three
Version:
JavaScript 3D library
85 lines (52 loc) • 1.6 kB
JavaScript
import {
MathUtils
} from 'three';
const _hsl = {};
class ColorConverter {
static setHSV( color, h, s, v ) {
// https://gist.github.com/xpansive/1337890#file-index-js
h = MathUtils.euclideanModulo( h, 1 );
s = MathUtils.clamp( s, 0, 1 );
v = MathUtils.clamp( v, 0, 1 );
return color.setHSL( h, ( s * v ) / ( ( h = ( 2 - s ) * v ) < 1 ? h : ( 2 - h ) ), h * 0.5 );
}
static getHSV( color, target ) {
if ( target === undefined ) {
console.warn( 'THREE.ColorConverter: .getHSV() target is now required' );
target = { h: 0, s: 0, l: 0 };
}
color.getHSL( _hsl );
// based on https://gist.github.com/xpansive/1337890#file-index-js
_hsl.s *= ( _hsl.l < 0.5 ) ? _hsl.l : ( 1 - _hsl.l );
target.h = _hsl.h;
target.s = 2 * _hsl.s / ( _hsl.l + _hsl.s );
target.v = _hsl.l + _hsl.s;
return target;
}
// where c, m, y, k is between 0 and 1
static setCMYK( color, c, m, y, k ) {
const r = ( 1 - c ) * ( 1 - k );
const g = ( 1 - m ) * ( 1 - k );
const b = ( 1 - y ) * ( 1 - k );
return color.setRGB( r, g, b );
}
static getCMYK( color, target ) {
if ( target === undefined ) {
console.warn( 'THREE.ColorConverter: .getCMYK() target is now required' );
target = { c: 0, m: 0, y: 0, k: 0 };
}
const r = color.r;
const g = color.g;
const b = color.b;
const k = 1 - Math.max( r, g, b );
const c = ( 1 - r - k ) / ( 1 - k );
const m = ( 1 - g - k ) / ( 1 - k );
const y = ( 1 - b - k ) / ( 1 - k );
target.c = c;
target.m = m;
target.y = y;
target.k = k;
return target;
}
}
export { ColorConverter };