Raycast based projectile can't hit moving objects

[Kurt-Dekker]

I assume you are not using the physics system and trying to do your own collision? If you are using physics, enable continuous dynamic collisions and it should Just Work™.

Some other ideas;

• keep a previous AND a current collider for the black (or the orange) object, chasing it along with a one-frame delay. This would only up your raycast count to 2: either 2 raycasts from 2 orange positions, OR two raycasts against two target colliders.

You can actually raycast against the two specific colliders directly with Collider.Raycast (or Collider2D.Raycast() ) to further simplify the problem, or use layering to keep the ghost object from interacting with anything else.

Raycasting, colliders, planes, Plane, etc:

(Help)How can i detect how many raycasts are hitting an object?

There are many types of 3D raycasts. One is the generic Physics one: hits anything in the scene Another is one that lives on a collider. If you know which collider you care about, you can use that collider instance to see if a ray hits it. That way you not only know that it hit, but because you are already asking "Did anything hit this collider?" you also know what collider it is. These are some of the types of 3D raycasts: https://docs.unity3d.com/ScriptReference/Physics.Raycast.htm…

Keeping a plain/terrain within the view frustrum

You can get rays from the camera at a given spot, so one approach is to cast rays from the camera corners and make sure they hit your terrain, or hit your terrain bounding box. To ignore screen pixel dimensions and just get the corner rays, this is the API you want: The nice part is that it doesn’t matter how your camera is set, how your field of view is set, etc., It just works. You can use this to raycast and hit physics on your ground using: asks “did I hit any collider in the scene?…

• another way is forego raycasting and just iterate the “enough” steps between the orange object’s move frames, checking with either Overlap() calls or just checking coordinates for closeness. The term “enough” would be approximately one plus the maximum movement magnitude divided by the smaller collider’s size.