/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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import {Path} from '../graphic';
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import { PathProps } from 'zrender/src/graphic/Path';
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/**
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* Sausage: similar to sector, but have half circle on both sides
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*/
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class SausageShape {
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cx = 0;
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cy = 0;
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r0 = 0;
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r = 0;
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startAngle = 0;
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endAngle = Math.PI * 2;
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clockwise = true;
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}
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interface SausagePathProps extends PathProps {
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shape?: SausageShape
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}
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class SausagePath extends Path<SausagePathProps> {
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type = 'sausage';
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constructor(opts?: SausagePathProps) {
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super(opts);
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}
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getDefaultShape() {
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return new SausageShape();
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}
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buildPath(ctx: CanvasRenderingContext2D, shape: SausageShape) {
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const x = shape.cx;
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const y = shape.cy;
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const r0 = Math.max(shape.r0 || 0, 0);
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const r = Math.max(shape.r, 0);
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const dr = (r - r0) * 0.5;
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const rCenter = r0 + dr;
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const startAngle = shape.startAngle;
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const endAngle = shape.endAngle;
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const clockwise = shape.clockwise;
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const unitStartX = Math.cos(startAngle);
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const unitStartY = Math.sin(startAngle);
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const unitEndX = Math.cos(endAngle);
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const unitEndY = Math.sin(endAngle);
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const lessThanCircle = clockwise
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? endAngle - startAngle < Math.PI * 2
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: startAngle - endAngle < Math.PI * 2;
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if (lessThanCircle) {
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ctx.moveTo(unitStartX * r0 + x, unitStartY * r0 + y);
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ctx.arc(
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unitStartX * rCenter + x, unitStartY * rCenter + y, dr,
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-Math.PI + startAngle, startAngle, !clockwise
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);
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}
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ctx.arc(x, y, r, startAngle, endAngle, !clockwise);
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ctx.moveTo(unitEndX * r + x, unitEndY * r + y);
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ctx.arc(
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unitEndX * rCenter + x, unitEndY * rCenter + y, dr,
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endAngle - Math.PI * 2, endAngle - Math.PI, !clockwise
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);
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if (r0 !== 0) {
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ctx.arc(x, y, r0, endAngle, startAngle, clockwise);
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ctx.moveTo(unitStartX * r0 + x, unitEndY * r0 + y);
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}
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ctx.closePath();
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}
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}
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export default SausagePath;
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