122 lines
2.7 KiB
Markdown
122 lines
2.7 KiB
Markdown
---
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title: 高度图噪声
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category: 巧思案例
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tags:
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- experimental
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- tutorial
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mentions:
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- Apex360
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- SirLich
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---
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# 高度图噪声
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<!--@include: @/wiki/bedrock-wiki-mirror.md-->
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:::tip
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本教程假设您已掌握Molang、特征（feature）及特征规则（feature rule）的基础知识。
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:::
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在本教程中，我们将学习如何通过`q.noise` Molang查询实现基于噪声的地形生成。
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## 单方块特征
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首先定义用于生成地形的单方块特征。本教程将使用石头作为示例。
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::: code-group
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```json [BP/features/stone_feature.json]
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{
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"format_version": "1.13.0",
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"minecraft:single_block_feature": {
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"description": {
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"identifier": "wiki:stone_feature"
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},
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"places_block": "minecraft:stone",
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"enforce_survivability_rules": false,
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"enforce_placement_rules": false
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}
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}
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```
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:::
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## 散布特征
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散布特征（scatter feature）是地形生成的核心组件。
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::: code-group
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```json [BP/features/column.json]
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{
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"format_version": "1.13.0",
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"minecraft:scatter_feature": {
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"description": {
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"identifier": "wiki:column"
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},
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"iterations": "t.height=64+(q.noise(v.originz/64,v.originx/64))*16; return t.height;",
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"places_feature": "wiki:stone_feature",
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"x": 0,
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"z": 0,
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"y": {
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"extent": [-64, "t.height"],
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"distribution": "fixed_grid"
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}
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}
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}
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```
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:::
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**迭代参数解析**：
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- 我们通过临时变量`t.height`定义噪声函数
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- `64`是基准高度（函数的起始高度）
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- `q.noise`查询Perlin噪声值（范围-1到1），除以64用于平滑噪声曲线
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- 乘以16控制地形起伏幅度
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该逻辑通过`y`参数的取值范围[-64, t.height]生成地形柱体。由于`q.noise`基于Perlin噪声算法，相邻柱体高度呈现渐变效果（如64,65,66,68...），而非随机突变。
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## 特征规则
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::: code-group
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```json [BP/feature_rules/column_grid_placement.json]
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{
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"format_version": "1.13.0",
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"minecraft:feature_rules": {
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"description": {
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"identifier": "wiki:column_grid_placement",
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"places_feature": "wiki:column"
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},
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"conditions": {
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"placement_pass": "first_pass",
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"minecraft:biome_filter": {
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"any_of": [
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{
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"test": "has_biome_tag",
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"value": "overworld"
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},
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{
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"test": "has_biome_tag",
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"value": "overworld_generation"
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}
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]
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}
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},
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"distribution": {
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"iterations": 256,
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"x": {
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"extent": [0, 15],
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"distribution": "fixed_grid"
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},
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"y": 0,
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"z": {
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"extent": [0, 15],
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"distribution": "fixed_grid"
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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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**关键配置**：
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- `iterations`设为256以覆盖整个区块（16x16区域）
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- `fixed_grid`分布模式确保柱体均匀排列
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至此，基于噪声的自定义地形已构建完成！您可以自由调整参数进行地形形态实验。 |