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尝试在特征绘制在选项卡上后发出几何图形1.然后尝试使用socket.on重新绘制特征以显示在选项卡2上。但是由于某些原因,该特征不是画。使用node.js在ol3中绘制特征
window.onload = function init() {
var source = new ol.source.Vector({ wrapX: false });
//create a base vector layer to draw on
var vector = new ol.layer.Vector({
source: source,
});
var raster = new ol.layer.Tile({
source: new ol.source.OSM()
});
//create map
map = new ol.Map({
layers: [raster, vector],
target: 'map',
controls: ol.control.defaults({
attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
collapsible: false
})
}),
view: new ol.View({
center: [0,0],
zoom: 10
})
});
function drawShape(value) {
var value = value;
if (value !== 'None') {
draw = new ol.interaction.Draw({
source: source,
type: /** @type {ol.geom.GeometryType} */ (value)
});
map.addInteraction(draw);
draw.on('drawend', function (event) {
// Get the array of features
var feature = event.feature
try {
map.removeInteraction(draw);
socket.emit('new polygon', feature.getGeometry().getCoordinates());
socket.emit('chat message', feature.getGeometry().getCoordinates());
} catch (err) { }
});
}
}
var socket = io();
socket.on('new polygon', function (msg) {
var thing = new ol.geom.Polygon(msg);
var featurething = new ol.Feature({
name: "Thing",
geometry: thing
});
source.addFeature(featurething);
});
}
当脚本运行时,msg包含一个坐标数组。控制台中不显示任何内容。
我在node.js中初学者任何人知道我在做什么错误
可以从您的Node.js脚本中添加一些示例输出?你的'socket.on'中的'msg'看起来像什么?来自openlayers的任何浏览器控制台错误? – chrki
这已更新 – Khal786