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CurvedLines
Commit 84d7785c authored by MichaelZinsmaier's avatar MichaelZinsmaier
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small fix to stay compatible with flot 0.8

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curvedLines.js
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/* The MIT License /* The MIT License
Copyright (c) 2011 by Michael Zinsmaier and nergal.dev Copyright (c) 2011 by Michael Zinsmaier and nergal.dev
Copyright (c) 2012 by Thomas Ritou Copyright (c) 2012 by Thomas Ritou
Permission is hereby granted, free of charge, to any person obtaining a copy Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions: furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software. all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE. THE SOFTWARE.
*/ */
/* /*
____________________________________________________ ____________________________________________________
what it is: what it is:
____________________________________________________ ____________________________________________________
curvedLines is a plugin for flot, that tries to display lines in a smoother way. 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 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 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 points. Both modes are achieved through adding of more data points
=> 1) with large data sets you may get trouble => 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 => 2) if you want to display the points too, you have to plot them as 2nd data series over the lines
This is version 0.5 of curvedLines so it will probably not work in every case. However 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 (: the basic form of use descirbed next works (:
Feel free to further improve the code Feel free to further improve the code
____________________________________________________ ____________________________________________________
how to use it: how to use it:
____________________________________________________ ____________________________________________________
var d1 = [[5,5],[7,3],[9,12]]; var d1 = [[5,5],[7,3],[9,12]];
var options = { series: { curvedLines: { active: true }}}; var options = { series: { curvedLines: { active: true }}};
$.plot($("#placeholder"), [{data = d1, lines: { show: true}, curvedLines: {apply: true}}], options); $.plot($("#placeholder"), [{data = d1, lines: { show: true}, curvedLines: {apply: true}}], options);
_____________________________________________________ _____________________________________________________
options: options:
_____________________________________________________ _____________________________________________________
active: bool true => plugin can be used active: bool true => plugin can be used
apply: bool true => series will be drawn as curved line 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 fit: bool true => forces the max,mins of the curve to be on the datapoints
curvePointFactor number defines how many "virtual" points are used per "real" data point to curvePointFactor int defines how many "virtual" points are used per "real" data point to
emulate the curvedLines emulate the curvedLines
fitPointDist: number guessed by default can be set manually. fitPointDist: int defines the x axis distance of the additional two points that are used
defines the x axis distance of the additional two points that are used to enforce the min max condition. (you will get curvePointFactor * 3 * |datapoints|
to enforce the min max condition. (you will get curvePointFactor * 3 * |datapoints| "virtual" points if fit is true)
"virtual" points if fit is true)
+ line options (since v0.5 curved lines use flots line implementation for drawing
+ line options (since v0.5 curved lines use flots line implementation for drawing => line options like fill, show ... are supported out of the box)
=> line options like fill, show ... are supported out of the box)
*/
*/
/*
/* * v0.1 initial commit
* v0.1 initial commit * v0.15 negative values should work now (outcommented a negative -> 0 hook hope it does no harm)
* 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)
* v0.2 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
* v0.3 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
* v0.4 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).
* 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,
* 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
* shadow) are now supported out of the box */
*/
(function($) {
(function($) {
var options = {
var options = { series : {
series : { curvedLines : {
curvedLines : { active : false,
active : false, apply: false,
apply: false, fit : false,
fit : false, curvePointFactor : 20,
curvePointFactor : 20, fitPointDist : undefined
fitPointDist : undefined }
} }
} };
};
function init(plot) {
function init(plot) {
plot.hooks.processOptions.push(processOptions);
plot.hooks.processOptions.push(processOptions);
//if the plugin is active register processDatapoints method
//if the plugin is active register processDatapoints method function processOptions(plot, options) {
function processOptions(plot, options) {
if (options.series.curvedLines.active) {
if (options.series.curvedLines.active) { plot.hooks.processDatapoints.unshift(processDatapoints);
plot.hooks.processDatapoints.unshift(processDatapoints); }
} }
}
//only if the plugin is active
//only if the plugin is active function processDatapoints(plot, series, datapoints) {
function processDatapoints(plot, series, datapoints) { if (series.curvedLines.apply == true && series.originSeries === undefined) {
if (series.curvedLines.apply == true && series.originSeries === undefined) { if (series.lines.fill) {
if (series.lines.fill) {
var pointsTop = calculateCurvePoints(datapoints, series.curvedLines, 1)
var pointsTop = calculateCurvePoints(datapoints, series.curvedLines, 1) ,pointsBottom = calculateCurvePoints(datapoints, series.curvedLines, 2); //flot makes sur for us that we've got a second y point if fill is true !
,pointsBottom = calculateCurvePoints(datapoints, series.curvedLines, 2); //flot makes sur for us that we've got a second y point if fill is true !
//Merge top and bottom curve
//Merge top and bottom curve datapoints.pointsize = 3;
datapoints.pointsize = 3; datapoints.points = [];
datapoints.points = []; var j = 0;
var j = 0; var k = 0;
var k = 0; var i = 0;
var i = 0; var ps = 2;
var ps = 2; while (i < pointsTop.length || j < pointsBottom.length) {
while (i < pointsTop.length || j < pointsBottom.length) { if (pointsTop[i] == pointsBottom[j]) {
if (pointsTop[i] == pointsBottom[j]) { datapoints.points[k] = pointsTop[i];
datapoints.points[k] = pointsTop[i]; datapoints.points[k + 1] = pointsTop[i + 1];
datapoints.points[k + 1] = pointsTop[i + 1]; datapoints.points[k + 2] = pointsBottom[j + 1];
datapoints.points[k + 2] = pointsBottom[j + 1]; j += ps;
j += ps; i += ps;
i += ps;
} else if (pointsTop[i] < pointsBottom[j]) {
} else if (pointsTop[i] < pointsBottom[j]) { datapoints.points[k] = pointsTop[i];
datapoints.points[k] = pointsTop[i]; datapoints.points[k + 1] = pointsTop[i + 1];
datapoints.points[k + 1] = pointsTop[i + 1]; datapoints.points[k + 2] = k > 0 ? datapoints.points[k-1] : null;
datapoints.points[k + 2] = k > 0 ? datapoints.points[k-1] : null; i += ps;
i += ps; } else {
} else { datapoints.points[k] = pointsBottom[j];
datapoints.points[k] = pointsBottom[j]; datapoints.points[k + 1] = k > 1 ? datapoints.points[k-2] : null;
datapoints.points[k + 1] = k > 1 ? datapoints.points[k-2] : null; datapoints.points[k + 2] = pointsBottom[j + 1];
datapoints.points[k + 2] = pointsBottom[j + 1]; j += ps;
j += ps; }
} k += 3;
k += 3; }
}
if (series.lines.lineWidth > 0) {//Let's draw line in separate series
if (series.lines.lineWidth > 0) {//Let's draw line in separate series var newSerie = $.extend({}, series);
var newSerie = $.extend({}, series); newSerie.lines = $.extend({}, series.lines);
newSerie.lines = $.extend({}, series.lines); newSerie.lines.fill = undefined;
newSerie.lines.fill = undefined; newSerie.label = undefined;
newSerie.label = undefined; newSerie.datapoints = $.extend({}, series.datapoints);
newSerie.datapoints = {}; //Redefine datapoints to top only (else it can have null values which will open the cruve !)
//Redefine datapoints to top only (else it can have null values which will open the cruve !) newSerie.datapoints.points = pointsTop;
newSerie.datapoints.points = pointsTop; newSerie.datapoints.pointsize = 2;
newSerie.datapoints.pointsize = 2; newSerie.curvedLines.apply = false;
newSerie.curvedLines.apply = false; //Don't redo curve point calculation as datapoint is copied to this new serie
//Don't redo curve point calculation as datapoint is copied to this new serie //We find our series to add the line just after the fill (so other series you wanted above this one will still be)
//We find our series to add the line just after the fill (so other series you wanted above this one will still be) var allSeries = plot.getData();
var allSeries = plot.getData(); for ( i = 0; i < allSeries.length; i++) {
for ( i = 0; i < allSeries.length; i++) { if (allSeries[i] == series) {
if (allSeries[i] == series) { plot.getData().splice(i + 1, 0, newSerie);
plot.getData().splice(i + 1, 0, newSerie); break;
break; }
} }
}
series.lines.lineWidth = 0;
series.lines.lineWidth = 0; }
}
} else if (series.lines.lineWidth > 0) {
} else if (series.lines.lineWidth > 0) { datapoints.points = calculateCurvePoints(datapoints, series.curvedLines, 1);
datapoints.points = calculateCurvePoints(datapoints, series.curvedLines, 1); datapoints.pointsize = 2;
datapoints.pointsize = 2; }
} }
} }
}
//no real idea whats going on here code mainly from https://code.google.com/p/flot/issues/detail?id=226
//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.
//if fit option is selected additional datapoints get inserted before the curve calculations in nergal.dev s code. function calculateCurvePoints(datapoints, curvedLinesOptions, yPos) {
function calculateCurvePoints(datapoints, curvedLinesOptions, yPos) {
var points = datapoints.points, ps = datapoints.pointsize;
var points = datapoints.points, ps = datapoints.pointsize; var num = curvedLinesOptions.curvePointFactor * (points.length / ps);
var num = curvedLinesOptions.curvePointFactor * (points.length / ps);
var xdata = new Array;
var xdata = new Array; var ydata = new Array;
var ydata = new Array;
var X = 0;
var X = 0; var Y = yPos;
var Y = yPos;
var curX = -1;
var curX = -1; var curY = -1;
var curY = -1; var j = 0;
var j = 0;
if (curvedLinesOptions.fit) {
if (curvedLinesOptions.fit) { //insert a point before and after the "real" data point to force the line
//insert a point before and after the "real" data point to force the line //to have a max,min at the data point however only if it is a lowest or highest point of the
//to have a max,min at the data point however only if it is a lowest or highest point of the //curve => avoid saddles
//curve => avoid saddles
var fpDist;
var fpDist; if(typeof curvedLinesOptions.fitPointDist == 'undefined') {
if(typeof curvedLinesOptions.fitPointDist == 'undefined') { //estimate it
//estimate it var minX = points[0];
var minX = points[0]; var maxX = points[points.length-ps];
var maxX = points[points.length-ps]; fpDist = (maxX - minX) / (500 * 100); //x range / (estimated pixel length of placeholder * factor)
fpDist = (maxX - minX) / (500 * 100); //x range / (estimated pixel length of placeholder * factor) } else {
} else { //use user defined value
//use user defined value fpDist = curvedLinesOptions.fitPointDist;
fpDist = curvedLinesOptions.fitPointDist; }
}
for (var i = 0; i < points.length; i += ps) {
for (var i = 0; i < points.length; i += ps) {
var front = new Array;
var front = new Array; var back = new Array;
var back = new Array; curX = i;
curX = i; curY = i + yPos;
curY = i + yPos;
//add point X s
//add point X s front[X] = points[curX] - fpDist;
front[X] = points[curX] - fpDist; back[X] = points[curX] + fpDist;
back[X] = points[curX] + fpDist;
var factor = 2;
var factor = 2; while (front[X] == points[curX] || back[X] == points[curX]) {
while (front[X] == points[curX] || back[X] == points[curX]) { //inside the ulp
//inside the ulp front[X] = points[curX] - (fpDist * factor);
front[X] = points[curX] - (fpDist * factor); back[X] = points[curX] + (fpDist * factor);
back[X] = points[curX] + (fpDist * factor); factor++;
factor++; }
}
//add point Y s
//add point Y s back[Y] = points[curY];
back[Y] = points[curY]; front[Y] = points[curY];
front[Y] = points[curY];
//get points (front and back) Y value for saddle test
//get points (front and back) Y value for saddle test var frontPointY = points[curY];
var frontPointY = points[curY]; var backPointY = points[curY];
var backPointY = points[curY]; if (i >= ps) {
if (i >= ps) { frontPointY = points[curY - ps];
frontPointY = points[curY - ps]; }
} if ((i + ps) < points.length) {
if ((i + ps) < points.length) { backPointY = points[curY + ps];
backPointY = points[curY + ps]; }
}
//test for a saddle
//test for a saddle if ((frontPointY <= points[curY] && backPointY <= points[curY]) || //max or partial horizontal
if ((frontPointY <= points[curY] && backPointY <= points[curY]) || //max or partial horizontal (frontPointY >= points[curY] && backPointY >= points[curY])) {//min or partial horizontal
(frontPointY >= points[curY] && backPointY >= points[curY])) {//min or partial horizontal
//add curve points
//add curve points xdata[j] = front[X];
xdata[j] = front[X]; ydata[j] = front[Y];
ydata[j] = front[Y]; j++;
j++;
xdata[j] = points[curX];
xdata[j] = points[curX]; ydata[j] = points[curY];
ydata[j] = points[curY]; j++;
j++;
xdata[j] = back[X];
xdata[j] = back[X]; ydata[j] = back[Y];
ydata[j] = back[Y]; j++;
j++; } else {//saddle
} else {//saddle //use original point only
//use original point only xdata[j] = points[curX];
xdata[j] = points[curX]; ydata[j] = points[curY];
ydata[j] = points[curY]; j++;
j++; }
}
}
} } else {
} else { //just use the datapoints
//just use the datapoints for (var i = 0; i < points.length; i += ps) {
for (var i = 0; i < points.length; i += ps) { curX = i;
curX = i; curY = i + yPos;
curY = i + yPos;
xdata[j] = points[curX];
xdata[j] = points[curX]; ydata[j] = points[curY];
ydata[j] = points[curY]; j++;
j++; }
} }
}
var n = xdata.length;
var n = xdata.length;
var y2 = new Array();
var y2 = new Array(); var delta = new Array();
var delta = new Array(); y2[0] = 0;
y2[0] = 0; y2[n - 1] = 0;
y2[n - 1] = 0; delta[0] = 0;
delta[0] = 0;
for (var i = 1; i < n - 1; ++i) {
for (var i = 1; i < n - 1; ++i) { var d = (xdata[i + 1] - xdata[i - 1]);
var d = (xdata[i + 1] - xdata[i - 1]); if (d == 0) {
if (d == 0) { return null;
return null; }
}
var s = (xdata[i] - xdata[i - 1]) / d;
var s = (xdata[i] - xdata[i - 1]) / d; var p = s * y2[i - 1] + 2;
var p = s * y2[i - 1] + 2; y2[i] = (s - 1) / p;
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] = (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;
delta[i] = (6 * delta[i] / (xdata[i + 1] - xdata[i - 1]) - s * delta[i - 1]) / p; }
}
for (var j = n - 2; j >= 0; --j) {
for (var j = n - 2; j >= 0; --j) { y2[j] = y2[j] * y2[j + 1] + delta[j];
y2[j] = y2[j] * y2[j + 1] + delta[j]; }
}
var step = (xdata[n - 1] - xdata[0]) / (num - 1);
var step = (xdata[n - 1] - xdata[0]) / (num - 1);
var xnew = new Array;
var xnew = new Array; var ynew = new Array;
var ynew = new Array; var result = new Array;
var result = new Array;
xnew[0] = xdata[0];
xnew[0] = xdata[0]; ynew[0] = ydata[0];
ynew[0] = ydata[0];
result.push(xnew[0]);
result.push(xnew[0]); result.push(ynew[0]);
result.push(ynew[0]);
for ( j = 1; j < num; ++j) {
for ( j = 1; j < num; ++j) { xnew[j] = xnew[0] + j * step;
xnew[j] = xnew[0] + j * step;
var max = n - 1;
var max = n - 1; var min = 0;
var min = 0;
while (max - min > 1) {
while (max - min > 1) { var k = Math.round((max + min) / 2);
var k = Math.round((max + min) / 2); if (xdata[k] > xnew[j]) {
if (xdata[k] > xnew[j]) { max = k;
max = k; } else {
} else { min = k;
min = k; }
} }
}
var h = (xdata[max] - xdata[min]);
var h = (xdata[max] - xdata[min]);
if (h == 0) {
if (h == 0) { return null;
return null; }
}
var a = (xdata[max] - xnew[j]) / h;
var a = (xdata[max] - xnew[j]) / h; var b = (xnew[j] - xdata[min]) / 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;
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(xnew[j]); result.push(ynew[j]);
result.push(ynew[j]); }
}
return result;
return result; }
}
}//end init
}//end init
$.plot.plugins.push({
$.plot.plugins.push({ init : init,
init : init, options : options,
options : options, name : 'curvedLines',
name : 'curvedLines', version : '0.5'
version : '0.5' });
});
})(jQuery);
})(jQuery);
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