/// <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);
}
/// <summary>
/// Performs a simple combat turn.
/// </summary>
/// <param name="attacker">The attacking avatar.</param>
/// <param name="attackerWeapon">The weapon to be used during the attack.</param>
/// <param name="defender">The defending avatar.</param>
/// <param name="defensiveSkill">The skill used to defender against the attack.</param>
/// <param name="defenderAttributeType">The attribute used to defend.</param>
/// <param name="range">The range from the attacker to the defender.</param>
/// <returns>True if the defender was killed during the attack; otherwise false.</returns>
public static bool PerformSimpleCombatTurn(
IAvatar attacker,
IWeapon attackerWeapon,
string offensiveSkill,
IAvatar defender,
string defensiveSkill,
AttributeType defenderAttributeType,
int range)
{
// Only true if the defender gets killed.
bool result = false;
int defenderProtection = defender.GetArmor().Protection;
//Phase 1: The Combat Skill Test
//The attacker makes a combat skill test vs. Physical Dexterity (in the case of melee attacks or point blank ranged
//attacks) or Mental Perception (in the case of ranged attacks at short range or greater), while the defender makes a
//defense skill test against an appropriate combative or defensive skill, to determine the number of opposing successes.
//If the number of successes scored by the attacker do not exceed the number of successes scored by the defender, then
//the target has been hit.
int attackerSkillLevel = (int)attacker.Skills[offensiveSkill];
int defenderSkillLevel = (int)defender.Skills[defensiveSkill];
if (attackerWeapon.Durability <= 0)
{
attackerSkillLevel = 0;
}
AttributeType attackerAttrType = AttributeType.Strength; // Was Dex, should it go back to Dex?
if (attackerWeapon.Range > 1)
{
attackerAttrType = AttributeType.Perception;
}
// Perform skill rolls.
int attackerSuccessCount;
SkillManager.PerformSkillTest(attacker, offensiveSkill, attackerAttrType, 0, attackerWeapon.SkillLevelRequiredToEquip, false, out attackerSuccessCount);
int defenderSuccessCount;
SkillManager.PerformSkillTest(defender, defensiveSkill, defenderAttributeType, 0, defender.GetArmor().SkillLevelRequiredToEquip, false, out defenderSuccessCount);
// TODO: Implement disatrous failure in combat.
//• In the case of a disastrous failure, the character has fumbled and loses his next attack. A very high degree
//(3+) disastrous failure may indicate weapon breakage. This applies to both the offensive and defense sides of
//the combat.
// Range
//• While a ranged attack at point blank range suffers no penalty, other ranged attacks will incur a penalty to
//the attack roll target number based on the distance to the target. Attacks attempted within short range for
//the weapon will suffer a penalty of -1, while attacks within medium range will suffer a -2 penalty and attacks
//within long range will suffer a penalty of -4.
if (range > 1)
{
attackerSuccessCount -= range;
if (attackerSuccessCount == 0)
{
attacker.Context.Add(new RdlSystemMessage(0, SR.AttackOutOfRange));
}
}
int outcome = attackerSuccessCount - defenderSuccessCount;
// Raise an event on the attacker so that the outcome can be modified based on world specific conditions.
attacker.OnAttack(ref outcome);
if (outcome > 0)
{
// DEFENDER WAS HIT.
//Phase 2: Damage Determination
//The damage value of the attacker’s weapon is added to the number of combat successes that the attacker has
//remaining. This is the Damage Value.
//Small weapons will typically cause 1 point of damage, medium weapons 2 points, and heavy weapons 3 points of
//damage. Additionally, melee weapon damage is modified by a value equal to the attacker’s strength value minus 5.
//If a character is exceptionally weak, this will subtract damage from the final value (base damage plus successes). The
//modified damage value can never be less than zero.
int damage = attackerSuccessCount + attackerWeapon.Power;
damage += attacker.Attributes[AttributeType.Strength] - 5;
if (damage <= 0)
{
damage = 1;
}
//Phase 3: Application of Armor
//A piece of armor has two statistics, coverage rating (CR) and absorption rating (AR). CR ranges from 1 (very
//little coverage) to 5 (complete coverage). AR can range from as little as 1 for thin leather or heavy cloth to as much
//as 8 or more for magical or unusual armors.
//The attacker’s remaining successes are applied to the coverage rating. If the number of successes exceeds the
//armor’s coverage rating, then the armor has been bypassed (a better executed hit is more likely to bypass armor), in
//which case all damage goes straight to the defender. If the attack fails to bypass the armor, then the armor removes
//one point of damage per point of absorption. Any damage equal to or beyond the armor’s absorption rating indicates
//that the armor has been pierced or rendered ineffective in some way. When this happens, any excess damage is
//applied to the character (see below), and the armor’s coverage rating is reduced by one (the armor is damaged) until
//it can be repaired by someone with the appropriate skill (this could include the character if they have said skills).
//Armor with a CR of 5+ cannot be damaged by penetration. This CR is usually only used for creatures with
//natural armor or who are made of unnaturally hard substances.
defender.OnApplyProtection(attacker, ref damage);
//if (attackerSuccessCount <= (defenderProtection * 0.5))
//{
// // Let armor absrob some or all of the damage.
// // Do not reduce damage more than half because of armor.
// int newDmg = damage - (int)(defenderProtection * 0.5);
// if (newDmg < (damage * 0.5))
// {
// damage = (int)(damage * 0.5);
// }
// if (damage <= 0) damage = 1;
//}
if (damage > 0)
{
// Decrement the durability of the defender's armor.
defender.GetArmor().Durability--;
//Phase 4: Apply Damage
//Any remaining wounds after the application of armor are subtracted from the character’s Body stat.
defender.SetBody(defender.Body - damage);
attacker.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Melee, SR.AttackHitDefender(defender.The(), damage)));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative, SR.AttackHitByAttacker(attacker.The(), damage)));
if (defender.IsDead)
{
result = true;
attacker.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Melee,
SR.AttackYouKilledDefender(defender.The())));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative,
SR.AttackYouWereKilledByAttacker(attacker.The())));
}
else if (defender.IsUnconscious)
{
attacker.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Melee,
SR.AttackUnconsciousDefender(defender.TheUpper())));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative,
SR.AttackYouAreUnconscious));
}
}
else
{
attacker.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative, SR.AttackFailed));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.None, SR.AttackAttackerFailed(attacker.A())));
}
}
else
{
// Attacker missed.
attacker.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.Negative, SR.AttackMiss));
defender.Context.Add(new RdlSystemMessage(RdlSystemMessage.PriorityType.None, SR.AttackAttackerFailed(attacker.A())));
}
// Regardless of outcome advance the skill of the attacker and the defender.
SkillManager.AdvanceSkill(attacker, attackerWeapon.Skill, attackerWeapon.SkillLevelRequiredToEquip, attacker.Context);
// Use attackerWeapon as the required skill level so the defender can not elevate beyond the skill used
// for the attack.
SkillManager.AdvanceSkill(defender, defensiveSkill, attackerWeapon.SkillLevelRequiredToEquip, defender.Context);
// Return result of the combat action
return(result);
}