[1.15.2 | Solved] How to Raytrace from Block to Block and get facing

[Shiranai]

I am trying to raytrace from the position of a block and i want to find the position of a block in a specific direction but all the raytracing methods i've found need an entity.

I also need to find which way the block is facing (north, east, down, ...).

 

Edited March 2, 2020 by Shiranai
Solved

[Draco18s]

If your raytrace is orthogonal (directly north, directly east, directly SW), just iterate over BlockPos values.

[Shiranai]

On 3/1/2020 at 8:49 PM, Draco18s said:

If your raytrace is orthogonal (directly north, directly east, directly SW), just iterate over BlockPos values.

Yeah, i'm doing that at the moment. It does feel kinda hacky though if you have to do it over long distances. I am currently checking in every direction. How can i get the direction the block is facing, so i can check a specific direction?

[Draco18s]

29 minutes ago, Shiranai said:

How can i get the direction the block is facing

BlockState#get(Property<T>)

30 minutes ago, Shiranai said:

Yeah, i'm doing that at the moment. It does feel kinda hacky though if you have to do it over long distances.

RayTrace() is going to be worse, because instead of checking at 1 unit distances, it checks at 0.1 unit distances.

[Shiranai]

2 minutes ago, Draco18s said:

RayTrace() is going to be worse, because instead of checking at 1 unit distances, it checks at 0.1 unit distances.

Oh, i always thought raytracing was a pretty resource sparing thing. Thanks

[Draco18s]

1 hour ago, Shiranai said:

i always thought raytracing was a pretty resource sparing thing

 

No, no it is not.

https://www.reddit.com/r/raytracing/comments/c08qxz/ray_tracing_is_computationally_expensive_are/

While most "raytracing" things refer to rendering, the same process is applied by physics calculations (of which Minecraft's implementations qualify as). You have to use a very small delta otherwise you're bound to miss corners when moving diagonally at arbitrary angles.

[Zagreo]

I managed to do it this way. It's kinda messy but hopefully it will help you.

https://pastebin.com/Q0mVsJRi

RayTraceUtil.getTargetBlock(player, world, maxdistance)

This should give you the block you are looking at.

I'm new to modding so I'm not shure how correct this is.

 

Edited May 6, 2020 by Zagreo
added link