给定RGB值计算色谱上相应的坐标

来源：互联网发布：淘宝买csgo钥匙编辑：程序博客网时间：2024/05/18 17:04
<html xmlns="http://www.w3.org/1999/xhtml" ><head><title>Color Picker</title><script type="text/javascript" src="jquery.min.js"></script><script type="text/javascript">var configColorArea = {    minX: 1,    maxX: 209,    minY: 1,    maxY: 119};function changeRGB(R,G,B){var k = parseInt(R),j = parseInt(G),h = parseInt(B),i;if (isNaN(k) || k > 255 || k < 0) {R = 255} if (isNaN(j) || j > 255 || j < 0) {G = 255} if (isNaN(h) || h > 255 || h < 0) {B = 255} i = rgb2hsl(R / 255, G / 255, B / 255);var hue = Math.round(i.h);var sat = Math.round(i.s * 100);var lum = Math.round(i.l * 100);refreshCoordinatesByHSL(hue, sat, lum);}function rgb2hsl(j, i, d){var h, f, c;var a = Math.max(j, i, d),e = Math.min(j, i, d);c = 0.5 * (a + e);if (a == e) {h = 0} else {if (a == j) {h = 60 * (i - d) / (a - e);if (i < d) {h += 360}} else {if (a == i) {h = 60 * (d - j) / (a - e) + 120} else {h = 60 * (j - i) / (a - e) + 240}}}if (c == 0 || a == e) {f = 0} else {if (c <= 0.5) {f = 0.5 * (a - e) / c} else {f = 0.5 * (a - e) / (1 - c)}}return {h: h,s: f,l: c}}function refreshCoordinatesByHSL(f, e, b){    a = Math.round((configColorArea.maxX - configColorArea.minX) * f / 359) + configColorArea.minX;    d = Math.round((configColorArea.maxY - configColorArea.minY) * (100 - b) / 100) + configColorArea.minY;    c = Math.round((configColorArea.maxY - configColorArea.minY) * (100 - e) / 100) + configColorArea.minY;    setColorAreaXY(a, d);}function setColorAreaXY(a, c){    var b = configColorArea;    a = parseInt(a);    var x=0;    var y=0;    if (b.minX > a) {        x = b.minX    } else {        if (a > b.maxX) {            x = b.maxX        } else {            if (!isNaN(a)) {                x = a            }        }    }    c = parseInt(c);    if (b.minY > c) {        y = b.minY    } else {        if (c > b.maxY) {            y = b.maxY        } else {            if (!isNaN(c)) {                y = c            }        }    }    refreshPosition(x,y)}function refreshPosition(x,y){//定义一个点的css样式var innerHTML="<div style='position: absolute; top: "+y+"px; left: "+x+"px; height: 20px; width: 20px;'><div style='position: absolute; width: 4px; height: 20px; left: 8px; top: 0px; background: rgb(255, 255, 255);'></div><div style='position: absolute; height: 4px; width: 20px; top: 8px; left: 0px; background: rgb(255, 255, 255);'></div><div style='position: absolute; height: 18px; width: 2px; left: 9px; top: 1px; background: rgb(76, 76, 76);'></div><div style='position: absolute; width: 18px; height: 2px; top: 9px; left: 1px; background: rgb(76, 76, 76);'></div></div>";$("#positions").append(innerHTML);}$(function(){/*changeRGB(0, 0, 0);changeRGB(255, 255, 255);changeRGB(228, 185, 170);changeRGB(228, 170, 187);*/})</script></head><body><div id="positions" style="top: 118px;left: 200px;position: absolute;width: 210px;height: 120px;"><div style="position: absolute;width: 210px;height: 120px;background-image: url('shiseqi.png');background-repeat: no-repeat;cursor: pointer;float: left;"></din></div></body></html>
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