Distance along an axis?

Community Community & Industry Discussion
, , , ,
1

Hello,

I’m trying to get the distance along an axis, but can’t figure it out.

For example, if my player (blue star) is approaching a finish line (the red dot being it’s pivot point), how can I get the distance from that line, along it’s proper axis?

The player can be in the center of the road, off to the side, or a million miles in the sky. All that matters is far away he is from that point, along it’s facing axis.

Any ideas?
Thanks!

Edit: Changed the picture/desc to make it more clear.

2

FVector Diff = EndPoint - StartPoint;
Diff.Normalize();
float Dist = FVector::DotProduct(Diff, (EndPoint - PlayerPosition));

3

Is this homework? It looks like homework. Look at dot products.

4

It’s not homework lol.

Trying to figure out the distance the player is between 2 points. Sort of like a how far the player is between a start and finish line, where only the distance from the start/finish line matters, and not his actual position on the road. Can’t seem to get anything working properly.

5

I’ve never been able to fully wrap my head around dot product.
That was exactly what I needed, thankyou!