= 2;
}
else
{
float adjust = ((float)DetectDC - 16.0f - cr) * 0.2f;
if (adjust < -1.0f)
{
adjust = -1.0f;
}
if (adjust > 1.0f)
{
adjust = 1.0f;
}
cr += adjust;
}
if (DisarmDC < 0)
{
cr /= 2;
}
else
{
float adjust = ((float)DisarmDC - 16.0f - cr) * 0.2f;
if (adjust < -1.0f)
{
adjust = -1.0f;
}
if (adjust > 1.0f)
{
adjust = 1.0f;
}
cr += adjust;
}
if ((DamageType & CLRScriptBase.DAMAGE_TYPE_PIERCING) == CLRScriptBase.DAMAGE_TYPE_PIERCING ||
(DamageType & CLRScriptBase.DAMAGE_TYPE_SLASHING) == CLRScriptBase.DAMAGE_TYPE_SLASHING ||
(DamageType & CLRScriptBase.DAMAGE_TYPE_BLUDGEONING) == CLRScriptBase.DAMAGE_TYPE_BLUDGEONING)
{
cr *= 1.05f;
}
}
if ((DamageType & CLRScriptBase.DAMAGE_TYPE_NEGATIVE) == CLRScriptBase.DAMAGE_TYPE_NEGATIVE)
{
cr *= 1.1f;
}
if ((DamageType & CLRScriptBase.DAMAGE_TYPE_MAGICAL) == CLRScriptBase.DAMAGE_TYPE_MAGICAL)
{
cr *= 1.15f;
}
if (EffectSize > 1.0f)
{
cr *= 1.1f;
}
if (TargetAlignment != CLRScriptBase.ALIGNMENT_ALL ||
TargetRace != CLRScriptBase.RACIAL_TYPE_ALL)
{
cr *= 1.1f;
}
if (NumberOfShots < 0)
{
cr *= 1.5f;
}
else
{
float multiplier = 1.0f + (0.05f * (NumberOfShots - 1));
cr *= multiplier;
}
ChallengeRating = cr;
}
