Moving points on curve to raycast hit position - Geometry nodes

Question

I have a bezier circle around a cube object.
I use Instance on Points to find 10 points on the curve, and instance a placeholder sphere mesh on them.

I would like to have each point raycast toward a specific target (the cube) and move the spheres on the hit points of the cube.

This is my basic setup

If I connect the set position node, instead of moving the spheres, they disappear as if no hit appears.

What am I doing wrong?

Answer 1

To solve this task, you would only need to pay attention to the Ray Direction:

Instantiate your spheres, but do NOT transform them with Realize Instances. Instead use the Raycast node directly. This way the Source Position is the position of the instances.

As Ray Direction you use the direction you get when you subtract the positions of the instances from the position of your cube.

_{(Blender 3.2+)}