25 lines
877 B
25 lines
877 B
define(function(require, exports, module){
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var Path = require('graphic/path');
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var Point = require('graphic/point');
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return require('core/class').createClass({
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base: Path,
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constructor: function(r, R, a1, a2) {
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this.callBase();
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this.draw(r, R, a1, a2);
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this.center = Point.fromPolar( (R + r) / 2, (a1 + a2) / 2 );
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},
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draw: function(r, R, a1, a2) {
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var d = this.getDrawer();
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var p1 = Point.fromPolar(r, a1),
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p2 = Point.fromPolar(R, a1),
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p3 = Point.fromPolar(R, a2),
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p4 = Point.fromPolar(r, a2);
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d.moveTo(p1.x, p1.y);
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d.lineTo(p2.x, p2.y);
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d.carcTo(R, 0, 1, p3.x, p3.y);
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d.lineTo(p4.x, p4.y);
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d.carcTo(r, 0, 0, p1.x, p1.y);
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d.close();
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}
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});
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});
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