Allow an entity to pass through certain blocks

[Jay Avery]

I'm making an entity, and I want it to be able to move through certain block types (but not ALL block types) as if they're air - no collisions etc. Is there any way to do this?

 

I've been looking through the Entity code but I'm just really confused. I can't seem to find where block collisions actually happen, only collisions with other entities.

Edited March 16, 2017 by Jay Avery

[Jay Avery]

I found that event, but I don't know how I would go about removing the collision boxes of specific block types, since the event just contains a list of AxisAlignedBB. Is there a way to find out the block that each collision box comes from?