ol-plot-enhanced/src/Geometry/Arrow/SquadCombat.js

ol plot enhanced

/**
 * Created by FDD on 2017/5/26.
 * @desc 分队战斗行动
 * @Inherits AttackArrow
 */

import { SQUAD_COMBAT } from '../../Utils/PlotTypes'
import AttackArrow from './AttackArrow'
import * as PlotUtils from '../../Utils/utils'
import * as Constants from '../../Constants'
class SquadCombat extends AttackArrow {
  constructor (coordinates, points, params) {
    super(coordinates, points, params)
    this.type = SQUAD_COMBAT
    this.headHeightFactor = 0.18
    this.headWidthFactor = 0.3
    this.neckHeightFactor = 0.85
    this.neckWidthFactor = 0.15
    this.tailWidthFactor = 0.1
    this.set('params', params)
    if (points && points.length > 0) {
      this.setPoints(points)
    } else if (coordinates && coordinates.length > 0) {
      this.setCoordinates(coordinates)
    }
  }

  /**
   * 执行动作
   */
  generate () {
    try {
      let count = this.getPointCount()
      if (count < 2) {
        return false
      } else {
        let pnts = this.getPoints()
        let tailPnts = this.getTailPoints(pnts)
        let headPnts = this.getArrowHeadPoints(pnts, tailPnts[0], tailPnts[1])
        let neckLeft = headPnts[0]
        let neckRight = headPnts[4]
        let bodyPnts = this.getArrowBodyPoints(pnts, neckLeft, neckRight, this.tailWidthFactor)
        let count = bodyPnts.length
        let leftPnts = [tailPnts[0]].concat(bodyPnts.slice(0, count / 2))
        leftPnts.push(neckLeft)
        let rightPnts = [tailPnts[1]].concat(bodyPnts.slice(count / 2, count))
        rightPnts.push(neckRight)
        leftPnts = PlotUtils.getQBSplinePoints(leftPnts)
        rightPnts = PlotUtils.getQBSplinePoints(rightPnts)
        this.setCoordinates([leftPnts.concat(headPnts, rightPnts.reverse())])
      }
    } catch (e) {
      console.log(e)
    }
  }

  getTailPoints (points) {
    let allLen = PlotUtils.getBaseLength(points)
    let tailWidth = allLen * this.tailWidthFactor
    let tailLeft = PlotUtils.getThirdPoint(points[1], points[0], Constants.HALF_PI, tailWidth, false)
    let tailRight = PlotUtils.getThirdPoint(points[1], points[0], Constants.HALF_PI, tailWidth, true)
    return ([tailLeft, tailRight])
  }
}

export default SquadCombat