[1.12.2] Finding out which side of the block the collision happened on?

[stepsword]

Not really sure how to search for this since my searches come up with stuff I'm not looking for. When an entity collides with a block, is there a simple way to get the face of the block that it collided with (i.e. North South East West Up Down)? I was overriding "onEntityCollidedWithBlock" but I could put it somewhere else if it's easier to get elsewhere. Any ideas?

 

I guess one option would be to get the position of the entity and see if it's NSEWUD compared to the block? 

Edited June 22, 2019 by stepsword

[stepsword]

Or, if anyone knows where the code is for shields reflecting arrows? The only related thing I can find in Shields is EntityLivingBase.knockback but that does not apply to arrows. 

[stepsword]

Thanks, @diesieben07. I did see that part of the code, namely this:

if (amount > 0.0F && this.canBlockDamageSource(source))
{
    this.damageShield(amount);
    amount = 0.0F;

    if (!source.isProjectile())
    {
        Entity entity = source.getImmediateSource();

        if (entity instanceof EntityLivingBase)
        {
            this.blockUsingShield((EntityLivingBase)entity);
        }
    }

    flag = true;
}

 

But blockUsingShield doesn't actually redirect the arrow - it only calls .knockback() if the damage source is a living entity. It may be obvious from my above posts but I was trying to reflect arrows off a block, so I wanted to see how shields coded the "bounce" part (and for some reason I cannot find the code for that animation anywhere), and then I could manually do the NSEWUD check.

 

But anyway I ended up finding the problem that was preventing bounces - ArrowEntity sets a private variable "inGround" which as far as I can tell can't be modified by any setter methods, and it seems to prevents the arrow from moving once it's buried in a block. Ended up using ObfuscationReflectionHelper to change it - I don't really like that "solution" since it seems hacky, but I'll keep it til I find something better if it exists. 

Edited June 23, 2019 by stepsword