...Hello,

I'm stumped trying to find the fastest formula for 2 balls connected by a wall bounce vector.

given 2 balls, red and blue, red is at position x:200, y:350 and blue at position x:600, y:700. If we have a wall at position y:0 (reverse Cartesian for y).

How do we calculate for blue to bounce on the wall and hit red at center?

see the attachment for a visual of the question.

Thanks!!