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Commit c3a34cd6 authored by olau@iola.dk's avatar olau@iola.dk
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Support for specifying a bottom for each point for line charts when 

filling them, this means that an arbitrary bottom can be used
instead of just the x axis (based on patches patiently provided by
Roman V. Prikhodchenko).

New fillbetween plugin that can compute a bottom for a series from
another series, useful for filling areas between lines (see new
example percentiles.html for a use case).

More predictable handling of gaps for the stacking plugin, now all
undefined ranges are skipped.

Fixed problem with plugins adding options to the series objects.

Fixed a problem introduced in 0.6 with specifying a gradient with {
brightness: x, opacity: y }.


git-svn-id: https://flot.googlecode.com/svn/trunk@229 1e0a6537-2640-0410-bfb7-f154510ff394
parent 7cbc1416
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Showing with 362 additions and 69 deletions
API.txt
View file @ c3a34cd6
......@@ -52,8 +52,9 @@ drawing. As a special case, a null value for lines is interpreted as a
line segment end, i.e. the points before and after the null value are
not connected.
Lines and points take two coordinates. For bars, you can specify a
third coordinate which is the bottom of the bar (defaults to 0).
Lines and points take two coordinates. For filled lines and bars, you
can specify a third coordinate which is the bottom of the filled
area/bar (defaults to 0).
The format of a single series object is as follows:
......@@ -479,7 +480,7 @@ The most important options are "lines", "points" and "bars" that
specify whether and how lines, points and bars should be shown for
each data series. In case you don't specify anything at all, Flot will
default to showing lines (you can turn this off with
lines: { show: false}). You can specify the various types
lines: { show: false }). You can specify the various types
independently of each other, and Flot will happily draw each of them
in turn (this is probably only useful for lines and points), e.g.
......
NEWS.txt
View file @ c3a34cd6
Flot x.x
--------
Changes:
- Support for specifying a bottom for each point for line charts when
filling them, this means that an arbitrary bottom can be used
instead of just the x axis (based on patches patiently provided by
Roman V. Prikhodchenko).
- New fillbetween plugin that can compute a bottom for a series from
another series, useful for filling areas between lines (see new
example percentiles.html for a use case).
- More predictable handling of gaps for the stacking plugin, now all
undefined ranges are skipped.
Bug fixes:
......@@ -8,7 +20,9 @@ Bug fixes:
(reported by ragingchikn, issue 242).
- Fixed problem with ticks and the border (based on patch from
ultimatehustler69, issue 236).
- Fixed problem with plugins adding options to the series objects.
- Fixed a problem introduced in 0.6 with specifying a gradient with {
brightness: x, opacity: y }.
Flot 0.6
--------
......
examples/index.html
View file @ c3a34cd6
......@@ -29,13 +29,14 @@
<li><a href="navigate.html">Panning and zooming</a> (with navigation plugin)</li>
</ul>
<p>Some more esoteric features:</p>
<p>Various features:</p>
<ul>
<li><a href="time.html">Plotting time series</a> and <a href="visitors.html">visitors per day with zooming and weekends</a> (with selection plugin)</li>
<li><a href="dual-axis.html">Dual axis support</a></li>
<li><a href="thresholding.html">Thresholding the data</a> (with threshold plugin)</li>
<li><a href="stacking.html">Stacked charts</a> (with stacking plugin)</li>
<li><a href="percentiles.html">Using filled areas to plot percentiles</a> (with fillbetween plugin)</li>
<li><a href="tracking.html">Tracking curves with crosshair</a> (with crosshair plugin)</li>
<li><a href="image.html">Plotting prerendered images</a> (with image plugin)</li>
<li><a href="pie.html">Pie charts</a> (with pie plugin)</li>
......
examples/percentiles.html 0 → 100644
View file @ c3a34cd6
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Flot Examples</title>
<link href="layout.css" rel="stylesheet" type="text/css"></link>
<!--[if IE]><script language="javascript" type="text/javascript" src="../excanvas.min.js"></script><![endif]-->
<script language="javascript" type="text/javascript" src="../jquery.js"></script>
<script language="javascript" type="text/javascript" src="../jquery.flot.js"></script>
<script language="javascript" type="text/javascript" src="../jquery.flot.fillbetween.js"></script>
</head>
<body>
<h1>Flot Examples</h1>
<div id="placeholder" style="width:600px;height:400px;"></div>
<p>Height in centimeters of individuals from the US (2003-2006) as function of
age in years (source: <a href="http://www.cdc.gov/nchs/data/nhsr/nhsr010.pdf">CDC</a>).
The 15%-85%, 25%-75% and 50% percentiles are indicated.</p>
<p>For each point of a filled curve, you can specify an arbitrary
bottom. As this example illustrates, this can be useful for
plotting percentiles. If you have the data sets available without
appropriate fill bottoms, you can use the fillbetween plugin to
compute the data point bottoms automatically.</p>
<script id="source" language="javascript" type="text/javascript">
$(function () {
var males = {'15%': [[2, 88.0], [3, 93.3], [4, 102.0], [5, 108.5], [6, 115.7], [7, 115.6], [8, 124.6], [9, 130.3], [10, 134.3], [11, 141.4], [12, 146.5], [13, 151.7], [14, 159.9], [15, 165.4], [16, 167.8], [17, 168.7], [18, 169.5], [19, 168.0]], '90%': [[2, 96.8], [3, 105.2], [4, 113.9], [5, 120.8], [6, 127.0], [7, 133.1], [8, 139.1], [9, 143.9], [10, 151.3], [11, 161.1], [12, 164.8], [13, 173.5], [14, 179.0], [15, 182.0], [16, 186.9], [17, 185.2], [18, 186.3], [19, 186.6]], '25%': [[2, 89.2], [3, 94.9], [4, 104.4], [5, 111.4], [6, 117.5], [7, 120.2], [8, 127.1], [9, 132.9], [10, 136.8], [11, 144.4], [12, 149.5], [13, 154.1], [14, 163.1], [15, 169.2], [16, 170.4], [17, 171.2], [18, 172.4], [19, 170.8]], '10%': [[2, 86.9], [3, 92.6], [4, 99.9], [5, 107.0], [6, 114.0], [7, 113.5], [8, 123.6], [9, 129.2], [10, 133.0], [11, 140.6], [12, 145.2], [13, 149.7], [14, 158.4], [15, 163.5], [16, 166.9], [17, 167.5], [18, 167.1], [19, 165.3]], 'mean': [[2, 91.9], [3, 98.5], [4, 107.1], [5, 114.4], [6, 120.6], [7, 124.7], [8, 131.1], [9, 136.8], [10, 142.3], [11, 150.0], [12, 154.7], [13, 161.9], [14, 168.7], [15, 173.6], [16, 175.9], [17, 176.6], [18, 176.8], [19, 176.7]], '75%': [[2, 94.5], [3, 102.1], [4, 110.8], [5, 117.9], [6, 124.0], [7, 129.3], [8, 134.6], [9, 141.4], [10, 147.0], [11, 156.1], [12, 160.3], [13, 168.3], [14, 174.7], [15, 178.0], [16, 180.2], [17, 181.7], [18, 181.3], [19, 182.5]], '85%': [[2, 96.2], [3, 103.8], [4, 111.8], [5, 119.6], [6, 125.6], [7, 131.5], [8, 138.0], [9, 143.3], [10, 149.3], [11, 159.8], [12, 162.5], [13, 171.3], [14, 177.5], [15, 180.2], [16, 183.8], [17, 183.4], [18, 183.5], [19, 185.5]], '50%': [[2, 91.9], [3, 98.2], [4, 106.8], [5, 114.6], [6, 120.8], [7, 125.2], [8, 130.3], [9, 137.1], [10, 141.5], [11, 149.4], [12, 153.9], [13, 162.2], [14, 169.0], [15, 174.8], [16, 176.0], [17, 176.8], [18, 176.4], [19, 177.4]]};
var females = {'15%': [[2, 84.8], [3, 93.7], [4, 100.6], [5, 105.8], [6, 113.3], [7, 119.3], [8, 124.3], [9, 131.4], [10, 136.9], [11, 143.8], [12, 149.4], [13, 151.2], [14, 152.3], [15, 155.9], [16, 154.7], [17, 157.0], [18, 156.1], [19, 155.4]], '90%': [[2, 95.6], [3, 104.1], [4, 111.9], [5, 119.6], [6, 127.6], [7, 133.1], [8, 138.7], [9, 147.1], [10, 152.8], [11, 161.3], [12, 166.6], [13, 167.9], [14, 169.3], [15, 170.1], [16, 172.4], [17, 169.2], [18, 171.1], [19, 172.4]], '25%': [[2, 87.2], [3, 95.9], [4, 101.9], [5, 107.4], [6, 114.8], [7, 121.4], [8, 126.8], [9, 133.4], [10, 138.6], [11, 146.2], [12, 152.0], [13, 153.8], [14, 155.7], [15, 158.4], [16, 157.0], [17, 158.5], [18, 158.4], [19, 158.1]], '10%': [[2, 84.0], [3, 91.9], [4, 99.2], [5, 105.2], [6, 112.7], [7, 118.0], [8, 123.3], [9, 130.2], [10, 135.0], [11, 141.1], [12, 148.3], [13, 150.0], [14, 150.7], [15, 154.3], [16, 153.6], [17, 155.6], [18, 154.7], [19, 153.1]], 'mean': [[2, 90.2], [3, 98.3], [4, 105.2], [5, 112.2], [6, 119.0], [7, 125.8], [8, 131.3], [9, 138.6], [10, 144.2], [11, 151.3], [12, 156.7], [13, 158.6], [14, 160.5], [15, 162.1], [16, 162.9], [17, 162.2], [18, 163.0], [19, 163.1]], '75%': [[2, 93.2], [3, 101.5], [4, 107.9], [5, 116.6], [6, 122.8], [7, 129.3], [8, 135.2], [9, 143.7], [10, 148.7], [11, 156.9], [12, 160.8], [13, 163.0], [14, 165.0], [15, 165.8], [16, 168.7], [17, 166.2], [18, 167.6], [19, 168.0]], '85%': [[2, 94.5], [3, 102.8], [4, 110.4], [5, 119.0], [6, 125.7], [7, 131.5], [8, 137.9], [9, 146.0], [10, 151.3], [11, 159.9], [12, 164.0], [13, 166.5], [14, 167.5], [15, 168.5], [16, 171.5], [17, 168.0], [18, 169.8], [19, 170.3]], '50%': [[2, 90.2], [3, 98.1], [4, 105.2], [5, 111.7], [6, 118.2], [7, 125.6], [8, 130.5], [9, 138.3], [10, 143.7], [11, 151.4], [12, 156.7], [13, 157.7], [14, 161.0], [15, 162.0], [16, 162.8], [17, 162.2], [18, 162.8], [19, 163.3]]};
var dataset = [
{ label: 'Female mean', data: females['mean'], lines: { show: true }, color: "rgb(255,50,50)" },
{ id: 'f15%', data: females['15%'], lines: { show: true, lineWidth: 0, fill: false }, color: "rgb(255,50,50)" },
{ id: 'f25%', data: females['25%'], lines: { show: true, lineWidth: 0, fill: 0.2 }, color: "rgb(255,50,50)", fillBetween: 'f15%' },
{ id: 'f50%', data: females['50%'], lines: { show: true, lineWidth: 0.5, fill: 0.4, shadowSize: 0 }, color: "rgb(255,50,50)", fillBetween: 'f25%' },
{ id: 'f75%', data: females['75%'], lines: { show: true, lineWidth: 0, fill: 0.4 }, color: "rgb(255,50,50)", fillBetween: 'f50%' },
{ id: 'f85%', data: females['85%'], lines: { show: true, lineWidth: 0, fill: 0.2 }, color: "rgb(255,50,50)", fillBetween: 'f75%' },
{ label: 'Male mean', data: males['mean'], lines: { show: true }, color: "rgb(50,50,255)" },
{ id: 'm15%', data: males['15%'], lines: { show: true, lineWidth: 0, fill: false }, color: "rgb(50,50,255)" },
{ id: 'm25%', data: males['25%'], lines: { show: true, lineWidth: 0, fill: 0.2 }, color: "rgb(50,50,255)", fillBetween: 'm15%' },
{ id: 'm50%', data: males['50%'], lines: { show: true, lineWidth: 0.5, fill: 0.4, shadowSize: 0 }, color: "rgb(50,50,255)", fillBetween: 'm25%' },
{ id: 'm75%', data: males['75%'], lines: { show: true, lineWidth: 0, fill: 0.4 }, color: "rgb(50,50,255)", fillBetween: 'm50%' },
{ id: 'm85%', data: males['85%'], lines: { show: true, lineWidth: 0, fill: 0.2 }, color: "rgb(50,50,255)", fillBetween: 'm75%' }
]
$.plot($("#placeholder"), dataset, {
xaxis: { tickDecimals: 0 },
yaxis: { tickFormatter: function (v) { return v + " cm"; } },
legend: { position: 'se' }
});
});
</script>
</body>
</html>
examples/stacking.html
View file @ c3a34cd6
......@@ -50,7 +50,7 @@ $(function () {
$.plot($("#placeholder"), [ d1, d2, d3 ], {
series: {
stack: stack,
lines: { show: lines, steps: steps },
lines: { show: lines, fill: true, steps: steps },
bars: { show: bars, barWidth: 0.6 }
}
});
......
jquery.flot.fillbetween.js 0 → 100644
View file @ c3a34cd6
/*
Flot plugin for computing bottoms for filled line and bar charts.
The case: you've got two series that you want to fill the area
between. In Flot terms, you need to use one as the fill bottom of the
other. You can specify the bottom of each data point as the third
coordinate manually, or you can use this plugin to compute it for you.
In order to name the other series, you need to give it an id, like this
var dataset = [
{ data: [ ... ], id: "foo" } , // use default bottom
{ data: [ ... ], fillBetween: "foo" }, // use first dataset as bottom
];
$.plot($("#placeholder"), dataset, { line: { show: true, fill: true }});
As a convenience, if the id given is a number that doesn't appear as
an id in the series, it is interpreted as the index in the array
instead (so fillBetween: 0 can also mean the first series).
Internally, the plugin modifies the datapoints in each series. For
line series, extra data points might be inserted through
interpolation. Note that at points where the bottom line is not
defined (due to a null point or start/end of line), the current line
will show a gap too. The algorithm comes from the jquery.flot.stack.js
plugin, possibly some code could be shared.
*/
(function ($) {
var options = {
series: { fillBetween: null } // or number
};
function init(plot) {
function findBottomSeries(s, allseries) {
var i;
for (i = 0; i < allseries.length; ++i) {
if (allseries[i].id == s.fillBetween)
return allseries[i];
}
if (typeof s.fillBetween == "number") {
i = s.fillBetween;
if (i < 0 || i >= allseries.length)
return null;
return allseries[i];
}
return null;
}
function computeFillBottoms(plot, s, datapoints) {
if (s.fillBetween == null)
return;
var other = findBottomSeries(s, plot.getData());
if (!other)
return;
var ps = datapoints.pointsize,
points = datapoints.points,
otherps = other.datapoints.pointsize,
otherpoints = other.datapoints.points,
newpoints = [],
px, py, intery, qx, qy, bottom,
withlines = s.lines.show,
withbottom = ps > 2 && datapoints.format[2].y,
withsteps = withlines && s.lines.steps,
fromgap = true,
i = 0, j = 0, l;
while (true) {
if (i >= points.length)
break;
l = newpoints.length;
if (points[i] == null) {
// copy gaps
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
i += ps;
}
else if (j >= otherpoints.length) {
// for lines, we can't use the rest of the points
if (!withlines) {
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
}
i += ps;
}
else if (otherpoints[j] == null) {
// oops, got a gap
for (m = 0; m < ps; ++m)
newpoints.push(null);
fromgap = true;
j += otherps;
}
else {
// cases where we actually got two points
px = points[i];
py = points[i + 1];
qx = otherpoints[j];
qy = otherpoints[j + 1];
bottom = 0;
if (px == qx) {
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
//newpoints[l + 1] += qy;
bottom = qy;
i += ps;
j += otherps;
}
else if (px > qx) {
// we got past point below, might need to
// insert interpolated extra point
if (withlines && i > 0 && points[i - ps] != null) {
intery = py + (points[i - ps + 1] - py) * (qx - px) / (points[i - ps] - px);
newpoints.push(qx);
newpoints.push(intery)
for (m = 2; m < ps; ++m)
newpoints.push(points[i + m]);
bottom = qy;
}
j += otherps;
}
else { // px < qx
if (fromgap && withlines) {
// if we come from a gap, we just skip this point
i += ps;
continue;
}
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
// we might be able to interpolate a point below,
// this can give us a better y
if (withlines && j > 0 && otherpoints[j - otherps] != null)
bottom = qy + (otherpoints[j - otherps + 1] - qy) * (px - qx) / (otherpoints[j - otherps] - qx);
//newpoints[l + 1] += bottom;
i += ps;
}
fromgap = false;
if (l != newpoints.length && withbottom)
newpoints[l + 2] = bottom;
}
// maintain the line steps invariant
if (withsteps && l != newpoints.length && l > 0
&& newpoints[l] != null
&& newpoints[l] != newpoints[l - ps]
&& newpoints[l + 1] != newpoints[l - ps + 1]) {
for (m = 0; m < ps; ++m)
newpoints[l + ps + m] = newpoints[l + m];
newpoints[l + 1] = newpoints[l - ps + 1];
}
}
datapoints.points = newpoints;
}
plot.hooks.processDatapoints.push(computeFillBottoms);
}
$.plot.plugins.push({
init: init,
options: options,
name: 'fillbetween',
version: '1.0'
});
})(jQuery);
jquery.flot.js
View file @ c3a34cd6
......@@ -330,7 +330,7 @@
if (s.lines.show == null) {
var v, show = true;
for (v in s)
if (s[v].show) {
if (s[v] && s[v].show) {
show = false;
break;
}
......@@ -382,7 +382,7 @@
format.push({ x: true, number: true, required: true });
format.push({ y: true, number: true, required: true });
if (s.bars.show)
if (s.bars.show || (s.lines.show && s.lines.fill))
format.push({ y: true, number: true, required: false, defaultValue: 0 });
s.datapoints.format = format;
......@@ -1364,19 +1364,41 @@
var points = datapoints.points,
ps = datapoints.pointsize,
bottom = Math.min(Math.max(0, axisy.min), axisy.max),
top, lastX = 0, areaOpen = false;
i = 0, top, areaOpen = false,
ypos = 1, segmentStart = 0, segmentEnd = 0;
// we process each segment in two turns, first forward
// direction to sketch out top, then once we hit the
// end we go backwards to sketch the bottom
while (true) {
if (ps > 0 && i > points.length + ps)
break;
for (var i = ps; i < points.length; i += ps) {
var x1 = points[i - ps], y1 = points[i - ps + 1],
x2 = points[i], y2 = points[i + 1];
i += ps; // ps is negative if going backwards
var x1 = points[i - ps],
y1 = points[i - ps + ypos],
x2 = points[i], y2 = points[i + ypos];
if (areaOpen) {
if (ps > 0 && x1 != null && x2 == null) {
// at turning point
segmentEnd = i;
ps = -ps;
ypos = 2;
continue;
}
if (areaOpen && x1 != null && x2 == null) {
// close area
ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));
if (ps < 0 && i == segmentStart + ps) {
// done with the reverse sweep
ctx.fill();
areaOpen = false;
ps = -ps;
ypos = 1;
i = segmentStart = segmentEnd + ps;
continue;
}
}
if (x1 == null || x2 == null)
continue;
......@@ -1422,22 +1444,22 @@
if (y1 >= axisy.max && y2 >= axisy.max) {
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.max));
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.max));
lastX = x2;
continue;
}
else if (y1 <= axisy.min && y2 <= axisy.min) {
ctx.lineTo(axisx.p2c(x1), axisy.p2c(axisy.min));
ctx.lineTo(axisx.p2c(x2), axisy.p2c(axisy.min));
lastX = x2;
continue;
}
// else it's a bit more complicated, there might
// be two rectangles and two triangles we need to fill
// in; to find these keep track of the current x values
// be a flat maxed out rectangle first, then a
// triangular cutout or reverse; to find these
// keep track of the current x values
var x1old = x1, x2old = x2;
// and clip the y values, without shortcutting
// clip the y values, without shortcutting, we
// go through all cases in turn
// clip with ymin
if (y1 <= y2 && y1 < axisy.min && y2 >= axisy.min) {
......@@ -1459,40 +1481,24 @@
y2 = axisy.max;
}
// if the x value was changed we got a rectangle
// to fill
if (x1 != x1old) {
if (y1 <= axisy.min)
top = axisy.min;
else
top = axisy.max;
ctx.lineTo(axisx.p2c(x1old), axisy.p2c(top));
ctx.lineTo(axisx.p2c(x1), axisy.p2c(top));
ctx.lineTo(axisx.p2c(x1old), axisy.p2c(y1));
// it goes to (x1, y1), but we fill that below
}
// fill the triangles
// fill triangular section, this sometimes result
// in redundant points if (x1, y1) hasn't changed
// from previous line to, but we just ignore that
ctx.lineTo(axisx.p2c(x1), axisy.p2c(y1));
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
// fill the other rectangle if it's there
if (x2 != x2old) {
if (y2 <= axisy.min)
top = axisy.min;
else
top = axisy.max;
ctx.lineTo(axisx.p2c(x2), axisy.p2c(top));
ctx.lineTo(axisx.p2c(x2old), axisy.p2c(top));
}
lastX = Math.max(x2, x2old);
ctx.lineTo(axisx.p2c(x2), axisy.p2c(y2));
ctx.lineTo(axisx.p2c(x2old), axisy.p2c(y2));
}
if (areaOpen) {
ctx.lineTo(axisx.p2c(lastX), axisy.p2c(bottom));
ctx.fill();
}
}
......@@ -2039,9 +2045,12 @@
for (var i = 0, l = spec.colors.length; i < l; ++i) {
var c = spec.colors[i];
if (typeof c != "string") {
c = $.color.parse(defaultColor).scale('rgb', c.brightness);
c.a *= c.opacity;
c = c.toString();
var co = $.color.parse(defaultColor);
if (c.brightness != null)
co = co.scale('rgb', c.brightness)
if (c.opacity != null)
co.a *= c.opacity;
c = co.toString();
}
gradient.addColorStop(i / (l - 1), c);
}
......
jquery.flot.stack.js
View file @ c3a34cd6
/*
Flot plugin for stacking data sets, i.e. putting them on top of each
other, for accumulative graphs. Note that the plugin assumes the data
is sorted on x. Also note that stacking a mix of positive and negative
other, for accumulative graphs.
The plugin assumes the data is sorted on x. For line charts, it is
assumed that if a line has an undefined gap (from a null point), then
the line above it should have the same gap - insert zeros instead of
"null" if you want another behaviour. This also holds for the start
and end of the chart. Note that stacking a mix of positive and negative
values in most instances doesn't make sense (so it looks weird).
Two or more series are stacked when their "stack" attribute is set to
......@@ -14,15 +19,15 @@ specify the default stack, you can set
or specify it for a specific series
$.plot($("#placeholder"), [{ data: [ ... ], stack: true ])
$.plot($("#placeholder"), [{ data: [ ... ], stack: true }])
The stacking order is determined by the order of the data series in
the array (later series end up on top of the previous).
Internally, the plugin modifies the datapoints in each series, adding
an offset to the y value. For line series, extra data points are
inserted through interpolation. For bar charts, the second y value is
also adjusted.
inserted through interpolation. If there's a second y value, it's also
adjusted (e.g for bar charts or filled areas).
*/
(function ($) {
......@@ -58,8 +63,10 @@ also adjusted.
otherpoints = other.datapoints.points,
newpoints = [],
px, py, intery, qx, qy, bottom,
withlines = s.lines.show, withbars = s.bars.show,
withlines = s.lines.show,
withbottom = ps > 2 && datapoints.format[2].y,
withsteps = withlines && s.lines.steps,
fromgap = true,
i = 0, j = 0, l;
while (true) {
......@@ -68,14 +75,27 @@ also adjusted.
l = newpoints.length;
if (j >= otherpoints.length
|| otherpoints[j] == null
|| points[i] == null) {
// degenerate cases
if (points[i] == null) {
// copy gaps
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
i += ps;
}
else if (j >= otherpoints.length) {
// for lines, we can't use the rest of the points
if (!withlines) {
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
}
i += ps;
}
else if (otherpoints[j] == null) {
// oops, got a gap
for (m = 0; m < ps; ++m)
newpoints.push(null);
fromgap = true;
j += otherps;
}
else {
// cases where we actually got two points
px = points[i];
......@@ -108,21 +128,29 @@ also adjusted.
j += otherps;
}
else {
else { // px < qx
if (fromgap && withlines) {
// if we come from a gap, we just skip this point
i += ps;
continue;
}
for (m = 0; m < ps; ++m)
newpoints.push(points[i + m]);
// we might be able to interpolate a point below,
// this can give us a better y
if (withlines && j > 0 && otherpoints[j - ps] != null)
bottom = qy + (otherpoints[j - ps + 1] - qy) * (px - qx) / (otherpoints[j - ps] - qx);
if (withlines && j > 0 && otherpoints[j - otherps] != null)
bottom = qy + (otherpoints[j - otherps + 1] - qy) * (px - qx) / (otherpoints[j - otherps] - qx);
newpoints[l + 1] += bottom;
i += ps;
}
if (l != newpoints.length && withbars)
fromgap = false;
if (l != newpoints.length && withbottom)
newpoints[l + 2] += bottom;
}
......@@ -147,6 +175,6 @@ also adjusted.
init: init,
options: options,
name: 'stack',
version: '1.0'
version: '1.1'
});
})(jQuery);
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