ducha-qianduan/node_modules/echarts/lib/chart/gauge/PointerPath.js

/*
* 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.
*/

var Path = require("zrender/lib/graphic/Path");

/*
* 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.
*/
var _default = Path.extend({
  type: 'echartsGaugePointer',
  shape: {
    angle: 0,
    width: 10,
    r: 10,
    x: 0,
    y: 0
  },
  buildPath: function (ctx, shape) {
    var mathCos = Math.cos;
    var mathSin = Math.sin;
    var r = shape.r;
    var width = shape.width;
    var angle = shape.angle;
    var x = shape.x - mathCos(angle) * width * (width >= r / 3 ? 1 : 2);
    var y = shape.y - mathSin(angle) * width * (width >= r / 3 ? 1 : 2);
    angle = shape.angle - Math.PI / 2;
    ctx.moveTo(x, y);
    ctx.lineTo(shape.x + mathCos(angle) * width, shape.y + mathSin(angle) * width);
    ctx.lineTo(shape.x + mathCos(shape.angle) * r, shape.y + mathSin(shape.angle) * r);
    ctx.lineTo(shape.x - mathCos(angle) * width, shape.y - mathSin(angle) * width);
    ctx.lineTo(x, y);
    return;
  }
});

module.exports = _default;