Using a mixin to give PlayerEntity multiple hitboxes

[Hughie]

I am trying to turn the player into a multipart entity, and it is kind of working. F3 + B does in fact show multiple hitboxes but if I try to punch them it doesn't work since for some reason when I print in the hurt method if it's client side, it's always true. Can somebody help me actually make it damage the parent (player) when you hit the part entity, please? It probably looks like I don't know what I'm doing, and that's for the most part because I don't, I'm new to mixins and working with custom entities

 

Spoiler

@Mixin(Player.class)
public abstract class PlayerEntityMixin implements IForgeEntity {
    private PlayerPartEntity[] subEntities;
    
    @Inject(method = "<init>*", at = @At("RETURN"))
    private void onConstruct(CallbackInfo ci) {
        Player player = (Player) (Object) this;
        
        PlayerPartEntity test1 = new PlayerPartEntity(player, 1.0F, 1.0F);
        PlayerPartEntity test2 = new PlayerPartEntity(player, 5.0F, 5.0F);
        
        this.subEntities = new PlayerPartEntity[] {test1, test2};
    }
    
    @Inject(method = "aiStep", at = @At("TAIL"))
    private void aiStep(CallbackInfo ci) {
        Player player = (Player) (Object) this;
        
        Vector3d[] positions = new Vector3d[this.subEntities.length];
        
        for (int i = 0; i < this.subEntities.length; ++i) {
            positions = new Vector3d(this.subEntities.getX(), this.subEntities.getY(), this.subEntities.getZ());
        }
        
        float bodyAngle = (float) (player.yBodyRot * Math.PI / 180.0F);
        
        double xOffset = Math.sin(bodyAngle);
        double zOffset = -Math.cos(bodyAngle);
        
        this.tickPart(this.subEntities[0], xOffset * -1.0D, 0.0D, zOffset * -1.0D);
        this.tickPart(this.subEntities[1], xOffset * -5.0D, 0.0D, zOffset * -5.0D);
        
        for (int i = 0; i < this.subEntities.length; ++i) {
            this.subEntities.xo = positions.x;
            this.subEntities.yo = positions.y;
            this.subEntities.zo = positions.z;
            this.subEntities.xOld = positions.x;
            this.subEntities.yOld = positions.y;
            this.subEntities.zOld = positions.z;
        }
    }
    
    @Override
    public boolean isMultipartEntity() {
        return true;
    }
    
    @Override
    public PartEntity<?>[] getParts() {
        return this.subEntities;
    }
    
    private void tickPart(PlayerPartEntity part, double xOffset, double yOffset, double zOffset) {
        Player player = (Player) (Object) this;
        
        part.setPos(player.getX() + xOffset, player.getY() + yOffset, player.getZ() + zOffset);
    }
}

 

Spoiler

public class PlayerPartEntity extends PartEntity<Player> {
    private Player parent;
    
    private EntityDimensions size;
    
    public PlayerPartEntity(Player parent, float width, float height) {
        super(parent);
        
        this.parent = parent;
        
        this.size = EntityDimensions.scalable(width, height);
        
        super.refreshDimensions();
    }

    @Override
    protected void defineSynchedData() { }

    @Override
    protected void readAdditionalSaveData(CompoundTag nbt) { }

    @Override
    protected void addAdditionalSaveData(CompoundTag nbt) { }
    
    @Override
    public boolean hurt(DamageSource source, float amount) {
        System.out.println(this.parent.level.isClientSide);
        
        return (!super.isInvulnerableTo(source) && this.parent.hurt(source, amount));
    }
    
    @Override
    public EntityDimensions getDimensions(Pose pose) {
        return this.size;
    }
    
    @Override
    public boolean isPickable() {
        return true;
    }
}

 

Edited July 18, 2023 by Hughie
Changed from 1.16.5 to 1.19.4 so I can actually get support

[Hughie]

The fix for hitting the hitbox was setting an ID for them but they still can't be seen by other players when using CTRL+  B, why?