var YAHOO = function() { return {util: {}} } (); YAHOO.util.Color = new function() { this.hsv2rgb = function (h, s, v) { var r, g, b; if ( s == 0 ) { r = v * 255; g = v * 255; b = v * 255;} else { var var_h = h * 6; if ( var_h == 6 ) { var_h = 0;}
var var_i = Math.floor( var_h ); var var_1 = v * ( 1 - s ); var var_2 = v * ( 1 - s * ( var_h - var_i ) ); var var_3 = v * ( 1 - s * ( 1 - ( var_h - var_i ) ) ); if ( var_i == 0 ) { var_r = v; var_g = var_3; var_b = var_1;} else if ( var_i == 1 ) { var_r = var_2; var_g = v; var_b = var_1;} else if ( var_i == 2 ) { var_r = var_1; var_g = v; var_b = var_3
} else if ( var_i == 3 ) { var_r = var_1; var_g = var_2; var_b = v;} else if ( var_i == 4 ) { var_r = var_3; var_g = var_1; var_b = v;} else { var_r = v; var_g = var_1; var_b = var_2
}
r = var_r * 255
g = var_g * 255
b = var_b * 255
}
return [Math.round(r), Math.round(g), Math.round(b)];}; this.rgb2hsv = function (r, g, b) { var r = ( r / 255 ); var g = ( g / 255 ); var b = ( b / 255 ); var min = Math.min( r, g, b ); var max = Math.max( r, g, b ); deltaMax = max - min; var v = max; var s, h; var deltaRed, deltaGreen, deltaBlue; if ( deltaMax == 0 )
{ h = 0; s = 0;}
else
{ s = deltaMax / max; deltaRed = ( ( ( max - r ) / 6 ) + ( deltaMax / 2 ) ) / deltaMax; deltaGreen = ( ( ( max - g ) / 6 ) + ( deltaMax / 2 ) ) / deltaMax; deltaBlue = ( ( ( max - b ) / 6 ) + ( deltaMax / 2 ) ) / deltaMax; if ( r == max ) h = deltaBlue - deltaGreen; else if ( g == max ) h = ( 1 / 3 ) + deltaRed - deltaBlue; else if ( b == max ) h = ( 2 / 3 ) + deltaGreen - deltaRed; if ( h < 0 ) h += 1; if ( h > 1 ) h -= 1;}
return [h, s, v];}
this.rgb2hex = function (r,g,b) { return this.toHex(r) + this.toHex(g) + this.toHex(b);}; this.hexchars = "0123456789ABCDEF"; this.toHex = function(n) { n = n || 0; n = parseInt(n, 10); if (isNaN(n)) n = 0; n = Math.round(Math.min(Math.max(0, n), 255)); return this.hexchars.charAt((n - n % 16) / 16) + this.hexchars.charAt(n % 16);}; this.toDec = function(hexchar) { return this.hexchars.indexOf(hexchar.toUpperCase());}; this.hex2rgb = function(str) { var rgb = []; rgb[0] = (this.toDec(str.substr(0, 1)) * 16) + this.toDec(str.substr(1, 1)); rgb[1] = (this.toDec(str.substr(2, 1)) * 16) + this.toDec(str.substr(3, 1)); rgb[2] = (this.toDec(str.substr(4, 1)) * 16) + this.toDec(str.substr(5, 1)); return rgb;}; this.isValidRGB = function(a) { if ((!a[0] && a[0] !=0) || isNaN(a[0]) || a[0] < 0 || a[0] > 255) return false; if ((!a[1] && a[1] !=0) || isNaN(a[1]) || a[1] < 0 || a[1] > 255) return false; if ((!a[2] && a[2] !=0) || isNaN(a[2]) || a[2] < 0 || a[2] > 255) return false; return true;};}