/*
|
* 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 Polyline from './Polyline';
|
import EffectLine, {ECSymbolOnEffectLine} from './EffectLine';
|
import * as vec2 from 'zrender/src/core/vector';
|
import { LineDrawSeriesScope } from './LineDraw';
|
import List from '../../data/List';
|
|
|
class EffectPolyline extends EffectLine {
|
private _lastFrame = 0;
|
private _lastFramePercent = 0;
|
private _length: number;
|
|
private _points: number[][];
|
private _offsets: number[];
|
|
// Override
|
createLine(lineData: List, idx: number, seriesScope: LineDrawSeriesScope) {
|
return new Polyline(lineData, idx, seriesScope);
|
};
|
|
// Override
|
protected _updateAnimationPoints(symbol: ECSymbolOnEffectLine, points: number[][]) {
|
this._points = points;
|
const accLenArr = [0];
|
let len = 0;
|
for (let i = 1; i < points.length; i++) {
|
const p1 = points[i - 1];
|
const p2 = points[i];
|
len += vec2.dist(p1, p2);
|
accLenArr.push(len);
|
}
|
if (len === 0) {
|
this._length = 0;
|
return;
|
}
|
|
for (let i = 0; i < accLenArr.length; i++) {
|
accLenArr[i] /= len;
|
}
|
this._offsets = accLenArr;
|
this._length = len;
|
};
|
|
// Override
|
protected _getLineLength() {
|
return this._length;
|
};
|
|
// Override
|
protected _updateSymbolPosition(symbol: ECSymbolOnEffectLine) {
|
const t = symbol.__t;
|
const points = this._points;
|
const offsets = this._offsets;
|
const len = points.length;
|
|
if (!offsets) {
|
// Has length 0
|
return;
|
}
|
|
const lastFrame = this._lastFrame;
|
let frame: number;
|
|
if (t < this._lastFramePercent) {
|
// Start from the next frame
|
// PENDING start from lastFrame ?
|
const start = Math.min(lastFrame + 1, len - 1);
|
for (frame = start; frame >= 0; frame--) {
|
if (offsets[frame] <= t) {
|
break;
|
}
|
}
|
// PENDING really need to do this ?
|
frame = Math.min(frame, len - 2);
|
}
|
else {
|
for (frame = lastFrame; frame < len; frame++) {
|
if (offsets[frame] > t) {
|
break;
|
}
|
}
|
frame = Math.min(frame - 1, len - 2);
|
}
|
|
const p = (t - offsets[frame]) / (offsets[frame + 1] - offsets[frame]);
|
const p0 = points[frame];
|
const p1 = points[frame + 1];
|
symbol.x = p0[0] * (1 - p) + p * p1[0];
|
symbol.y = p0[1] * (1 - p) + p * p1[1];
|
|
const tx = p1[0] - p0[0];
|
const ty = p1[1] - p0[1];
|
symbol.rotation = -Math.atan2(ty, tx) - Math.PI / 2;
|
|
this._lastFrame = frame;
|
this._lastFramePercent = t;
|
|
symbol.ignore = false;
|
};
|
|
}
|
|
export default EffectPolyline;
|