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CurvedLines
Commit 3db2c2ee authored by Michael Zinsmaier's avatar Michael Zinsmaier
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API break refactored the code to prepare it for a new algorithmic core

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curvedLines.js
View file @ 3db2c2ee
......@@ -22,296 +22,315 @@
THE SOFTWARE.
*/
/*
____________________________________________________
what it is:
____________________________________________________
curvedLines is a plugin for flot, that tries to display lines in a smoother way.
The plugin is based on nergal.dev's work https://code.google.com/p/flot/issues/detail?id=226
and further extended with a mode that forces the min/max points of the curves to be on the
points. Both modes are achieved through adding of more data points
=> 1) with large data sets you may get trouble
=> 2) if you want to display the points too, you have to plot them as 2nd data series over the lines
&& 3) consecutive x data points are not allowed to have the same value
This is version 0.5 of curvedLines so it will probably not work in every case. However
the basic form of use descirbed next works (:
Feel free to further improve the code
____________________________________________________
how to use it:
____________________________________________________
var d1 = [[5,5],[7,3],[9,12]];
var options = { series: { curvedLines: { active: true }}};
$.plot($("#placeholder"), [{data = d1, lines: { show: true}, curvedLines: {apply: true}}], options);
_____________________________________________________
options:
_____________________________________________________
active: bool true => plugin can be used
apply: bool true => series will be drawn as curved line
fit: bool true => forces the max,mins of the curve to be on the datapoints
curvePointFactor int defines how many "virtual" points are used per "real" data point to
emulate the curvedLines (points total = real points * curvePointFactor)
fitPointDist: int defines the x axis distance of the additional two points that are used
to enforce the min max condition.
+ line options (since v0.5 curved lines use flots line implementation for drawing
=> line options like fill, show ... are supported out of the box)
*/
/*
* v0.1 initial commit
* v0.15 negative values should work now (outcommented a negative -> 0 hook hope it does no harm)
* v0.2 added fill option (thanks to monemihir) and multi axis support (thanks to soewono effendi)
* v0.3 improved saddle handling and added basic handling of Dates
* v0.4 rewritten fill option (thomas ritou) mostly from original flot code (now fill between points rather than to graph bottom), corrected fill Opacity bug
* v0.5 rewritten instead of implementing a own draw function CurvedLines is now based on the processDatapoints flot hook (credits go to thomas ritou).
* This change breakes existing code however CurvedLines are now just many tiny straight lines to flot and therefore all flot lines options (like gradient fill,
* shadow) are now supported out of the box
* v0.6 flot 0.8 compatibility and some bug fixes
* v0.6.0 changed versioning schema
*/
(function($) {
var options = {
series : {
curvedLines : {
active : false,
apply: false,
fit : false,
curvePointFactor : 20,
fitPointDist : undefined
}
}
};
/*
function init(plot) {
____________________________________________________
plot.hooks.processOptions.push(processOptions);
what it is:
____________________________________________________
//if the plugin is active register processDatapoints method
function processOptions(plot, options) {
if (options.series.curvedLines.active) {
plot.hooks.processDatapoints.unshift(processDatapoints);
}
curvedLines is a plugin for flot, that tries to display lines in a smoother way.
This is achieved through adding of more data points. The plugin is a data processor and can thus be used
in combination with standard line / point rendering options.
=> 1) with large data sets you may get trouble
=> 2) if you want to display the points too, you have to plot them as 2nd data series over the lines
&& 3) consecutive x data points are not allowed to have the same value
Feel free to further improve the code
____________________________________________________
how to use it:
____________________________________________________
var d1 = [[5,5],[7,3],[9,12]];
var options = { series: { curvedLines: { active: true }}};
$.plot($("#placeholder"), [{data = d1, lines: { show: true}, curvedLines: {apply: true}}], options);
_____________________________________________________
options:
_____________________________________________________
active: bool true => plugin can be used
apply: bool true => series will be drawn as curved line
deprecated options from flot prior to 1.0.0:
------------------------------------------------
legacyOverride bool true => use old default OR
legacyOverride optionArray
{
fit: bool true => forces the max,mins of the curve to be on the datapoints
curvePointFactor int defines how many "virtual" points are used per "real" data point to
emulate the curvedLines (points total = real points * curvePointFactor)
fitPointDist: int defines the x axis distance of the additional two points that are used
} to enforce the min max condition.
*/
/*
* v0.1 initial commit
* v0.15 negative values should work now (outcommented a negative -> 0 hook hope it does no harm)
* v0.2 added fill option (thanks to monemihir) and multi axis support (thanks to soewono effendi)
* v0.3 improved saddle handling and added basic handling of Dates
* v0.4 rewritten fill option (thomas ritou) mostly from original flot code (now fill between points rather than to graph bottom), corrected fill Opacity bug
* v0.5 rewritten instead of implementing a own draw function CurvedLines is now based on the processDatapoints flot hook (credits go to thomas ritou).
* This change breakes existing code however CurvedLines are now just many tiny straight lines to flot and therefore all flot lines options (like gradient fill,
* shadow) are now supported out of the box
* v0.6 flot 0.8 compatibility and some bug fixes
* v0.6.x changed versioning schema
*
* v1.0.0 API Break marked existing implementation/options as deprecated
*/
(function($) {
var options = {
series : {
curvedLines : {
active : false,
apply : false,
monotonicFit : false,
tension : 0.0,
legacyOverride : undefined
}
}
};
function init(plot) {
plot.hooks.processOptions.push(processOptions);
//only if the plugin is active
function processDatapoints(plot, series, datapoints) {
var nrPoints = datapoints.points.length / datapoints.pointsize;
var EPSILON = 0.5; //pretty large epsilon but save
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); //flot makes sure for us that we've got a second y point if fill is true !
//Merge top and bottom curve
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;
//if the plugin is active register processDatapoints method
function processOptions(plot, options) {
if (options.series.curvedLines.active) {
plot.hooks.processDatapoints.unshift(processDatapoints);
}
}
//only if the plugin is active
function processDatapoints(plot, series, datapoints) {
var nrPoints = datapoints.points.length / datapoints.pointsize;
var EPSILON = 0.005;
if (series.curvedLines.apply == true && series.originSeries === undefined && nrPoints > (1 + EPSILON)) {
if (series.lines.fill) {
var pointsTop = calculateCurvePoints(datapoints, series.curvedLines, 1);
var pointsBottom = calculateCurvePoints(datapoints, series.curvedLines, 2);
//flot makes sure for us that we've got a second y point if fill is true !
//Merge top and bottom curve
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;
}
} else if (series.lines.lineWidth > 0) {
datapoints.points = calculateCurvePoints(datapoints, series.curvedLines, 1);
datapoints.pointsize = 2;
k += 3;
}
} else if (series.lines.lineWidth > 0) {
datapoints.points = calculateCurvePoints(datapoints, series.curvedLines, 1);
datapoints.pointsize = 2;
}
}
}
function calculateCurvePoints(datapoints, curvedLinesOptions, yPos) {
if (typeof curvedLinesOptions.legacyOverride != 'undefined' && curvedLinesOptions.legacyOverride != false) {
var defaultOptions = {
fit : false,
curvePointFactor : 20,
fitPointDist : undefined
};
var legacyOptions = jQuery.extend(defaultOptions, curvedLinesOptions.legacyOverride);
return calculateLegacyCurvePoints(datapoints, legacyOptions, yPos);
}
return datapoints.points;
}
//no real idea whats going on here code mainly from https://code.google.com/p/flot/issues/detail?id=226
//if fit option is selected additional datapoints get inserted before the curve calculations in nergal.dev s code.
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) {
//insert a point before and after the "real" data point to force the line
//to have a max,min at the data point.
var fpDist;
if(typeof curvedLinesOptions.fitPointDist == 'undefined') {
//estimate it
var minX = points[0];
var maxX = points[points.length-ps];
fpDist = (maxX - minX) / (500 * 100); //x range / (estimated pixel length of placeholder * factor)
} else {
//use user defined value
fpDist = curvedLinesOptions.fitPointDist;
}
function calculateLegacyCurvePoints(datapoints, curvedLinesOptions, yPos) {
for (var i = 0; i < points.length; i += ps) {
var frontX;
var backX;
curX = i;
curY = i + yPos;
//add point X s
frontX = points[curX] - fpDist;
backX = points[curX] + fpDist;
var factor = 2;
while (frontX == points[curX] || backX == points[curX]) {
//inside the ulp
frontX = points[curX] - (fpDist * factor);
backX = points[curX] + (fpDist * factor);
factor++;
}
//add curve points
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++;
}
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) {
//insert a point before and after the "real" data point to force the line
//to have a max,min at the data point.
var fpDist;
if ( typeof curvedLinesOptions.fitPointDist == 'undefined') {
//estimate it
var minX = points[0];
var maxX = points[points.length - ps];
fpDist = (maxX - minX) / (500 * 100);
//x range / (estimated pixel length of placeholder * factor)
} else {
//just use the datapoints
for (var i = 0; i < points.length; i += ps) {
curX = i;
curY = i + yPos;
xdata[j] = points[curX];
ydata[j] = points[curY];
j++;
}
//use user defined value
fpDist = curvedLinesOptions.fitPointDist;
}
var n = xdata.length;
for (var i = 0; i < points.length; i += ps) {
var y2 = new Array();
var delta = new Array();
y2[0] = 0;
y2[n - 1] = 0;
delta[0] = 0;
var frontX;
var backX;
curX = i;
curY = i + yPos;
for (var i = 1; i < n - 1; ++i) {
var d = (xdata[i + 1] - xdata[i - 1]);
if (d == 0) {
//point before current point and after current point need some space in between
return [];
//add point X s
frontX = points[curX] - fpDist;
backX = points[curX] + fpDist;
var factor = 2;
while (frontX == points[curX] || backX == points[curX]) {
//inside the ulp
frontX = points[curX] - (fpDist * factor);
backX = points[curX] + (fpDist * factor);
factor++;
}
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;
//add curve points
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 {
//just use the datapoints
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;
for (var j = n - 2; j >= 0; --j) {
y2[j] = y2[j] * y2[j + 1] + delta[j];
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) {
//point before current point and after current point need some space in between
return [];
}
// xmax - xmin / #points
var step = (xdata[n - 1] - xdata[0]) / (num - 1);
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;
}
var xnew = new Array;
var ynew = new Array;
var result = new Array;
for (var j = n - 2; j >= 0; --j) {
y2[j] = y2[j] * y2[j + 1] + delta[j];
}
xnew[0] = xdata[0];
ynew[0] = ydata[0];
// xmax - xmin / #points
var step = (xdata[n - 1] - xdata[0]) / (num - 1);
result.push(xnew[0]);
result.push(ynew[0]);
var xnew = new Array;
var ynew = new Array;
var result = new Array;
for ( j = 1; j < num; ++j) {
//new x point (sampling point for the created curve)
xnew[j] = xnew[0] + j * step;
xnew[0] = xdata[0];
ynew[0] = ydata[0];
var max = n - 1;
var min = 0;
result.push(xnew[0]);
result.push(ynew[0]);
while (max - min > 1) {
var k = Math.round((max + min) / 2);
if (xdata[k] > xnew[j]) {
max = k;
} else {
min = k;
}
}
for ( j = 1; j < num; ++j) {
//new x point (sampling point for the created curve)
xnew[j] = xnew[0] + j * step;
//found point one to the left and one to the right of generated new point
var h = (xdata[max] - xdata[min]);
var max = n - 1;
var min = 0;
if (h == 0) {
//similar to above two points from original x data need some space between them
return [];
while (max - min > 1) {
var k = Math.round((max + min) / 2);
if (xdata[k] > xnew[j]) {
max = k;
} else {
min = k;
}
}
var a = (xdata[max] - xnew[j]) / h;
var b = (xnew[j] - xdata[min]) / h;
//found point one to the left and one to the right of generated new point
var h = (xdata[max] - xdata[min]);
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]);
if (h == 0) {
//similar to above two points from original x data need some space between them
return [];
}
return result;
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]);
}
}//end init
return result;
}
}//end init
$.plot.plugins.push({
init : init,
options : options,
name : 'curvedLines',
version : '0.6.4'
});
$.plot.plugins.push({
init : init,
options : options,
name : 'curvedLines',
version : '1.0.0'
});
})(jQuery);
})(jQuery);
tests/Issue18.htm
View file @ 3db2c2ee
......@@ -121,10 +121,12 @@
},
curvedLines: {
apply: true,
legacyOverride: {
/*play with parameters (lines)*/
//fitPointDist: 86400,
//curvePointFactor: 200,
fit: true
//fitPointDist: 86400,
//curvePointFactor: 200,
fit: true
}
},
clickable: false,
hoverable: false,
......@@ -138,10 +140,12 @@
},
curvedLines: {
apply: true,
legacyOverride: {
/*play with parameters (points)*/
//fitPointDist: 86400,
//curvePointFactor: 200,
fit: true
//fitPointDist: 86400,
//curvePointFactor: 200,
fit: true
}
},
color:'#FF0000'
};
......
tests/Issue19.htm
View file @ 3db2c2ee
......@@ -47,7 +47,11 @@ $(function() {
],
{
series: {
curvedLines: { active: true, fit: true}
curvedLines: {
active: true,
apply: true,
legacyOverride : { fit: true }
}
}
}
);
......
tests/testDate.htm
View file @ 3db2c2ee
......@@ -50,6 +50,7 @@
},
curvedLines : {
apply : true,
legacyOverride: true
}
}, {
data : d1,
......@@ -87,6 +88,7 @@
},
curvedLines : {
apply : true,
legacyOverride: true
}
}, {
data : d1,
......
tests/testExample.htm
View file @ 3db2c2ee
......@@ -24,7 +24,7 @@
yaxis: { min:10, max: 90}
};
$.plot($("#flotOrig"), [{data: d1, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true}}, {data: d1, points: { show: true }}], options);
$.plot($("#flotOrig"), [{data: d1, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true, legacyOverride: true}}, {data: d1, points: { show: true }}], options);
});
</script>
</body>
......
tests/testExampleFillMultiAxis.htm
View file @ 3db2c2ee
......@@ -26,8 +26,8 @@
$.plot($("#fillAndMultiAxis"),
[
{data: d1, lines: { show: true, fill: true, fillColor: "rgba(195, 195, 195, 0.4)", lineWidth: 3}, curvedLines: {apply: true}}, {data: d1, points: { show: true }},
{data: d2, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true}, yaxis:2}, {data: d2, points: { show: true }, yaxis:2}
{data: d1, lines: { show: true, fill: true, fillColor: "rgba(195, 195, 195, 0.4)", lineWidth: 3}, curvedLines: {apply: true, legacyOverride: true}}, {data: d1, points: { show: true }},
{data: d2, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true, legacyOverride: true}, yaxis:2}, {data: d2, points: { show: true }, yaxis:2}
], options);
});
</script>
......
tests/testExampleFit.htm
View file @ 3db2c2ee
......@@ -36,9 +36,13 @@
show : true,
lineWidth : 3
},
curvedLines: {apply: true,
fit : true,
curvedLines:
{
apply: true,
legacyOverride: {
fit : true,
}
}
}, {
data : d1,
points : {
......
tests/testSaddlePoint.htm
View file @ 3db2c2ee
......@@ -25,7 +25,7 @@
yaxis: { min:10, max: 45}
};
$.plot($("#flotOrig"), [{data: d1, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true}}, {data: d1, points: { show: true }}], options);
$.plot($("#flotOrig"), [{data: d1, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true, legacyOverride: true}}, {data: d1, points: { show: true }}], options);
});
</script>
</body>
......
tests/testSinglePoint.htm
View file @ 3db2c2ee
......@@ -26,7 +26,8 @@
show : true
},
curvedLines : {
apply : true
apply : true,
legacyOverride: true
}
}, {
data : d1,
......
tests/testThreshold.htm
View file @ 3db2c2ee
......@@ -41,7 +41,8 @@
lineWidth : 3
},
curvedLines : {
apply : true
apply : true,
legacyOverride: true
}
}, {
data : d1,
......
tests/testTooltip.htm
View file @ 3db2c2ee
......@@ -50,7 +50,8 @@ $(function () {
//general options
var options = {
series: {curvedLines : {
active : true
active : true,
legacyOverride: true
},
lines: { lineWidth: 5},
points: { radius: 4 }
......
tests/testZeroDrop.htm
View file @ 3db2c2ee
......@@ -26,7 +26,7 @@
yaxis: { min:0, max: 10}
};
$.plot($("#flotOrig"), [{data: d1, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true}}, {data: d1, points: { show: true }}], options);
$.plot($("#flotOrig"), [{data: d1, lines: { show: true, lineWidth: 3}, curvedLines: {apply: true, legacyOverride: true}}, {data: d1, points: { show: true }}], options);
});
</script>
</body>
......
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