calculateDrivingDirection(newCoordinates,oldCoordinates){
let o = {
direction: ‘‘,
deviation:null,
isTop: false,
isRight: false,
newLng: newCoordinates[0],
newLat: newCoordinates[1],
oldLng: oldCoordinates[0],
oldLat: oldCoordinates[1],
}
o.deviation = Math.abs((o.newLng - o.oldLng)) - Math.abs((o.newLat - o.oldLat))
o.newLng - o.oldLng > 0 ? o.isRight = true : o.isRight = false
o.newLat - o.oldLat > 0 ? o.isTop = true : o.isTop = false
if(o.deviation > 0){ // 大于零 水平方向移动
o.isRight ? o.direction = ‘right‘ : o.direction = ‘left‘
}else{ // 小于零 垂直方向移动
o.isTop ? o.direction = ‘top‘ : o.direction = ‘down‘
}
return o.direction
},
.car-loc-marker.right{ transform: rotate(0deg) } .car-loc-marker.left{ transform: rotate(180deg) } .car-loc-marker.top{ transform: rotate(-90deg) } .car-loc-marker.down{ transform: rotate(90deg) }
原文：https://www.cnblogs.com/tongbiao/p/11687307.html