/**
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* @Author: Caven
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* @Date: 2020-08-30 17:10:33
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*/
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import { Cesium } from '@dc-modules/namespace'
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import Parse from '@dc-modules/parse/Parse'
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import { Transform } from '@dc-modules/transform'
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import { PlotUtil } from '@dc-modules/utils'
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const HALF_PI = Math.PI / 2
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class FineArrowGraphics {
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constructor(options) {
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this._positions = options?.positions || []
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this.tailWidthFactor = 0.15
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this.neckWidthFactor = 0.2
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this.headWidthFactor = 0.25
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this.headAngle = Math.PI / 8.5
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this.neckAngle = Math.PI / 13
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}
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set positions(positions) {
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this._positions = positions
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}
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get positions() {
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return this._positions
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}
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get hierarchy() {
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return this._createHierarchy()
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}
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_createHierarchy() {
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let pnts = Parse.parsePolygonCoordToArray(
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Transform.transformCartesianArrayToWGS84Array(this._positions)
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)[0]
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let pnt1 = pnts[0]
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let pnt2 = pnts[1]
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let len = PlotUtil.getBaseLength(pnts)
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let tailWidth = len * this.tailWidthFactor
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let neckWidth = len * this.neckWidthFactor
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let headWidth = len * this.headWidthFactor
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let tailLeft = PlotUtil.getThirdPoint(pnt2, pnt1, HALF_PI, tailWidth, true)
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let tailRight = PlotUtil.getThirdPoint(
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pnt2,
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pnt1,
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HALF_PI,
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tailWidth,
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false
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)
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let headLeft = PlotUtil.getThirdPoint(
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pnt1,
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pnt2,
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this.headAngle,
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headWidth,
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false
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)
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let headRight = PlotUtil.getThirdPoint(
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pnt1,
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pnt2,
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this.headAngle,
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headWidth,
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true
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)
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let neckLeft = PlotUtil.getThirdPoint(
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pnt1,
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pnt2,
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this.neckAngle,
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neckWidth,
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false
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)
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let neckRight = PlotUtil.getThirdPoint(
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pnt1,
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pnt2,
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this.neckAngle,
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neckWidth,
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true
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)
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return new Cesium.PolygonHierarchy(
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Transform.transformWGS84ArrayToCartesianArray(
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Parse.parsePositions([
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tailLeft,
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neckLeft,
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headLeft,
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pnt2,
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headRight,
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neckRight,
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tailRight
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])
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)
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)
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}
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}
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export default FineArrowGraphics
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