ArcGIS js api 4.x 淹没分析 、水淹分析

效果图如下：

代码如下

console.log('459584547@qq.com');function gradientColor(startColor,endColor,step){startRGB = this.colorRgb(startColor);//转换为rgb数组模式startR = startRGB[0];startG = startRGB[1];startB = startRGB[2];endRGB = this.colorRgb(endColor);endR = endRGB[0];endG = endRGB[1];endB = endRGB[2];sR = (endR-startR)/step;//总差值sG = (endG-startG)/step;sB = (endB-startB)/step;var colorArr = [];for(var i=0;i<step;i++){//计算每一步的hex值 var hex = this.colorHex('rgb('+parseInt((sR*i+startR))+','+parseInt((sG*i+startG))+','+parseInt((sB*i+startB))+')');colorArr.push(hex);}return colorArr;}// 将hex表示方式转换为rgb表示方式(这里返回rgb数组模式)gradientColor.prototype.colorRgb = function(sColor){var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;var sColor = sColor.toLowerCase();if(sColor && reg.test(sColor)){if(sColor.length === 4){var sColorNew = "#";for(var i=1; i<4; i+=1){sColorNew += sColor.slice(i,i+1).concat(sColor.slice(i,i+1));}sColor = sColorNew;}//处理六位的颜色值var sColorChange = [];for(var i=1; i<7; i+=2){sColorChange.push(parseInt("0x"+sColor.slice(i,i+2)));}return sColorChange;}else{return sColor;}};// 将rgb表示方式转换为hex表示方式gradientColor.prototype.colorHex = function(rgb){var _this = rgb;var reg = /^#([0-9a-fA-f]{3}|[0-9a-fA-f]{6})$/;if(/^(rgb|RGB)/.test(_this)){var aColor = _this.replace(/(?:(|)|rgb|RGB)*/g,"").split(",");var strHex = "#";for(var i=0; i<aColor.length; i++){var hex = Number(aColor[i]).toString(16);hex = hex<10 ? 0+''+hex :hex;// 保证每个rgb的值为2位if(hex === "0"){hex += hex;}strHex += hex;}if(strHex.length !== 7){strHex = _this;}return strHex;}else if(reg.test(_this)){var aNum = _this.replace(/#/,"").split("");if(aNum.length === 6){return _this;}else if(aNum.length === 3){var numHex = "#";for(var i=0; i<aNum.length; i+=1){numHex += (aNum[i]+aNum[i]);}return numHex;}}else{return _this;}}