给定这个函数,我想用随机颜色生成器替换颜色。
document.overlay = GPolyline.fromEncoded({
color: "#0000FF",
weight: 10,
points: encoded_points,
zoomFactor: 32,
levels: encoded_levels,
numLevels: 4
});
我该怎么做呢?
给定这个函数,我想用随机颜色生成器替换颜色。
document.overlay = GPolyline.fromEncoded({
color: "#0000FF",
weight: 10,
points: encoded_points,
zoomFactor: 32,
levels: encoded_levels,
numLevels: 4
});
我该怎么做呢?
当前回答
随机颜色生成与亮度控制:
function getRandColor(brightness){
// Six levels of brightness from 0 to 5, 0 being the darkest
var rgb = [Math.random() * 256, Math.random() * 256, Math.random() * 256];
var mix = [brightness*51, brightness*51, brightness*51]; //51 => 255/5
var mixedrgb = [rgb[0] + mix[0], rgb[1] + mix[1], rgb[2] + mix[2]].map(function(x){ return Math.round(x/2.0)})
return "rgb(" + mixedrgb.join(",") + ")";
}
其他回答
function randomColor(format = 'hex') {
const rnd = Math.random().toString(16).slice(-6);
if (format === 'hex') {
return '#' + rnd;
}
if (format === 'rgb') {
const [r, g, b] = rnd.match(/.{2}/g).map(c=>parseInt(c, 16));
return `rgb(${r}, ${g}, ${b})`;
}
}
函数 getHashColor() { var hash = “0123456789ABCDEF”; var hashColor = “#”; for (var i = 0; i < 6; i++) hashColor += hash[Math.floor(Math.random() * hash.length)]; document.getElementById('demo').style.background = hashColor } <div id=“demo” style=“background:red;height:300px;width:300px”></div> <button type=“button” onclick=“getHashColor()”>Clik Me</button>
Use:
function randomColor(){
var num = Math.round(Math.random() * Math.pow(10,7));
// Converting number to hex string to be read as RGB
var hexString = '#' + num.toString(16);
return hexString;
}
此方法将获得一个随机数,将其转换为十六进制字符串,然后提取它的一部分,从而得到一个随机十六进制。
function randomColor() {
return "#" + Math.random().toString(16).slice(2,8);
}
不需要十六进制字母的散列。JavaScript可以自己做到这一点:
function get_random_color() {
function c() {
var hex = Math.floor(Math.random()*256).toString(16);
return ("0"+String(hex)).substr(-2); // pad with zero
}
return "#"+c()+c()+c();
}