shadow.js
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import objectManage from './maputils';
export default class shadow {
constructor() {
this.points = [];
this.shadowQuery = new Cesium.ShadowQueryPoints(objectManage.viewer.scene);
this.shadowQuery.build();
this.setCurrentTime();
this.init();
}
setCurrentTime() {
let d = new Date();
d.setHours(20)
objectManage.viewer.clock.currentTime = Cesium.JulianDate.fromDate(d);
objectManage.viewer.clock.multiplier = 1;
objectManage.viewer.clock.shouldAnimate = true;
}
init() {
this.tooltip = this.createTooltip(document.body);
this.handlerPolygon = new Cesium.DrawHandler(objectManage.viewer, Cesium.DrawMode.Polygon, 0);
this.handlerPolygon.activeEvt.addEventListener(a => {
let body = $('body').removeClass('measureCur');
a && body.addClass('measureCur');
(objectManage.viewer.enableCursorStyle = !a) || (objectManage.viewer._element.style.cursor = '');
});
this.handlerPolygon.movingEvt.addEventListener(windowPosition => {
this.handlerPolygon.isDrawing && this.tooltip.showAt(windowPosition, '<p>绘制阴影分析区域(右键结束绘制)</p>');
});
this.handlerPolygon.drawEvt.addEventListener(result => {
this.tooltip.setVisible(false);
this.points.length = 0;
var polygon = result.object;
if(!polygon) return;
polygon.show = false;
this.handlerPolygon.polyline.show = false;
var positions = [].concat(polygon.positions);
positions = Cesium.arrayRemoveDuplicates(positions, Cesium.Cartesian3.equalsEpsilon);
//遍历多边形，取出所有点
for(var i = 0, len = positions.length; i < len; i++) {
//转化为经纬度，并加入至临时数组
var cartographic = Cesium.Cartographic.fromCartesian(polygon.positions[i]);
var longitude = Cesium.Math.toDegrees(cartographic.longitude);
var latitude = Cesium.Math.toDegrees(cartographic.latitude);
this.points.push(longitude);
this.points.push(latitude);
}
//设置分析对象的开始结束时间
// var dateValue = $("#selDate").val();
var startTime = new Date();
startTime.setHours(8);
this.shadowQuery.startTime = Cesium.JulianDate.fromDate(startTime);
var endTime = new Date();
endTime.setHours(22);
this.shadowQuery.endTime = Cesium.JulianDate.fromDate(endTime);
this.setCurrentTime();
this.shadowQuery.spacing = 10;
this.shadowQuery.timeInterval = 60;
//设置分析区域、底部高程和拉伸高度
var bh = 20, eh = 20;
this.shadowQuery.qureyRegion({
position : this.points,
bottom : bh,
extend : eh
});
});
}
createTooltip(frameDiv) {
var Tooltip = function(frameDiv) {
var div = document.createElement('DIV');
div.className = "twipsy right";
var arrow = document.createElement('DIV');
arrow.className = "twipsy-arrow";
div.appendChild(arrow);
var title = document.createElement('DIV');
title.className = "twipsy-inner";
div.appendChild(title);
this._div = div;
this._title = title;
this.message = '';
frameDiv.appendChild(div);
var that = this;
div.onmousemove = function(evt){
that.showAt({
x : evt.clientX,
y : evt.clientY
}, that.message);
};
};
Tooltip.prototype.setVisible = function(visible) {
this._div.style.display = visible ? 'block' : 'none';
};
Tooltip.prototype.showAt = function(position, message) {
if(position && message) {
this.setVisible(true);
this._title.innerHTML = message;
this._div.style.left = position.x + 10 + "px";
this._div.style.top = (position.y - this._div.clientHeight / 2) + "px";
this.message = message;
}
};
return new Tooltip(frameDiv);
}
shadowAnalysis() {
this.handlerPolygon.deactivate();
this.handlerPolygon.activate();
}
sunlight() {
var startTime = new Date(), endTime = new Date(), shour = 8, ehour = 22, nTimer = 0.0;
if(shour > ehour) return;
this.shadowQuery.qureyRegion({
position : [0, 0],
bottom : 0,
extend : 0
});
var nIntervId = setInterval(function() {
if(shour < ehour) {
startTime.setHours(shour);
startTime.setMinutes(nTimer);
objectManage.viewer.clock.currentTime = Cesium.JulianDate.fromDate(startTime);
nTimer += 10.0;
if(nTimer > 60.0){
shour += 1.0;
nTimer = 0.0;
}
}else {
clearInterval(nIntervId);
this.shadowQuery.qureyRegion({
position : points,
bottom : 20,
extend : 20
});
}
}, 500);
}
clear() {
this.handlerPolygon.deactivate();
this.handlerPolygon.polygon.show = false;
this.handlerPolygon.polyline.show = false;
// $('#shadowRadioBox').css('display', 'none');
objectManage.viewer.entities.removeAll();
this.shadowQuery.qureyRegion({
position : [0, 0],
bottom : 0,
extend : 0
});
}
remove() {
this.points = [];
this.shadowQuery.destroy();
this.shadowQuery = new Cesium.ShadowQueryPoints(objectManage.viewer.scene);
this.shadowQuery.build();
}
}