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| 1 | +/** |
| 2 | +* Copyright 2012-2016, Plotly, Inc. |
| 3 | +* All rights reserved. |
| 4 | +* |
| 5 | +* This source code is licensed under the MIT license found in the |
| 6 | +* LICENSE file in the root directory of this source tree. |
| 7 | +*/ |
| 8 | + |
| 9 | +'use strict'; |
| 10 | + |
| 11 | +var createpointcloud = require('gl-pointcloud2d'); |
| 12 | +var isNumeric = require('fast-isnumeric'); |
| 13 | + |
| 14 | +var str2RGBArray = require('../../lib/str2rgbarray'); |
| 15 | +var getTraceColor = require('../scatter/get_trace_color'); |
| 16 | + |
| 17 | +var AXES = ['xaxis', 'yaxis']; |
| 18 | + |
| 19 | +function Pointcloud(scene, uid) { |
| 20 | + this.scene = scene; |
| 21 | + this.uid = uid; |
| 22 | + |
| 23 | + this.pickXData = []; |
| 24 | + this.pickYData = []; |
| 25 | + this.xData = []; |
| 26 | + this.yData = []; |
| 27 | + this.textLabels = []; |
| 28 | + this.color = 'rgb(0, 0, 0)'; |
| 29 | + this.name = ''; |
| 30 | + this.hoverinfo = 'all'; |
| 31 | + |
| 32 | + this.idToIndex = []; |
| 33 | + this.bounds = [0, 0, 0, 0]; |
| 34 | + |
| 35 | + this.pointcloudOptions = { |
| 36 | + positions: new Float32Array(0), |
| 37 | + size: 12, |
| 38 | + color: [0, 0, 0, 1], |
| 39 | + borderSize: 1, |
| 40 | + borderColor: [0, 0, 0, 1] |
| 41 | + }; |
| 42 | + this.pointcloud = createpointcloud(scene.glplot, this.pointcloudOptions); |
| 43 | + this.pointcloud._trace = this; // scene2d requires this prop |
| 44 | +} |
| 45 | + |
| 46 | +var proto = Pointcloud.prototype; |
| 47 | + |
| 48 | +proto.handlePick = function(pickResult) { |
| 49 | + |
| 50 | + var index = this.idToIndex[pickResult.pointId]; |
| 51 | + |
| 52 | + return { |
| 53 | + trace: this, |
| 54 | + dataCoord: pickResult.dataCoord, |
| 55 | + traceCoord: [ |
| 56 | + this.pickXData[index], |
| 57 | + this.pickYData[index] |
| 58 | + ], |
| 59 | + textLabel: Array.isArray(this.textLabels) ? |
| 60 | + this.textLabels[index] : |
| 61 | + this.textLabels, |
| 62 | + color: Array.isArray(this.color) ? |
| 63 | + this.color[index] : |
| 64 | + this.color, |
| 65 | + name: this.name, |
| 66 | + hoverinfo: this.hoverinfo |
| 67 | + }; |
| 68 | +}; |
| 69 | + |
| 70 | +/** |
| 71 | + * Truncate a Float32Array to some length. A wrapper to support environments |
| 72 | + * (e.g. node-webkit) that do not implement Float32Array.prototype.slice |
| 73 | + */ |
| 74 | +function truncate(float32ArrayIn, len) { |
| 75 | + if(Float32Array.slice === undefined) { |
| 76 | + var float32ArrayOut = new Float32Array(len); |
| 77 | + for(var i = 0; i < len; i++) float32ArrayOut[i] = float32ArrayIn[i]; |
| 78 | + return float32ArrayOut; |
| 79 | + } |
| 80 | + |
| 81 | + return float32ArrayIn.slice(0, len); |
| 82 | +} |
| 83 | + |
| 84 | +proto.update = function(options) { |
| 85 | + |
| 86 | + this.textLabels = options.text; |
| 87 | + this.name = options.name; |
| 88 | + this.hoverinfo = options.hoverinfo; |
| 89 | + this.bounds = [Infinity, Infinity, -Infinity, -Infinity]; |
| 90 | + |
| 91 | + this.updateFast(options); |
| 92 | + |
| 93 | + this.color = getTraceColor(options, {}); |
| 94 | +}; |
| 95 | + |
| 96 | +proto.updateFast = function(options) { |
| 97 | + var x = this.xData = this.pickXData = options.x; |
| 98 | + var y = this.yData = this.pickYData = options.y; |
| 99 | + |
| 100 | + var len = x.length, |
| 101 | + idToIndex = new Array(len), |
| 102 | + positions = new Float32Array(2 * len), |
| 103 | + bounds = this.bounds, |
| 104 | + pId = 0, |
| 105 | + ptr = 0; |
| 106 | + |
| 107 | + var xx, yy; |
| 108 | + |
| 109 | + // TODO add 'very fast' mode that bypasses this loop |
| 110 | + // TODO bypass this on modebar +/- zoom |
| 111 | + for(var i = 0; i < len; ++i) { |
| 112 | + xx = x[i]; |
| 113 | + yy = y[i]; |
| 114 | + |
| 115 | + // check for isNaN is faster but doesn't skip over nulls |
| 116 | + if(!isNumeric(xx) || !isNumeric(yy)) continue; |
| 117 | + |
| 118 | + idToIndex[pId++] = i; |
| 119 | + |
| 120 | + positions[ptr++] = xx; |
| 121 | + positions[ptr++] = yy; |
| 122 | + |
| 123 | + bounds[0] = Math.min(bounds[0], xx); |
| 124 | + bounds[1] = Math.min(bounds[1], yy); |
| 125 | + bounds[2] = Math.max(bounds[2], xx); |
| 126 | + bounds[3] = Math.max(bounds[3], yy); |
| 127 | + } |
| 128 | + |
| 129 | + positions = truncate(positions, ptr); |
| 130 | + this.idToIndex = idToIndex; |
| 131 | + |
| 132 | + var markerSize; |
| 133 | + |
| 134 | + this.pointcloudOptions.positions = positions; |
| 135 | + |
| 136 | + var markerColor = str2RGBArray(options.marker.color), |
| 137 | + borderColor = str2RGBArray(options.marker.line.color), |
| 138 | + opacity = options.opacity * options.marker.opacity; |
| 139 | + |
| 140 | + markerColor[3] *= opacity; |
| 141 | + this.pointcloudOptions.color = markerColor; |
| 142 | + |
| 143 | + borderColor[3] *= opacity; |
| 144 | + this.pointcloudOptions.borderColor = borderColor; |
| 145 | + |
| 146 | + markerSize = options.marker.size; |
| 147 | + this.pointcloudOptions.size = markerSize; |
| 148 | + this.pointcloudOptions.borderSize = options.marker.line.width; |
| 149 | + |
| 150 | + this.pointcloud.update(this.pointcloudOptions); |
| 151 | + |
| 152 | + // add item for autorange routine |
| 153 | + this.expandAxesFast(bounds, markerSize); |
| 154 | +}; |
| 155 | + |
| 156 | +proto.expandAxesFast = function(bounds, markerSize) { |
| 157 | + var pad = markerSize || 10; |
| 158 | + var ax, min, max; |
| 159 | + |
| 160 | + for(var i = 0; i < 2; i++) { |
| 161 | + ax = this.scene[AXES[i]]; |
| 162 | + |
| 163 | + min = ax._min; |
| 164 | + if(!min) min = []; |
| 165 | + min.push({ val: bounds[i], pad: pad }); |
| 166 | + |
| 167 | + max = ax._max; |
| 168 | + if(!max) max = []; |
| 169 | + max.push({ val: bounds[i + 2], pad: pad }); |
| 170 | + } |
| 171 | +}; |
| 172 | + |
| 173 | +proto.dispose = function() { |
| 174 | + this.pointcloud.dispose(); |
| 175 | +}; |
| 176 | + |
| 177 | +function createPointcloud(scene, data) { |
| 178 | + var plot = new Pointcloud(scene, data.uid); |
| 179 | + plot.update(data); |
| 180 | + return plot; |
| 181 | +} |
| 182 | + |
| 183 | +module.exports = createPointcloud; |
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