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The More RPG Library adds custom entity attributes that extend Minecraft’s attribute system. These attributes control various gameplay mechanics including fuse modifiers, status effect chances, and combat modifiers.

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Overview

All attributes are registered as ClampedEntityAttribute instances with a base value, minimum value, and maximum value. They are tracked attributes, meaning their values are synchronized between server and client. Source: net.more_rpg_classes.entity.attribute.MRPGCEntityAttributes

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Attribute Registration

Attributes are registered using the following pattern: 
private static RegistryEntry<EntityAttribute> register(
    final String name, 
    double base, 
    double min, 
    double max
) {
    EntityAttribute attribute = new ClampedEntityAttribute(
        "attribute.name." + MOD_ID + '.' + name, 
        base, 
        min, 
        max
    ).setTracked(true);
    return Registry.registerReference(
        Registries.ATTRIBUTE, 
        Identifier.of(MOD_ID, name), 
        attribute
    );
}
Source: MRPGCEntityAttributes.java:34-37

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Combat Modifiers

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DAMAGE_REFLECT_MODIFIER

Identifier.of("more_rpg_classes", "damage_reflect_modifier")
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base
double
default:"100.0"
Base percentage value for damage reflection
​
min
double
default:"100.0"
Minimum allowed value
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max
double
default:"1024.0"
Maximum allowed value
Description: Modifier that controls the percentage of damage reflected back to attackers. Source: MRPGCEntityAttributes.java:14

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LIFESTEAL_MODIFIER

Identifier.of("more_rpg_classes", "lifesteal_modifier")
​
base
double
default:"100.0"
Base percentage value for lifesteal
​
min
double
default:"100.0"
Minimum allowed value
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max
double
default:"1024.0"
Maximum allowed value
Description: Modifier that controls the percentage of damage converted to healing on attacks. Source: MRPGCEntityAttributes.java:15

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RAGE_MODIFIER

Identifier.of("more_rpg_classes", "rage_modifier")
​
base
double
default:"100.0"
Base percentage value for rage generation/effectiveness
​
min
double
default:"100.0"
Minimum allowed value
​
max
double
default:"1024.0"
Maximum allowed value
Description: Modifier that controls rage-related mechanics. Source: MRPGCEntityAttributes.java:16

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SPELL_VAMPIRE

Identifier.of("more_rpg_classes", "spell_vampire")
​
base
double
default:"100.0"
Base percentage value for spell vampirism
​
min
double
default:"100.0"
Minimum allowed value
​
max
double
default:"1024.0"
Maximum allowed value
Description: Modifier that controls the percentage of spell damage converted to healing. Source: MRPGCEntityAttributes.java:17

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ARMOR_PIERCING

Identifier.of("more_rpg_classes", "armor_piercing")
​
base
double
default:"100.0"
Base percentage value for armor penetration
​
min
double
default:"100.0"
Minimum allowed value
​
max
double
default:"200.0"
Maximum allowed value (capped at 200%)
Description: Controls the percentage of armor ignored when dealing damage. Source: MRPGCEntityAttributes.java:31

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TENACITY

Identifier.of("more_rpg_classes", "tenacity")
​
base
double
default:"100.0"
Base percentage value for crowd control resistance
​
min
double
default:"100.0"
Minimum allowed value
​
max
double
default:"200.0"
Maximum allowed value (capped at 200%)
Description: Controls resistance to crowd control effects and their duration. Source: MRPGCEntityAttributes.java:32

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Fuse Modifiers

Fuse modifiers control the effectiveness of spell school-specific fuse mechanics.

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AIR_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "air_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:18

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ARCANE_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "arcane_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:19

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EARTH_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "earth_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:20

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FIRE_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "fire_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:21

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FROST_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "frost_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:22

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HEALING_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "healing_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:23

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WATER_FUSE_MODIFIER

Identifier.of("more_rpg_classes", "water_fuse_modifier")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"1024.0"
Source: MRPGCEntityAttributes.java:24

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Status Effect Chance Attributes

These attributes control the percentage chance to apply various status effects on hit.

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BURNING_CHANCE

Identifier.of("more_rpg_classes", "burning_chance")
​
base
double
default:"100.0"
Base chance percentage (100 = base, 200 = 100% guaranteed)
​
min
double
default:"100.0"
​
max
double
default:"200.0"
Maximum 200% (double the base chance)
Description: Controls the chance to apply burning effects on hit. Source: MRPGCEntityAttributes.java:25

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STAGGER_CHANCE

Identifier.of("more_rpg_classes", "stagger_chance")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"200.0"
Description: Controls the chance to apply the STAGGER status effect on hit. Source: MRPGCEntityAttributes.java:26

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STUN_CHANCE

Identifier.of("more_rpg_classes", "stun_chance")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"200.0"
Description: Controls the chance to apply stun effects on hit. Source: MRPGCEntityAttributes.java:27

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POISON_CHANCE

Identifier.of("more_rpg_classes", "poison_chance")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"200.0"
Description: Controls the chance to apply poison effects on hit. Source: MRPGCEntityAttributes.java:28

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FREEZE_CHANCE

Identifier.of("more_rpg_classes", "freeze_chance")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"200.0"
Description: Controls the chance to apply freeze effects on hit. Source: MRPGCEntityAttributes.java:29

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BLEEDING_CHANCE

Identifier.of("more_rpg_classes", "bleeding_chance")
​
base
double
default:"100.0"
​
min
double
default:"100.0"
​
max
double
default:"200.0"
Description: Controls the chance to apply the BLEEDING status effect on hit. Source: MRPGCEntityAttributes.java:30

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Usage Examples

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Reading Attribute Values

// Get entity's lifesteal modifier
double lifesteal = entity.getAttributeValue(
    MRPGCEntityAttributes.LIFESTEAL_MODIFIER
);

// Get armor piercing percentage
double armorPiercing = entity.getAttributeValue(
    MRPGCEntityAttributes.ARMOR_PIERCING
);

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Modifying Attributes

// Add a permanent +20% bleeding chance modifier
entity.getAttributeInstance(MRPGCEntityAttributes.BLEEDING_CHANCE)
    .addPersistentModifier(new EntityAttributeModifier(
        UUID.randomUUID(),
        "bleeding_bonus",
        20.0,
        EntityAttributeModifier.Operation.ADD_VALUE
    ));

// Add a temporary damage reflection modifier
entity.getAttributeInstance(MRPGCEntityAttributes.DAMAGE_REFLECT_MODIFIER)
    .addTemporaryModifier(new EntityAttributeModifier(
        UUID.randomUUID(),
        "temporary_reflection",
        0.5,  // +50%
        EntityAttributeModifier.Operation.ADD_MULTIPLIED_TOTAL
    ));

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Checking Attributes in Combat

// Example: Apply lifesteal healing
public void onEntityHit(LivingEntity attacker, LivingEntity target, float damage) {
    double lifestealMod = attacker.getAttributeValue(
        MRPGCEntityAttributes.LIFESTEAL_MODIFIER
    );
    
    // Convert modifier to actual lifesteal percentage
    float lifestealPercent = (float)(lifestealMod / 100.0);
    float healing = damage * lifestealPercent;
    
    attacker.heal(healing);
}

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Using with Custom Methods

// The getHighestDamageAttribute method uses these attributes
double highestDamage = CustomMethods.getHighestDamageAttribute(entity);

// Internally checks:
// - GENERIC_ATTACK_DAMAGE
// - Ranged weapon damage (if mod loaded)
// - Highest spell school power

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Attribute Modifier Operations

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ADD_VALUE
Operation
Adds the modifier value directly to the base attribute value.Example: base: 100, modifier: +20 = 120
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ADD_MULTIPLIED_BASE
Operation
Multiplies the base value by (1 + modifier), applied before ADD_MULTIPLIED_TOTAL.Example: base: 100, modifier: 0.5 = 100 * 1.5 = 150
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ADD_MULTIPLIED_TOTAL
Operation
Multiplies the final value by (1 + modifier), applied last.Example: current: 150, modifier: 0.2 = 150 * 1.2 = 180

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Percentage Value Interpretation

Most attributes use a base value of 100.0 representing 100%:
  • 100.0 = 100% (normal/base value)
  • 150.0 = 150% (+50% increase)
  • 200.0 = 200% (double effectiveness)
  • 50.0 = 50% (half effectiveness)
Exception: Modifiers are typically applied as percentages of the base value, not absolute values.

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See Also