mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 09:14:17 +00:00
357 lines
12 KiB
JavaScript
357 lines
12 KiB
JavaScript
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(function () {
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function A(option) {
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var t = this;
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t.div = null;
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t.map = null;
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t.data = [];
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t.d3Layer = null;
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t._svg = null;
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t._tempData=null;
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t._stepPointCount = 4;//每一步所走过的点
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t._stepPointCountOffset = 5;//每一步所走过的点范围
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t._minStepLength = 5;//每一段的长度
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t._maxStepLength = 15;
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t._stepStatus = {};
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t._stepPointMargin =3;
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t._stepNum =3;//有多少个小段
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t._stepOffset = 30; //点的偏移量
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t._maxSpeed = 500;
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t._minSpeed = 200;
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t._startOpacity = 0.1;
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t._endOpacity = 0.9;
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t._pointCountMultiple = 2;
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t._mindelay = 30;
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t._maxdelay = 300;
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t._startColor=187;
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t._endColor=94;
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t._isStop = false;
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t._isMove = false;
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t._isAddData = false;
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t.__isStop = null;
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for (var key in option) {
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t[key] = option[key];
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}
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t.createSVG();
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t.d3Layer.events.on({moveend: function (evt) {
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//console.log("moveend");
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if(t._isMove){
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t._isMove = false;
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//t._isStop = t.__isStop;
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//t.__isStop = null;
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}
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t._refresh(evt);
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}});
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// t.d3Layer.events.on({movestart: function (evt) {
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// console.log("movestart");
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// t._isStop = true;
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// }});
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t.d3Layer.events.on({move: function (evt) {
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//console.log("move");
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if(!t._isMove){
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//t.__isStop = t._isStop;
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//t._isStop = true;
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t._isMove = true;
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//t._svg.selectAll("path").style("display","none");
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}
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t._svg.selectAll("path").style("display","none");
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}});
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}
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var P = A.prototype;
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P.createSVG = function () {
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var t = this;
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var size = t.map.getSize();
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t._svg = d3.select(t.div)
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.append("svg")
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.attr("width", size.w)
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.attr("height", size.h);
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//d3.select(t.div).html("<span id='fefe'></span>");
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}
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P.addData = function(data){
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var t = this;
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if(t._isAddData){
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return;
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}
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else{
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t._isAddData = true;
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}
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t._isStop = false;
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t.data = data;
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var defs = d3.select("svg")
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.append("defs");
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var linearGradient = defs.append("linearGradient").attr({
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id:"orange_red",
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x1:"0%",
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y1:"0%",
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x2:"100%",
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y2:"0%"
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});
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linearGradient.append("stop").attr({
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offset:"0%"
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})
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.style({
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"stop-color":"rgb("+t._startColor+","+t._startColor+","+t._startColor+")",
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"stop-opacity":1
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});
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linearGradient.append("stop").attr({
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offset:"100%"
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})
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.style({
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"stop-color":"rgb("+t._endColor+","+t._endColor+","+t._endColor+")",
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"stop-opacity":1
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});
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var tempData = t._tempData = t.getPosition(data);
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var bindData = [];
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for(var i=0;i<data.length;i+=2){ //data.length
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bindData.push(i);
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}
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t._svg.selectAll('path')
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.data(bindData)
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.enter()
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.append("path")
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.style("stroke", "url(#orange_red)")
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.style("stroke-width", 1)
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.style("fill", "none")
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.style("opacity",0.9)
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.call(function(selection){
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t.lineAnimate(selection);
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});
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}
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P.getPath = function(index){
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var t = this;
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var line = t._tempData[index];
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var length = line.length;
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var status = t._stepStatus[index];
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var pointStrArray = [];
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for(var i=0;i<status.length;i++){ //status.length
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var statusi = status[i];
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var start = statusi.start;
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var pointCount =statusi.pointCount;
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start = start+pointCount;
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var end = statusi.end;
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var stepLength = statusi.stepLength;
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if(start>=length){
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start = length;
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}
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if(start-end<=stepLength){
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}
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else{
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end = end+pointCount;
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}
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var newStart = start;
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var offsetX =statusi.offsetX;
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var offsetY = statusi.offsetY;
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pointStrArray.push("M"+offset(line[end],offsetX,offsetY).join(" "));
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if(stepLength>=4){
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for(var j=end+1;j<end+stepLength;j++){
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if(j<start){
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pointStrArray.push((j==0?"C":"")+offset(line[j],offsetX,offsetY).join(" "));
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}
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else{
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pointStrArray.push((j==0?"C":"")+offset(line[start-1],offsetX,offsetY).join(" "));
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}
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}
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}
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else{
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for(var j=end+1;j<end+stepLength;j++){
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if(j<start){
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pointStrArray.push("L"+offset(line[j],offsetX,offsetY).join(" "));
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}
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else{
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pointStrArray.push("L"+offset(line[start-1],offsetX,offsetY).join(" "));
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}
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}
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}
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statusi.start = newStart;
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statusi.end = end;
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}
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function offset(point,offsetX,offsetY){
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return [point[0]+offsetX,point[1]+offsetY];
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}
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return pointStrArray.join(" ");// + " Z"
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}
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P.lineAnimate = function(selection) {
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var t = this;
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selection.style("opacity", t._startOpacity);
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// window.setTimeout(function(selection){
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// return function(){
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//
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// }
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// }(selection),Math.round(t._mindelay+Math.random()*(t._maxdelay- t._mindelay)));
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selection
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.transition()
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.duration(function(){
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return Math.round(t._mindelay+Math.random()*(t._maxdelay- t._mindelay))
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})
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.attr("d",function(d){
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var line = t._tempData[d];
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var length = line.length;
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var stepDistance = t._stepPointCount+ t._stepPointMargin;
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var count = t._stepNum;
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t._stepStatus[d] = [];
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for(var i=0;i<count;i++){
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var start = stepDistance*i;
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if(start>=length){
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break;
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}
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var stepLength = t._minStepLength+Math.round(Math.random()*(t._maxStepLength- t._minStepLength));
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if(start+stepLength>=length){
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stepLength = length-start;
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}
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for(var j=0;j<t._pointCountMultiple;j++){
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t._stepStatus[d].push({
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start:start,
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end:start,
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offsetX:Math.round(Math.random()*t._stepOffset-t._stepOffset/2),
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offsetY:Math.round(Math.random()*t._stepOffset-t._stepOffset/2),
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pointCount: t._stepPointCount+Math.round(Math.random()*(t._stepPointCountOffset-t._stepPointCount)),
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stepLength:stepLength
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});
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}
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}
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t._stepStatus[d].speed = t._minSpeed + Math.round(Math.random()*(t._maxSpeed-t._minSpeed));
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var path = t.getPath(d);
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return path;
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})
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.call(function(selection){
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t.step(selection);
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});
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}
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P.step = function(selection){
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//console.log("step");
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var t = this;
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selection.transition()
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.ease('linear')
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.duration(function(d){
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return t._stepStatus[d].speed;
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})
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.attr("d",function(d){
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var path = t.getPath(d);
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return path;
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})
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.style("opacity",function(d){
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var status = t._stepStatus[d];
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var lastStart = status[status.length-1].start;
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var line = t._tempData[d];
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var length = line.length;
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var opacity = t._startOpacity + (lastStart/length)*(t._endOpacity- t._startOpacity);
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return opacity;
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})
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.each('end', function() {
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if(t._isStop)return;
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var obj = d3.select(this);
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var d = obj.data()[0];
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var status = t._stepStatus[d];
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var lastStart = status[status.length-1].start;
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var line = t._tempData[d];
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var length = line.length;
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if(lastStart>=length){
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obj
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.transition()
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.duration(500)
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.style('opacity', t._startOpacity)
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.each('end',function(){
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d3.select(this).call(function(selection){
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t.lineAnimate(selection);
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});
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});
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}
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else{
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obj.call(function(selection){
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t.step(selection);
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});
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}
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});
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}
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P.getPosition = function(datas){
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var tempDatas = [],t = this;
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if(datas){
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for(var i=0;i<datas.length;i++){
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var line = datas[i];
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var tempLine = [];
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for(var j=0;j<line.length;j++){
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var point = line[j];
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var tempPoint = this.d3Layer.getLayerPxFromLonLat(new SuperMap.LonLat(point[0],point[1]));
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tempLine.push([tempPoint.x,tempPoint.y]);
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}
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tempDatas.push(tempLine);
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}
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}
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return tempDatas;
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}
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P._refresh = function(evt){
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var t = this;
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var tempData = t._tempData = t.getPosition(t.data);
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if(tempData){
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if(t._isStop){
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t._svg.selectAll("path").attr("d",function(d){
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var path = t.getPath(d);
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return path;
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});
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t._svg.selectAll("path").style("display","block");
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}
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else{
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//if(evt.zoomChanged){
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t._svg.selectAll("path").style("display","none");
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//}
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t._svg.selectAll("path").attr("d",function(d){
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var path = t.getPath(d);
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return path;
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});
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t._isStop = true;
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setTimeout(function(){
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t._isStop = false;
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t._svg.selectAll("path")
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.attr("d",function(d){
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var path = t.getPath(d);
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return path;
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})
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.style("display","block")
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.call(function(selection){
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t.step(selection);
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});
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//if(evt.zoomChanged){
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t._svg.selectAll("path").style("display","block");
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//}
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},300);
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}
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}
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}
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P.clear = function(){
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var t = this;
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t._isStop = true;
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t._svg.selectAll("path").remove();
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t._svg.selectAll("defs").remove();
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t._isAddData = false;
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}
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P.stop = function(){
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this._isStop = true;
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}
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P.run = function(){
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var t = this;
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if(t._isStop){
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t._isStop = false;
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t._svg.selectAll("path").call(function(selection){
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t.step(selection);
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});
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}
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}
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window.D3WindMap = A;
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})()
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