More maths differences

[gingerbeardman]

Contrast the following cart in pico8 and picolove

http://www.lexaloffle.com/bbs/?tid=2464

It's set to tween using ease_in_out_cubicwhich gets great results in pico8, but bad results in picolove. Other easing functions are also affected.

function ease_in_out_cubic(t,b,c,d)  -- cubic easing in/out - acceleration until halfway, then deceleration
  t /= d/2
  if (t < 1) return c/2*t*t*t + b
  t -= 2
  return c/2*(t*t*t + 2) + b
end

I've ruled out short operators by manually expanding them. No difference.

Perhaps an issue with expression parsing?

[ftsf]

Thanks, good find!

The problem is with t /= d/2

This expands to t = t / d/2 when it should expand to t = t / (d/2)

[ftsf]

Sadly, this is not an easy fix, I'll need to implement a modified lua parser to handle this case, and also some of the other shorthand.

[gingerbeardman]

Thanks for the info.

The workaround in my code is to do:

t /= (d/2)

which then expands correctly.