Raycast acting weird when point toward target is straight.

Henrik

I'm quite new to game development, and started using this engine this week, so be easy on me :) Anyway i hit a wall on my test project, and I'm unable to resolve this issue alone.

I have an Enemy and a player which are both KinematicBody2D. My Enemy has a child which is a RayCast2D that i want to use to check if anything is between the Enemy and Player aka. walls and solid objects.

This is the current script that i use to check if anything is colliding from the KinematicBody2D (Enemy):

RayCast.cast_to = player.position - position;
RayCast.force_raycast_update()
 var colliding = RayCast.is_colliding()

I check this every frame, and it mostly works, but when the Enemy is at a straight path toward my Player the Raycast reports false (that nothing is between them), but when i move a bit to the side it reports true. I tried to print the position and input it manually in the Raycast to get a visual reference and it's correct, so i don't quite understand what is wrong.

Megalomaniak

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TwistedTwigleg

Welcome to the forums @Henrik!

Is the second position in global space or local space? The cast_to variable is a position relative to the center of the raycast, so you will want to take the second position, the target, and convert it to a position relative to the Raycast2D if it is not already. You can do something like this:

RayCast.cast_to = RayCast.to_local(player.position);
# or, if the above does not work something else to try:
# RayCast.cast_to = RayCast.to_local(player.global_position)
RayCast.force_raycast_update()
var colliding = RayCast.is_colliding()

Also, something else to keep in mind is that Raycast2D nodes (and really any physics nodes) will only update on every _physics_process call. If this code is not in the _physics_process, you may want to yield for a single physics frame so it has up to date data:

RayCast.cast_to = RayCast.to_local(player.position);
RayCast.force_raycast_update()
yield(get_tree(), “physics_frame”)
var colliding = RayCast.is_colliding()

And that should, hopefully, solve the issue :smile: