314 lines
8.3 KiB
Markdown
314 lines
8.3 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: 进阶
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time: 30分钟
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---
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# 挑战：自定义水上坐骑
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在本节中，我们一起来进行一个挑战，一起来自定义一个水上坐骑。在前面，我们已经制作出了一个非常完善的水鸭实体。目前，我们只需要为这个水鸭实体增加一些允许骑乘的相关组件即可完成挑战。
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## 考查实体行为定义
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我们先考查实体既有的定义文件。我们可以发现，实体中事实上已经有了一个可骑乘组件`minecraft:rideable`。它位于`minecraft:teal_adult`组件组中，内容为：
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```json
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"minecraft:rideable": {
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"family_types": [
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"zombie"
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],
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"seat_count": 1,
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"seats": {
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"position": [
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0,
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0.4,
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0
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]
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}
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}
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```
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我们可以很容易看出，这个组件是用于生成僵尸骑手的。我们只需要对其进行改变即可将其变为同时是用于玩家作为骑手的组件。
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## 修改组件
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我们通过查阅文档、参考其他实体的用法或查看编辑器中该组件的说明，可以轻易将其进行改造：
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```json
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"minecraft:rideable": {
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"family_types": [
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"zombie",
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"player"
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],
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"interact_text": "action.interact.mount",
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"seat_count": 1,
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"seats": {
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"position": [
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0,
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0.4,
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0
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]
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}
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}
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```
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我们可以通过在`family_types`字段中添加族的类型，然后通过`interact_text`来添加一个携带UI的交互按钮文本。这样，我们的水鸭便可以在玩家与其交互时将玩家设为其骑手，从而实现玩家骑乘在水鸭上的功能。
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## 添加组件
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但是，这并不意味着挑战便到此结束。因为目前我们的玩家还无法控制水鸭。我们骑在目前的水鸭上就好比没有萝卜钓竿就骑在猪上一样，无法控制方向，任凭其乱窜。我们需要添加一个控制组件。非常幸运的是，我们恰有一个可以通过方向键或方向按钮来控制实体移动的组件`minecraft:input_ground_controlled`。我们将其加在同样的位置。
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```json
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"minecraft:rideable": {
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"family_types": [
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"zombie",
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"player"
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],
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"interact_text": "action.interact.mount",
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"seat_count": 1,
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"seats": {
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"position": [
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0,
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0.4,
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0
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]
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}
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},
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"minecraft:input_ground_controlled": {}
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```
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这样，我们的水鸭便成为了一个可骑乘可控制同时具备游泳能力的实体了。
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完整的行为包定义代码如下：
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```json
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{
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"format_version": "1.16.0",
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"minecraft:entity": {
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"description": {
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"identifier": "tutorial_demo:teal",
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"runtime_identifier": "minecraft:chicken",
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"is_spawnable": true,
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"is_summonable": true,
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"is_experimental": false
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},
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"component_groups": {
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"minecraft:teal_baby": {
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"minecraft:is_baby": {},
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"minecraft:scale": {
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"value": 0.5
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},
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"minecraft:ageable": {
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"duration": 1200,
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"feed_items": ["wheat_seeds", "beetroot_seeds", "melon_seeds", "pumpkin_seeds"],
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"grow_up": {
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"event": "minecraft:ageable_grow_up",
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"target": "self"
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}
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},
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"minecraft:behavior.follow_parent": {
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"priority": 5,
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"speed_multiplier": 1.1
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}
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},
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"minecraft:teal_adult": {
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"minecraft:experience_reward": {
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"on_bred": "Math.Random(1,7)",
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"on_death": "query.last_hit_by_player?Math.Random(1,3):0"
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},
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"minecraft:loot": {
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"table": "loot_tables/entities/chicken.json"
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},
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"minecraft:breedable": {
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"require_tame": false,
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"breeds_with": {
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"mate_type": "tutorial_demo:teal",
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"baby_type": "tutorial_demo:teal",
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"breed_event": {
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"event": "minecraft:entity_born",
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"target": "baby"
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}
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},
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"breed_items": ["wheat_seeds", "beetroot_seeds", "melon_seeds", "pumpkin_seeds"]
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},
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"minecraft:behavior.breed": {
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"priority": 3,
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"speed_multiplier": 1
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},
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"minecraft:rideable": {
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"family_types": [
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"zombie",
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"player"
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],
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"interact_text": "action.interact.mount",
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"seat_count": 1,
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"seats": {
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"position": [
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0,
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0.4,
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0
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]
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}
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},
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"minecraft:input_ground_controlled": {},
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"minecraft:spawn_entity": {
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"entities": {
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"min_wait_time": 300,
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"max_wait_time": 600,
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"spawn_sound": "plop",
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"spawn_item": "egg",
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"filters": {
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"test": "rider_count",
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"subject": "self",
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"operator": "==",
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"value": 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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"components": {
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"minecraft:type_family": {
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"family": ["chicken", "mob"]
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},
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"minecraft:breathable": {
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"total_supply": 15,
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"suffocate_time": 0
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},
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"minecraft:collision_box": {
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"width": 0.6,
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"height": 0.8
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},
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"minecraft:nameable": {},
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"minecraft:health": {
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"value": 4,
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"max": 4
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},
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"minecraft:hurt_on_condition": {
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"damage_conditions": [
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{
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"filters": {
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"test": "in_lava",
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"subject": "self",
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"operator": "==",
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"value": true
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},
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"cause": "lava",
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"damage_per_tick": 4
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}
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]
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},
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"minecraft:movement": {
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"value": 0.25
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},
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"minecraft:damage_sensor": {
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"triggers": {
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"cause": "fall",
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"deals_damage": false
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}
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},
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"minecraft:leashable": {
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"soft_distance": 4,
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"hard_distance": 6,
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"max_distance": 10
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},
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"minecraft:balloonable": {
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"mass": 0.5
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},
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"minecraft:navigation.walk": {
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"can_path_over_water": true,
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"can_sink": false,
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"avoid_damage_blocks": true
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},
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"minecraft:movement.basic": {},
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"minecraft:jump.static": {},
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"minecraft:can_climb": {},
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"minecraft:despawn": {
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"despawn_from_distance": {}
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},
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"minecraft:behavior.rise_to_liquid_level": {
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"priority": 0,
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"liquid_y_offset": -0.5,
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"rise_delta": 0.01,
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"sink_delta": 0.01
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},
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"minecraft:behavior.panic": {
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"priority": 1,
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"speed_multiplier": 1.5
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},
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"minecraft:behavior.mount_pathing": {
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"priority": 2,
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"speed_multiplier": 1.5,
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"target_dist": 0,
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"track_target": true
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},
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"minecraft:behavior.tempt": {
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"priority": 4,
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"speed_multiplier": 1,
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"items": ["wheat_seeds", "beetroot_seeds", "melon_seeds", "pumpkin_seeds"]
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},
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"minecraft:behavior.random_stroll": {
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"priority": 6,
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"speed_multiplier": 1
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},
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"minecraft:behavior.look_at_player": {
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"priority": 7,
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"look_distance": 6,
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"probability": 0.02
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},
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"minecraft:behavior.random_look_around": {
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"priority": 8
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},
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"minecraft:physics": {},
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"minecraft:pushable": {
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"is_pushable": true,
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"is_pushable_by_piston": true
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},
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"minecraft:conditional_bandwidth_optimization": {}
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},
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"events": {
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"from_egg": {
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"add": {
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"component_groups": ["minecraft:teal_baby"]
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}
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},
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"minecraft:entity_spawned": {
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"randomize": [
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{
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"weight": 95,
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"trigger": "minecraft:spawn_adult"
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},
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{
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"weight": 5,
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"add": {
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"component_groups": ["minecraft:teal_baby"]
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}
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}
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]
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},
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"minecraft:entity_born": {
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"remove": {},
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"add": {
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"component_groups": ["minecraft:teal_baby"]
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}
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},
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"minecraft:ageable_grow_up": {
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"remove": {
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"component_groups": ["minecraft:teal_baby"]
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},
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"add": {
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"component_groups": ["minecraft:teal_adult"]
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}
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},
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"minecraft:spawn_adult": {
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"add": {
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"component_groups": ["minecraft:teal_adult"]
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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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