Ribbon.js
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import * as graphic from '../../util/graphic';
var sin = Math.sin;
var cos = Math.cos;
export default graphic.extendShape({
type: 'ec-ribbon',
shape: {
cx: 0,
cy: 0,
r: 0,
s0: 0,
s1: 0,
t0: 0,
t1: 0
},
style: {
fill: '#000'
},
buildPath: function (ctx, shape) {
var clockwise = shape.clockwise || false;
var cx = shape.cx;
var cy = shape.cy;
var r = shape.r;
var s0 = shape.s0;
var s1 = shape.s1;
var t0 = shape.t0;
var t1 = shape.t1;
var sx0 = cx + cos(s0) * r;
var sy0 = cy + sin(s0) * r;
var sx1 = cx + cos(s1) * r;
var sy1 = cy + sin(s1) * r;
var tx0 = cx + cos(t0) * r;
var ty0 = cy + sin(t0) * r;
var tx1 = cx + cos(t1) * r;
var ty1 = cy + sin(t1) * r;
ctx.moveTo(sx0, sy0);
ctx.arc(cx, cy, shape.r, s0, s1, !clockwise);
ctx.bezierCurveTo(
(cx - sx1) * 0.70 + sx1,
(cy - sy1) * 0.70 + sy1,
(cx - tx0) * 0.70 + tx0,
(cy - ty0) * 0.70 + ty0,
tx0, ty0
);
// Chord to self
if (shape.s0 === shape.t0 && shape.s1 === shape.t1) {
return;
}
ctx.arc(cx, cy, shape.r, t0, t1, !clockwise);
ctx.bezierCurveTo(
(cx - tx1) * 0.70 + tx1,
(cy - ty1) * 0.70 + ty1,
(cx - sx0) * 0.70 + sx0,
(cy - sy0) * 0.70 + sy0,
sx0, sy0
);
}
});