[1.15.2] Ray Trace Entity With Custom Range

[-TheLittleGuy]

Since 1.15 introduced a lot of significant changes as opposed to 1.12, I cannot figure out how to RayTrace an entity from a range further than what pointedEntity allows (~4 blocks)

I am able to raytrace blocks from an increased range using BlockRayTraceResult, but I am unsure how to apply this to entities. I want to be able to target an entity from a range of about 50 blocks.

Please let me know where to start. Thank You.

 

[TheGreyGhost]

Howdy

Have you looked at ProjectileHelper::rayTraceEntities? 

You should be able to adapt the code in there to do what you want.  50 blocks is a very long way,though.   It might be more efficient to use a different algorithm which filters entities manually, i.e.

for each entity in world {

vec3d entityPosition = entity - origin

check if position is in the correct octant (x +ve or -ve, y +ve or -ve, z + or -ve etc)

if so {

  vec3d distanceFromEntityToRay = cross product (position, ray) / norm (ray)

  if distanceFromEntityToRay < 5 then include in detailed raytrace otherwise exclude

}

}

you'll need to know a bit of vector math to do that...

 

-TGG

 

 

[-TheLittleGuy]

hmm the code i used in my old mod came from the source code of a different mod, but im not sure if it can be adapted to 1.15, i believe it involved vector math aswell might have to give it a go 
Thank you for the pointers though!

 

Edit: Found some code from another mod that I believe I can adapt to my specific use case

Edited June 15, 2020 by -TheLittleGuy