createPolyline.js
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import movePrompt from './MovePrompt';
import addCompany from './addCompany';
export default class CreatePolyline {
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.polyline = null;
this.positions = [];
this.style = style;
this.floatPoint = null;
this.linePointArr = [];
this.modifyPoint = null;
this.state = 0;
//初始化鼠标提示框
this.prompt = new movePrompt.movePrompt(viewer);
// this.prompt.updatePrompt({x: 495, y: 407}, "单击开始绘制");
}
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.polyline]);
if (that.positions.length == 0) {
that.positions.push(cartesian.clone());
that.floatPoint = addCompany.createPoint.call(that, {position: cartesian.clone()});
}
that.positions.push(cartesian);
var point = addCompany.createPoint.call(that, {position: cartesian});
point.wz = that.linePointArr.length;
that.linePointArr.push(point);
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);
this.handler.setInputAction(function (evt) { //移动时绘制线
if (that.positions.length < 1) {
that.prompt.updatePrompt(evt.endPosition, "单击开始绘制");
return;
}
that.prompt.updatePrompt(evt.endPosition, "单击新增，右键结束");
var cartesian = that.getCatesian3FromPX(evt.endPosition, that.viewer, [that.polyline]);
if (that.floatPoint) that.floatPoint.position.setValue(cartesian);
if (that.positions.length == 2) {
if (!Cesium.defined(that.polyline)) {
that.polyline = addCompany.createPolyline.call(that);
}
}
if (that.polyline) {
that.positions.pop();
that.positions.push(cartesian);
}
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
this.handler.setInputAction(function (evt) { //单机开始绘制
if (!that.polyline) {
return;
}
var cartesian = that.getCatesian3FromPX(evt.position, that.viewer, [that.polyline]);
that.state = 1;
that.handler.destroy();
if (that.floatPoint) {
if (that.floatPoint) that.floatPoint.show = false;
that.floatPoint = null;
}
that.positions.pop();
that.positions.push(cartesian);
var point = addCompany.createPoint.call(that, {position: cartesian});
point.wz = that.linePointArr.length;
that.linePointArr.push(point);
if(that.prompt){
that.prompt.destroy();
that.prompt = null;
}
if (callBack) callBack(that.polyline);
}, Cesium.ScreenSpaceEventType.RIGHT_CLICK);
}
startModify(callback) {
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;
for (var i = 0; i < that.linePointArr.length; i++) {
var point = that.linePointArr[i];
if (point) point.show = true;
}
this.modifyHandler.setInputAction(function (evt) {
if(!that.polyline) return ;
var pick = that.viewer.scene.pick(evt.position);
if (Cesium.defined(pick) && pick.id) {
if (!pick.id.objId)
that.modifyPoint = pick.id;
that.forbidDrawWorld(true);
} else {
for (var i = 0; i < that.linePointArr.length; i++) {
var point = that.linePointArr[i];
if (point) point.show = false;
}
if (that.modifyHandler) {
that.modifyHandler.destroy();
that.modifyHandler = null;
if(callback) callback(that.polyline);
}
that.state = 2;
}
}, Cesium.ScreenSpaceEventType.LEFT_DOWN);
this.modifyHandler.setInputAction(function (evt) {
if (that.positions.length < 1 || !that.modifyPoint) return;
//that.modifyPrompt.updatePrompt(evt.endPosition, "鼠标拖动修改");
var cartesian = that.getCatesian3FromPX(evt.endPosition, that.viewer, [that.polyline, that.modifyPoint]);
if (cartesian) {
that.modifyPoint.position.setValue(cartesian);
that.positions[that.modifyPoint.wz] = cartesian;
}
}, Cesium.ScreenSpaceEventType.MOUSE_MOVE);
this.modifyHandler.setInputAction(function (evt) {
if (!that.modifyPoint) return;
var cartesian = that.getCatesian3FromPX(evt.position, that.viewer, [that.polyline, that.modifyPoint]);
that.modifyPoint.position.setValue(cartesian);
that.positions[that.modifyPoint.wz] = cartesian;
that.modifyPoint = null;
that.forbidDrawWorld(false);
}, Cesium.ScreenSpaceEventType.LEFT_UP);
}
endModify(callback) {
for (var i = 0; i < this.linePointArr.length; i++) {
var point = this.linePointArr[i];
if (point) point.show = false;
}
if (this.modifyHandler) {
this.modifyHandler.destroy();
this.modifyHandler = null;
if(callback) callback(this.polyline);
}
this.state = 2;
}
getPositions() {
return this.positions;
}
getAttr() {
if (!this.polyline) return;
var obj = {};
var line = this.polyline.polyline;
obj.width = line.width._value;
obj.clampToGround = line.clampToGround._value;
obj.color = line.material.color._value;
obj.lineType = "solid";
return obj;
}
setStyle(obj) {}
remove() {
if (this.polyline) {
this.state = 0;
this.viewer.entities.remove(this.polyline);
this.polyline = null;
}
}
setVisible(vis) {
this.polyline.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.linePointArr = [];
if (this.handler) {
this.handler.destroy();
this.handler = null;
}
if (this.modifyHandler) {
this.modifyHandler.destroy();
this.modifyHandler = null;
}
if (this.polyline) {
this.viewer.entities.remove(this.polyline);
this.polyline = null;
}
if (this.floatPoint) {
this.viewer.entities.remove(this.floatPoint);
this.floatPoint = null;
}
this.positions = [];
this.style = null;
for (var i = 0; i < this.linePointArr.length; i++) {
var point = this.linePointArr[i];
this.viewer.entities.remove(point);
}
this.linePointArr = [];
this.modifyPoint = null;
if (this.prompt) this.prompt.destroy();
//if (this.modifyPrompt) this.modifyPrompt.destroy();
}
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;
}
}