/**
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* @Author: Caven
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* @Date: 2020-08-30 17:26:34
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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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import AttackArrowGraphics from './AttackArrowGraphics'
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class TailedAttackArrowGraphics extends AttackArrowGraphics {
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constructor(options) {
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super(options)
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this.headHeightFactor = 0.18
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this.headWidthFactor = 0.3
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this.neckHeightFactor = 0.85
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this.neckWidthFactor = 0.15
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this.tailWidthFactor = 0.1
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this.headTailFactor = 0.8
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this.swallowTailFactor = 1
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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 tailLeft = pnts[0]
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let tailRight = pnts[1]
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if (PlotUtil.isClockWise(pnts[0], pnts[1], pnts[2])) {
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tailLeft = pnts[1]
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tailRight = pnts[0]
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}
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let midTail = PlotUtil.mid(tailLeft, tailRight)
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let bonePnts = [midTail].concat(pnts.slice(2))
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let headPnts = this._getArrowHeadPoints(bonePnts, tailLeft, tailRight)
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let neckLeft = headPnts[0]
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let neckRight = headPnts[4]
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let tailWidth = PlotUtil.distance(tailLeft, tailRight)
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let allLen = PlotUtil.getBaseLength(bonePnts)
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let len = allLen * this.tailWidthFactor * this.swallowTailFactor
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let swallowTailPnt = PlotUtil.getThirdPoint(
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bonePnts[1],
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bonePnts[0],
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0,
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len,
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true
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)
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let factor = tailWidth / allLen
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let bodyPnts = this._getArrowBodyPoints(
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bonePnts,
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neckLeft,
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neckRight,
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factor
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)
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let count = bodyPnts.length
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let leftPnts = [tailLeft].concat(bodyPnts.slice(0, count / 2))
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leftPnts.push(neckLeft)
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let rightPnts = [tailRight].concat(bodyPnts.slice(count / 2, count))
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rightPnts.push(neckRight)
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leftPnts = PlotUtil.getQBSplinePoints(leftPnts)
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rightPnts = PlotUtil.getQBSplinePoints(rightPnts)
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return new Cesium.PolygonHierarchy(
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Transform.transformWGS84ArrayToCartesianArray(
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Parse.parsePositions(
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leftPnts.concat(headPnts, rightPnts.reverse(), [
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swallowTailPnt,
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leftPnts[0]
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])
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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 TailedAttackArrowGraphics
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