/// <summary>
/// Performs a cast of a spell from the caster onto the target Actor instance.
/// </summary>
/// <param name="spell">The spell being cast.</param>
/// <param name="caster">The avatar casting the spell.</param>
/// <param name="target">The target Actor instance, avatar or item.</param>
/// <returns>The results of the casting.</returns>
public static CastResults PerformCast(
ISpell spell,
IAvatar caster,
IActor target)
{
CastResults results = new CastResults();
// Used for sending messages to the defender's Context.
IAvatar defender = target as IAvatar;
// Ensure that the spell can be cast on the target.
if (Object.ReferenceEquals(caster, target))
{
if (spell.IsDamageSpell)
{
caster.Context.Add(new RdlErrorMessage(SR.CastNotSelf));
return(results);
}
}
// To determine the effect’s difficulty rating, all foci scores are added together.
int difficulty = spell.Foci.GetDifficulty();
//The sphere or discipline skill test is then made vs. Intelligence, opposed by the opposing successes of the difficulty
//rating roll (see Section 1.2.1). If no successes are remain, then the effect fails and the character burns no mind.
//If a disastrous failure is rolled, the character takes the effect himself (if it’s offensive), it has its opposite effect, or
//whatever the GM decides; the character also burns extra mind equal to the extent of the critical failure (if two 10s
//were rolled on 2d10, the character would eat the effect and burn 2 extra mind).
//Note that offensive effects with no area foci require a successful combat roll to strike the target, on the sphere or
//discipline skill in the case of ranged attacks, or on an unarmed combat (or similar) skill in the case of touch effects.
//Called shots can be made as in normal combat.
//The defender may be allowed a Dodge roll for defense against being hit by some effects. Generally, if the attacker
//must make a perception or dexterity roll to hit, the defender will probably be allowed a Dodge roll.
int casterSuccessCount;
SkillManager.PerformSkillTest(caster, spell.Skill, AttributeType.Intelligence, difficulty, spell.SkillLevelRequiredToEquip, true, out casterSuccessCount);
// Raise the OnCastSkillRoll event to determine if the success roll should be overwritten.
caster.OnCastSkillRoll(spell, ref casterSuccessCount);
results.CastSuccessCount = casterSuccessCount;
//Producing an effect, if successful, burns Mind. The amount of Mind burned is equal to the effect’s difficulty
//minus the number of effective successes rolled (that is, what successes are left after the opposing successes are taken
//into account), for a minimum of zero.
int mindValueUsed = (difficulty - casterSuccessCount);
if (mindValueUsed <= 0)
{
mindValueUsed = 1;
}
// Caster needs to the required amount of mind value.
if (caster.Mind < mindValueUsed)
{
caster.Context.Add(new RdlErrorMessage("You do not have the required Willpower to cast this spell."));
return(results);
}
if (casterSuccessCount < 0 && spell.IsDamageSpell)
{
// Disatrous failure, spell backfires!
caster.SetMind(caster.Mind - mindValueUsed);
caster.SetMind(caster.Mind + casterSuccessCount);
// Apply damage to the caster.
caster.SetBody(caster.Body - spell.Foci.Power);
caster.Context.Add(new RdlErrorMessage(SR.CastBackfired));
if (caster.IsDead)
{
results.CasterDied = true;
caster.Context.Add(new RdlErrorMessage(SR.CastBackfiredKilledCaster));
}
else if (caster.IsUnconscious)
{
results.CasterUnconscious = true;
caster.Context.Add(new RdlErrorMessage(SR.CastBackfiredUnconsciousCaster));
}
}
else if (casterSuccessCount > 0)
{
results.CastSuccessful = true;
// Spell successful.
caster.SetMind(caster.Mind - mindValueUsed);
// Inform the caster of the successful cast.
//caster.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Positive,
// SR.CastSuccess(spell.Name, target.A())));
spell.Cast(caster, target, results);
caster.OnCastSuccess(spell);
// Handle death messages.
if (defender.IsDead)
{
caster.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Cast,
SR.AttackYouKilledDefender(defender.The())));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative,
SR.AttackYouWereKilledByAttacker(caster.The())));
}
else if (defender.IsUnconscious)
{
caster.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Cast,
SR.AttackUnconsciousDefender(defender.TheUpper())));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative,
SR.AttackYouAreUnconscious));
}
// Send down both the body and mind values of both the caster and the target to both the
// caster and the target.
RdlTag[] casterTags = caster.GetRdlProperties(Avatar.BodyProperty, Avatar.MindProperty);
RdlTag[] defenderTags = null;
if (defender != null)
{
defenderTags = defender.GetRdlProperties(Avatar.BodyProperty, Avatar.MindProperty);
}
caster.Context.AddRange(casterTags);
if (defenderTags != null)
{
caster.Context.AddRange(defenderTags);
}
if (defender != null)
{
defender.Context.AddRange(defenderTags);
defender.Context.AddRange(casterTags);
}
}
else
{
// Missed.
caster.Context.Add(new RdlErrorMessage(SR.CastFailed));
if (defender != null)
{
defender.Context.Add(new RdlErrorMessage(SR.CasterCastFailed(caster.A())));
}
}
//If an effect burns more mind than the character has available, then any overflow causes wounds. This is called
//channeling, and can be done even when the caster has zero mind. If a character channels to below 0 body, his life
//begins seeping away (treat it as any other wound below zero), and he must be magically or psionically healed or he
//will die when he passes his negative physical endurance.
if (caster.Mind < 0)
{
int channelingDamage = caster.Mind;
caster.SetMind(0);
caster.SetBody(caster.Body - channelingDamage);
caster.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative, SR.CastChanneling));
}
// Regardless of outcome advance both the caster and target skills.
SkillManager.AdvanceSkill(caster, spell.Skill, spell.SkillLevelRequiredToEquip, caster.Context);
// NOTE: Do not have resist skills...
//if (defender != null)
//{
// // Use attackerWeapon as the required skill level so the defender can not elevate beyond the skill used
// // for the attack.
// SkillManager.AdvanceSkill(defender, defensiveSkill, spell.SkillLevelRequiredToEquip, defender.Context);
//}
return(results);
}
