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Copy pathD3WindMap.js
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357 lines (339 loc) · 11.7 KB
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(function () {
function A(option) {
var t = this;
t.div = null;
t.map = null;
t.data = [];
t.d3Layer = null;
t._svg = null;
t._tempData=null;
t._stepPointCount = 4;//每一步所走过的点
t._stepPointCountOffset = 5;//每一步所走过的点范围
t._minStepLength = 5;//每一段的长度
t._maxStepLength = 15;
t._stepStatus = {};
t._stepPointMargin =3;
t._stepNum =3;//有多少个小段
t._stepOffset = 30; //点的偏移量
t._maxSpeed = 500;
t._minSpeed = 200;
t._startOpacity = 0.1;
t._endOpacity = 0.9;
t._pointCountMultiple = 2;
t._mindelay = 30;
t._maxdelay = 300;
t._startColor=187;
t._endColor=94;
t._isStop = false;
t._isMove = false;
t._isAddData = false;
t.__isStop = null;
for (var key in option) {
t[key] = option[key];
}
t.createSVG();
t.d3Layer.events.on({moveend: function (evt) {
//console.log("moveend");
if(t._isMove){
t._isMove = false;
//t._isStop = t.__isStop;
//t.__isStop = null;
}
t._refresh(evt);
}});
// t.d3Layer.events.on({movestart: function (evt) {
// console.log("movestart");
// t._isStop = true;
// }});
t.d3Layer.events.on({move: function (evt) {
//console.log("move");
if(!t._isMove){
//t.__isStop = t._isStop;
//t._isStop = true;
t._isMove = true;
//t._svg.selectAll("path").style("display","none");
}
t._svg.selectAll("path").style("display","none");
}});
}
var P = A.prototype;
P.createSVG = function () {
var t = this;
var size = t.map.getSize();
t._svg = d3.select(t.div)
.append("svg")
.attr("width", size.w)
.attr("height", size.h);
//d3.select(t.div).html("<span id='fefe'></span>");
}
P.addData = function(data){
var t = this;
if(t._isAddData){
return;
}
else{
t._isAddData = true;
}
t._isStop = false;
t.data = data;
var defs = d3.select("svg")
.append("defs");
var linearGradient = defs.append("linearGradient").attr({
id:"orange_red",
x1:"0%",
y1:"0%",
x2:"100%",
y2:"0%"
});
linearGradient.append("stop").attr({
offset:"0%"
})
.style({
"stop-color":"rgb("+t._startColor+","+t._startColor+","+t._startColor+")",
"stop-opacity":1
});
linearGradient.append("stop").attr({
offset:"100%"
})
.style({
"stop-color":"rgb("+t._endColor+","+t._endColor+","+t._endColor+")",
"stop-opacity":1
});
var tempData = t._tempData = t.getPosition(data);
var bindData = [];
for(var i=0;i<data.length;i+=2){ //data.length
bindData.push(i);
}
t._svg.selectAll('path')
.data(bindData)
.enter()
.append("path")
.style("stroke", "url(#orange_red)")
.style("stroke-width", 1)
.style("fill", "none")
.style("opacity",0.9)
.call(function(selection){
t.lineAnimate(selection);
});
}
P.getPath = function(index){
var t = this;
var line = t._tempData[index];
var length = line.length;
var status = t._stepStatus[index];
var pointStrArray = [];
for(var i=0;i<status.length;i++){ //status.length
var statusi = status[i];
var start = statusi.start;
var pointCount =statusi.pointCount;
start = start+pointCount;
var end = statusi.end;
var stepLength = statusi.stepLength;
if(start>=length){
start = length;
}
if(start-end<=stepLength){
}
else{
end = end+pointCount;
}
var newStart = start;
var offsetX =statusi.offsetX;
var offsetY = statusi.offsetY;
pointStrArray.push("M"+offset(line[end],offsetX,offsetY).join(" "));
if(stepLength>=4){
for(var j=end+1;j<end+stepLength;j++){
if(j<start){
pointStrArray.push((j==0?"C":"")+offset(line[j],offsetX,offsetY).join(" "));
}
else{
pointStrArray.push((j==0?"C":"")+offset(line[start-1],offsetX,offsetY).join(" "));
}
}
}
else{
for(var j=end+1;j<end+stepLength;j++){
if(j<start){
pointStrArray.push("L"+offset(line[j],offsetX,offsetY).join(" "));
}
else{
pointStrArray.push("L"+offset(line[start-1],offsetX,offsetY).join(" "));
}
}
}
statusi.start = newStart;
statusi.end = end;
}
function offset(point,offsetX,offsetY){
return [point[0]+offsetX,point[1]+offsetY];
}
return pointStrArray.join(" ");// + " Z"
}
P.lineAnimate = function(selection) {
var t = this;
selection.style("opacity", t._startOpacity);
// window.setTimeout(function(selection){
// return function(){
//
// }
// }(selection),Math.round(t._mindelay+Math.random()*(t._maxdelay- t._mindelay)));
selection
.transition()
.duration(function(){
return Math.round(t._mindelay+Math.random()*(t._maxdelay- t._mindelay))
})
.attr("d",function(d){
var line = t._tempData[d];
var length = line.length;
var stepDistance = t._stepPointCount+ t._stepPointMargin;
var count = t._stepNum;
t._stepStatus[d] = [];
for(var i=0;i<count;i++){
var start = stepDistance*i;
if(start>=length){
break;
}
var stepLength = t._minStepLength+Math.round(Math.random()*(t._maxStepLength- t._minStepLength));
if(start+stepLength>=length){
stepLength = length-start;
}
for(var j=0;j<t._pointCountMultiple;j++){
t._stepStatus[d].push({
start:start,
end:start,
offsetX:Math.round(Math.random()*t._stepOffset-t._stepOffset/2),
offsetY:Math.round(Math.random()*t._stepOffset-t._stepOffset/2),
pointCount: t._stepPointCount+Math.round(Math.random()*(t._stepPointCountOffset-t._stepPointCount)),
stepLength:stepLength
});
}
}
t._stepStatus[d].speed = t._minSpeed + Math.round(Math.random()*(t._maxSpeed-t._minSpeed));
var path = t.getPath(d);
return path;
})
.call(function(selection){
t.step(selection);
});
}
P.step = function(selection){
//console.log("step");
var t = this;
selection.transition()
.ease('linear')
.duration(function(d){
return t._stepStatus[d].speed;
})
.attr("d",function(d){
var path = t.getPath(d);
return path;
})
.style("opacity",function(d){
var status = t._stepStatus[d];
var lastStart = status[status.length-1].start;
var line = t._tempData[d];
var length = line.length;
var opacity = t._startOpacity + (lastStart/length)*(t._endOpacity- t._startOpacity);
return opacity;
})
.each('end', function() {
if(t._isStop)return;
var obj = d3.select(this);
var d = obj.data()[0];
var status = t._stepStatus[d];
var lastStart = status[status.length-1].start;
var line = t._tempData[d];
var length = line.length;
if(lastStart>=length){
obj
.transition()
.duration(500)
.style('opacity', t._startOpacity)
.each('end',function(){
d3.select(this).call(function(selection){
t.lineAnimate(selection);
});
});
}
else{
obj.call(function(selection){
t.step(selection);
});
}
});
}
P.getPosition = function(datas){
var tempDatas = [],t = this;
if(datas){
for(var i=0;i<datas.length;i++){
var line = datas[i];
var tempLine = [];
for(var j=0;j<line.length;j++){
var point = line[j];
var tempPoint = this.d3Layer.getLayerPxFromLonLat(new SuperMap.LonLat(point[0],point[1]));
tempLine.push([tempPoint.x,tempPoint.y]);
}
tempDatas.push(tempLine);
}
}
return tempDatas;
}
P._refresh = function(evt){
var t = this;
var tempData = t._tempData = t.getPosition(t.data);
if(tempData){
if(t._isStop){
t._svg.selectAll("path").attr("d",function(d){
var path = t.getPath(d);
return path;
});
t._svg.selectAll("path").style("display","block");
}
else{
//if(evt.zoomChanged){
t._svg.selectAll("path").style("display","none");
//}
t._svg.selectAll("path").attr("d",function(d){
var path = t.getPath(d);
return path;
});
t._isStop = true;
setTimeout(function(){
t._isStop = false;
t._svg.selectAll("path")
.attr("d",function(d){
var path = t.getPath(d);
return path;
})
.style("display","block")
.call(function(selection){
t.step(selection);
});
//if(evt.zoomChanged){
t._svg.selectAll("path").style("display","block");
//}
},300);
}
}
}
P.clear = function(){
var t = this;
t._isStop = true;
t._svg.selectAll("path").remove();
t._svg.selectAll("defs").remove();
t._isAddData = false;
}
P.stop = function(){
this._isStop = true;
}
P.run = function(){
var t = this;
if(t._isStop){
t._isStop = false;
t._svg.selectAll("path").call(function(selection){
t.step(selection);
});
}
}
window.D3WindMap = A;
})()
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