154 lines
4.0 KiB
Markdown
154 lines
4.0 KiB
Markdown
---
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front: https://nie.res.netease.com/r/pic/20211104/69055361-2e7a-452f-8b1a-f23e1262a03a.jpg
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hard: 高级
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time: 10分钟
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---
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# 了解加权随机特征规则
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加权随机特征可以用于按比重生成多种特征。我们使用加权随机特征来生成一些各种样式的水井。
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## 使用编辑器导出多种水井结构
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我们在地图编辑器中制作多种水井，并将其导出。导出的结构会自动进入行为包的`structures/<namespace>`文件夹中。这里，由于我们在编辑器中设置的命名空间为`tutorial_demo`，我们的结构会放置于`structures/tutorial_demo`文件夹中。
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## 使用结构特征配置水井
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我们使用中国版的结构特征来制作四种水井的特征。
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```json
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{
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"format_version": "1.14.0",
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"netease:structure_feature": {
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"description": {
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"identifier": "tutorial_demo:woodwell_structure_feature"
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},
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"places_structure": "tutorial_demo:woodwell"
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}
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}
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```
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```json
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{
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"format_version": "1.14.0",
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"netease:structure_feature": {
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"description": {
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"identifier": "tutorial_demo:stonewell_structure_feature"
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},
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"places_structure": "tutorial_demo:stonewell"
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}
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}
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```
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```json
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{
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"format_version": "1.14.0",
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"netease:structure_feature": {
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"description": {
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"identifier": "tutorial_demo:cobblestonewell_structure_feature"
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},
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"places_structure": "tutorial_demo:cobblestonewell"
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}
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}
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```
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```json
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{
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"format_version": "1.14.0",
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"netease:structure_feature": {
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"description": {
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"identifier": "tutorial_demo:stonebrickswell_structure_feature"
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},
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"places_structure": "tutorial_demo:stonebrickswell"
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}
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}
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```
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由于我们的结构位于`tutorial_demo`文件夹中，因此命名空间是`tutorial_demo`。我们将其挂接到`places_structure`中，即可实现结构特征的制作。
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## 使用加权随机特征分配水井权重
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我们新建`random_well_feature.json`文件：
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```json
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{
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"format_version": "1.13.0",
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"minecraft:weighted_random_feature": {
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"description": {
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"identifier": "tutorial_demo:random_well_feature"
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},
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"features": [
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["tutorial_demo:woodwell_structure_feature", 1],
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["tutorial_demo:stonewell_structure_feature", 1],
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["tutorial_demo:cobblestonewell_structure_feature", 1],
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["tutorial_demo:stonebrickswell_structure_feature", 1]
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]
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}
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}
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```
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我们将所有水井的权重设置为1，这样每个水井都有$\frac{1}{1+1+1+1}=\frac{1}{4}$的概率生成。当选中的水井成功生成时该特征会判定成功，否则就会判定失败。
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## 挂接特征规则
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我们创建`overworld_well_structure_feature.json`文件，并写入如下：
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```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": "tutorial_demo:overworld_well_structure_feature",
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"places_feature": "tutorial_demo:random_well_feature"
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},
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"conditions": {
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"placement_pass": "surface_pass",
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"minecraft:biome_filter": [
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{
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"any_of": [
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{
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"test": "has_biome_tag",
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"operator": "==",
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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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"operator": "==",
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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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},
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"distribution": {
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"iterations": 1,
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"x": {
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"distribution": "uniform",
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"extent": [
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0,
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16
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]
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},
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"y": "query.heightmap(variable.worldx, variable.worldz)-3",
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"z": {
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"distribution": "uniform",
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"extent": [
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0,
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16
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]
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},
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"scatter_chance": 100
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}
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}
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}
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```
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我们可以看到，水井特征如期生成了。
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当然，虽然我们的特征规则设置为了每个区块放置一次加权随机特征，但是也是有几率出现这种三联水井的情况的。这代表我们的特征放置非常成功！ |