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index.js
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/**
* Copyright 2012-2018, Plotly, Inc.
* All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
var createRegl = require('regl');
var createScatter = require('regl-scatter2d');
var createLine = require('regl-line2d');
var createError = require('regl-error2d');
var kdtree = require('kdgrass');
var rgba = require('color-normalize');
var svgSdf = require('svg-path-sdf');
var arrayRange = require('array-range');
var Registry = require('../../registry');
var Lib = require('../../lib');
var AxisIDs = require('../../plots/cartesian/axis_ids');
var Drawing = require('../../components/drawing');
var formatColor = require('../../lib/gl_format_color');
var subTypes = require('../scatter/subtypes');
var calcMarkerSize = require('../scatter/calc').calcMarkerSize;
var calcAxisExpansion = require('../scatter/calc').calcAxisExpansion;
var calcColorscales = require('../scatter/colorscale_calc');
var makeBubbleSizeFn = require('../scatter/make_bubble_size_func');
var linkTraces = require('../scatter/link_traces');
var getTraceColor = require('../scatter/get_trace_color');
var fillHoverText = require('../scatter/fill_hover_text');
var DASHES = require('../../constants/gl2d_dashes');
var BADNUM = require('../../constants/numerical').BADNUM;
var SYMBOL_SDF_SIZE = 200;
var SYMBOL_SIZE = 20;
var SYMBOL_STROKE = SYMBOL_SIZE / 20;
var SYMBOL_SDF = {};
var SYMBOL_SVG_CIRCLE = Drawing.symbolFuncs[0](SYMBOL_SIZE * 0.05);
var TOO_MANY_POINTS = 1e5;
var DOT_RE = /-dot/;
var OPEN_RE = /-open/;
function calc(gd, trace) {
var fullLayout = gd._fullLayout;
var xa = AxisIDs.getFromId(gd, trace.xaxis);
var ya = AxisIDs.getFromId(gd, trace.yaxis);
var subplot = fullLayout._plots[trace.xaxis + trace.yaxis];
var count = trace._length;
var count2 = count * 2;
var stash = {};
var i, xx, yy;
var x = xa.makeCalcdata(trace, 'x');
var y = ya.makeCalcdata(trace, 'y');
// we need hi-precision for scatter2d,
// regl-scatter2d uses NaNs for bad/missing values
var positions = new Array(count2);
for(i = 0; i < count; i++) {
xx = x[i];
yy = y[i];
positions[i * 2] = xx === BADNUM ? NaN : xx;
positions[i * 2 + 1] = yy === BADNUM ? NaN : yy;
}
if(xa.type === 'log') {
for(i = 0; i < count2; i += 2) {
positions[i] = xa.c2l(positions[i]);
}
}
if(ya.type === 'log') {
for(i = 1; i < count2; i += 2) {
positions[i] = ya.c2l(positions[i]);
}
}
// we don't build a tree for log axes since it takes long to convert log2px
// and it is also
if(xa.type !== 'log' && ya.type !== 'log') {
// FIXME: delegate this to webworker
stash.tree = kdtree(positions, 512);
} else {
var ids = stash.ids = new Array(count);
for(i = 0; i < count; i++) {
ids[i] = i;
}
}
// create scene options and scene
calcColorscales(trace);
var options = sceneOptions(gd, subplot, trace, positions);
var markerOptions = options.marker;
var scene = sceneUpdate(gd, subplot);
var ppad;
// Re-use SVG scatter axis expansion routine except
// for graph with very large number of points where it
// performs poorly.
// In big data case, fake Axes.expand outputs with data bounds,
// and an average size for array marker.size inputs.
if(count < TOO_MANY_POINTS) {
ppad = calcMarkerSize(trace, count);
} else if(markerOptions) {
ppad = 2 * (markerOptions.sizeAvg || Math.max(markerOptions.size, 3));
}
calcAxisExpansion(gd, trace, xa, ya, x, y, ppad);
// set flags to create scene renderers
if(options.fill && !scene.fill2d) scene.fill2d = true;
if(options.marker && !scene.scatter2d) scene.scatter2d = true;
if(options.line && !scene.line2d) scene.line2d = true;
if((options.errorX || options.errorY) && !scene.error2d) scene.error2d = true;
// save scene options batch
scene.lineOptions.push(options.line);
scene.errorXOptions.push(options.errorX);
scene.errorYOptions.push(options.errorY);
scene.fillOptions.push(options.fill);
scene.markerOptions.push(options.marker);
scene.selectedOptions.push(options.selected);
scene.unselectedOptions.push(options.unselected);
scene.count++;
// stash scene ref
stash.scene = scene;
stash.index = scene.count - 1;
stash.x = x;
stash.y = y;
stash.positions = positions;
stash.count = count;
gd.firstscatter = false;
return [{x: false, y: false, t: stash, trace: trace}];
}
// create scene options
function sceneOptions(gd, subplot, trace, positions) {
var fullLayout = gd._fullLayout;
var count = positions.length / 2;
var markerOpts = trace.marker;
var xaxis = AxisIDs.getFromId(gd, trace.xaxis);
var yaxis = AxisIDs.getFromId(gd, trace.yaxis);
var ptrX = 0;
var ptrY = 0;
var i;
var hasLines, hasErrorX, hasErrorY, hasError, hasMarkers, hasFill;
if(trace.visible !== true) {
hasLines = false;
hasErrorX = false;
hasErrorY = false;
hasMarkers = false;
hasFill = false;
} else {
hasLines = subTypes.hasLines(trace) && positions.length > 1;
hasErrorX = trace.error_x && trace.error_x.visible === true;
hasErrorY = trace.error_y && trace.error_y.visible === true;
hasError = hasErrorX || hasErrorY;
hasMarkers = subTypes.hasMarkers(trace);
hasFill = !!trace.fill && trace.fill !== 'none';
}
var lineOptions, markerOptions, fillOptions;
var errorXOptions, errorYOptions;
var selectedOptions, unselectedOptions;
var linePositions;
// get error values
var errorVals = hasError ?
Registry.getComponentMethod('errorbars', 'calcFromTrace')(trace, fullLayout) :
null;
if(hasErrorX) {
errorXOptions = {};
errorXOptions.positions = positions;
var errorsX = new Float64Array(4 * count);
if(xaxis.type === 'log') {
for(i = 0; i < count; ++i) {
errorsX[ptrX++] = positions[i * 2] - xaxis.d2l(errorVals[i].xs) || 0;
errorsX[ptrX++] = xaxis.d2l(errorVals[i].xh) - positions[i * 2] || 0;
errorsX[ptrX++] = 0;
errorsX[ptrX++] = 0;
}
} else {
for(i = 0; i < count; ++i) {
errorsX[ptrX++] = positions[i * 2] - errorVals[i].xs || 0;
errorsX[ptrX++] = errorVals[i].xh - positions[i * 2] || 0;
errorsX[ptrX++] = 0;
errorsX[ptrX++] = 0;
}
}
if(trace.error_x.copy_ystyle) {
trace.error_x = trace.error_y;
}
errorXOptions.errors = errorsX;
errorXOptions.capSize = trace.error_x.width * 2;
errorXOptions.lineWidth = trace.error_x.thickness;
errorXOptions.color = trace.error_x.color;
}
if(hasErrorY) {
errorYOptions = {};
errorYOptions.positions = positions;
var errorsY = new Float64Array(4 * count);
if(yaxis.type === 'log') {
for(i = 0; i < count; ++i) {
errorsY[ptrY++] = 0;
errorsY[ptrY++] = 0;
errorsY[ptrY++] = positions[i * 2 + 1] - yaxis.d2l(errorVals[i].ys) || 0;
errorsY[ptrY++] = yaxis.d2l(errorVals[i].yh) - positions[i * 2 + 1] || 0;
}
} else {
for(i = 0; i < count; ++i) {
errorsY[ptrY++] = 0;
errorsY[ptrY++] = 0;
errorsY[ptrY++] = positions[i * 2 + 1] - errorVals[i].ys || 0;
errorsY[ptrY++] = errorVals[i].yh - positions[i * 2 + 1] || 0;
}
}
errorYOptions.errors = errorsY;
errorYOptions.capSize = trace.error_y.width * 2;
errorYOptions.lineWidth = trace.error_y.thickness;
errorYOptions.color = trace.error_y.color;
}
if(hasLines) {
lineOptions = {};
lineOptions.thickness = trace.line.width;
lineOptions.color = trace.line.color;
lineOptions.opacity = trace.opacity;
lineOptions.overlay = true;
var dashes = (DASHES[trace.line.dash] || [1]).slice();
for(i = 0; i < dashes.length; ++i) dashes[i] *= lineOptions.thickness;
lineOptions.dashes = dashes;
if(trace.line.shape === 'hv') {
linePositions = [];
for(i = 0; i < Math.floor(positions.length / 2) - 1; i++) {
if(isNaN(positions[i * 2]) || isNaN(positions[i * 2 + 1])) {
linePositions.push(NaN);
linePositions.push(NaN);
linePositions.push(NaN);
linePositions.push(NaN);
}
else {
linePositions.push(positions[i * 2]);
linePositions.push(positions[i * 2 + 1]);
linePositions.push(positions[i * 2 + 2]);
linePositions.push(positions[i * 2 + 1]);
}
}
linePositions.push(positions[positions.length - 2]);
linePositions.push(positions[positions.length - 1]);
}
else if(trace.line.shape === 'vh') {
linePositions = [];
for(i = 0; i < Math.floor(positions.length / 2) - 1; i++) {
if(isNaN(positions[i * 2]) || isNaN(positions[i * 2 + 1])) {
linePositions.push(NaN);
linePositions.push(NaN);
linePositions.push(NaN);
linePositions.push(NaN);
}
else {
linePositions.push(positions[i * 2]);
linePositions.push(positions[i * 2 + 1]);
linePositions.push(positions[i * 2]);
linePositions.push(positions[i * 2 + 3]);
}
}
linePositions.push(positions[positions.length - 2]);
linePositions.push(positions[positions.length - 1]);
}
else {
linePositions = positions;
}
// If we have data with gaps, we ought to use rect joins
// FIXME: get rid of this
var hasNaN = false;
for(i = 0; i < linePositions.length; i++) {
if(isNaN(linePositions[i])) {
hasNaN = true;
break;
}
}
lineOptions.join = (hasNaN || linePositions.length > TOO_MANY_POINTS) ? 'rect' :
hasMarkers ? 'rect' : 'round';
// fill gaps
if(hasNaN && trace.connectgaps) {
var lastX = linePositions[0], lastY = linePositions[1];
for(i = 0; i < linePositions.length; i += 2) {
if(isNaN(linePositions[i]) || isNaN(linePositions[i + 1])) {
linePositions[i] = lastX;
linePositions[i + 1] = lastY;
}
else {
lastX = linePositions[i];
lastY = linePositions[i + 1];
}
}
}
lineOptions.positions = linePositions;
}
if(hasFill) {
fillOptions = {};
fillOptions.fill = trace.fillcolor;
fillOptions.thickness = 0;
fillOptions.closed = true;
}
if(hasMarkers) {
markerOptions = makeMarkerOptions(markerOpts);
selectedOptions = makeSelectedOptions(trace.selected, markerOpts);
unselectedOptions = makeSelectedOptions(trace.unselected, markerOpts);
markerOptions.positions = positions;
}
function makeSelectedOptions(selected, markerOpts) {
var options = {};
if(!selected) return options;
if(selected.marker && selected.marker.symbol) {
options = makeMarkerOptions(Lib.extendFlat({}, markerOpts, selected.marker));
}
// shortcut simple selection logic
else {
options = {};
if(selected.marker.size) options.sizes = selected.marker.size;
if(selected.marker.color) options.colors = selected.marker.color;
if(selected.marker.opacity !== undefined) options.opacity = selected.marker.opacity;
}
return options;
}
function makeMarkerOptions(markerOpts) {
var markerOptions = {};
var i;
var multiSymbol = Array.isArray(markerOpts.symbol);
var multiColor = Lib.isArrayOrTypedArray(markerOpts.color);
var multiLineColor = Lib.isArrayOrTypedArray(markerOpts.line.color);
var multiOpacity = Lib.isArrayOrTypedArray(markerOpts.opacity);
var multiSize = Lib.isArrayOrTypedArray(markerOpts.size);
var multiLineWidth = Lib.isArrayOrTypedArray(markerOpts.line.width);
var isOpen;
if(!multiSymbol) isOpen = OPEN_RE.test(markerOpts.symbol);
// prepare colors
if(multiSymbol || multiColor || multiLineColor || multiOpacity) {
markerOptions.colors = new Array(count);
markerOptions.borderColors = new Array(count);
var colors = formatColor(markerOpts, markerOpts.opacity, count);
var borderColors = formatColor(markerOpts.line, markerOpts.opacity, count);
if(!Array.isArray(borderColors[0])) {
var borderColor = borderColors;
borderColors = Array(count);
for(i = 0; i < count; i++) {
borderColors[i] = borderColor;
}
}
if(!Array.isArray(colors[0])) {
var color = colors;
colors = Array(count);
for(i = 0; i < count; i++) {
colors[i] = color;
}
}
markerOptions.colors = colors;
markerOptions.borderColors = borderColors;
for(i = 0; i < count; i++) {
if(multiSymbol) {
var symbol = markerOpts.symbol[i];
isOpen = OPEN_RE.test(symbol);
}
if(isOpen) {
borderColors[i] = colors[i].slice();
colors[i] = colors[i].slice();
colors[i][3] = 0;
}
}
markerOptions.opacity = trace.opacity;
}
else {
if(isOpen) {
markerOptions.color = rgba(markerOpts.color, 'uint8');
markerOptions.color[3] = 0;
markerOptions.borderColor = rgba(markerOpts.color, 'uint8');
} else {
markerOptions.color = rgba(markerOpts.color, 'uint8');
markerOptions.borderColor = rgba(markerOpts.line.color, 'uint8');
}
markerOptions.opacity = trace.opacity * markerOpts.opacity;
}
// prepare symbols
if(multiSymbol) {
markerOptions.markers = new Array(count);
for(i = 0; i < count; i++) {
markerOptions.markers[i] = getSymbolSdf(markerOpts.symbol[i]);
}
} else {
markerOptions.marker = getSymbolSdf(markerOpts.symbol);
}
// prepare sizes
var markerSizeFunc = makeBubbleSizeFn(trace);
var s;
if(multiSize || multiLineWidth) {
var sizes = markerOptions.sizes = new Array(count);
var borderSizes = markerOptions.borderSizes = new Array(count);
var sizeTotal = 0;
var sizeAvg;
if(multiSize) {
for(i = 0; i < count; i++) {
sizes[i] = markerSizeFunc(markerOpts.size[i]);
sizeTotal += sizes[i];
}
sizeAvg = sizeTotal / count;
} else {
s = markerSizeFunc(markerOpts.size);
for(i = 0; i < count; i++) {
sizes[i] = s;
}
}
// See https://github.com/plotly/plotly.js/pull/1781#discussion_r121820798
if(multiLineWidth) {
for(i = 0; i < count; i++) {
borderSizes[i] = markerSizeFunc(markerOpts.line.width[i]);
}
} else {
s = markerSizeFunc(markerOpts.line.width);
for(i = 0; i < count; i++) {
borderSizes[i] = s;
}
}
markerOptions.sizeAvg = sizeAvg;
} else {
markerOptions.size = markerSizeFunc(markerOpts && markerOpts.size || 10);
markerOptions.borderSizes = markerSizeFunc(markerOpts.line.width);
}
return markerOptions;
}
return {
line: lineOptions,
marker: markerOptions,
errorX: errorXOptions,
errorY: errorYOptions,
fill: fillOptions,
selected: selectedOptions,
unselected: unselectedOptions
};
}
// make sure scene exists on subplot, return it
function sceneUpdate(gd, subplot) {
var scene = subplot._scene;
var fullLayout = gd._fullLayout;
if(!subplot._scene) {
scene = subplot._scene = {
// number of traces in subplot, since scene:subplot → 1:1
count: 0,
// whether scene requires init hook in plot call (dirty plot call)
dirty: true,
// last used options
lineOptions: [],
fillOptions: [],
markerOptions: [],
selectedOptions: [],
unselectedOptions: [],
errorXOptions: [],
errorYOptions: [],
selectBatch: null,
unselectBatch: null,
// regl- component stubs, initialized in dirty plot call
fill2d: false,
scatter2d: false,
error2d: false,
line2d: false,
select2d: null
};
// apply new option to all regl components
scene.update = function update(opt) {
var opts = Array(scene.count);
for(var i = 0; i < scene.count; i++) {
opts[i] = opt;
}
if(scene.fill2d) scene.fill2d.update(opts);
if(scene.scatter2d) scene.scatter2d.update(opts);
if(scene.line2d) scene.line2d.update(opts);
if(scene.error2d) scene.error2d.update(opts.concat(opts));
if(scene.select2d) scene.select2d.update(opts);
scene.draw();
};
// draw traces in proper order
scene.draw = function draw() {
var i;
for(i = 0; i < scene.count; i++) {
if(scene.fill2d) scene.fill2d.draw(i);
}
for(i = 0; i < scene.count; i++) {
if(scene.line2d) {
scene.line2d.draw(i);
}
if(scene.error2d) {
scene.error2d.draw(i);
scene.error2d.draw(i + scene.count);
}
if(scene.scatter2d) {
// traces in no-selection mode
if(!scene.selectBatch || !scene.selectBatch[i]) {
scene.scatter2d.draw(i);
}
}
}
// draw traces in selection mode
if(scene.scatter2d && scene.select2d && scene.selectBatch) {
scene.select2d.draw(scene.selectBatch);
scene.scatter2d.draw(scene.unselectBatch);
}
scene.dirty = false;
};
// make sure canvas is clear
scene.clear = function clear() {
var vpSize = fullLayout._size;
var width = fullLayout.width;
var height = fullLayout.height;
var xaxis = subplot.xaxis;
var yaxis = subplot.yaxis;
var vp, gl, regl;
// multisubplot case
if(xaxis && xaxis.domain && yaxis && yaxis.domain) {
vp = [
vpSize.l + xaxis.domain[0] * vpSize.w,
vpSize.b + yaxis.domain[0] * vpSize.h,
(width - vpSize.r) - (1 - xaxis.domain[1]) * vpSize.w,
(height - vpSize.t) - (1 - yaxis.domain[1]) * vpSize.h
];
}
else {
vp = [
vpSize.l,
vpSize.b,
(width - vpSize.r),
(height - vpSize.t)
];
}
if(scene.select2d) {
regl = scene.select2d.regl;
gl = regl._gl;
gl.enable(gl.SCISSOR_TEST);
gl.scissor(vp[0], vp[1], vp[2] - vp[0], vp[3] - vp[1]);
gl.clearColor(0, 0, 0, 0);
gl.clear(gl.COLOR_BUFFER_BIT);
}
if(scene.scatter2d) {
regl = scene.scatter2d.regl;
gl = regl._gl;
gl.enable(gl.SCISSOR_TEST);
gl.scissor(vp[0], vp[1], vp[2] - vp[0], vp[3] - vp[1]);
gl.clearColor(0, 0, 0, 0);
gl.clear(gl.COLOR_BUFFER_BIT);
}
};
// remove selection
scene.clearSelect = function clearSelect() {
if(!scene.selectBatch) return;
scene.selectBatch = null;
scene.unselectBatch = null;
scene.scatter2d.update(scene.markerOptions);
scene.clear();
scene.draw();
};
// remove scene resources
scene.destroy = function destroy() {
if(scene.fill2d) scene.fill2d.destroy();
if(scene.scatter2d) scene.scatter2d.destroy();
if(scene.error2d) scene.error2d.destroy();
if(scene.line2d) scene.line2d.destroy();
if(scene.select2d) scene.select2d.destroy();
scene.lineOptions = null;
scene.fillOptions = null;
scene.markerOptions = null;
scene.selectedOptions = null;
scene.unselectedOptions = null;
scene.errorXOptions = null;
scene.errorYOptions = null;
scene.selectBatch = null;
scene.unselectBatch = null;
delete subplot._scene;
};
}
// In case if we have scene from the last calc - reset data
if(!scene.dirty) {
scene.dirty = true;
scene.count = 0;
scene.lineOptions = [];
scene.fillOptions = [];
scene.markerOptions = [];
scene.selectedOptions = [];
scene.unselectedOptions = [];
scene.errorXOptions = [];
scene.errorYOptions = [];
}
return scene;
}
function getSymbolSdf(symbol) {
if(symbol === 'circle') return null;
var symbolPath, symbolSdf;
var symbolNumber = Drawing.symbolNumber(symbol);
var symbolFunc = Drawing.symbolFuncs[symbolNumber % 100];
var symbolNoDot = !!Drawing.symbolNoDot[symbolNumber % 100];
var symbolNoFill = !!Drawing.symbolNoFill[symbolNumber % 100];
var isDot = DOT_RE.test(symbol);
// get symbol sdf from cache or generate it
if(SYMBOL_SDF[symbol]) return SYMBOL_SDF[symbol];
if(isDot && !symbolNoDot) {
symbolPath = symbolFunc(SYMBOL_SIZE * 1.1) + SYMBOL_SVG_CIRCLE;
}
else {
symbolPath = symbolFunc(SYMBOL_SIZE);
}
symbolSdf = svgSdf(symbolPath, {
w: SYMBOL_SDF_SIZE,
h: SYMBOL_SDF_SIZE,
viewBox: [-SYMBOL_SIZE, -SYMBOL_SIZE, SYMBOL_SIZE, SYMBOL_SIZE],
stroke: symbolNoFill ? SYMBOL_STROKE : -SYMBOL_STROKE
});
SYMBOL_SDF[symbol] = symbolSdf;
return symbolSdf || null;
}
function plot(gd, subplot, cdata) {
if(!cdata.length) return;
var fullLayout = gd._fullLayout;
var scene = cdata[0][0].t.scene;
var dragmode = fullLayout.dragmode;
// we may have more subplots than initialized data due to Axes.getSubplots method
if(!scene) return;
var vpSize = fullLayout._size;
var width = fullLayout.width;
var height = fullLayout.height;
// make sure proper regl instances are created
fullLayout._glcanvas.each(function(d) {
if(d.regl || d.pick) return;
d.regl = createRegl({
canvas: this,
attributes: {
antialias: !d.pick,
preserveDrawingBuffer: true
},
extensions: ['ANGLE_instanced_arrays', 'OES_element_index_uint'],
pixelRatio: gd._context.plotGlPixelRatio || global.devicePixelRatio
});
});
var regl = fullLayout._glcanvas.data()[0].regl;
// that is needed for fills
linkTraces(gd, subplot, cdata);
if(scene.dirty) {
// make sure scenes are created
if(scene.error2d === true) {
scene.error2d = createError(regl);
}
if(scene.line2d === true) {
scene.line2d = createLine(regl);
}
if(scene.scatter2d === true) {
scene.scatter2d = createScatter(regl);
}
if(scene.fill2d === true) {
scene.fill2d = createLine(regl);
}
// update main marker options
if(scene.line2d) {
scene.line2d.update(scene.lineOptions);
}
if(scene.error2d) {
var errorBatch = (scene.errorXOptions || []).concat(scene.errorYOptions || []);
scene.error2d.update(errorBatch);
}
if(scene.scatter2d) {
scene.scatter2d.update(scene.markerOptions);
}
// fill requires linked traces, so we generate it's positions here
if(scene.fill2d) {
scene.fillOptions = scene.fillOptions.map(function(fillOptions, i) {
var cdscatter = cdata[i];
if(!fillOptions || !cdscatter || !cdscatter[0] || !cdscatter[0].trace) return null;
var cd = cdscatter[0];
var trace = cd.trace;
var stash = cd.t;
var lineOptions = scene.lineOptions[i];
var last, j;
var pos = [], srcPos = (lineOptions && lineOptions.positions) || stash.positions;
if(trace.fill === 'tozeroy') {
pos = [srcPos[0], 0];
pos = pos.concat(srcPos);
pos.push(srcPos[srcPos.length - 2]);
pos.push(0);
}
else if(trace.fill === 'tozerox') {
pos = [0, srcPos[1]];
pos = pos.concat(srcPos);
pos.push(0);
pos.push(srcPos[srcPos.length - 1]);
}
else if(trace.fill === 'toself' || trace.fill === 'tonext') {
pos = [];
last = 0;
for(j = 0; j < srcPos.length; j += 2) {
if(isNaN(srcPos[j]) || isNaN(srcPos[j + 1])) {
pos = pos.concat(srcPos.slice(last, j));
pos.push(srcPos[last], srcPos[last + 1]);
last = j + 2;
}
}
pos = pos.concat(srcPos.slice(last));
if(last) {
pos.push(srcPos[last], srcPos[last + 1]);
}
}
else {
var nextTrace = trace._nexttrace;
if(nextTrace) {
var nextOptions = scene.lineOptions[i + 1];
if(nextOptions) {
var nextPos = nextOptions.positions;
if(trace.fill === 'tonexty') {
pos = srcPos.slice();
for(i = Math.floor(nextPos.length / 2); i--;) {
var xx = nextPos[i * 2], yy = nextPos[i * 2 + 1];
if(isNaN(xx) || isNaN(yy)) continue;
pos.push(xx);
pos.push(yy);
}
fillOptions.fill = nextTrace.fillcolor;
}
}
}
}
// detect prev trace positions to exclude from current fill
if(trace._prevtrace && trace._prevtrace.fill === 'tonext') {
var prevLinePos = scene.lineOptions[i - 1].positions;
// FIXME: likely this logic should be tested better
var offset = pos.length / 2;
last = offset;
var hole = [last];
for(j = 0; j < prevLinePos.length; j += 2) {
if(isNaN(prevLinePos[j]) || isNaN(prevLinePos[j + 1])) {
hole.push(j / 2 + offset + 1);
last = j + 2;
}
}
pos = pos.concat(prevLinePos);
fillOptions.hole = hole;
}
fillOptions.opacity = trace.opacity;
fillOptions.positions = pos;
return fillOptions;
});
scene.fill2d.update(scene.fillOptions);
}
}
var selectMode = dragmode === 'lasso' || dragmode === 'select';
// provide viewport and range
var vpRange = cdata.map(function(cdscatter) {
if(!cdscatter || !cdscatter[0] || !cdscatter[0].trace) return;
var cd = cdscatter[0];
var trace = cd.trace;
var stash = cd.t;
var id = stash.index;
var x = stash.x;
var y = stash.y;
var xaxis = subplot.xaxis || AxisIDs.getFromId(gd, trace.xaxis || 'x');
var yaxis = subplot.yaxis || AxisIDs.getFromId(gd, trace.yaxis || 'y');
var i;
var range = [
(xaxis._rl || xaxis.range)[0],
(yaxis._rl || yaxis.range)[0],
(xaxis._rl || xaxis.range)[1],
(yaxis._rl || yaxis.range)[1]
];
var viewport = [
vpSize.l + xaxis.domain[0] * vpSize.w,
vpSize.b + yaxis.domain[0] * vpSize.h,
(width - vpSize.r) - (1 - xaxis.domain[1]) * vpSize.w,
(height - vpSize.t) - (1 - yaxis.domain[1]) * vpSize.h
];
if(trace.selectedpoints || selectMode) {
if(!selectMode) selectMode = true;
if(!scene.selectBatch) scene.selectBatch = [];
if(!scene.unselectBatch) scene.unselectBatch = [];
// regenerate scene batch, if traces number changed during selection
if(trace.selectedpoints) {
scene.selectBatch[id] = trace.selectedpoints;
var selPts = trace.selectedpoints;
var selDict = {};
for(i = 0; i < selPts.length; i++) {
selDict[selPts[i]] = true;
}
var unselPts = [];
for(i = 0; i < stash.count; i++) {
if(!selDict[i]) unselPts.push(i);
}
scene.unselectBatch[id] = unselPts;
}
// precalculate px coords since we are not going to pan during select
var xpx = new Array(stash.count);
var ypx = new Array(stash.count);
for(i = 0; i < stash.count; i++) {
xpx[i] = xaxis.c2p(x[i]);
ypx[i] = yaxis.c2p(y[i]);
}
stash.xpx = xpx;
stash.ypx = ypx;
}
else {
stash.xpx = stash.ypx = null;
}
return trace.visible ? {
viewport: viewport,
range: range
} : null;
});
if(selectMode) {
// create select2d
if(!scene.select2d) {
// create scatter instance by cloning scatter2d
scene.select2d = createScatter(fullLayout._glcanvas.data()[1].regl, {clone: scene.scatter2d});
}
if(scene.scatter2d && scene.selectBatch && scene.selectBatch.length) {
// update only traces with selection
scene.scatter2d.update(scene.unselectedOptions.map(function(opts, i) {
return scene.selectBatch[i] ? opts : null;
}));
}
if(scene.select2d) {
scene.select2d.update(scene.markerOptions);
scene.select2d.update(scene.selectedOptions);
}
}
// uploat viewport/range data to GPU
if(scene.fill2d) {
scene.fill2d.update(vpRange);
}
if(scene.line2d) {
scene.line2d.update(vpRange);
}
if(scene.error2d) {
scene.error2d.update(vpRange.concat(vpRange));
}
if(scene.scatter2d) {
scene.scatter2d.update(vpRange);
}
if(scene.select2d) {
scene.select2d.update(vpRange);
}
scene.draw();
return;
}
function hoverPoints(pointData, xval, yval, hovermode) {
var cd = pointData.cd;
var stash = cd[0].t;
var trace = cd[0].trace;
var xa = pointData.xa;
var ya = pointData.ya;
var x = stash.x;
var y = stash.y;
var xpx = xa.c2p(xval);
var ypx = ya.c2p(yval);
var maxDistance = pointData.distance;
var ids;
// FIXME: make sure this is a proper way to calc search radius
if(stash.tree) {
var xl = xa.p2c(xpx - maxDistance);
var xr = xa.p2c(xpx + maxDistance);
var yl = ya.p2c(ypx - maxDistance);
var yr = ya.p2c(ypx + maxDistance);
if(hovermode === 'x') {
ids = stash.tree.range(
Math.min(xl, xr), Math.min(ya._rl[0], ya._rl[1]),
Math.max(xl, xr), Math.max(ya._rl[0], ya._rl[1])
);
}
else {
ids = stash.tree.range(
Math.min(xl, xr), Math.min(yl, yr),
Math.max(xl, xr), Math.max(yl, yr)
);
}
}
else if(stash.ids) {
ids = stash.ids;
}
else return [pointData];
// pick the id closest to the point
// note that point possibly may not be found
var minDist = maxDistance;
var id, ptx, pty, i, dx, dy, dist, dxy;
if(hovermode === 'x') {
for(i = 0; i < ids.length; i++) {
ptx = x[ids[i]];
dx = Math.abs(xa.c2p(ptx) - xpx);
if(dx < minDist) {