[1.16.1] Altering hitbox shape of mob

[the_infamous_1]

For clarification, when I am talking about the hitboxes and their colors, I mean the ones that show up after pressing F3+B in-game.

I have a mob that is drastically wider on the X-axis than it is on the Z-axis, so I've been overriding Entity#getBoundingBox to return one that is shrunk on the z-axis, which does work for the general hitbox of the mob (the one with a white outline). However, the suffocation hitbox (the thin red hitbox that determines if a mob should be suffocating from being inside a block) still uses the same X/Z dimensions. I can't seem to find a method to override in Entity/LivingEntity that allows me to change the suffocation hitbox, if there even is one. As a work-around, I've overridden LivingEntity#isEntityInsideOpaqueBlock but of course the displayed suffocation hitbox is still the same.

[felinoid]

First off, can you just set the size from the EntityType? If all entities of this type are that size, that is the best way to do it. The entity type builder has a method .size(width, height) to set the hitbox size.

 

As for the suffocation hitbox not changing, I think that is a forge bug. See https://github.com/MinecraftForge/MinecraftForge/issues/7399. If you can't set the size for the EntityType, you could use reflection to change eyeHeight yourself (it's a private value).

[the_infamous_1]

The thing is, I need the entity width to be a large number so that the entity is wide enough on the X-axis, but it needs to be drastically thinner on the Z-axis (I'm talking 6.0F wide on X, 1.0F wide on Z). Entity width is used for both the X-axis width and Z-axis width, so it's not like I can make them separate. This is why I have to override getBoundingBox and shrink the bounding box along the Z-axis.

I will look into eye height, though, thanks for that tip.

[felinoid]

Ah sorry, for some reason I was thinking X/Y. For X/Z your workaround is a decent idea, and I don't think the eye height will help you.

[the_infamous_1]

Now I've run into this crazy bug. If I make the entity's width small, and then try to grow it on the axis that is larger, then the world gets corrupted somehow as mobs cannot move / start floating on collision and leaves decay rapidly. If I make it big, and instead shrink it on the axis that is smaller, then it's ok.
 

The small-then-grow approach makes the suffocation hitbox correct, while the large-then-shrink approach makes it not.

Edited October 7, 2020 by the_infamous_1

[Draco18s]

You need to use multiple hitboxes, like the dragon.