Godot 4 has the function remap which I think you’re looking for
this post was submitted on 11 Oct 2023
18 points (90.9% liked)
Godot
5873 readers
24 users here now
Welcome to the programming.dev Godot community!
This is a place where you can discuss about anything relating to the Godot game engine. Feel free to ask questions, post tutorials, show off your godot game, etc.
Make sure to follow the Godot CoC while chatting
We have a matrix room that can be used for chatting with other members of the community here
Links
Other Communities
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
- [email protected]
Rules
- Posts need to be in english
- Posts with explicit content must be tagged with nsfw
- We do not condone harassment inside the community as well as trolling or equivalent behaviour
- Do not post illegal materials or post things encouraging actions such as pirating games
We have a four strike system in this community where you get warned the first time you break a rule, then given a week ban, then given a year ban, then a permanent ban. Certain actions may bypass this and go straight to permanent ban if severe enough and done with malicious intent
Wormhole
Credits
- The icon is a modified version of the official godot engine logo (changing the colors to a gradient and black background)
- The banner is from Godot Design
founded 1 year ago
MODERATORS
I think that may work! Thanks!
Maybe you’re looking for lerp()?
Given two vectors and a value between 1.0 and 0, it’ll produce a vector at a point between the inputs.
https://docs.godotengine.org/en/stable/classes/class_vector2.html#class-vector2-method-lerp
I think /u/breadsmasher has your answer, but FWIW, mapping from an arbitrary range onto the range of 0.0 to 1.0 is called normalization
Not sure if there's a name for the opposite operation
Here's a Wikipedia article where they just call it Rescaling
Sounds like inverse lerp
Well there is normalization , regularization, and standardization, but it basically depends on what you want to do and what implications that has for your data.
X is the set and x is a value in that set.
So:
1 - { [ max(X) - x ] / [ max(X)- min(X) ] }
or alternatively,
[x- min(X)] / [max(X)-min(X)]
Should do what you are asking, which sounds like normalization. That will normalize your values between 0 and 1. However, it wont do anything about your data being skewed to one side or the other. So the mean of this value won't be 0.5, the halfway point between 0 and 1.
If you want something like that, you will need to standardize your data prior to running the above algorithm:
Something like:
[ x - mean(X) ] / std(X)
This will center your data around 0. If you then apply the first function (normalization), it should now be centered around 0.5 (even if it is not normally distributed).
OP might also be interested in the reverse operation. If s is your number from 0 to 1, the corresponding position in the "real" space is min + s * (max-min), which can also be written as (1-s)min + smax . This is sometimes called a linear interpolation, or a weighted average. Note that you can also use the same formulas with s smaller than zero and larger than one, thus performing linear extrapolation. Finally, these same formulas apply in higher dimensions, just think of min and max as the coordinates of two vectors, and appy these formulas for each coordinate, and you get linear interpolation between your two vectors.
Related, note that division is much slower than multiplication.
Instead of:
n / d
see if you can refactor it to:
n * (1.0/d)
where that inverse can then be hoisted out of loops.
Just to clarify, the value in parentheses must be precalculated.
For example, instead of:
n / 2
Do:
n * 0.5
This is something for compiler writers to worry about.
Compilers are generally forbidden from optimizing floating-point arithmetic, since it can change precision.
If multiplication vs division is causing perf issues you fucked up somewhere or shouldn't be asking on Lemmy for help because your performance critical system is of the safety and health type.
I've never had division actually be a real issue.
Here's a good article relating lerp and remap. https://www.gamedev.net/articles/programming/general-and-gameplay-programming/inverse-lerp-a-super-useful-yet-often-overlooked-function-r5230/
Not overly familiar with Godot, but this is a classic use case for an easing function like Lerp. Read more here: https://www.febucci.com/2018/08/easing-functions/