# 开始添加作物方块
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：
- 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
- 部分农作物可收获多次
- 特殊农作物需要种植在篱笆上
# 设定农作物不同阶段的生长状态
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；
{
"format_version": "1.16.100",
"minecraft:block": {
"description": {
"identifier": "farm:whiteradish",
"register_to_creative_menu": true
},
"permutations": [
],
"events": {
},
"components": {
"minecraft:placement_filter": { //可以放在耕地上
"conditions": [
{
"allowed_faces": ["up"],
"block_filter": ["farmland"]
}
]
},
"minecraft:entity_collision": false, //关闭生物碰撞箱
"minecraft:pick_collision": { //设定选择时的碰撞箱
"origin": [-8, 0, -8],
"size": [16, 5, 16]
},
"minecraft:geometry": "geometry.whiteradish_stage_0", //方块模型
"minecraft:material_instances": { //方块的贴图和渲染方法
"*": {
"texture": "farm:whiteradish_stage_0",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
}
}
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；
{
"format_version": "1.16.100",
"minecraft:block": {
"description": {
"identifier": "farm:whiteradish",
"register_to_creative_menu": true,
"properties": {
"farm:age": [0, 1, 2] //设定农作物共有三个生长阶段
}
},
"permutations": [
{
"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
"components": { //满足上方的条件，将下方组件添加到方块中
"minecraft:loot": "loot_tables/empty.json",
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 5, 16]
},
"minecraft:geometry": "geometry.whiteradish_stage_0",
"minecraft:block_light_absorption": 0,
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_0",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
}
],
"components": {
"minecraft:placement_filter": {
"conditions": [
{
"allowed_faces": ["up"],
"block_filter": ["farmland"]
}
]
},
"minecraft:entity_collision": false,
"minecraft:on_player_placing": { //触发器，玩家放置方块时触发事件
"event": "farm:on_player_placing",
"target": "self"
}
},
"events": {
"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
"set_block_property": {
"farm:age": 0
}
}
}
}
}
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；
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；
{
"format_version": "1.16.100",
"minecraft:block": {
"description": {
"identifier": "farm:whiteradish",
"register_to_creative_menu": true,
"properties": {
"farm:age": [0, 1, 2],
"farm:growth": [0, 1, 2, 3, 4, 5] //生长刻数，每次随机刻触发时都会+1
}
},
"permutations": [
{
"condition": "query.block_property('farm:age') == 0",
"components": {
"minecraft:loot": "loot_tables/empty.json",
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 5, 16]
},
"minecraft:random_ticking": { //添加随机刻的触发器，触发下方事件
"on_tick": {
"target": "self",
"event": "farm:on_age_count_0" //触发的事件
}
},
"minecraft:geometry": "geometry.whiteradish_stage_0",
"minecraft:block_light_absorption": 0,
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_0",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
}
],
"components": {···},
"events": {
"farm:on_age_count_0": { //上方添加的随机刻触发器触发时，响应此事件
"sequence": [
{
"condition": "query.block_property('farm:growth') < 2", //条件，当farm:growth属性小于2时
"set_block_property": {
"farm:growth": "query.block_property('farm:growth') + 1" //设定方块的属性farm:growth加1
}
},
{
"condition": "query.block_property('farm:growth') == 2", //条件，当farm:growth属性等于2时
"trigger": {
"event": "farm:on_whiteradish_grow_to_1", //触发新的事件
"target": "self"
}
}
]
},
"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）
"set_block_property": {
"farm:age": 1, //设定方块的属性farm:age为1（成长到新的阶段）
"farm:growth": 0 //设定方块的属性farm:growth为0（重置随机刻）
}
},
"farm:on_player_placing": {
"set_block_property": {
"farm:age": 0
}
}
}
}
}
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；
{
"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
"components": {
"minecraft:loot": "loot_tables/empty.json",
"minecraft:geometry": "geometry.whiteradish_stage_0", //若有不同的模型需要修改
"minecraft:block_light_absorption": 0,
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 8, 16]
},
"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
"on_tick": {
"target": "self",
"event": "farm:on_age_count_1"
}
},
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_1", //若有不同的贴图需要修改
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
}
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。
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：
{
"format_version": "1.16.100",
"minecraft:block": {
"description": {
"identifier": "farm:whiteradish",
"register_to_creative_menu": true,
"properties": {
"farm:age": [0, 1, 2],
"farm:growth": [0, 1, 2, 3, 4, 5]
}
},
"permutations": [
{
"condition": "query.block_property('farm:age') == 0",
"components": {
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 5, 16]
},
"minecraft:random_ticking": {
"on_tick": {
"target": "self",
"event": "farm:on_age_count_0"
}
},
"minecraft:geometry": "geometry.whiteradish_stage_0",
"minecraft:block_light_absorption": 0,
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_0",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
},
{
"condition": "query.block_property('farm:age') == 1",
"components": {
"minecraft:geometry": "geometry.whiteradish_stage_0",
"minecraft:block_light_absorption": 0,
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 8, 16]
},
"minecraft:random_ticking": {
"on_tick": {
"target": "self",
"event": "farm:on_age_count_1"
}
},
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_1",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
},
{
"condition": "query.block_property('farm:age') == 2",
"components": {
"minecraft:geometry": "geometry.whiteradish_stage_2",
"minecraft:block_light_absorption": 0,
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 12, 16]
},
"minecraft:on_player_destroyed": {
"event": "farm:on_destroy_stage_2"
},
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_2",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
}
],
"events": {
"farm:on_age_count_0": {
"sequence": [
{
"condition": "query.block_property('farm:growth') < 2",
"set_block_property": {
"farm:growth": "query.block_property('farm:growth') + 1"
}
},
{
"condition": "query.block_property('farm:growth') == 2",
"trigger": {
"event": "farm:on_whiteradish_grow_to_1",
"target": "self"
}
}
]
},
"farm:on_age_count_1": {
"sequence": [
{
"condition": "query.block_property('farm:growth') < 5",
"set_block_property": {
"farm:growth": "query.block_property('farm:growth') + 1"
}
},
{
"condition": "query.block_property('farm:growth') == 5",
"trigger": {
"event": "farm:on_whiteradish_grow_to_2",
"target": "self"
}
}
]
},
"farm:on_player_placing": {
"set_block_property": {
"farm:age": 0,
"farm:growth": 0
}
},
"farm:on_whiteradish_grow_to_1": {
"set_block_property": {
"farm:age": 1,
"farm:growth": 0
}
},
"farm:on_whiteradish_grow_to_2": {
"set_block_property": {
"farm:age": 2,
"farm:growth": 0
}
}
},
"components": {
"minecraft:placement_filter": {
"conditions": [
{
"allowed_faces": ["up"],
"block_filter": ["farmland"]
}
]
},
"minecraft:entity_collision": false,
"minecraft:on_player_placing": {
"event": "farm:on_player_placing",
"target": "self"
}
}
}
}
# 继续完善农作物方块
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；
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。
{
"format_version": "1.16.100",
"minecraft:item": {
"description": {
"identifier": "farm:whiteradish_seed",
"category": "items"
},
"components": {
"minecraft:icon": {
"texture": "farm:whiteradish_seed"
},
"minecraft:ignores_permission": true,
"minecraft:block_placer": { //设定此物品可以放置方块
"block": "farm:whiteradish",
"use_block_description": true
}
}
}
}
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！
{
"condition": "query.block_property('farm:age') == 2",
"components": {
"minecraft:loot": "loot_tables/whiteradish.json", //掉落物表路径
"minecraft:geometry": "geometry.whiteradish_stage_2",
"minecraft:block_light_absorption": 0,
"minecraft:pick_collision": {
"origin": [-8, 0, -8],
"size": [16, 12, 16]
},
"minecraft:on_player_destroyed": {
"event": "farm:on_destroy_stage_2"
},
"minecraft:material_instances": {
"*": {
"texture": "farm:whiteradish_stage_2",
"render_method": "alpha_test",
"ambient_occlusion": false
}
}
}
}
https://nie.res.netease.com/r/pic/20210730/ee109f39-8987-46e0-9fe7-40ebb23060fa.png
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