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---
layout: post
title: "map1d in detail"
permalink: methods/map1d.html
---
### Name ###
`map1d` _NB: a different was used than vanilla processing because `map` has another meaning in ruby and we anticipate a possible `map2d` or even `map3d`_.
### Examples ###
```ruby
#!/usr/bin/env jruby -w
require 'picrate'
class UsingMap1D < Processing::App
def settings
size(200, 200)
end
def setup
sketch_title 'Using map1d'
no_stroke
end
def draw
background(204)
x1 = map1d(mouse_x, (0..width), (50..150))
ellipse(x1, 75, 50, 50)
x2 = map1d(mouse_x, (0..width), (0..200))
ellipse(x2, 125, 50, 50)
end
end
UsingMap1D.new
```
### Description ###
Re-maps a number from one range to another.
As shown in the example, numbers outside of the range are not clamped to the minimum and maximum parameters values, because out-of-range values are often intentional and useful.
### Syntax ###
```ruby
map1d(value, (start1..stop1), (start2..stop2))
```
### Parameters ###
value the incoming value to be converted
start1 lower bound of the value's current range
stop1 upper bound of the value's current range
start2 lower bound of the value's target range
stop2 upper bound of the value's target range
Returns float
### Related ###
`constrained_map` (numbers are clamped to range)
`p5map` (same signature as [processing map][map])
`norm` (same as [processing norm][norm])
`norm_strict` (output is clamped to 0..1.0)
`lerp`
[norm]:https://processing.org/reference/norm_.html
[map]:https://processing.org/reference/map_.html
Version data entries
34 entries across 34 versions & 1 rubygems