d1f8bd40
 Alexey Boroda
first commit
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1
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(function($){var options={series:{curvedLines:{active:false,apply:false,fit:false,curvePointFactor:20,fitPointDist:undefined}}};function init(plot){plot.hooks.processOptions.push(processOptions);function processOptions(plot,options){if(options.series.curvedLines.active){plot.hooks.processDatapoints.unshift(processDatapoints);}}function processDatapoints(plot,series,datapoints){var nrPoints=datapoints.points.length/datapoints.pointsize;var EPSILON=0.5;if(series.curvedLines.apply==true&&series.originSeries===undefined&&nrPoints>(1+EPSILON)){if(series.lines.fill){var pointsTop=calculateCurvePoints(datapoints,series.curvedLines,1),pointsBottom=calculateCurvePoints(datapoints,series.curvedLines,2);datapoints.pointsize=3;datapoints.points=[];var j=0;var k=0;var i=0;var ps=2;while(i<pointsTop.length||j<pointsBottom.length){if(pointsTop[i]==pointsBottom[j]){datapoints.points[k]=pointsTop[i];datapoints.points[k+1]=pointsTop[i+1];datapoints.points[k+2]=pointsBottom[j+1];j+=ps;i+=ps;}else{if(pointsTop[i]<pointsBottom[j]){datapoints.points[k]=pointsTop[i];datapoints.points[k+1]=pointsTop[i+1];datapoints.points[k+2]=k>0?datapoints.points[k-1]:null;i+=ps;}else{datapoints.points[k]=pointsBottom[j];datapoints.points[k+1]=k>1?datapoints.points[k-2]:null;datapoints.points[k+2]=pointsBottom[j+1];j+=ps;}}k+=3;}}else{if(series.lines.lineWidth>0){datapoints.points=calculateCurvePoints(datapoints,series.curvedLines,1);datapoints.pointsize=2;}}}}function calculateCurvePoints(datapoints,curvedLinesOptions,yPos){var points=datapoints.points,ps=datapoints.pointsize;var num=curvedLinesOptions.curvePointFactor*(points.length/ps);var xdata=new Array;var ydata=new Array;var curX=-1;var curY=-1;var j=0;if(curvedLinesOptions.fit){var fpDist;if(typeof curvedLinesOptions.fitPointDist=="undefined"){var minX=points[0];var maxX=points[points.length-ps];fpDist=(maxX-minX)/(500*100);}else{fpDist=curvedLinesOptions.fitPointDist;}for(var i=0;i<points.length;i+=ps){var frontX;var backX;curX=i;curY=i+yPos;frontX=points[curX]-fpDist;backX=points[curX]+fpDist;var factor=2;while(frontX==points[curX]||backX==points[curX]){frontX=points[curX]-(fpDist*factor);backX=points[curX]+(fpDist*factor);factor++;}xdata[j]=frontX;ydata[j]=points[curY];j++;xdata[j]=points[curX];ydata[j]=points[curY];j++;xdata[j]=backX;ydata[j]=points[curY];j++;}}else{for(var i=0;i<points.length;i+=ps){curX=i;curY=i+yPos;xdata[j]=points[curX];ydata[j]=points[curY];j++;}}var n=xdata.length;var y2=new Array();var delta=new Array();y2[0]=0;y2[n-1]=0;delta[0]=0;for(var i=1;i<n-1;++i){var d=(xdata[i+1]-xdata[i-1]);if(d==0){return[];}var s=(xdata[i]-xdata[i-1])/d;var p=s*y2[i-1]+2;y2[i]=(s-1)/p;delta[i]=(ydata[i+1]-ydata[i])/(xdata[i+1]-xdata[i])-(ydata[i]-ydata[i-1])/(xdata[i]-xdata[i-1]);delta[i]=(6*delta[i]/(xdata[i+1]-xdata[i-1])-s*delta[i-1])/p;}for(var j=n-2;j>=0;--j){y2[j]=y2[j]*y2[j+1]+delta[j];}var step=(xdata[n-1]-xdata[0])/(num-1);var xnew=new Array;var ynew=new Array;var result=new Array;xnew[0]=xdata[0];ynew[0]=ydata[0];result.push(xnew[0]);result.push(ynew[0]);for(j=1;j<num;++j){xnew[j]=xnew[0]+j*step;var max=n-1;var min=0;while(max-min>1){var k=Math.round((max+min)/2);if(xdata[k]>xnew[j]){max=k;}else{min=k;}}var h=(xdata[max]-xdata[min]);if(h==0){return[];}var a=(xdata[max]-xnew[j])/h;var b=(xnew[j]-xdata[min])/h;ynew[j]=a*ydata[min]+b*ydata[max]+((a*a*a-a)*y2[min]+(b*b*b-b)*y2[max])*(h*h)/6;result.push(xnew[j]);result.push(ynew[j]);}return result;}}$.plot.plugins.push({init:init,options:options,name:"curvedLines",version:"0.5"});})(jQuery);
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