149 lines
4.0 KiB
Markdown
149 lines
4.0 KiB
Markdown
---
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front:
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hard: 入门
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time: 分钟
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---
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# 生物生成
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## 概述
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开发者可以使用原版addon的`spawn_rules`功能控制自定义维度中的生物生成。
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## spawn_rules使用方法
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1.在addon的bevavior目录下新增spawn_rules文件夹
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2.创建一个json文件并命名，如example.json，例子：
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```python
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{
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"format_version": "1.8.0",
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"minecraft:spawn_rules": {
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"description": {
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"identifier": "minecraft:netease_example",
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"population_control": "ambient"
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},
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"conditions": [
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{
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"minecraft:spawns_underground": {},
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"minecraft:brightness_filter": {
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"min": 0,
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"max": 4,
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"adjust_for_weather": true
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},
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"minecraft:height_filter": {
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"min": 0,
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"max": 63
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},
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"minecraft:weight": {
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"default": 10
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},
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"minecraft:herd": {
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"min_size": 2,
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"max_size": 2
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},
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"minecraft:density_limit": {
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"surface": 5
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},
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"minecraft:biome_filter": {
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"test": "has_biome_tag", "operator":"==", "value": "animal"
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}
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}
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]
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}
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}
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```
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description参数解释
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| 参数 | 类型 | 解释 |
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| --- | --- | --- |
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| identifier | str | 该spawn rule的identifier，格式为namespace:name |
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| population_control | str | 生成生物的种类，每一种类都有生成个数的限制，可选的值为：<br>animal<br>monster<br>water_animal<br>villager<br>ambient<br>cat<br>pillager |
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conditions参数解释
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| Name | Description |
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| :-------------------------: | :--------------------: |
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| minecraft:spawns_on_surface | 允许mob在地上生成 |
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| minecraft:spawns_underwater | 允许mob在水里生成 |
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| minecraft:brightness_filter | 允许mob生成的光照条件 |
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| minecraft:weight | mob生成的权重，默认为0 |
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| minecraft:difficulty_filter | mob生成的困难模式 |
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| minecraft:herd | herd的大小 |
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| minecraft:biome_filter | 允许mob生成的biome |
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## 自定义群系的spawn_rules
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利用condition中的minecraft:biome_filter过滤自定义群系的tag，例如群系开发模板自带的dm3等tag，或者其他自定义tag。
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## demo解释
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示例[CustomBiomesMod](../../13-模组SDK编程/60-Demo示例.md#CustomBiomesMod)中，对dm4于dm5两个自定义维度的生物生成做了一些调整。
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- dm4
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使北极熊仅在该维度中生成，不会在其他维度的冰原群系生成。
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1. 在polar_bear的spawn_rules中设置为仅在含dm4标签的群系生成：
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（见customBiomesBehaviorPack/spawn_rules/polar_bear.json）
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```json
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"minecraft:biome_filter": [
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...,
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{"test": "has_biome_tag", "operator":"==", "value": "dm4"}
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]
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```
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- dm5
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在冰原上不会生成兔子，会生成3倍大小的北极熊。
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1. 重写rabbit的spawn_rules，使其不在带dm5标签的群系生成：
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（见customBiomesBehaviorPack/spawn_rules/rabbit.json）
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```json
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"minecraft:biome_filter": {
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"any_of": [
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{
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"all_of": [
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{ "test": "has_biome_tag", "operator":"==", "value": "taiga"},
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{ "test": "has_biome_tag", "operator":"!=", "value": "mega"}
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]
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},
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{
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"all_of": [
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{"test": "is_snow_covered", "operator":"==", "value": true},
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{"test": "has_biome_tag", "operator":"!=", "value": "dm5"} //添加这一句
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]
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},
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{"test": "has_biome_tag", "operator":"==", "value":"desert"}
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]
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}
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```
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2. 新建一个名为neteasebiomes:dm5_polar_bear的自定义生物，除了设置为3倍大小外与原版北极熊一致
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（见customBiomesBehaviorPack/entities/polar_bear.json，及customBiomesResourcePack/entity/dm5_polar_bear.entity.json）
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```json
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"minecraft:scale": {
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"value": 3.0
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},
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```
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然后为其配置spawn_rules，使其仅在dm5中生成
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（见customBiomesBehaviorPack/spawn_rules/dm5_polar_bear.json）
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```python
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"minecraft:biome_filter": [
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... ,
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{"test": "has_biome_tag", "operator":"==", "value": "dm5"}
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]
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```
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