I have come across a working example of using SVG.js version 2.5.0 for moving a rectangle along a path in jsfiddle. I am trying to duplicate the same behavior but in SVG.js version 3.0.5 but keep getting back an error.
The jsfiddle resides at : jsfiddle and my attempt is at : jsfiddle
When the code is run in chrome i get the following error in the console :
sugar.js:125 Uncaught TypeError: Failed to execute 'getPointAtLength' on 'SVGGeometryElement': The provided float value is non-finite.
at Path.pointAt (sugar.js:125:32)
at o.<anonymous> (svgjsVersion3.html:24:34)
at o.value (Runner.js:430:38)
at o.value (Runner.js:305:28)
at n.value (Timeline.js:274:29)
at _draw (Animator.js:86:17)
The complete html of the page that i am running is :
<html>
<head>
<title>SVG.js</title>
<style>
html, body, #drawing{
width:100%;
height:100%;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/@svgdotjs/[email protected]/dist/svg.min.js"></script>
</head>
<body onload="onload();">
<div id="drawing"></div>
<script>
function onload() {
var draw = SVG().addTo('#drawing').size(800, 800);
var rect = draw.rect(100, 100).attr({fill: '#f06'});
var path = draw.path("m 357.64532,453.84097 c 17.62007,8.02216 -2.12058,27.70935 -13.33334,29.28571 -30.3859,4.27185 -48.34602,-29.97426 -45.23807,-55.9524 5.5594,-46.46879 56.1311,-70.59787 98.57145,-61.19043 62.28294,13.8058 93.32728,82.57702 77.1428,141.19051 C 453.21679,585.29693 365.67122,623.42358 290.97859,600.26951 196.98554,571.13248 151.71003,464.56996 181.93108,373.84089 218.53281,263.95583 344.23687,211.49702 450.97875,248.84102 576.77037,292.84963 636.43303,437.76771 591.93099,560.50775 540.55162,702.21597 376.3736,769.09583 237.6452,717.41234 80.01319,658.68628 5.9069261,475.21736 64.788247,320.50751 130.84419,146.94643 333.62587,65.607117 504.31214,131.69819 693.80625,205.0718 782.38357,427.18225 709.07382,613.84113");
var length = path.length();
path.fill('none').stroke({width: 1, color: '#ccc'});
rect.animate(8000, '<>').during(function(pos, morph, eased){
var p = path.pointAt(eased * length)
rect.center(p.x, p.y)
}).loop(true, true)
}
</script>
</body>
</html>
I followed the advice from Armali and made the corrections as per below that worked.
<!DOCTYPE html>
<html>
<head>
<title>SVG.js</title>
<style>
html, body, #drawing{
width:100%;
height:100%;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/@svgdotjs/[email protected]/dist/svg.min.js"></script>
</head>
<body onload="onload();">
<div id="drawing"></div>
<script>
function onload() {
var draw = SVG().addTo('#drawing').size(800, 800);
var rect = draw.rect(100, 100).attr({fill: '#f06'});
var path = draw.path("m 357.64532,453.84097 c 17.62007,8.02216 -2.12058,27.70935 -13.33334,29.28571 -30.3859,4.27185 -48.34602,-29.97426 -45.23807,-55.9524 5.5594,-46.46879 56.1311,-70.59787 98.57145,-61.19043 62.28294,13.8058 93.32728,82.57702 77.1428,141.19051 C 453.21679,585.29693 365.67122,623.42358 290.97859,600.26951 196.98554,571.13248 151.71003,464.56996 181.93108,373.84089 218.53281,263.95583 344.23687,211.49702 450.97875,248.84102 576.77037,292.84963 636.43303,437.76771 591.93099,560.50775 540.55162,702.21597 376.3736,769.09583 237.6452,717.41234 80.01319,658.68628 5.9069261,475.21736 64.788247,320.50751 130.84419,146.94643 333.62587,65.607117 504.31214,131.69819 693.80625,205.0718 782.38357,427.18225 709.07382,613.84113");
var length = path.length();
console.log(length);
path.fill('none').stroke({width: 1, color: '#ccc'});
rect.animate(5000,1000).ease('<>').during(function(eased){
var p = path.pointAt(eased * length);
rect.center(p.x, p.y);
});
}
</script>
</body>
</html>
I followed the advice and it works :
<!DOCTYPE html>
<html>
<head>
<title>SVG.js</title>
<style>
html, body, #drawing{
width:100%;
height:100%;
}
</style>
<script src="https://cdn.jsdelivr.net/npm/@svgdotjs/[email protected]/dist/svg.min.js"></script>
</head>
<body onload="onload();">
<div id="drawing"></div>
<script>
function onload() {
var draw = SVG().addTo('#drawing').size(800, 800);
var rect = draw.rect(100, 100).attr({fill: '#f06'});
var path = draw.path("m 357.64532,453.84097 c 17.62007,8.02216 -2.12058,27.70935 -13.33334,29.28571 -30.3859,4.27185 -48.34602,-29.97426 -45.23807,-55.9524 5.5594,-46.46879 56.1311,-70.59787 98.57145,-61.19043 62.28294,13.8058 93.32728,82.57702 77.1428,141.19051 C 453.21679,585.29693 365.67122,623.42358 290.97859,600.26951 196.98554,571.13248 151.71003,464.56996 181.93108,373.84089 218.53281,263.95583 344.23687,211.49702 450.97875,248.84102 576.77037,292.84963 636.43303,437.76771 591.93099,560.50775 540.55162,702.21597 376.3736,769.09583 237.6452,717.41234 80.01319,658.68628 5.9069261,475.21736 64.788247,320.50751 130.84419,146.94643 333.62587,65.607117 504.31214,131.69819 693.80625,205.0718 782.38357,427.18225 709.07382,613.84113");
var length = path.length();
console.log(length);
path.fill('none').stroke({width: 1, color: '#ccc'});
rect.animate(5000,1000).ease('<>').during(function(eased){
var p = path.pointAt(eased * length);
rect.center(p.x, p.y);
});
}
</script>
</body>
</html>