6.2.1.0

• Added armor_trim item function
  • Applies a random trim to trimmable armor, picking material from materials and pattern from patterns (both optional lists, if missing or empty any registered one can be picked). show_in_tooltip defaults to true

6.2.0.0

• Added event presets, in data/<namespace>/mobs_properties_randomness/presets/events/
  • An event preset contains a single event (the same JSON of an event property, without "property": "event"). id is optional and defaults to the preset id
  • Reference it with {"property": "event", "preset": "namespace:path"}. The property can still have its own conditions and target
  • Every reference shares the same event, so the preset can be used by multiple mobs/presets without id conflicts
• Added in_combat condition
  • An entity is considered in combat if it has been attacked by or has attacked another entity within the specified seconds.
• Implemented mode in presets properties (as in v4/v5)
  • exclusive (default): presets are applied first, and the other properties of the mob/preset are applied only if no preset was applied
  • before: presets are applied before the other properties
  • after: presets are applied after the other properties
• Breaking: time_played condition and modifier now use hours instead of minutes
  • minutes_played has been renamed to hours_played, minutes to hours and amount_per_minutes to amount_per_hours. E.g. "minutes_played": {"min": 60} must now be "hours_played": {"min": 1}
• Fixed mobs with preset nbt (e.g. summoned with /mpr summon) re-applying the preset every time they were loaded (chunk reload, server restart, dimension change)
• Fixed a crash when an event property had an unknown event type. The property is now skipped with a warning, like unknown properties
• Events with an id already used by another event now fail to load, instead of being silently ignored
• Fixed an event triggering multiple times when applied more than once to the same mob
• Fixed events not triggering while data packs were reloading, and a possible crash during /reload
• Fixed events still triggering on existing mobs after their mob/preset file failed to load on /reload
• Fixed a crash when all the items in equipment had a weight of 0 or less. Items with a weight of 0 or less are now never picked
• lvl is now required in enchant item functions with type: with_levels. Before, omitting it crashed the game when the item was generated
• Fixed distance_from_spawn modifier with operation: multiply setting the value to 0 at world spawn. It now works as documented: value * (1 + increase)
• Fixed deepness modifier with operation: multiply and no starting_amount setting the value to 0 above starting_y. starting_amount now defaults to 1 with multiply (still 0 with add)
• Fixed time_played modifier with operation: multiply always doubling the value. With multiply, cap now limits only the increase (e.g. cap: 0.5 = up to +50%) and mode: average no longer averages the base 1 too
• Fixed boss_bar disappearing forever when the mob was unloaded (e.g. chunk unload, server restart, dimension change)
• Fixed every mob being healed to max health when spawning, even if no property changed its max health (e.g. ignoring Health set by /summon or spawners)
  • attribute_modifier properties on max health now keep the mob's health percentage instead (also when applied by events)
• Fixed death events with cancel_death overriding the health set by their apply_properties (e.g. heal), always leaving the mob at 0.01 health
• Fixed kill events triggering even if the victim's death was canceled
• death events now also trigger when the mob dies without a killer (e.g. fall damage, lava, /kill). Before, they only triggered if the mob was killed by a living entity
  • Added require_entity to death, kill, attack and damaged events (defaults to false)
    If true, the event triggers only if the damage was caused by a living entity. Set it to true in death events to get the old behavior
• Fixed potion_effect with stackable duration mixing ticks and seconds, resulting in way longer effects (e.g. 10s left + 5s gave 205s instead of 15s). Stacking on an infinite effect now keeps it infinite
• Fixed potion_effect warning about ambient with hidden particles showing when particles were visible instead
• Fixed conditions with target: other inside an or condition always failing
• Fixed score condition creating a score entry in the scoreboard for every mob checked. Mobs without a score now don't satisfy the condition
• Fixed time_played condition with player: any checking a random player in range instead of the nearest
• Fixed day_time condition losing precision in long-lived worlds
• Fixed attack/damaged events modifying the damage even when health_left was not satisfied
• Fixed damaged events reading an outdated damage amount when multiple damaged events modify the damage
• Fixed round in ranges (e.g. {"min": 1, "max": 5, "round": 0}) being ignored. It now rounds the final random value, with every possible value having the same chance
• Fixed integer ranges (e.g. potion_effect amplifier, set_count, nbt with integer/boolean type) almost never rolling the max value (e.g. an amplifier of {"min": 1, "max": 3} gave 1 or 2, a boolean nbt with {"min": 0, "max": 1} was always false)
• Fixed change_target events not detecting the previous target of brain based mobs (e.g. piglins, hoglins), making new_target trigger on every target change and switch_target never trigger
• nbt is now required in raw_nbt properties. Before, omitting it crashed the game when the property was applied
• Fixed presets properties nested in other properties (e.g. in events' apply_properties) being silently ignored
• Fixed a possible failure of the whole /reload when an error message contained a % character
• Fixed several JSON serializers writing missing or wrong fields
• Fixed equipment items emptied by their functions (e.g. set_count to 0) clearing the slot instead of keeping the current item. Only minecraft:air clears the slot now
• enchant item function fixes
  • random and single now check compatibility with the enchantments already stored in enchanted books
  • with_levels now excludes curses/treasure (if disabled) before picking the enchantments, instead of picking them and then discarding them, resulting in fewer enchantments
  • with_levels now respects allow_incompatible with the enchantments already on the item
• Condition, modifier and function preset references ({"preset": "..."}) with other fields (e.g. inverted, target) now fail to load instead of silently ignoring them
• Fixed exploding creepers having effects longer than 30 minutes (and infinite ones) removed from themselves (e.g. not triggering on death effects like Oozing) and excluded from the lingering cloud even with betterCreeperLingering disabled. Now they're only excluded from the cloud, and only when the config is enabled
• structure condition now reports non-existing structures when loading, instead of sending a message in chat every time a mob is checked
• Documented that weather: rain is also true during thunderstorms
• /mpr summon now fails with an unknown preset, instead of summoning a normal mob, and uses the local difficulty of the summon position instead of the command source's one
• Mobs with the same priority are now always applied in the same order (sorted by file id)
• Minor performance improvement for damage_immunity
• slots in add_attribute_modifier item functions and event_priority are now lowercase like the other values (e.g. "mainhand", "highest"). Uppercase values still work
• Fixed presets inside a preset never being applied when the preset was applied via preset nbt (e.g. /mpr summon)
• Fixed a death event with cancel_death overriding the health healed by a previous death event of the same mob

6.1.10.0

• Added target field to properties inside apply_properties
  • Defaults to the event's own target if omitted, so existing data packs behave the same.
    When set, it overrides where that specific property is applied, independently of the event's target and of the other properties in the same apply_properties list.
    E.g., a single event with a 50% chance can now apply one property to "this" and another to "other" at the same time.

6.1.9.0

• Added target field to conditions
  • Defaults to "this", used in events to decide which entity to check the conditions against.
    Before, you couldn't check for conditions on "other" while applying properties to "this". Now you can.
    E.g., you can now apply an effect to "this" if the attacker ("other") has a certain item.
    This propagates to inner conditions too, so in apply_properties, nested modifiers, etc. you can decide to check conditions against "this" or "other"

6.1.8.0

• Added days_passed condition

6.1.7.2

• Fixed health_left check in damaged/attack events being inverted (was triggering outside the specified range instead of inside)
• Fixed flat_health_left in damaged/attack events using percentage by default and flat health when enabled, instead of the other way around
• Fixed nbt property with boolean type using a random chance instead of setting a true/false value
• Fixed potion_effect's stackable amplifier/duration discarding the previously stacked value when a cap was set, instead of summing then clamping to the cap

6.1.7.1

• Fixed weather condition "thunder" not working

6.1.7.0

• Stack traces are now hidden from errors in logs by default and can be enabled with a config option
  • Basically an error should show up much cleaner in the log

6.1.6.1

• Fixed On Hit events not checking for conditions before applying the damage multiplier

6.1.6.0

• Added remove_potion_effects and remove_attribute_modifiers properties

Technical

• Properties, Conditions etc are now registry objects, like blocks and items

6.1.5.2

Technical

• Fixed events being posted too early, not working

6.1.5.1

Technical

• Fixed events being posted too early, not working

6.1.5.0

Technical

• Changed how Registries work
  • Now requires an event to register properties, conditions, etc

6.1.4.1

• Fixed play_sound not working if played from a player

6.1.4.0

• Added has_owner condition

6.1.3.2

• Updated for latest InsaneLib

6.1.3.1

• Disabled warning message when reloading by default

6.1.3.0

• Added message to chat when reloading generates errors or warnings

6.1.2.0

• Inverted how priority on mobs works.

6.1.1.1

• Fixed biome condition not working

6.1.1.0-beta

• Changed some fields for Potion effects
  • hide_particles -> show_particles: defaults to true now
  • Added show_icon: defaults to true
• Fixed attribute modifiers erroring (failing to spawn the mob) if a modifier with the same id is already applied

6.1.0.0-alpha

BREAKING CHANGES Please read carefully

• More presets!
  • PLEASE NOTE that mobs presets now live in data/<namespace>/mobs_properties_randomness/presets/mobs/ instead of data/<namespace>/mobs_properties_randomness/presets/.
  • This version introduces modifiers, conditions and functions presets.
    These are used if you have multiple conditions, modifiers and functions that repeat, and instead you can write once and reference.
  • Example, you want to apply a global difficulty scaling modifier to many attribute values, but this is repetitive

    [
    {
        "property": "attribute_modifier",
        "attribute": "minecraft:generic.max_health",
        "id": "ns:bonus_health",
        "amount": {
            "value": 1,
            "modifiers": [
                {
                    "modifier": "difficulty", 
                    "operation": "multiply", 
                    "easy": 0.75, 
                    "hard": 1.5 
                }
            ]
        },
        "operation": "add_multiplied_base"
    },
    {
        "property": "attribute_modifier",
        "attribute": "minecraft:generic.movement_speed",
        "id": "ns:movement_speed",
        "amount": {
            "value": 0.10,
            "modifiers": [
                { 
                    "modifier": "difficulty", 
                    "operation": "multiply", 
                    "easy": 0.75, 
                    "hard": 1.5 
                }
            ]
        },
        "operation": "add_multiplied_base"
    }
    ]
    

    To avoid all this redundancy, you can use a modifier preset. in data/ns/presets/modifiers/difficulty_scaling.json. A modifier preset can contain as many modifiers as you want.

    [
        { "modifier": "difficulty", "operation": "multiply", "easy": 0.75, "hard": 1.5 }
    ]
    

    So the properties can become

    [
    {
        "property": "attribute_modifier",
        "attribute": "minecraft:generic.max_health",
        "id": "ns:bonus_health",
        "amount": {
            "value": 1,
            "modifiers": [
                { "preset": "ns:difficulty_scaling" }
            ]
        },
        "operation": "add_multiplied_base"
    },
    {
        "property": "attribute_modifier",
        "attribute": "minecraft:generic.movement_speed",
        "id": "ns:movement_speed",
        "amount": {
            "value": 0.10,
            "modifiers": [
                { "preset": "ns:difficulty_scaling" }
            ]
        },
        "operation": "add_multiplied_base"
    }
    ]
    

    This is a quite easy example, but another real example is:
    This is something that will heavily benefit from using presets.
• Fixed summoning via /mpr command applying presets 5 times

6.0.1.3

• Fixed multiple boss bars flickering

6.0.1.2-beta

• Update to latest InsaneLib

6.0.1.1-beta

• Update to latest InsaneLib

6.0.1.0-beta

• Added set_component item function
  • You can set whatever data component you want on an item. The following example from the example data pack will make the target equip an iron ingot that can be eaten and used as a pickaxe. Numeric values can be replaced with #range object to generate random values.

  {
    "property": "equipment",
    "slot": "offhand",
    "items": [
      {
        "item": "minecraft:iron_ingot",
        "functions": [
          {
            "function": "set_component",
            "components": {
              "minecraft:food": {
                "nutrition": {"#range": {"min": 2, "max": 6}},
                "saturation": {"#range": 0.5}
              },
              "minecraft:tool": {
                "rules": [
                  {
                    "blocks": "#mineable/pickaxe",
                    "speed": 6,
                    "correct_for_drops": true
                  }
                ]
              },
              "minecraft:max_damage": 453,
              "minecraft:damage": 0
            }
          },
          {
            "function": "set_drop_chance",
            "drop_chance": 2
          }
        ]
      }
    ]
  }
  

6.0.0.0-alpha

Ported to 1.21.1

Mod support will be added back in the future. Let's see how this goes first.
I've also updated the Example Data Pack which was broken in 1.20.1 too. The only difference between 1.20.1 and 1.21.1 are attribute modifier operations.

Missing

• Set (Raw) NBT for items
• Scaling (pehkui is no longer needed (and seems to no longer work?) as scaling is now an attribute)
• Serene Seasons support
• Game stages (hasn't updated past 1.20.3)