How to smoothly change speed of an object?

[NikRetaNCAM]

Every object takes time to slow down right?

this code IMMEDIATELY stops the object, but i want it to take a bit of time to slow down

[NikRetaNCAM]

here's what i use for acceleration by the way

[Geokureli]

rather than setting an object's velocity directly you should use acceleration and drag. I see you're just setting a speed value, I assume that sets velocity, instead set acceleration, and cap it with maxVelocity

this project calculates acceleration and drag based on how long it should take to speed up to max speed and how long to come to a full stop (Source linked in the page)
https://www.newgrounds.com/portal/view/723552

Here's the game's actual code to solve for maxVelocity, acceleration and drag. Note that maxSpeed is determined by how far the player is supposed to be able to jump.
https://github.com/Geokureli/Dial-A-Platformer/blob/master/source/art/DialAPlatformer.hx#L242-L265

[NikRetaNCAM]

oh, that's useful. acceleration affects velocity, right? so technically by checking what velocity is object at right now, i can apply correct animations, am i right?

[Geokureli]

sure

[NikRetaNCAM]

sure

cool, um.. another question. what EXACTLY does drag do? like, the bigger the drag, the faster object will slow down, or opposite?

[Geokureli]

I answered that above

drag is a dampening force applied to velocity whenever acceleration is 0. so if drag is 100 and velocity is 100 the object will stop in one second.

A positive drag value will always slow velocity to zero, higher drag means it will slow down quicker

[NikRetaNCAM]

wow, this works so much better in so many levels! thank you, Geokureli!