Created
December 8, 2016 22:03
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function polarToCartesian(centerX, centerY, radius, angleInDegrees) { | |
var angleInRadians = (angleInDegrees - 90) * Math.PI / 180.0; | |
return { | |
x: centerX + (radius * Math.cos(angleInRadians)), | |
y: centerY + (radius * Math.sin(angleInRadians)) | |
}; | |
} | |
function describeArc(x, y, radius, startAngle, endAngle) { | |
var start = polarToCartesian(x, y, radius, endAngle); | |
var end = polarToCartesian(x, y, radius, startAngle); | |
var largeArcFlag = endAngle - startAngle <= 180 ? '0' : '1'; | |
var d = [ | |
'M', start.x, start.y, | |
'A', radius, radius, 0, largeArcFlag, 0, end.x, end.y | |
].join(' '); | |
return d; | |
} | |
var degrees = 180; | |
element.find('#arc1').attr('d', describeArc(100, 100, 80, 0, degrees)); |
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