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javascript - RGB 空间淡入淡出

转载 作者:行者123 更新时间:2023-12-03 10:51:36 25 4
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对于另一个项目,我们正在尝试淡入 RGB 颜色空间(从一种颜色到另一种颜色)。作为概念证明,我们用 JavaScript 构建逻辑。最终结果是,div 的背景应逐步更改为给定的颜色。但在我们的示例中,div 只是设置为最终颜色,并且不显示开始颜色和结束颜色之间的步骤。

既然我们无法让它工作,我们的问题是:这里出了什么问题?是逻辑有问题还是我们的 JS 技能有问题:)?

<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
</head>
<body>
<script>
$(function() {
var colors = [];
$('#go').click(function() {
console.log($('#red1').val()+" "+$('#green1').val()+" "+$('#blue1').val()+" "+$('#red2').val()+" "+$('#green2').val()+" "+$('#blue2').val());
slidecolor($('#red1').val(), $('#green1').val(), $('#blue1').val(), $('#red2').val(), $('#green2').val(), $('#blue2').val());
readArray();
});

function slidecolor(StartsR, StartsG, StartsB, aimR, aimG, aimB) {
StartsR = parseInt(StartsR);
StartsG = parseInt(StartsG);
StartsB = parseInt(StartsB);
aimR = parseInt(aimR);
aimG = parseInt(aimG);
aimB = parseInt(aimB);
if(aimR >= StartsR)
{
var directionR = 1;
console.log("größer");
var distanceR = aimR - StartsR;
}
else
{
var directionR = 0;
console.log("kleiner");
var distanceR = StartsR - aimR;
}
if(aimB >= StartsB)
{
var directionB = 1;

var distanceB = aimB - StartsB;
}
else
{
var directionB = 0;
var distanceB = StartsB - aimB;
}
if(aimG >= StartsG)
{
var directionG = 1;
var distanceG = aimG - StartsG;
}
else
{
var directionG = 0;
var distanceG = StartsG - aimG;

}

if((distanceR >= distanceB) && (distanceR >= distanceG)) { var distance = distanceR; }
if((distanceG >= distanceR) && (distanceG >= distanceB)) { var distance = distanceG; }
if((distanceB >= distanceR) && (distanceB >= distanceG)) { var distance = distanceB; }

var stepsR = Math.round(distance/distanceR);
var stepsG = Math.round(distance/distanceG);
var stepsB = Math.round(distance/distanceB);
console.log(distance+" "+distanceR);
console.log(stepsR+" "+stepsG+" "+stepsB);

var tmpstepsR = 0;
var tmpstepsG = 0;
var tmpstepsB = 0;



for(i=0; i<=distance; i++) {
console.log(i);
if(i==0)
{
console.log("FIRST RUN");
if(directionR == 1) {
var tmpR = StartsR + 1;
tmpstepsR = stepsR;
}
else
{
var tmpR = StartsR - 1;
tmpstepsR = stepsR + 1;
}
if(directionG == 1) {
var tmpG = StartsG + 1;
tmpstepsG = stepsG;
}
else
{
var tmpG = StartsG - 1;
tmpstepsG = stepsG;
}
if(directionB == 1) {
var tmpB = StartsB + 1;
tmpstepsB = stepsB;
}
else
{
tmpstepsB = stepsB;
var tmpB = StartsB - 1;
}
}
else
{
console.log("NEXT RUN");
if(((stepsR == i) || (tmpstepsR == i)) && tmpR != aimR)
{
tmpstepsR = tmpstepsR + stepsR;
if(directionR == 1) {
var tmpR = tmpR + stepsR;
}
else
{
var tmpR = tmpR - stepsR;
}
}
if(((stepsG == i) || (tmpstepsG == i)) && tmpG != aimG)
{
tmpstepsG = tmpstepsG + stepsG;
if(directionG == 1) {
var tmpG = tmpG + stepsG;
}
else
{
var tmpG = tmpG - stepsG;
}
}
if(((stepsB == i) || (tmpstepsB == i)) && tmpB != aimB)
{
tmpstepsB = tmpstepsB + stepsB;
if(directionB == 1) {
var tmpB = tmpB + stepsB;
}
else
{
var tmpB = tmpB - stepsB;
}
}
}
console.log('rgb('+ tmpR +','+ tmpG +','+ tmpB +')');
colors.push('rgb('+ tmpR +','+ tmpG +','+ tmpB +')');
}
}

function readArray(){

colors.forEach(function(entry){
timeOut(entry);
$('#color').css("background-color", entry);

});

}

function timeOut(entry){

setTimeout(function(){$('#color').css("background-color", entry);}, 3000);

}

});
</script>
<h1>Farbe 1</h1>
red: <input id="red1">
green: <input id="green1">
blue: <input id="blue1">
<h1>Farbe 2</h2>
red: <input id="red2">
green: <input id="green2">
blue: <input id="blue2">
<button id="go">LET'S GO</button>
<div id="color" style="width:500px;height:500px"></div>
</body>
</html>

请注意,由于这只是第一次尝试,某些部分可能会有点问题或难看。最后一部分我们添加了一些时间,这是最后的手段,可能不是最佳实践......

编辑:jsfiddle

最佳答案

readArray ,您正在迭代 colors 中的所有条目大批。这个迭代只需要很少的时间(比你注意到的要快)。在迭代期间,所有设置了3秒超时。它们没有排序,只是设置为在 forEach 之后约 3 秒执行。完成了。

您需要正确排序回调:

function readArray(){
timeOut(colors, 0);
}

function timeOut(array, index){
var entry = colors[index];
$('#color').css("background-color", entry);
var nextIndex = index + 1;

if(nextIndex < array.length){
setTimeout(function(){
timeOut(array, nextIndex);
}, 30);
}
}

基本上,在执行当前“步骤”时,您可以设置下一步的超时时间。

<强> Example Fiddle

请注意,我将超时设置为 30每步毫秒,因此您实际上可以注意到淡入淡出。

(当然,您可以使用 readArray(); 而不是 timeOut(colors, 0); ,这样您就可以完全删除 readArray )

关于javascript - RGB 空间淡入淡出,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/28406429/

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