diff --git a/intersectTests.js b/intersectTests.js
index 6fad302..7a3501b 100644
--- a/intersectTests.js
+++ b/intersectTests.js
@@ -501,7 +501,8 @@ function doRandomTests( testdata ){
       ixsfat = getIntersections2( p1, p2 );
       t2 = (getTimestamp() - st);
       // Check against paperjs output
-      var found = 0, tol = 1;
+      // tol - tolerence for computed points with in 1/10 th of a pixel
+      var found = 0, tol = 0.1;
       if( ixsfat.length === ixspaper.length ){
         for(i=0, l=ixsfat.length; i<l; i++){
           pa = ixsfat[i].point;
@@ -668,82 +669,158 @@ function annotateCurve( crv, t, c, tc, remove ) {
 
 
 // Plot the run times
-  function plotDataRandom( testdata ){
-    var x = 80.5, y = 15.5, width = 500, height = 190, i, txt, ny,
-      yy = y + height, xx = x + width;
-    var ppaper = new Path(), pfat = new Path();
-    var max = testdata.reduce(function( a, b ){ return Math.max( a, b.paperTime, b.fatTime ); }, 0) + 20;
-    testdata.sort( function(a,b){ return a.ratio - b.ratio; } );
-    var vscale = height / max, hscale = width / testdata.length;
-    var caxes = '#999', ctxt = '#222', cpaper = '#268BD2', cfat = '#D33682';
-    new Path.Line( x, yy, xx, yy ).style.strokeColor = caxes;
-    new Path.Line( x, yy, x, y ).style.strokeColor = caxes;
-    for( i = 0; i < 10 ; i++ ){
-      ny = yy - vscale * max * i / 10;
-      new Path.Line( x, ny, x-5, ny ).style.strokeColor = caxes;
-      txt = new PointText( [x-10, ny] );
-      txt.justification = 'right';
-      txt.fillColor = ctxt;
-      txt.content = (max * i / 10).toFixed(1) + ((!i)? ' ms' : '');
-    }
-    txt = new PointText([xx + 20, yy + 18 ]);
-    txt.justification = 'left';
+function plotDataRandom( testdata ){
+  var x = 80.5, y = 15.5, width = 500, height = 190, i, txt, ny,
+    yy = y + height, xx = x + width;
+  var ppaper = new Path(), pfat = new Path();
+  var max = testdata.reduce(function( a, b ){ return Math.max( a, b.paperTime, b.fatTime ); }, 0) + 20;
+  testdata.sort( function(a,b){ return a.ratio - b.ratio; } );
+  var vscale = height / max, hscale = width / testdata.length;
+  var caxes = '#999', ctxt = '#222', cpaper = '#268BD2', cfat = '#D33682';
+  new Path.Line( x, yy, xx, yy ).style.strokeColor = caxes;
+  new Path.Line( x, yy, x, y ).style.strokeColor = caxes;
+  for( i = 0; i < 10 ; i++ ){
+    ny = yy - vscale * max * i / 10;
+    new Path.Line( x, ny, x-5, ny ).style.strokeColor = caxes;
+    txt = new PointText( [x-10, ny] );
+    txt.justification = 'right';
+    txt.fillColor = ctxt;
+    txt.content = (max * i / 10).toFixed(1) + ((!i)? ' ms' : '');
+  }
+  txt = new PointText([xx + 20, yy + 18 ]);
+  txt.justification = 'left';
+  txt.fillColor = ctxt;
+  txt.content = 'ixs / curve';
+  txt = new PointText([xx + 20, yy + 40]);
+  txt.justification = 'left';
+  txt.fillColor = '#999';
+  txt.content = '( Total Curves )';
+  var vx = x, step = 15, count = 0;
+  var avgPaper = 0, avgFat = 0;
+  testdata.map(function(data){
+    avgPaper += data.paperTime;
+    ny = yy - (data.paperTime + data.fatTime) * vscale;
+    ppaper.add( new Segment([vx, ny]) );
+    avgFat += data.fatTime;
+    ny = yy - (data.fatTime) * vscale;
+    pfat.add( new Segment([vx, ny]) );
+
+    new Path.Line( vx, yy, vx, yy + 5 + ((count%2)? step:0) ).style.strokeColor = caxes;
+    txt = new PointText( [vx, yy+18 + ((count%2)? step:0) ] );
+    txt.justification = 'center';
     txt.fillColor = ctxt;
-    txt.content = 'ixs / curve';
-    txt = new PointText([xx + 20, yy + 40]);
+    txt.content = data.ratio.toFixed(1);
+    txt = new PointText( [vx -5, yy+40 ] );
     txt.justification = 'left';
     txt.fillColor = '#999';
-    txt.content = '( Total Curves )';
-    var vx = x, step = 15, count = 0;
-    var avgPaper = 0, avgFat = 0;
-    testdata.map(function(data){
-      avgPaper += data.paperTime;
-      ny = yy - (data.paperTime + data.fatTime) * vscale;
-      ppaper.add( new Segment([vx, ny]) );
-      avgFat += data.fatTime;
-      ny = yy - (data.fatTime) * vscale;
-      pfat.add( new Segment([vx, ny]) );
+    txt.content = data.curves;
+    txt.rotate( 90, [vx-5, yy+40 ] );
 
-      new Path.Line( vx, yy, vx, yy + 5 + ((count%2)? step:0) ).style.strokeColor = caxes;
-      txt = new PointText( [vx, yy+18 + ((count%2)? step:0) ] );
-      txt.justification = 'center';
-      txt.fillColor = ctxt;
-      txt.content = data.ratio.toFixed(1);
-      txt = new PointText( [vx -5, yy+40 ] );
-      txt.justification = 'left';
-      txt.fillColor = '#999';
-      txt.content = data.curves;
-      txt.rotate( 90, [vx-5, yy+40 ] );
+    if( !data.success ){
+      var p = new Path.Line( vx, y, vx, yy );
+      p.style.strokeWidth = 5;
+      p.style.strokeColor = '#f00';
+    }
+    ++count;
+    vx += hscale;
+  });
+  ppaper.smooth();
+  ppaper.style.strokeWidth = 2;
+  ppaper.style.strokeColor = cpaper;
+  pfat.smooth();
+  pfat.style.strokeWidth = 2;
+  pfat.style.strokeColor = cfat;
+
+  avgPaper/= testdata.length;
+  avgFat/= testdata.length;
+  ny = Math.round(yy - avgPaper * vscale) + 0.5;
+  new Path.Line(x, ny, xx, ny).style.strokeColor = cpaper;
+  txt = new PointText( [xx, ny] );
+  txt.justification = 'right';
+  txt.fillColor = cpaper;
+  txt.content = avgPaper.toFixed(1);
+  ny = Math.round(yy - avgFat * vscale) + 0.5;
+  new Path.Line(x, ny, xx, ny).style.strokeColor = cfat;
+  txt = new PointText( [xx, ny] );
+  txt.justification = 'right';
+  txt.fillColor = cfat;
+  txt.content = avgFat.toFixed(1);
 
-      if( !data.success ){
-        var p = new Path.Line( vx, y, vx, yy );
-        p.style.strokeWidth = 5;
-        p.style.strokeColor = '#f00';
-      }
-      ++count;
-      vx += hscale;
-    });
-    ppaper.smooth();
-    ppaper.style.strokeWidth = 2;
-    ppaper.style.strokeColor = cpaper;
-    pfat.smooth();
-    pfat.style.strokeWidth = 2;
-    pfat.style.strokeColor = cfat;
+  view.draw();
+}
 
-    avgPaper/= testdata.length;
-    avgFat/= testdata.length;
-    ny = Math.round(yy - avgPaper * vscale) + 0.5;
-    new Path.Line(x, ny, xx, ny).style.strokeColor = cpaper;
-    txt = new PointText( [xx, ny] );
-    txt.justification = 'right';
-    txt.fillColor = cpaper;
-    txt.content = avgPaper.toFixed(1);
-    ny = Math.round(yy - avgFat * vscale) + 0.5;
-    new Path.Line(x, ny, xx, ny).style.strokeColor = cfat;
-    txt = new PointText( [xx, ny] );
-    txt.justification = 'right';
-    txt.fillColor = cfat;
-    txt.content = avgFat.toFixed(1);
 
+
+function drawFatline( v1 ) {
+    function signum(num) {
+        return ( num > 0 )? 1 : ( num < 0 )? -1 : 0;
+    }
+    var l = new Line( [v1[0], v1[1]], [v1[6], v1[7]], false );
+    var p1 = new Point( v1[2], v1[3] ), p2 = new Point( v1[4], v1[5] );
+    var d1 = l.getSide( p1 ) * l.getDistance( p1 ) || 0;
+    var d2 = l.getSide( p2 ) * l.getDistance( p2 ) || 0;
+    var dmin, dmax;
+    if( d1 * d2 > 0){
+        // 3/4 * min{0, d1, d2}
+        dmin = 0.75 * Math.min( 0, d1, d2 );
+        dmax = 0.75 * Math.max( 0, d1, d2 );
+    } else {
+        // 4/9 * min{0, d1, d2}
+        dmin = 4 * Math.min( 0, d1, d2 ) / 9.0;
+        dmax = 4 * Math.max( 0, d1, d2 ) / 9.0;
+    }
+    var ll = new Path.Line( v1[0], v1[1], v1[6], v1[7] );
+    window.__p3.push( ll );
+    window.__p3[window.__p3.length-1].style.strokeColor = new Color( 0,0,0.9, 0.8);
+    var lp1 = ll.segments[0].point;
+    var lp2 = ll.segments[1].point;
+    var pm = l.vector, pm1 = pm.rotate( signum( dmin ) * -90 ), pm2 = pm.rotate( signum( dmax ) * -90 );
+    var p11 = lp1.add( pm1.normalize( Math.abs(dmin) ) );
+    var p12 = lp2.add( pm1.normalize( Math.abs(dmin) ) );
+    var p21 = lp1.add( pm2.normalize( Math.abs(dmax) ) );
+    var p22 = lp2.add( pm2.normalize( Math.abs(dmax) ) );
+    window.__p3.push( new Path.Line( p11, p12 ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = new Color( 0,0,0.9);
+    window.__p3.push( new Path.Line( p21, p22 ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = new Color( 0,0,0.9);
+}
+
+function plotD_vs_t( x, y, arr, arr2, v, dmin, dmax, tmin, tmax, yscale, tvalue ){
+    yscale = yscale || 1;
+    new Path.Line( x, y-100, x, y+100 ).style.strokeColor = '#aaa';
+    new Path.Line( x, y, x + 200, y ).style.strokeColor = '#aaa';
+
+    var clr = (tvalue)? '#a00' : '#00a';
+    if( window.__p3 ) window.__p3.map(function(a){a.remove();});
+
+    window.__p3 = [];
+
+    drawFatline( v );
+
+    window.__p3.push( new Path.Line( x, y + dmin * yscale, x + 200, y + dmin * yscale ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = '#000'
+    window.__p3.push( new Path.Line( x, y + dmax * yscale, x + 200, y + dmax * yscale ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = '#000'
+    window.__p3.push( new Path.Line( x + tmin * 190, y-100, x + tmin * 190, y+100 ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = clr
+    window.__p3.push( new Path.Line( x + tmax * 190, y-100, x + tmax * 190, y+100 ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = clr
+
+    for (var i = 0; i < arr.length; i++) {
+        window.__p3.push( new Path.Line( new Point( x + arr[i][0] * 190, y + arr[i][1] * yscale ),
+         new Point( x + arr[i][2] * 190, y + arr[i][3] * yscale ) ) );
+        window.__p3[window.__p3.length-1].style.strokeColor = '#999';
+    }
+    var pnt = [];
+    var arr2x = [ 0.0, 0.333333333, 0.6666666666, 1.0 ];
+    for (var i = 0; i < arr2.length; i++) {
+        pnt.push( new Point( x + arr2x[i] * 190, y + arr2[i] * yscale ) );
+        window.__p3.push( new Path.Circle( pnt[pnt.length-1], 2 ) );
+        window.__p3[window.__p3.length-1].style.fillColor = '#000'
+    }
+    // var pth = new Path( pnt[0], pnt[1], pnt[2], pnt[3] );
+    // pth.closed = true;
+    window.__p3.push( new Path( new Segment(pnt[0], null, pnt[1].subtract(pnt[0])), new Segment( pnt[3], pnt[2].subtract(pnt[3]), null ) ) );
+    window.__p3[window.__p3.length-1].style.strokeColor = clr
     view.draw();
-  }
\ No newline at end of file
+}