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Projectile Bounding Box doesn't collide with entities


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So I created a mod with a wave entity but the bounding box doesn't match with the collidings, anyone know how to fix this, I did try setting the BoundingBox even bigger, didn't work, and I don't know what else to do.
Here's the code :

Entity code:

public class WaveEntity extends Projectile {

    private LivingEntity shootingEntity;

    private int ticksbeforedeath = 0;
    private double accelerationX;
    private final float pickRadius = (float) Math.sqrt(122);
    private double accelerationY;
    private double accelerationZ;
    private Vec3 FirstAccel = new Vec3(0, 0, 0);

    public WaveEntity(Level level, LivingEntity shooter, double accelX, double accelY, double accelZ) {
        super(EntityInit.WAVE_ENTITY.get(), level);
        this.shootingEntity = shooter;
        this.moveTo(shooter.getX(), shooter.getEyeY() - 0.1d, shooter.getZ(), shooter.yRotO, shooter.xRotO);
        this.setPos(this.getX(), this.getY(), this.getZ());
        level.playSound(null, new BlockPos(shooter.getX(), shooter.getEyeY(), shooter.getZ()), SoundEvents.FISHING_BOBBER_SPLASH, SoundSource.AMBIENT, 3.0f, 1.0f);
        this.setDeltaMovement(accelX, accelY, accelZ);
        this.FirstAccel = new Vec3(accelX, accelY, accelZ);
        this.setBoundingBox(new AABB(new Vec3(this.getX() - 2 * 5, this.getY(), this.getZ() - 4.5 * 5), new Vec3(this.getX() + 2 * 5, this.getY() + 4 * 5, this.getZ() + 4.5 * 5)));

    public WaveEntity(EntityType<? extends WaveEntity> entityType, Level level) {
        super(entityType, level);

    protected void defineSynchedData() {

    public boolean shouldRenderAtSqrDistance(double distance) {
        double d0 = this.getBoundingBox().getSize() * 4.0D;
        if (Double.isNaN(d0)) {
            d0 = 4.0D;

        d0 = d0 * 64.0D;
        return distance < d0 * d0;

    public void tick() {
        if (ticksbeforedeath >= 40) {
        HitResult hitResult = ProjectileUtil.getHitResult(this, entity -> entity.isAlive() && entity != this.shootingEntity);
        if (hitResult.getType() != HitResult.Type.MISS) {
        this.setPos(FirstAccel.add(this.getX(), this.getY(), this.getZ()));

    public void onImpact(HitResult result) {
        if (this.level.isClientSide()) {

        if (result instanceof EntityHitResult entityHitResult) {
            Entity entity = entityHitResult.getEntity();

            entity.hurt(DamageSource.indirectMagic(this, this.shootingEntity), 4f);

            entity.setDeltaMovement(entity.getDeltaMovement().add(0f, 3f, 0f));

        } else if (result.getType() == HitResult.Type.BLOCK) {
            if (this.level.getBlockState(new BlockPos(result.getLocation())) == Blocks.FIRE.defaultBlockState()) {
                this.level.setBlock(new BlockPos(result.getLocation()), Blocks.AIR.defaultBlockState(), 1);
            if (this.level.getBlockState(new BlockPos(result.getLocation())) == Blocks.LAVA.defaultBlockState()) {
                this.level.setBlock(new BlockPos(result.getLocation()), Blocks.OBSIDIAN.defaultBlockState(), 1);


    public boolean isPickable() {
        return true;

    public float getPickRadius() {
        return this.pickRadius;

    public boolean hurt(@Nonnull DamageSource source, float amount) {
        if (this.isInvulnerableTo(source)) {
            return false;

        if (source.getEntity() != null) {
            Vec3 vec3 = source.getEntity().getLookAngle();

            this.accelerationX = vec3.x * 0.1D;
            this.accelerationY = vec3.y * 0.1D;
            this.accelerationZ = vec3.z * 0.1D;

            if (source.getEntity() instanceof LivingEntity livingEntity) {
                this.shootingEntity = livingEntity;

            return true;
        return false;



public class EntityInit {
    private EntityInit(){}
    public static final DeferredRegister<EntityType<?>> ENTITIES = DeferredRegister.create(ForgeRegistries.ENTITY_TYPES, main.MOD_ID);
    public static final RegistryObject<EntityType<WaveEntity>> WAVE_ENTITY = ENTITIES.register("wave_entity", () -> EntityType.Builder.<WaveEntity>of(WaveEntity::new, MobCategory.MISC).sized(4f, 9f/*Normally setting the good Bounding Box*/).clientTrackingRange(64).updateInterval(1).build(new ResourceLocation(main.MOD_ID, "wave_entity").toString()));
    public static void register (IEventBus eventBus) {



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You don't set the BoundingBox directly. It is recalculated from the dimensions and position whenever the entity moves. See Entity.setPos()

You can see how it calculates the dimensions in refreshDimensions().

It kind of defaults to the entity type dimensions. See Entity.getDimensions(Pose) and the overrides made by specific entities.


For your main issue, I suggest you look at how other projectiles do their collisions. e.g. given your code, those that use AbstractHurtingProjectile like the fireballs.

Edited by warjort


If you don't post your logs/debug.log we can't help you. For curseforge you need to enable the forge debug.log in its minecraft settings. You should also post your crash report if you have one.

If there is no error in the log file and you don't have a crash report then post the launcher_log.txt from the minecraft folder. Again for curseforge this will be in your curseforge/minecraft/Install

Large files should be posted to a file sharing site like https://gist.github.com  You should also read the support forum sticky post.

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