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rpd:defense_mechanic [2025/12/29 09:28] – Update wiki pages: rename files to follow naming convention, add missing pages, fix formatting issues mikerpd:defense_mechanic [2025/12/29 09:33] (current) – external edit 127.0.0.1
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 +====== Defense Mechanic ======
  
 +Defense is a core combat mechanic in Remixed Dungeon that determines the chance to successfully evade incoming attacks.
 +
 +==== Defense Skill Formula ====
 +
 +The defense skill is calculated in the ''Char.java'' file as part of the ''defenseSkill'' method:
 +
 +<code java>
 +public int defenseSkill(Char enemy) {
 +
 +    int defenseSkill = baseDefenseSkill + lvl();
 +
 +    final int[] bf = {0};
 +    forEachBuff(b -> bf[0] += b.defenceSkillBonus(this));
 +
 +    int bonus = bf[0];
 +
 +    float evasion = (float) Math.pow(1.2, bonus);
 +    if (paralysed) {
 +        evasion /= 2;
 +    }
 +
 +    int aEnc = getItemFromSlot(Belongings.Slot.ARMOR).requiredSTR() - effectiveSTR();
 +
 +    if (aEnc > 0) {
 +        return (int) (defenseSkill * evasion / Math.pow(1.5, aEnc));
 +    } else {
 +
 +        if (getHeroClass() == HeroClass.ROGUE) {
 +
 +            if (getCurAction() != null && getSubClass() == HeroSubClass.FREERUNNER && !isStarving()) {
 +                evasion *= 2;
 +            }
 +
 +            return (int) ((defenseSkill - aEnc) * evasion);
 +        } else {
 +            return (int) (defenseSkill * evasion);
 +        }
 +    }
 +}
 +</code>
 +
 +==== Defense Skill Components ====
 +
 +==== Base Defense Skill ====
 +  * **Definition**: The character's base defense skill value
 +  * **Storage**: ''baseDefenseSkill'' field in Char class
 +  * **Examples**: 
 +    * Rat: 3
 +    * Warrior: 5 (in Hero class)
 +    * Thief: 12
 +    * Goo: 12
 +    * King: 25
 +    * Yog's Heart: 40
 +  * **Function**: Provides the foundational defense value before modifiers
 +
 +==== Level Bonus ====
 +  * **Formula**: ''baseDefenseSkill + lvl()''
 +  * **Effect**: Each level increases defense skill by 1 point
 +  * **Implementation**: ''baseDefenseSkill + lvl()'' in the calculation
 +
 +==== Buff Bonuses ====
 +  * **Mechanism**: Each buff with ''defenceSkillBonus'' increases the skill
 +  * **Formula**: Bonuses are summed and applied as exponential modifier to evasion: ''Math.pow(1.2, bonus)''
 +  * **Examples**: Various buffs can provide defense skill bonuses
 +
 +==== Paralysis Penalty ====
 +  * **Condition**: When character is paralyzed
 +  * **Effect**: Evasion is halved (''evasion /= 2'')
 +  * **Purpose**: Reduces defensive capabilities while paralyzed
 +
 +==== Armor Encumbrance ====
 +  * **Calculation**: ''aEnc = getItemFromSlot(Belongings.Slot.ARMOR).requiredSTR() - effectiveSTR()''
 +  * **Effect**: If ''aEnc > 0'' (armor requires more STR than available), defense is reduced by a factor of ''Math.pow(1.5, aEnc)''
 +  * **Impact**: Wearing armor that requires more strength than available significantly reduces defense
 +
 +==== Class-Specific Mechanics ====
 +  * **Hero Classes**: Non-rogues use basic formula ''defenseSkill * evasion''
 +  * **Rogues**: Use modified formula ''(defenseSkill - aEnc) * evasion'' and get additional bonuses
 +  * **Freerunner Subclass**: When not starving and moving, evasion is doubled (''evasion *= 2'')
 +
 +==== Combat Calculation ====
 +  * **Hit Chance**: The attacker's attack skill is compared against the defender's defense skill
 +  * **Calculation**: ''Random.Float(attacker.attackSkill(defender)) > Random.Float(defender.defenseSkill(attacker))''
 +  * **Result**: If true, the attack hits; if false, the attack misses
 +
 +==== Hero Defense Skill Enhancement ====
 +The Hero class has a special defense skill calculation:
 +
 +<code java>
 +// In Hero.java
 +public int defenseSkill(Char enemy) {
 +    float skillFactor = 1;
 +    
 +    if (getSubClass() == HeroSubClass.BRIGAND) {
 +        skillFactor *= 1.2;
 +    }
 +    
 +    return (int) (super.defenseSkill(enemy) * skillFactor);
 +}
 +</code>
 +
 +==== Defense in Combat ====
 +  * **Evasion**: The primary means of avoiding damage is through the defense skill system
 +  * **Hit Calculation**: ''Random.Float(attacker.attackSkill(defender)) > Random.Float(defender.defenseSkill(attacker))''
 +  * **Result**: If the attacker's roll is higher, the hit succeeds; otherwise, the defender evades
 +
 +==== Related String Resource ====
 +  * ''Char_StaDodged'': Text displayed when a character successfully dodges an attack
 +
 +==== Code References ====
 +  * Java: [[https://github.com/NYRDS/remixed-dungeon/blob/master/RemixedDungeon/src/main/java/com/watabou/pixeldungeon/actors/Char.java|Char.java]]
 +  * Java: [[https://github.com/NYRDS/remixed-dungeon/blob/master/RemixedDungeon/src/main/java/com/watabou/pixeldungeon/actors/hero/Hero.java|Hero.java]]
 +  * Java: [[https://github.com/NYRDS/remixed-dungeon/blob/master/RemixedDungeon/src/main/java/com/watabou/pixeldungeon/actors/CharUtils.java|CharUtils.java]]
 +
 +==== Related ====
 +  * [[rpd:attack_skill_mechanic|Attack Skill Mechanic]]
 +  * [[rpd:evasion_mechanic|Evasion Mechanic]]
 +  * [[rpd:combat_mechanic|Combat Mechanic]]
 +  * [[rpd:accuracy_mechanic|Accuracy Mechanic]]
 +  * [[rpd:armor_item|Armor Item]]
 +
 +{{tag> rpd mechanics combat defense skill }}
rpd/defense_mechanic.txt · Last modified: by 127.0.0.1
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