A tricky hlsl problem positional wrapping or clipping on the vertex shader ?

[StainlessTobii]

@willmotil

pos3d.x = (((atan2(direction.x, direction.y) / 3.14159265f) * 0.5f + 0.5f)) * ResolutionX;

Try atan2(direction.y,direction.x) to change the action plane