alright so im making a 3d pong game, tryna recreate the coolmath version. The problem is when the ball hits the border its supposed to bounce off of it but sometimes it glitches out and goes out of the border and im not too sure how to fix it, can anyone help? https://scratch.mit.edu/projects/908532211/

Btw dont mind the ball randomly changing directions, that supposed to happen

If the smoothing scaling of the border lags it makies the ball not get hit by it because the border scaled past the ball in 1 frame

cookieclickerer33 wrote:

If the smoothing scaling of the border lags it makies the ball not get hit by it because the border scaled past the ball in 1 frame

wdym?

PlasmicPulse wrote:

cookieclickerer33 wrote:

If the smoothing scaling of the border lags it makies the ball not get hit by it because the border scaled past the ball in 1 frame

wdym?

If the project lags then the border scaling jumps from 1 position to another. This position difference is usally so large that it skips over the ball before the ball can detect it. There’s not much you can do to fix this because that’s just the way scratch works. This only happens if it lags however and that’s not going to be very common

That, and when the ball bounces it can face toward the border multiple times and move more into the border

cookieclickerer33 wrote:

PlasmicPulse wrote:

cookieclickerer33 wrote:

If the smoothing scaling of the border lags it makies the ball not get hit by it because the border scaled past the ball in 1 frame

wdym?

If the project lags then the border scaling jumps from 1 position to another. This position difference is usally so large that it skips over the ball before the ball can detect it. There’s not much you can do to fix this because that’s just the way scratch works. This only happens if it lags however and that’s not going to be very common

That, and when the ball bounces it can face toward the border multiple times and move more into the border

the first that you listed isnt really the problem, but the second thing is. I already know the problem im asking for the solution

PlasmicPulse wrote:

cookieclickerer33 wrote:

PlasmicPulse wrote:

cookieclickerer33 wrote:

If the smoothing scaling of the border lags it makies the ball not get hit by it because the border scaled past the ball in 1 frame

wdym?

If the project lags then the border scaling jumps from 1 position to another. This position difference is usally so large that it skips over the ball before the ball can detect it. There’s not much you can do to fix this because that’s just the way scratch works. This only happens if it lags however and that’s not going to be very common

That, and when the ball bounces it can face toward the border multiple times and move more into the border

the first that you listed isnt really the problem, but the second thing is. I already know the problem im asking for the solution

Trigonometry, let me see if I can find something

https://en.scratch-wiki.info/wiki/If_on_Edge,_Bounce_(block)
Go to “workarounds” then all you need is a way to detect if it’s touching the top or bottom, or left and right

I haven't looked too deeply at the code, so I could be way off. I'll also preface this by saying I haven't fixed it (Or at least, most of it), merely found the cause of the problem.

The first thing I found is that as the ball is not perfectly circular it can clip through walls when rotating. With that fixed the error seemed to be this:


A potential fix would be to prevent the ball from rotating away from the centre.

Apologies for the awful diagram and explanation I'm far too tired to be trying to debug :P