452 lines
15 KiB
Markdown
452 lines
15 KiB
Markdown
---
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front: https://nie.res.netease.com/r/pic/20210730/ee109f39-8987-46e0-9fe7-40ebb23060fa.png
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hard: 进阶
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time: 40分钟
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---
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# 开始添加作物方块
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基本了解新的自定义方块写法后，我们开始制作地图中需要的农作物：
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- 农作物有多个生长状态，并且模型和贴图会随着成长而变化
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- 部分农作物可收获多次
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- 特殊农作物需要种植在篱笆上
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<iframe src="https://cc.163.com/act/m/daily/iframeplayer/?id=6152ba9148e27490891f035c" height="600" width="800" allow="fullscreen" />
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## 设定农作物不同阶段的生长状态
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首先，我们给自定义方块添加基本的行为组件，使其可以在游戏中正常显示出来；
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```json
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{
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"format_version": "1.16.100",
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"minecraft:block": {
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"description": {
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"identifier": "farm:whiteradish"
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},
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"permutations": [
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],
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"events": {
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},
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"components": {
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"minecraft:placement_filter": { //可以放在耕地上
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"conditions": [
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{
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"allowed_faces": ["up"],
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"block_filter": ["farmland"]
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}
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]
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},
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"minecraft:entity_collision": false, //关闭生物碰撞箱
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"minecraft:pick_collision": { //设定选择时的碰撞箱
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"origin": [-8, 0, -8],
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"size": [16, 5, 16]
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},
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"minecraft:geometry": "geometry.whiteradish_stage_0", //方块模型
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"minecraft:material_instances": { //方块的贴图和渲染方法
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"*": {
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"texture": "farm:whiteradish_stage_0",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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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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接下来，我们为其添加方块属性，并且利用触发器、事件和组合设定在不同属性的情况下，方块也会有明显的变化；
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```json
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{
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"format_version": "1.16.100",
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"minecraft:block": {
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"description": {
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"identifier": "farm:whiteradish",
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"properties": {
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"farm:age": [0, 1, 2] //设定农作物共有三个生长阶段
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}
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},
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"permutations": [
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{
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"condition": "query.block_property('farm:age') == 0", //组合的条件表达式，当方块属性farm:age等于0时
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"components": { //满足上方的条件，将下方组件添加到方块中
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"minecraft:loot": "loot_tables/empty.json",
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 5, 16]
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},
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"minecraft:geometry": "geometry.whiteradish_stage_0",
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"minecraft:block_light_absorption": 0,
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_0",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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}
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],
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"components": {
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"minecraft:placement_filter": {
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"conditions": [
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{
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"allowed_faces": ["up"],
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"block_filter": ["farmland"]
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}
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]
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},
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"minecraft:entity_collision": false,
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"minecraft:on_player_placing": { //触发器，玩家放置方块时触发事件
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"event": "farm:on_player_placing",
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"target": "self"
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}
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},
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"events": {
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"farm:on_player_placing": { //当玩家放置方块时触发此事件，设定方块的生长阶段为0
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"set_block_property": {
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"farm:age": 0
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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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根据上方图片可以看出，主要分为四个部分，属性、组合、基础组件、事件；这四个部分相互调配，非常灵活；
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再添加一个属性，控制农作物的生长刻数，组合中添加随机刻的触发器，使方块可以根据随机刻触发事件，达到农作物生长的目的；
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```json
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{
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"format_version": "1.16.100",
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"minecraft:block": {
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"description": {
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"identifier": "farm:whiteradish",
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"properties": {
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"farm:age": [0, 1, 2],
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"farm:growth": [0, 1, 2, 3, 4, 5] //生长刻数，每次随机刻触发时都会+1
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}
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},
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"permutations": [
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{
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"condition": "query.block_property('farm:age') == 0",
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"components": {
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"minecraft:loot": "loot_tables/empty.json",
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 5, 16]
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},
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"minecraft:random_ticking": { //添加随机刻的触发器，触发下方事件
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"on_tick": {
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"target": "self",
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"event": "farm:on_age_count_0" //触发的事件
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}
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},
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"minecraft:geometry": "geometry.whiteradish_stage_0",
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"minecraft:block_light_absorption": 0,
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_0",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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}
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],
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"components": {···},
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"events": {
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"farm:on_age_count_0": { //上方添加的随机刻触发器触发时，响应此事件
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"sequence": [
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{
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"condition": "query.block_property('farm:growth') < 2", //条件，当farm:growth属性小于2时
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"set_block_property": {
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"farm:growth": "query.block_property('farm:growth') + 1" //设定方块的属性farm:growth加1
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}
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},
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{
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"condition": "query.block_property('farm:growth') == 2", //条件，当farm:growth属性等于2时
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"trigger": {
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"event": "farm:on_whiteradish_grow_to_1", //触发新的事件
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"target": "self"
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}
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}
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]
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},
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"farm:on_whiteradish_grow_to_1": { //当farm:growth属性等于2时触发的事件（说明此时随机刻已经触发了3次）
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"set_block_property": {
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"farm:age": 1, //设定方块的属性farm:age为1（成长到新的阶段）
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"farm:growth": 0 //设定方块的属性farm:growth为0（重置随机刻）
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}
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},
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"farm:on_player_placing": {
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"set_block_property": {
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"farm:age": 0
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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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农作物的生长阶段到1后，条件是farm:age等于0的组合就失效了，所以我们需要添加新的组合表示农作物的新阶段，并且需要在组合中修改模型和贴图使农作物在到达新阶段时有所变化；
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```json
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{
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"condition": "query.block_property('farm:age') == 1", //新添加的组合，条件是农作物的生长阶段等于1时
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"components": {
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"minecraft:loot": "loot_tables/empty.json",
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"minecraft:geometry": "geometry.whiteradish_stage_0", //若有不同的模型需要修改
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"minecraft:block_light_absorption": 0,
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 8, 16]
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},
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"minecraft:random_ticking": { //因为农作物还没有完全成熟，所以仍需要随机刻的触发器
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"on_tick": {
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"target": "self",
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"event": "farm:on_age_count_1"
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}
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},
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_1", //若有不同的贴图需要修改
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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}
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```
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现在，农作物方块已经可以生长了，我们在编辑器中点击**开发测试**进入到游戏中测试一下。
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成长阶段像0到1一样，继续添加从1-2的组合和事件，这样，一个较完整的农作物方块就完成了：
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```json
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{
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"format_version": "1.16.100",
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"minecraft:block": {
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"description": {
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"identifier": "farm:whiteradish",
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"properties": {
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"farm:age": [0, 1, 2],
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"farm:growth": [0, 1, 2, 3, 4, 5]
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}
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},
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"permutations": [
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{
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"condition": "query.block_property('farm:age') == 0",
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"components": {
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 5, 16]
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},
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"minecraft:random_ticking": {
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"on_tick": {
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"target": "self",
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"event": "farm:on_age_count_0"
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}
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},
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"minecraft:geometry": "geometry.whiteradish_stage_0",
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"minecraft:block_light_absorption": 0,
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_0",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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},
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{
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"condition": "query.block_property('farm:age') == 1",
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"components": {
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"minecraft:geometry": "geometry.whiteradish_stage_0",
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"minecraft:block_light_absorption": 0,
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 8, 16]
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},
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"minecraft:random_ticking": {
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"on_tick": {
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"target": "self",
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"event": "farm:on_age_count_1"
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}
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},
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_1",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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},
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{
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"condition": "query.block_property('farm:age') == 2",
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"components": {
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"minecraft:geometry": "geometry.whiteradish_stage_2",
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"minecraft:block_light_absorption": 0,
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 12, 16]
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},
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"minecraft:on_player_destroyed": {
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"event": "farm:on_destroy_stage_2"
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},
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_2",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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}
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],
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"events": {
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"farm:on_age_count_0": {
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"sequence": [
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{
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"condition": "query.block_property('farm:growth') < 2",
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"set_block_property": {
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"farm:growth": "query.block_property('farm:growth') + 1"
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}
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},
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{
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"condition": "query.block_property('farm:growth') == 2",
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"trigger": {
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"event": "farm:on_whiteradish_grow_to_1",
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"target": "self"
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}
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}
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]
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},
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"farm:on_age_count_1": {
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"sequence": [
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{
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"condition": "query.block_property('farm:growth') < 5",
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"set_block_property": {
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"farm:growth": "query.block_property('farm:growth') + 1"
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}
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},
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{
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"condition": "query.block_property('farm:growth') == 5",
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"trigger": {
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"event": "farm:on_whiteradish_grow_to_2",
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"target": "self"
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}
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}
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]
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},
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"farm:on_player_placing": {
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"set_block_property": {
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"farm:age": 0,
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"farm:growth": 0
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}
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},
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"farm:on_whiteradish_grow_to_1": {
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"set_block_property": {
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"farm:age": 1,
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"farm:growth": 0
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}
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},
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"farm:on_whiteradish_grow_to_2": {
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"set_block_property": {
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"farm:age": 2,
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"farm:growth": 0
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}
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}
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},
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"components": {
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"minecraft:placement_filter": {
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"conditions": [
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{
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"allowed_faces": ["up"],
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"block_filter": ["farmland"]
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}
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]
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},
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"minecraft:entity_collision": false,
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"minecraft:on_player_placing": {
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"event": "farm:on_player_placing",
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"target": "self"
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}
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}
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}
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}
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```
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## 继续完善农作物方块
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现在，我们已经有了农作物方块，不过还不够完整，没有农作物对应的果实和种下农作物需要的种子，我们来添加这些；
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首先是种子，创建一个自定义物品，添加一个放置方块的组件即可。
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```json
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{
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"format_version": "1.16.100",
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"minecraft:item": {
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"description": {
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"identifier": "farm:whiteradish_seed",
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"category": "items"
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},
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"components": {
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"minecraft:icon": {
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"texture": "farm:whiteradish_seed"
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},
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"minecraft:ignores_permission": true,
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"minecraft:block_placer": { //设定此物品可以放置方块
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"block": "farm:whiteradish",
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"use_block_description": true
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}
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}
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}
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}
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```
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农作物的掉落物也很简单，只需要在农作物成熟的组合中添加一个掉落物表即可！
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```json
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{
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"condition": "query.block_property('farm:age') == 2",
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"components": {
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"minecraft:loot": "loot_tables/whiteradish.json", //掉落物表路径
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"minecraft:geometry": "geometry.whiteradish_stage_2",
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"minecraft:block_light_absorption": 0,
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"minecraft:pick_collision": {
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"origin": [-8, 0, -8],
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"size": [16, 12, 16]
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},
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"minecraft:on_player_destroyed": {
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"event": "farm:on_destroy_stage_2"
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},
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"minecraft:material_instances": {
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"*": {
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"texture": "farm:whiteradish_stage_2",
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"render_method": "alpha_test",
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"ambient_occlusion": false
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}
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}
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}
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}
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```
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<img src="./images/17.gif" alt="17" style="zoom:115%;" />
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