illtellyoulater
illtellyoulater
/ range-scaling.js
Last active
January 26, 2023 16:14
— forked from fpillet/scale.js
Javascript value scaling between two ranges, the correct way
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| function convertRange( value, r1, r2 ) { | |
| return ( value - r1[ 0 ] ) * ( r2[ 1 ] - r2[ 0 ] ) / ( r1[ 1 ] - r1[ 0 ] ) + r2[ 0 ]; | |
| } | |
| // example | |
| convertRange(26, [0, 100], [-2, 2]); | |
| // = -0.96 | |
| // another example | |
| convertRange(26, [0, 100.1], [-2, 2]); |