MCmod制作 1.11(6.动态物品贴图) - 编程开发

zkm00323

加特效,加特技Duang!Duang!Duang!
记得原版了有2个物品的贴图会不断改变
钟和指南针,今天就是参考这两个物品的代码写的

1.给proxy新的功能
我们先来了解一下有哪些方法可以只让单边读取

点击图片查看原网址

但如果有要写在物品的构造函数里的单边函数,以上的方法都行不通
所以我们要自己创造一个方法
在CommonProxy里新建一个方法
public interface CommonProxy {
      public void init();

      abstract public boolean isServerSider();
}

abstract表示必须要重写这个方法

之后再ClientProxy里添加这个方法
      @Override
      public boolean isServerSider() {
            return false;
      }

ServerProxy里也要
      @Override
      public boolean isServerSider() {
            return true;
      }

2.研究动态贴图
好接下来我们看一下ItemClock和ItemCompass
有什么共同的东西

他们都有this.addPropertyOverride(new ResourceLocation("xxxx"), new IItemPropertyGetter(){
      ...
      public float apply(ItemStack stack, @Nullable World worldIn, @Nullable EntityLivingBase entityIn){
               ...
      }
}
注意new ResourceLocation("angle")里面的参数名
呢我们看一下 IItemPropertyGetter()里是什么

所以 IItemPropertyGetter(){后面的 public float apply()应该就是直接实现了这个方法,注意到这个方法的回传是一个float

然后我们去看看ItemCompass的json文件

我们打开 compass.json
{
"parent": "item/generated",
"textures": {
      "layer0": "items/compass_16"
},
"overrides": [
      { "predicate": { "angle": 0.000000 }, "model": "item/compass" },
      { "predicate": { "angle": 0.015625 }, "model": "item/compass_17" },
      { "predicate": { "angle": 0.046875 }, "model": "item/compass_18" },
      { "predicate": { "angle": 0.078125 }, "model": "item/compass_19" },
      { "predicate": { "angle": 0.109375 }, "model": "item/compass_20" },
      { "predicate": { "angle": 0.140625 }, "model": "item/compass_21" },
      { "predicate": { "angle": 0.171875 }, "model": "item/compass_22" },
      { "predicate": { "angle": 0.203125 }, "model": "item/compass_23" },
      { "predicate": { "angle": 0.234375 }, "model": "item/compass_24" },
      { "predicate": { "angle": 0.265625 }, "model": "item/compass_25" },
      { "predicate": { "angle": 0.296875 }, "model": "item/compass_26" },
      { "predicate": { "angle": 0.328125 }, "model": "item/compass_27" },
      { "predicate": { "angle": 0.359375 }, "model": "item/compass_28" },
      { "predicate": { "angle": 0.390625 }, "model": "item/compass_29" },
      { "predicate": { "angle": 0.421875 }, "model": "item/compass_30" },
      { "predicate": { "angle": 0.453125 }, "model": "item/compass_31" },
      { "predicate": { "angle": 0.484375 }, "model": "item/compass_00" },
      { "predicate": { "angle": 0.515625 }, "model": "item/compass_01" },
      { "predicate": { "angle": 0.546875 }, "model": "item/compass_02" },
      { "predicate": { "angle": 0.578125 }, "model": "item/compass_03" },
      { "predicate": { "angle": 0.609375 }, "model": "item/compass_04" },
      { "predicate": { "angle": 0.640625 }, "model": "item/compass_05" },
      { "predicate": { "angle": 0.671875 }, "model": "item/compass_06" },
      { "predicate": { "angle": 0.703125 }, "model": "item/compass_07" },
      { "predicate": { "angle": 0.734375 }, "model": "item/compass_08" },
      { "predicate": { "angle": 0.765625 }, "model": "item/compass_09" },
      { "predicate": { "angle": 0.796875 }, "model": "item/compass_10" },
      { "predicate": { "angle": 0.828125 }, "model": "item/compass_11" },
      { "predicate": { "angle": 0.859375 }, "model": "item/compass_12" },
      { "predicate": { "angle": 0.890625 }, "model": "item/compass_13" },
      { "predicate": { "angle": 0.921875 }, "model": "item/compass_14" },
      { "predicate": { "angle": 0.953125 }, "model": "item/compass_15" },
      { "predicate": { "angle": 0.984375 }, "model": "item/compass" }
]
}

不难发现"angle"就是上面打在this.addPropertyOverride()里面的参数
而这些0.625526的数字就是apply的回传值,用此值判断所在区间
0.000000~0.015624就跑去读取 "model": "item/compass"
0.015625~0.046874就派去读取 "model": "item/compass_17"
...

3.自制动态贴图
好既然我们已经知道动态贴图的秘密了我们就自己做一个吧
在compass里的apply方法,官方在每一个变数和和方法上面加上
@SideOnly(Side.CLIENT)注解来实现单边读取,而我们可以用之前做的proxy判断法来实现

现在我们回到ItemBloodsave的构造函数里添加一句
      public ItemBloodsave(){
            setUnlocalizedName("itembloodsave");
            setRegistryName("itembloodsave");
            setCreativeTab(CreativeTabs.MATERIALS);
            setMaxStackSize(1);

            if(!Main.proxy.isServerSider())this.addPropertyOverride(new ResourceLocation("bloodsave"), new ItemBloodsaveTextures());
      }

这样只有客户端会执行此句话
我们设定参数名为"bloodsave"
new 一个 ItemBloodsaveTextures()这里我们还没创建会报错

我们现在来创建ItemBloodsaveTextures()

在ItemBloodsaveTextures里输入
public class ItemBloodsaveTextures implements IItemPropertyGetter{
      @Override
      public float apply(ItemStack stack, World worldIn, EntityLivingBase entityIn) {
            if(worldIn == null && entityIn != null)
                     worldIn = entityIn.getEntityWorld();//玩家背包內的物品沒有世界
         if (worldIn != null && stack.getTagCompound() != null && stack.getTagCompound().hasKey("blood")){//阻擋創造模式物品欄
                     return stack.getTagCompound().getInteger("bloodsave");
      }
            return 0;
      }
}

这里我来解释一下,apply是每一个ItemBloodsave,不管在地上,手里,箱子里,玩家物品栏里,创造模式物品栏里,
每一tick都会执行一次(20tick=1sec)
经过我的测试,在不同地方的物品的输入值也不一样
玩家物品栏 worldIn == null,entityIn != null
地上 worldIn != null,entityIn == null
手里 worldIn != null,entityIn != null
创造模式物品栏 worldIn == null,entityIn == null

我们的物品必须被玩家右击以后才有nbt资料
而创造模式物品栏里的item是不可能有nbt资料的,如果硬要去读取则会崩溃
所以以上代码让还没有nbt的血瓶以及创造模式物品栏内的血瓶回传值为0
其他则读取nbt资料来回传1~20

接下来就剩下json文件和把贴图放进去了
我们回到models.item.itembloodsave.json里改写
{
"parent": "item/generated",
"textures": {
      "layer0": "soa:items/itembloodsave"
},
  "overrides": [
{ "predicate": { "bloodsave": 0 },  "model": "soa:item/itembloodsave" },
{ "predicate": { "bloodsave": 1 },  "model": "soa:item/itembloodsave_1"  },
{ "predicate": { "bloodsave": 8 }, "model": "soa:item/itembloodsave_2" },
{ "predicate": { "bloodsave": 13 }, "model": "soa:item/itembloodsave_3" },
{ "predicate": { "bloodsave": 20 }, "model": "soa:item/itembloodsave_4" }
  ]
}

apply回传值↓
0→"model": "soa:item/itembloodsave"
1~7→"model": "soa:item/itembloodsave_1"
8~12→"model": "soa:item/itembloodsave_2"
13~19→ "model": "soa:item/itembloodsave_3"
20→"model": "soa:item/itembloodsave_4"

再来把1,2,3,4models补上

我就写itembloodsave_1.json的内容吧
{
"parent": "item/generated",
"textures": {
"layer0": "soa:items/itembloodsave_1"
}
}

"layer0": "soa:items/itembloodsave_1"就是导向的贴图文件路径我之前也说过了
其他的json只是导向不同的贴图文件路径而已我就不写出来了

附上贴图文件,应该知道要丢哪里了吧(textures.items里)

itembloodsave_1

itembloodsave_2

itembloodsave_3

itembloodsave_4

好我们进游戏看看

好,物品的高级玩法似乎就剩多态没讲了我
也是尽量希望做一个实用,并且可以把教程融合在一起的物品
不知道这个血瓶你喜不喜欢呢~

源代码

src_教程6.rar (10.5 KB, 下载次数: 29)

2021.12 数据，可能有更多内容

点击图片查看原网址

但如果有要写在物品的构造函数里的单边函数,以上的方法都行不通
所以我们要自己创造一个方法
在CommonProxy里新建一个方法
public interface CommonProxy {
public void init();

abstract public boolean isServerSider();
}

abstract表示必须要重写这个方法

之后再ClientProxy里添加这个方法
@Override
public boolean isServerSider() {
return false;
}

ServerProxy里也要
@Override
public boolean isServerSider() {
return true;
}

2.研究动态贴图
好接下来我们看一下ItemClock和ItemCompass
有什么共同的东西

他们都有this.addPropertyOverride(new ResourceLocation("xxxx"), new IItemPropertyGetter(){
...
public float apply(ItemStack stack, @Nullable World worldIn, @Nullable EntityLivingBase entityIn){
...
}
}
注意new ResourceLocation("angle")里面的参数名
呢我们看一下 IItemPropertyGetter()里是什么

所以 IItemPropertyGetter(){后面的 public float apply()应该就是直接实现了这个方法,注意到这个方法的回传是一个float

然后我们去看看ItemCompass的json文件

我们打开 compass.json
{
"parent": "item/generated",
"textures": {
"layer0": "items/compass_16"
},
"overrides": [
{ "predicate": { "angle": 0.000000 }, "model": "item/compass" },
{ "predicate": { "angle": 0.015625 }, "model": "item/compass_17" },
{ "predicate": { "angle": 0.046875 }, "model": "item/compass_18" },
{ "predicate": { "angle": 0.078125 }, "model": "item/compass_19" },
{ "predicate": { "angle": 0.109375 }, "model": "item/compass_20" },
{ "predicate": { "angle": 0.140625 }, "model": "item/compass_21" },
{ "predicate": { "angle": 0.171875 }, "model": "item/compass_22" },
{ "predicate": { "angle": 0.203125 }, "model": "item/compass_23" },
{ "predicate": { "angle": 0.234375 }, "model": "item/compass_24" },
{ "predicate": { "angle": 0.265625 }, "model": "item/compass_25" },
{ "predicate": { "angle": 0.296875 }, "model": "item/compass_26" },
{ "predicate": { "angle": 0.328125 }, "model": "item/compass_27" },
{ "predicate": { "angle": 0.359375 }, "model": "item/compass_28" },
{ "predicate": { "angle": 0.390625 }, "model": "item/compass_29" },
{ "predicate": { "angle": 0.421875 }, "model": "item/compass_30" },
{ "predicate": { "angle": 0.453125 }, "model": "item/compass_31" },
{ "predicate": { "angle": 0.484375 }, "model": "item/compass_00" },
{ "predicate": { "angle": 0.515625 }, "model": "item/compass_01" },
{ "predicate": { "angle": 0.546875 }, "model": "item/compass_02" },
{ "predicate": { "angle": 0.578125 }, "model": "item/compass_03" },
{ "predicate": { "angle": 0.609375 }, "model": "item/compass_04" },
{ "predicate": { "angle": 0.640625 }, "model": "item/compass_05" },
{ "predicate": { "angle": 0.671875 }, "model": "item/compass_06" },
{ "predicate": { "angle": 0.703125 }, "model": "item/compass_07" },
{ "predicate": { "angle": 0.734375 }, "model": "item/compass_08" },
{ "predicate": { "angle": 0.765625 }, "model": "item/compass_09" },
{ "predicate": { "angle": 0.796875 }, "model": "item/compass_10" },
{ "predicate": { "angle": 0.828125 }, "model": "item/compass_11" },
{ "predicate": { "angle": 0.859375 }, "model": "item/compass_12" },
{ "predicate": { "angle": 0.890625 }, "model": "item/compass_13" },
{ "predicate": { "angle": 0.921875 }, "model": "item/compass_14" },
{ "predicate": { "angle": 0.953125 }, "model": "item/compass_15" },
{ "predicate": { "angle": 0.984375 }, "model": "item/compass" }
]
}

不难发现"angle"就是上面打在this.addPropertyOverride()里面的参数
而这些0.625526的数字就是apply的回传值,用此值判断所在区间
0.000000~0.015624就跑去读取 "model": "item/compass"
0.015625~0.046874就派去读取 "model": "item/compass_17"
...

3.自制动态贴图
好既然我们已经知道动态贴图的秘密了我们就自己做一个吧
在compass里的apply方法,官方在每一个变数和和方法上面加上
@SideOnly(Side.CLIENT)注解来实现单边读取,而我们可以用之前做的proxy判断法来实现

现在我们回到ItemBloodsave的构造函数里添加一句
public ItemBloodsave(){
setUnlocalizedName("itembloodsave");
setRegistryName("itembloodsave");
setCreativeTab(CreativeTabs.MATERIALS);
setMaxStackSize(1);

if(!Main.proxy.isServerSider())this.addPropertyOverride(new ResourceLocation("bloodsave"), new ItemBloodsaveTextures());
}

这样只有客户端会执行此句话
我们设定参数名为"bloodsave"
new 一个 ItemBloodsaveTextures()这里我们还没创建会报错

我们现在来创建ItemBloodsaveTextures()

在ItemBloodsaveTextures里输入
public class ItemBloodsaveTextures implements IItemPropertyGetter{
@Override
public float apply(ItemStack stack, World worldIn, EntityLivingBase entityIn) {
if(worldIn == null && entityIn != null)
worldIn = entityIn.getEntityWorld();//玩家背包內的物品沒有世界
if (worldIn != null && stack.getTagCompound() != null && stack.getTagCompound().hasKey("blood")){//阻擋創造模式物品欄
return stack.getTagCompound().getInteger("bloodsave");
}
return 0;
}
}

这里我来解释一下,apply是每一个ItemBloodsave,不管在地上,手里,箱子里,玩家物品栏里,创造模式物品栏里,
每一tick都会执行一次(20tick=1sec)
经过我的测试,在不同地方的物品的输入值也不一样
玩家物品栏 worldIn == null,entityIn != null
地上 worldIn != null,entityIn == null
手里 worldIn != null,entityIn != null
创造模式物品栏 worldIn == null,entityIn == null

我们的物品必须被玩家右击以后才有nbt资料
而创造模式物品栏里的item是不可能有nbt资料的,如果硬要去读取则会崩溃
所以以上代码让还没有nbt的血瓶以及创造模式物品栏内的血瓶回传值为0
其他则读取nbt资料来回传1~20

接下来就剩下json文件和把贴图放进去了
我们回到models.item.itembloodsave.json里改写
{
"parent": "item/generated",
"textures": {
"layer0": "soa:items/itembloodsave"
},
"overrides": [
{ "predicate": { "bloodsave": 0 },"model": "soa:item/itembloodsave" },
{ "predicate": { "bloodsave": 1 },"model": "soa:item/itembloodsave_1"},
{ "predicate": { "bloodsave": 8 }, "model": "soa:item/itembloodsave_2" },
{ "predicate": { "bloodsave": 13 }, "model": "soa:item/itembloodsave_3" },
{ "predicate": { "bloodsave": 20 }, "model": "soa:item/itembloodsave_4" }
]
}

apply回传值↓
0→"model": "soa:item/itembloodsave"
1~7→"model": "soa:item/itembloodsave_1"
8~12→"model": "soa:item/itembloodsave_2"
13~19→ "model": "soa:item/itembloodsave_3"
20→"model": "soa:item/itembloodsave_4"

再来把1,2,3,4models补上

itembloodsave_1

itembloodsave_2

itembloodsave_3

itembloodsave_4

好我们进游戏看看

好,物品的高级玩法似乎就剩多态没讲了我
也是尽量希望做一个实用,并且可以把教程融合在一起的物品
不知道这个血瓶你喜不喜欢呢~

源代码

yycpy

666666顶顶顶

cjrsacred

楼主忽略了一种情况：展示框

cjrsacred

我试了一下，不知道对不对，创造物品栏是无世界有实体的（知道打开物品栏时是这样），展示框是无世界无实体，所以第二个 if 那里不用判断 worldln 就行了

尬兹GZ

顶顶顶！！！

egod

没有报错，存血取血功能正常，但就是不回根据血液存储量更新贴图，伤心
物品代码：

public class PandaBlood extends Item{
private static final String name = "panda_blood";
public PandaBlood() {
super();
setRegistryName(name);
setUnlocalizedName(INFO.MODID+":"+name+"_item");
setCreativeTab(CreativeTabs.MATERIALS);
setMaxStackSize(1);
this.addPropertyOverride(new ResourceLocation("blood_save"),
new IItemPropertyGetter() {
@SideOnly(Side.CLIENT)
public float apply(ItemStack stack, World worldIn, EntityLivingBase entityIn) {
boolean flag = entityIn != null;
entityIn.sendMessage(new TextComponentString("YOU ARE "+entityIn.getName()+
"your panda blood is "+stack.getTagCompound().getInteger("blood_save")));
Entity entity = (Entity)(flag ? entityIn : stack.getItemFrame());
if(worldIn == null && entityIn != null) {
worldIn = entity.world;
}
if(worldIn != null && stack.getTagCompound() != null && stack.getTagCompound().hasKey("blood")) {
return (float)stack.getTagCompound().getInteger("blood_save");
}
return 0F;
}
});
}
@Override
public void addInformation(ItemStack stack, World worldIn, List<String> tooltip,ITooltipFlag flagIn) {
if(flagIn.isAdvanced()) {
tooltip.add("This is ");
tooltip.add("a Panda Blood");
}
else {
tooltip.add(I18n.format(this.getUnlocalizedName()+".1."+"desc"));
}
if(org.lwjgl.input.Keyboard.isKeyDown(org.lwjgl.input.Keyboard.KEY_LSHIFT)) {
tooltip.add(I18n.format(this.getUnlocalizedName()+".shift.1."+"desc"));
}
NBTTagCompound nbt = stack.getTagCompound();
if(nbt!=null && nbt.hasKey("blood_save")) {
tooltip.add("blood:"+nbt.getInteger("blood_save"));
}
}
@Override
public int getMaxItemUseDuration(ItemStack stack) {
return 32;
}
@Override
public EnumAction getItemUseAction(ItemStack stack) {
return EnumAction.DRINK;
}
// 血瓶功能
@Override
public ActionResult<ItemStack> onItemRightClick(World worldIn,EntityPlayer player,EnumHand hand){
player.setActiveHand(hand);
if(!worldIn.isRemote) {
ItemStack item = player.getHeldItem(hand);
// 如果第一次使用，初始化一个内部nbt
if(item.getTagCompound()==null) {
player.sendMessage(new TextComponentString("Seems the first time to use...activated!"));
item.setTagCompound(new NBTTagCompound());
NBTTagCompound nbt = new NBTTagCompound();
nbt.setInteger("blood_save", 0);
item.getTagCompound().setTag("blood", nbt);
}
int bloodSave = item.getTagCompound().getInteger("blood_save");
if(player.isSneaking() && bloodSave<20) {
int damage = new Random().nextInt(10)+1;
player.sendMessage(new TextComponentString("health take: "+damage));
player.setHealth(player.isCreative()?player.getHealth()-0:player.getHealth()-damage);
if(bloodSave+damage > 20) {
item.getTagCompound().setInteger("blood_save", 20);
player.sendMessage(new TextComponentString("Panda Blood seems full..."));
}else {
item.getTagCompound().setInteger("blood_save", bloodSave+damage);
player.sendMessage(new TextComponentString("Now it's "+item.getTagCompound().getInteger("blood_save")+"/20"));
}
player.stopActiveHand();
}else if(player.isSneaking() && bloodSave == 20) {
player.sendMessage(new TextComponentString("hey! your panda blood is already full!"));
}
}
return super.onItemRightClick(worldIn, player, hand);
}
@Override
public ItemStack onItemUseFinish(ItemStack item, World world, EntityLivingBase player) {
if(!world.isRemote) {
int bloodSave = item.getTagCompound().getInteger("blood_save");
float health = player.getHealth();
float maxHealth = player.getMaxHealth();
float heal = Math.min(maxHealth-health, bloodSave);
player.heal(heal);
item.getTagCompound().setInteger("blood_save", bloodSave-(int)heal);
player.sendMessage(new TextComponentString("Panda Blood heals you "+(int)heal+" health"));
player.sendMessage(new TextComponentString("Now it's "+item.getTagCompound().getInteger("blood_save")+"/20"));
}
return super.onItemUseFinish(item, world, player);
}
}

复制代码

item 的json 文件

{
"parent":"item/generated",
"textures":{
"layer0":"panda_mod:panda_blood_texture"
},
"Overrides":[
{"predicate":{"blood_save":0.0},"model":"panda_mod:item/panda_blood_item"},
{"predicate":{"blood_save":1.0},"model":"panda_mod:item/panda_blood_item_1"},
{"predicate":{"blood_save":5.0},"model":"panda_mod:item/panda_blood_item_2"},
{"predicate":{"blood_save":13.0},"model":"panda_mod:item/panda_blood_item_3"},
{"predicate":{"blood_save":20.0},"model":"panda_mod:item/panda_blood_item_4"}
]
}

复制代码

panda_blood_item_1.json

{
"parent":"item/generated",
"textures":{
"layer0":"panda_mod:panda_blood_texture_1"
}

复制代码

egod

egod 发表于 2019-4-19 22:54
没有报错，存血取血功能正常，但就是不回根据血液存储量更新贴图，伤心
物品代码：

forge 版本 1.12.2