createBillboard.js
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import movePrompt from './MovePrompt';
export default class CreateBillboard {
constructor(viewer, style) {
this.objId = Number((new Date()).getTime() + "" + Number(Math.random() * 1000).toFixed(0));
this.viewer = viewer;
this.handler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);
this.modifyHandler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);
this.state = 0; //1为新增 2为编辑 0为清除
this.image = style.image || "content/images/map3d/mark1.png";
this.style = style;
this.billboardArg = {};
this.billboard = null;
this.openModify = false;
if (style) {
var haveImage = false;
for (var i in style) {
if (i == "image" && style[i]) {
haveImage = true;
}
if (style[i]) this.billboardArg[i] = style[i];
}
} else {
console.warn("未设置billboard的参数！");
return;
}
this.prompt = new movePrompt.movePrompt(viewer);
}
start(callBack) {
var that = this;
this.handler.setInputAction(function(evt) { //单机开始绘制
var cartesian = that.getCatesian3FromPX(evt.position, that.viewer,[]);
that.billboard = that.createBillboard(cartesian);
that.state = 1;
that.handler.destroy();
if (that.prompt) {
that.prompt.destroy();
that.prompt = null;
}
if (callBack) callBack(that.billboard);
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
this.handler.setInputAction(function(evt) { //单机开始绘制
that.prompt.updatePrompt(evt.endPosition, "单击新增");
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
}
createByPositions(lnglatArr, callBack) {
if (!lnglatArr) return;
var position = Cesium.Cartesian3.fromDegrees(lnglatArr[0], lnglatArr[1],lnglatArr[2]);
if (!position) return;
this.billboard = this.createBillboard(position);
callBack(this.billboard);
this.state = 1;
}
startModify() {
if (this.state != 2 && this.state != 1) return; //表示还没绘制完成
if (!this.modifyHandler) this.modifyHandler = new Cesium.ScreenSpaceEventHandler(this.viewer.scene.canvas);
var that = this;
this.modifyHandler.setInputAction(function(evt) {
var pick = that.viewer.scene.pick(evt.position);
if (Cesium.defined(pick) && pick.id) {
if (!pick.id.objId)
that.forbidDrawWorld(true);
that.openModify = true;
that.forbidDrawWorld(true);
that.state = 2;
} else {
//if(that.modifyPrompt) that.modifyPrompt.destroy();
}
}, Cesium.ScreenSpaceEventType.LEFT_DOWN);
this.modifyHandler.setInputAction(function(evt) { //移动时绘制线
if (!that.billboard || !that.openModify) return;
var cartesian = that.getCatesian3FromPX(evt.endPosition, that.viewer,[]);
if (that.billboard) {
//that.modifyPrompt.updatePrompt(evt.endPosition, "鼠标拖动修改");
that.billboard.position.setValue(cartesian);
}
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
this.modifyHandler.setInputAction(function(evt) { //移动时绘制线
if (!that.billboard || !that.openModify) return;
that.openModify = false;
that.forbidDrawWorld(false);
if (that.modifyHandler) {
that.modifyHandler.destroy();
that.modifyHandler = null;
}
}, Cesium.ScreenSpaceEventType.LEFT_UP);
}
endModify(callback) {
if (this.modifyHandler) {
this.modifyHandler.destroy();
this.modifyHandler = null;
if (callback) callback(this.billboard);
}
this.state = 2;
}
createBillboard(cartesian) {
if (!cartesian) return;
var billboard = this.viewer.entities.add({
position: cartesian,
billboard: {
image: 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABgAAAAYCAYAAADgdz34AAABMElEQVRIS+2VO0oEQRCGv38RBdFDGQumgijeQFTMjDUQr6CRsgeQDfQCmoqBZkYeQF0f+Cop6AYfa8/UOGtkw8Aw0/19XVVNlxjyUIlvZlPAGjAn6brJXn4UmNk4cJeeDtAFtiWdR0QlgUNfgDzH35+BU2AT6El6q5JFBB9ZN8ADsAXslNLXVJBlnkKPdB9YkdT/GtFvBZnnqepI+sZrQ+C1GQEWJO21GcEr8AQcAquSLgcVvEkElgp8AixLOiudpKjAi3gBLEk6rjqi/r+uwMFXCXxUB5zn1BHcJ/BuBBwR+B00L6n3L/iUATMbAx7TxxlJB62myGFmtgjMAtOS/PyHR7HhhGkDFvy9wMw2UpscDUTgd5J3u/XKy87MboGJADxP7UuarCMYbgQNdl5c8g7JKYAZpEkyjAAAAABJRU5ErkJggg==',
heightReference: this.style.heightReference || Cesium.HeightReference.NONE,
disableDepthTestDistance:Number.MAX_VALUE,
color: Cesium.Color.RED
}
})
billboard.objId = this.objId;
return billboard;
}
getPositions() {
return this.billboard.position;
}
setStyle(obj) {}
remove() {
if (this.billboard) {
this.state = 0;
this.viewer.entities.remove(this.billboard);
this.billboard = null;
}
}
setVisible(vis) {
this.billboard.show = vis;
}
forbidDrawWorld(isForbid) {
this.viewer.scene.screenSpaceCameraController.enableRotate = !isForbid;
this.viewer.scene.screenSpaceCameraController.enableTilt = !isForbid;
this.viewer.scene.screenSpaceCameraController.enableTranslate = !isForbid;
this.viewer.scene.screenSpaceCameraController.enableInputs = !isForbid;
}
destroy() {
this.openModify = false;
if (this.handler) {
this.handler.destroy();
this.handler = null;
}
if (this.modifyHandler) {
this.modifyHandler.destroy();
this.modifyHandler = null;
}
if (this.billboard) {
this.viewer.entities.remove(this.billboard);
this.billboard = null;
}
this.style = null;
if (this.prompt) {
that.prompt.destroy();
this.prompt = null;
}
}
getCatesian3FromPX(px, viewer, entitys) {
var picks = viewer.scene.drillPick(px);
this.viewer.scene.render();
var cartesian;
var isOn3dtiles = false;
for (var i = 0; i < picks.length; i++) {
var isContinue = false;
for (var step = 0; step < entitys.length; step++) {
if (entitys[step] && picks[i].id && entitys[step].objId == picks[i].id.objId) {
isContinue = true;
break;
}
}
if (isContinue) continue;
if ((picks[i] && picks[i].primitive) || picks[i] instanceof Cesium.Cesium3DTileFeature) { //模型上拾取
isOn3dtiles = true;
}
}
if (isOn3dtiles) {
cartesian = viewer.scene.pickPosition(px);
} else {
var ray = viewer.camera.getPickRay(px);
if (!ray) return null;
cartesian = viewer.scene.globe.pick(ray, viewer.scene);
}
return cartesian;
}
}