mapbox 动态线条方向
时间: 2023-11-01 07:07:50 浏览: 61
要在mapbox中实现动态线条方向,可以利用mapbox-gl图层Layer中的icon-rotate属性来旋转箭头图标的角度。首先需要注意的是,默认情况下,目标与正北方向之间有90°的夹角,所以需要将目标的方向角度(bearing)减去90°。具体的代码如下:
let iconRotate = Number(bearing - 90);
然后,在配置layout中添加symbol-placement和symbol-spacing属性,并设置symbol-placement为'line',symbol-spacing为图标之间的间隔(默认为250)。同时,还需要设置icon-image为箭头图标的名称,icon-size为图标的大小。以下是添加箭头图层的核心代码:
function addArrowlayer() {
map.addLayer({
'id': 'arrowLayer',
'type': 'symbol',
'source': {
'type': 'geojson',
'data': routeGeoJson //轨迹geojson格式数据
},
'layout': {
'symbol-placement': 'line',
'symbol-spacing': 50, // 图标间隔,默认为250
'icon-image': 'arrowIcon', //箭头图标
'icon-size': 0.5
}
});
}
通过以上代码,可以在mapbox中实现动态线条方向,箭头图标会根据目标的方向角度进行旋转。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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