JS很新。
我的第一个Arc描述符工作得很好并且填充了我的第一个量表我想要的,我的问题是让第二个弧描述符工作以填充第二个量表。圆弧描述符根本没有填满我的第二个尺度。
调试后我知道我错过了一些我不知道的东西。
有人可以帮忙吗?
谢谢!
HTML
<div class="ticker-body">
<svg viewBox="19, -19 65 35" class="gauge-background"
fill="none">
<circle r="10"/>
</svg>
<svg viewBox="-39, -39 700 75" class="gauge" fill="none">
<path id="arc-path" transform="rotate(-90)" stroke-
linecap="circle" />
</svg>
</div>
<div class="ticker-body-two">
<svg viewBox="4, -19 65 35" class="gauge-background-two"
fill="none">
<circle r="10"/>
</svg>
<svg viewBox="-51, -34 450 75" class="gauge-two" fill="none">
<path id="arc-path-two" transform="rotate(-90)"
stroke-linecap="circle" />
</svg>
</div>
JS
function describeArc(radius, startAngle, endAngle) {
// Helper function, used to convert the (startAngle, endAngle) arc
// dexcription into cartesian coordinates that are used for the
// SVG arc descriptor.
function polarToCartesian(radius, angle) {
return {
x: radius * Math.cos(angle),
y: radius * Math.sin(angle),
};
}
// Generate cartesian coordinates for the start and end of the arc.
var start = polarToCartesian(radius, endAngle);
var end = polarToCartesian(radius, startAngle);
// Determine if we're drawing an arc that's larger than a 1/2 circle.
var largeArcFlag = endAngle - startAngle <= Math.PI ? 0 : 1;
// Generate the SVG arc descriptor.
var d = [
'M', start.x, start.y,
'A', radius, radius, 1, largeArcFlag, 0, end.x, end.y
].join(' ');
return d;
}
let arc = 0;
setInterval(function() {
// Update the ticker progress.
arc += Math.PI / 1000;
if (arc >= 2 * Math.PI) { arc = 0; }
// Update the SVG arc descriptor.
let pathElement = document.getElementById('arc-path');
//let pathElementTwo = document.getElementById('arc-path-two');
pathElement.setAttribute('d', describeArc(26, 0, arc));
//pathElementTwo.setAttribute('c', describeArcTwo(26, 0, arc));
}, 400 / 0)