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[1.15.2] How to make custom TNT


someRandomKid

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public class MegaTNTRenderer extends EntityRenderer<MegaTNTEntity> {

	@Override  
    public void render(MegaTNTEntity entityIn, float entityYaw, float partialTicks, MatrixStack matrixStackIn, IRenderTypeBuffer bufferIn, int packedLightIn) {
        matrixStackIn.push();
        matrixStackIn.translate(0.0D, 0.5D, 0.0D);
        if ((float)entityIn.getFuse() - partialTicks + 1.0F < 10.0F) {
            float f = 1.0F - ((float)entityIn.getFuse() - partialTicks + 1.0F) / 10.0F;
            f = MathHelper.clamp(f, 0.0F, 1.0F);
            f = f * f;
            f = f * f;
            float f1 = 1.0F + f * 0.3F;
            matrixStackIn.scale(f1, f1, f1);
        }

        matrixStackIn.rotate(Vector3f.YP.rotationDegrees(-90.0F));
        matrixStackIn.translate(-0.5D, -0.5D, 0.5D);
        matrixStackIn.rotate(Vector3f.YP.rotationDegrees(90.0F));
        TNTMinecartRenderer.renderTntFlash(RegistryHandler.MEGA_TNT.get().getDefaultState(), matrixStackIn, bufferIn, packedLightIn, entityIn.getFuse() / 5 % 2 == 0);
        matrixStackIn.pop();
        super.render(entityIn, entityYaw, partialTicks, matrixStackIn, bufferIn, packedLightIn);
    }

    public MegaTNTRenderer(EntityRendererManager renderManager) {
        super(renderManager);
        this.shadowSize = 0.5F;
    }

    @Override
    public ResourceLocation getEntityTexture(MegaTNTEntity entity) {
        return PlayerContainer.LOCATION_BLOCKS_TEXTURE;
    }
}

Tell me if you need more code.

Edited by someRandomKid
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public class MegaTNTEntity extends Entity {
    private static final DataParameter<Integer> FUSE = EntityDataManager.createKey(MegaTNTEntity.class, DataSerializers.VARINT);
    @Nullable
    private LivingEntity tntPlacedBy;
    private int fuse;


    public MegaTNTEntity(EntityType<? extends MegaTNTEntity> type, World worldIn) {
        super(type, worldIn);
    }


    public MegaTNTEntity(World worldIn, double x, double y, double z, @Nullable LivingEntity igniter) {
        this(RegistryHandler.MEGA_TNT_ENTITY.get(),worldIn);
        this.setPosition(x, y, z);
        double d0 = worldIn.rand.nextDouble() * (double)((float)Math.PI * 2F);
        this.setMotion(-Math.sin(d0) * 0.02D, 0.2D, -Math.cos(d0) * 0.02D);
        this.prevPosX = x;
        this.prevPosY = y;
        this.prevPosZ = z;
        this.fuse = 120;
        this.tntPlacedBy = igniter;
    }

    @Nullable
    public LivingEntity getTntPlacedBy() {
        return this.tntPlacedBy;
    }

    public void setFuse(int fuse) {
        this.fuse = fuse;
    }


    public boolean canBeCollidedWith() {
        return false;
    }

    @Override
    protected void registerData() {
        this.dataManager.register(FUSE, 80);
    }

    @Override
    public void writeAdditional(CompoundNBT compound) {
        compound.putShort("Fuse", (short)this.getFuse());
    }

    /**
     * (abstract) Protected helper method to read subclass entity data from NBT.
     */
    @Override
    public void readAdditional(CompoundNBT compound) {
        this.setFuse(compound.getShort("Fuse"));
    }

    @Override
    public void tick() {
        //new_swords.LOGGER.info(this.fuse);
        //new_swords.LOGGER.info(this.getPosX() + "," + this.getPosY() + "," + this.getPosZ());
        //new_swords.LOGGER.info("on ground? " + this.onGround);
        if (!this.hasNoGravity()) {
            this.setMotion(this.getMotion().add(0.0D, -0.04D, 0.0D));
        }

        this.move(MoverType.SELF, this.getMotion());
        this.setMotion(this.getMotion().scale(0.98D));
        if (this.onGround) {
            this.setMotion(this.getMotion().mul(0.7D, -0.5D, 0.7D));
        }

        --this.fuse;
        if (this.fuse <= 0) {
            this.remove();
            if (!this.world.isRemote) {
                this.explode();
            }
        } else {
            this.handleWaterMovement();
            if (this.world.isRemote) {
                this.world.addParticle(ParticleTypes.SMOKE, this.getPosX(), this.getPosY() + 0.5D, this.getPosZ(), 0.0D, 0.0D, 0.0D);
            }
        }
    }


    protected void explode() {
        float f = 20.0f;
        new_swords.LOGGER.info("exploding?");
        MinecraftServer server = this.getServer();
        if(server == null)
            return;
        ServerWorld world = server.getWorld(this.dimension);
        world.createExplosion(this, this.getPosX(), this.getPosYHeight(0.0625D), this.getPosZ(), f, Explosion.Mode.BREAK);
    }


    public int getFuse() {
        return this.fuse;
    }

    public void notifyDataManagerChange(DataParameter<?> key) {
        if (FUSE.equals(key)) {
            this.fuse = this.getFuseDataManager();
        }

    }


    /**
     * Gets the fuse from the data manager
     */
    public int getFuseDataManager() {
        return this.dataManager.get(FUSE);
    }


    public @NotNull IPacket<?> createSpawnPacket() {
        return new SSpawnObjectPacket(this);
    }
}

 

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This code seems to be the problem:

    public @NotNull IPacket<?> createSpawnPacket() {
        return new SSpawnObjectPacket(this);
    }

You cannot use the vanilla spawn packet here, you need to override createSpawnPacket with:

return NetworkHooks.getEntitySpawningPacket(this);

otherwise your entity will be existing only on the server and so invisibile to you on the client

Check out the port of the BetterEnd fabric mod (WIP): https://www.curseforge.com/minecraft/mc-mods/betterend-forge-port

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