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[1.15.2] How to make an entity save data


someRandomKid

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public class Car extends AbstractChestedHorseEntity {
    public boolean outofgas;
    private boolean particle_reducer;
   // public static final DataParameter<Float> health = EntityDataManager.createKey(Car.class, DataSerializers.FLOAT);

    public Car(EntityType<? extends Car> type, World worldIn) {
        super(type, worldIn);
        this.outofgas = false;
        this.particle_reducer = false;
    }

    //forgot to do super.registerAttributes() [Sorry]
    @Override
    protected void registerAttributes() {
        this.getAttributes().registerAttribute(SharedMonsterAttributes.MAX_HEALTH);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.MOVEMENT_SPEED);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.FOLLOW_RANGE);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.KNOCKBACK_RESISTANCE);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.ARMOR);
        this.getAttributes().registerAttribute(LivingEntity.SWIM_SPEED);
        this.getAttributes().registerAttribute(LivingEntity.ENTITY_GRAVITY);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.ARMOR_TOUGHNESS);
        this.getAttribute(SharedMonsterAttributes.KNOCKBACK_RESISTANCE).setBaseValue(1.0F);
        this.getAttribute(SharedMonsterAttributes.MOVEMENT_SPEED).setBaseValue(0.4F);
        this.getAttribute(SharedMonsterAttributes.MAX_HEALTH).setBaseValue(40.0F);
        this.getAttribute(SharedMonsterAttributes.FOLLOW_RANGE).setBaseValue(0.0F);
        this.getAttribute(SharedMonsterAttributes.ARMOR).setBaseValue(2.0F);
        this.getAttribute(SharedMonsterAttributes.ARMOR_TOUGHNESS).setBaseValue(2.0F);
        this.getAttribute(LivingEntity.SWIM_SPEED).setBaseValue(0.05F);
    }

    @Override
    protected void registerData() {
        super.registerData();
       // this.dataManager.register(health, 20.0F);
    }

    @Override
    protected void registerGoals() {

    }



    @Override
    public boolean canBeLeashedTo(PlayerEntity player) {
        return false;

    }

    @Override
    public void readAdditional(@NotNull CompoundNBT compound) {
        super.readAdditional(compound);
        this.setFuelValue(compound.getFloat("movedDistance"));
    }

    @Override
    public void writeAdditional(@NotNull CompoundNBT compound) {
        super.writeAdditional(compound);
        compound.putFloat("movedDistance", this.movedDistance);
    }



    @Override
    public void tick() {
        super.tick();
        outofgas = this.movedDistance > 2000;
        this.particle_reducer = !this.particle_reducer;
        ClientWorld world = Minecraft.getInstance().world;
        Vec3d vec = new Vec3d(this.getPosX(),this.getPosY(), this.getPosZ());
        Vec3d speedvec = new Vec3d(-0.3d, 0.2d, 0d);
        vec.add(this.getLookVec());
        if(world != null && !this.outofgas && this.particle_reducer)
            world.addParticle(ParticleTypes.SQUID_INK, vec.x, vec.y, vec.z, speedvec.x, speedvec.y, speedvec.z);
       // this.setHealth(this.getDataManager().get(Car.health));
    }


    public float getMovedDistance(){
        return this.movedDistance;
    }

    public void Refuel(){
        this.distanceWalkedModified = 0;
        this.distanceWalkedOnStepModified = 0;
        this.prevDistanceWalkedModified = 0;
        this.prevMovedDistance = 0;
        this.movedDistance = 0;
        LOGGER.info("REFUELED");
    }

    public void setFuelValue(float value){
        this.distanceWalkedModified = value;
        this.distanceWalkedOnStepModified = value;
        this.prevDistanceWalkedModified = value;
        this.prevMovedDistance = value;
        this.movedDistance = value;
    }


    @Override
    protected boolean canMate() {
        return false;
    }

    @Override
    public boolean canBreed() {
        return false;
    }


    @Nullable
    @Override
    protected SoundEvent getDeathSound() {
        return null;
    }

    @Nullable
    @Override
    protected SoundEvent getAmbientSound() {
        return null;
    }

    @Nullable
    @Override
    protected SoundEvent getHurtSound(DamageSource damageSourceIn) {
        return null;
    }

    @Override
    protected void playStepSound(BlockPos pos, BlockState blockIn) {
        // this.playSound(ModSoundEvents.MOVING_CAR, 0.5F, 1.0F);

    }

    @Override
    public void setMoveStrafing(float amount) {}

    @Override
    public boolean hasChest() {
        return true;
    }

    @Override
    public boolean isTame() {
        return true;
    }

    @Override
    public boolean canEatGrass() {
        return false;
    }

    @Override
    public boolean isHorseSaddled() {
        return !this.outofgas;
    }

    @Override
    public boolean canBeSteered() {
        return !this.outofgas;
    }

    @Override
    public boolean isBreedingItem(@NotNull ItemStack stack) {
        return false;
    }



    @Override
    public boolean wearsArmor() {
        return false;
    }

    @Override
    public boolean canDespawn(double distanceToClosestPlayer) {
        return false;
    }



    @Override
    public boolean canJump() {
        return false;
    }

    @Override
    public boolean canBeRiddenInWater() {
        return false;
    }

    @Override
    public boolean canBePushed() {
        return false;
    }

    @Override
    public boolean canBeSaddled() {
        return false;
    }

    @Override
    protected int getInventorySize() {
        return 29;
    }

    @Override
    public int getInventoryColumns() {
        return 9;
    }
}
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are you sure about that, because its just text:

@SubscribeEvent
public void onRenderGui(RenderGameOverlayEvent.Post event){
    Minecraft minecraft = Minecraft.getInstance();
    if (event.isCancelable() || event.getType() != RenderGameOverlayEvent.ElementType.EXPERIENCE) {
        return;
    }
    FontRenderer font = minecraft.fontRenderer;
    PlayerEntity player = minecraft.player;
    if(player == null)
        return;
    LivingEntity RidingEntity = (LivingEntity)player.getRidingEntity();
    if(RidingEntity != null) {
        if (RidingEntity instanceof Car) {
            Car car = (Car) RidingEntity;
            ChatFormatting chat = (car.getMovedDistance() > 1500) ? ChatFormatting.RED : ChatFormatting.GREEN;
            font.drawStringWithShadow(chat + "Fuel:" + (2000-car.getMovedDistance())/20 + "%", 5, 5, 0);
        }
    }
    Entity entity = minecraft.pointedEntity;
    if(entity instanceof PlaceholderEntity){
        ChatFormatting chat = ChatFormatting.GREEN;
        font.drawStringWithShadow(chat+"Entity ID:"+entity.getEntityId(), 5,5, 0);
    }
}
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//updated code
public class Car extends AbstractChestedHorseEntity {
    public boolean outofgas;
    private boolean particle_reducer;
   public static final DataParameter<Float> Fuel = EntityDataManager.createKey(Car.class, DataSerializers.FLOAT);

    public Car(EntityType<? extends Car> type, World worldIn) {
        super(type, worldIn);
        this.outofgas = false;
        this.particle_reducer = false;
    }

    //forgot to do super.registerAttributes() [Sorry]
    @Override
    protected void registerAttributes() {
        this.getAttributes().registerAttribute(SharedMonsterAttributes.MAX_HEALTH);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.MOVEMENT_SPEED);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.FOLLOW_RANGE);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.KNOCKBACK_RESISTANCE);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.ARMOR);
        this.getAttributes().registerAttribute(LivingEntity.SWIM_SPEED);
        this.getAttributes().registerAttribute(LivingEntity.ENTITY_GRAVITY);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.ARMOR_TOUGHNESS);
        this.getAttribute(SharedMonsterAttributes.KNOCKBACK_RESISTANCE).setBaseValue(1.0F);
        this.getAttribute(SharedMonsterAttributes.MOVEMENT_SPEED).setBaseValue(0.4F);
        this.getAttribute(SharedMonsterAttributes.MAX_HEALTH).setBaseValue(40.0F);
        this.getAttribute(SharedMonsterAttributes.FOLLOW_RANGE).setBaseValue(0.0F);
        this.getAttribute(SharedMonsterAttributes.ARMOR).setBaseValue(2.0F);
        this.getAttribute(SharedMonsterAttributes.ARMOR_TOUGHNESS).setBaseValue(2.0F);
        this.getAttribute(LivingEntity.SWIM_SPEED).setBaseValue(0.05F);
    }

    @Override
    protected void registerData() {
        super.registerData();
        this.dataManager.register(Fuel, 0.0F);
    }

    @Override
    protected void registerGoals() {

    }



    @Override
    public boolean canBeLeashedTo(PlayerEntity player) {
        return false;

    }

    @Override
    public void readAdditional(@NotNull CompoundNBT compound) {
        super.readAdditional(compound);
        this.setFuelValue(compound.getFloat("movedDistance"));
    }

    @Override
    public void writeAdditional(@NotNull CompoundNBT compound) {
        super.writeAdditional(compound);
        compound.putFloat("movedDistance", this.movedDistance);
    }



    @Override
    public void tick() {
        super.tick();
        outofgas = this.movedDistance > 2000;
        this.particle_reducer = !this.particle_reducer;
        ClientWorld world = Minecraft.getInstance().world;
        Vec3d vec = new Vec3d(this.getPosX(),this.getPosY(), this.getPosZ());
        Vec3d speedvec = new Vec3d(-0.3d, 0.2d, 0d);
        vec.add(this.getLookVec());
        this.getDataManager().set(Fuel, this.movedDistance);
        if(world != null && !this.outofgas && this.particle_reducer)
            world.addParticle(ParticleTypes.SQUID_INK, vec.x, vec.y, vec.z, speedvec.x, speedvec.y, speedvec.z);
       // this.setHealth(this.getDataManager().get(Car.health));
    }


    public void Refuel(){
        this.distanceWalkedModified = 0;
        this.distanceWalkedOnStepModified = 0;
        this.prevDistanceWalkedModified = 0;
        this.prevMovedDistance = 0;
        this.movedDistance = 0;
        LOGGER.info("REFUELED");
    }

    public void setFuelValue(float value){
        this.distanceWalkedModified = value;
        this.distanceWalkedOnStepModified = value;
        this.prevDistanceWalkedModified = value;
        this.prevMovedDistance = value;
        this.movedDistance = value;
    }


    @Override
    protected boolean canMate() {
        return false;
    }

    @Override
    public boolean canBreed() {
        return false;
    }


    @Nullable
    @Override
    protected SoundEvent getDeathSound() {
        return null;
    }

    @Nullable
    @Override
    protected SoundEvent getAmbientSound() {
        return null;
    }

    @Nullable
    @Override
    protected SoundEvent getHurtSound(DamageSource damageSourceIn) {
        return null;
    }

    @Override
    protected void playStepSound(BlockPos pos, BlockState blockIn) {
        // this.playSound(ModSoundEvents.MOVING_CAR, 0.5F, 1.0F);

    }

    @Override
    public void setMoveStrafing(float amount) {}

    @Override
    public boolean hasChest() {
        return true;
    }

    @Override
    public boolean isTame() {
        return true;
    }

    @Override
    public boolean canEatGrass() {
        return false;
    }

    @Override
    public boolean isHorseSaddled() {
        return !this.outofgas;
    }

    @Override
    public boolean canBeSteered() {
        return !this.outofgas;
    }

    @Override
    public boolean isBreedingItem(@NotNull ItemStack stack) {
        return false;
    }



    @Override
    public boolean wearsArmor() {
        return false;
    }

    @Override
    public boolean canDespawn(double distanceToClosestPlayer) {
        return false;
    }



    @Override
    public boolean canJump() {
        return false;
    }

    @Override
    public boolean canBeRiddenInWater() {
        return false;
    }

    @Override
    public boolean canBePushed() {
        return false;
    }

    @Override
    public boolean canBeSaddled() {
        return false;
    }

    @Override
    protected int getInventorySize() {
        return 29;
    }

    @Override
    public int getInventoryColumns() {
        return 9;
    }
}
Edited by someRandomKid
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updated code:

package com.new_swords.Entities;

import net.minecraft.block.BlockState;
import net.minecraft.client.Minecraft;
import net.minecraft.client.world.ClientWorld;
import net.minecraft.entity.EntityType;
import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.SharedMonsterAttributes;
import net.minecraft.entity.passive.horse.AbstractChestedHorseEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.CompoundNBT;
import net.minecraft.network.datasync.DataParameter;
import net.minecraft.network.datasync.DataSerializers;
import net.minecraft.network.datasync.EntityDataManager;
import net.minecraft.particles.ParticleTypes;
import net.minecraft.util.DamageSource;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.math.Vec3d;
import net.minecraft.world.World;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class Car extends AbstractChestedHorseEntity {
    public boolean outofgas;
    private boolean particle_reducer;
   public static final DataParameter<Float> Fuel = EntityDataManager.createKey(Car.class, DataSerializers.FLOAT);

    public Car(EntityType<? extends Car> type, World worldIn) {
        super(type, worldIn);
        this.outofgas = false;
        this.particle_reducer = false;
    }

    //forgot to do super.registerAttributes() [Sorry]
    @Override
    protected void registerAttributes() {
        this.getAttributes().registerAttribute(SharedMonsterAttributes.MAX_HEALTH);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.MOVEMENT_SPEED);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.FOLLOW_RANGE);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.KNOCKBACK_RESISTANCE);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.ARMOR);
        this.getAttributes().registerAttribute(LivingEntity.SWIM_SPEED);
        this.getAttributes().registerAttribute(LivingEntity.ENTITY_GRAVITY);
        this.getAttributes().registerAttribute(SharedMonsterAttributes.ARMOR_TOUGHNESS);
        this.getAttribute(SharedMonsterAttributes.KNOCKBACK_RESISTANCE).setBaseValue(1.0F);
        this.getAttribute(SharedMonsterAttributes.MOVEMENT_SPEED).setBaseValue(0.4F);
        this.getAttribute(SharedMonsterAttributes.MAX_HEALTH).setBaseValue(40.0F);
        this.getAttribute(SharedMonsterAttributes.FOLLOW_RANGE).setBaseValue(0.0F);
        this.getAttribute(SharedMonsterAttributes.ARMOR).setBaseValue(2.0F);
        this.getAttribute(SharedMonsterAttributes.ARMOR_TOUGHNESS).setBaseValue(2.0F);
        this.getAttribute(LivingEntity.SWIM_SPEED).setBaseValue(0.05F);
    }

    @Override
    protected void registerData() {
        super.registerData();
        this.dataManager.register(Fuel, this.movedDistance);
    }

    @Override
    protected void registerGoals() {

    }



    @Override
    public boolean canBeLeashedTo(PlayerEntity player) {
        return false;

    }

    @Override
    public void readAdditional(@NotNull CompoundNBT compound) {
        super.readAdditional(compound);
        this.setFuelValue(compound.getFloat("movedDistance"));
    }

    @Override
    public void writeAdditional(@NotNull CompoundNBT compound) {
        super.writeAdditional(compound);
        compound.putFloat("movedDistance", this.movedDistance);
    }



    @Override
    public void tick() {
        super.tick();
        outofgas = this.movedDistance > 2000;
        this.particle_reducer = !this.particle_reducer;
        World world = this.getEntityWorld();
        Vec3d vec = new Vec3d(this.getPosX(),this.getPosY(), this.getPosZ());
        Vec3d speedvec = new Vec3d(-0.3d, 0.2d, 0d);
        vec.add(this.getLookVec());
        this.getDataManager().set(Fuel, this.movedDistance);
        if(!this.outofgas && this.particle_reducer)
            world.addParticle(ParticleTypes.SQUID_INK, vec.x, vec.y, vec.z, speedvec.x, speedvec.y, speedvec.z);
       // this.setHealth(this.getDataManager().get(Car.health));
    }


    public void Refuel(){
        this.distanceWalkedModified = 0;
        this.distanceWalkedOnStepModified = 0;
        this.prevDistanceWalkedModified = 0;
        this.prevMovedDistance = 0;
        this.movedDistance = 0;
        LOGGER.info("REFUELED");
    }

    public void setFuelValue(float value){
        this.distanceWalkedModified = value;
        this.distanceWalkedOnStepModified = value;
        this.prevDistanceWalkedModified = value;
        this.prevMovedDistance = value;
        this.movedDistance = value;
    }


    @Override
    protected boolean canMate() {
        return false;
    }

    @Override
    public boolean canBreed() {
        return false;
    }


    @Nullable
    @Override
    protected SoundEvent getDeathSound() {
        return null;
    }

    @Nullable
    @Override
    protected SoundEvent getAmbientSound() {
        return null;
    }

    @Nullable
    @Override
    protected SoundEvent getHurtSound(DamageSource damageSourceIn) {
        return null;
    }

    @Override
    protected void playStepSound(BlockPos pos, BlockState blockIn) {
        // this.playSound(ModSoundEvents.MOVING_CAR, 0.5F, 1.0F);

    }

    @Override
    public void setMoveStrafing(float amount) {}

    @Override
    public boolean hasChest() {
        return true;
    }

    @Override
    public boolean isTame() {
        return true;
    }

    @Override
    public boolean canEatGrass() {
        return false;
    }

    @Override
    public boolean isHorseSaddled() {
        return !this.outofgas;
    }

    @Override
    public boolean canBeSteered() {
        return !this.outofgas;
    }

    @Override
    public boolean isBreedingItem(@NotNull ItemStack stack) {
        return false;
    }



    @Override
    public boolean wearsArmor() {
        return false;
    }

    @Override
    public boolean canDespawn(double distanceToClosestPlayer) {
        return false;
    }



    @Override
    public boolean canJump() {
        return false;
    }

    @Override
    public boolean canBeRiddenInWater() {
        return false;
    }

    @Override
    public boolean canBePushed() {
        return false;
    }

    @Override
    public boolean canBeSaddled() {
        return false;
    }

    @Override
    protected int getInventorySize() {
        return 29;
    }

    @Override
    public int getInventoryColumns() {
        return 9;
    }
}
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so after taking a break from modding (sorry for not responding!)

 

I finally figured out the problem. 

The problem is that this.movedDistance doesn't get updated on the server, but is getting updated on client.

How would I fix that?

 

EDIT:

The data manager can't get the correct value to sync because this.movedDistance only gets updated on client.

So I think I have to make a packet for this to all work.

Edited by someRandomKid
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