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scatterPlot.js
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scatterPlot.js
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import * as d3 from "d3";
import dataTransform from "../dataTransform.js";
import component from "../component.js";
import { dispatch } from "../events.js";
import { createScene } from "../base.js";
/**
* Reusable 3D Scatter Plot Chart
*
* @module
*
* @example
* let chartHolder = d3.select("#chartholder");
*
* let myData = [...];
*
* let myChart = d3.x3d.chart.scatterPlot();
*
* chartHolder.datum(myData).call(myChart);
*
* @see https://datavizproject.com/data-type/3d-scatterplot/
*/
export default function() {
/* Default Properties */
let width = 500;
let height = 500;
let dimensions = { x: 40, y: 40, z: 40 };
let colors = ["orange"];
let color;
let classed = "d3X3dScatterPlot";
let mappings;
let debug = false;
/* Scales */
let xScale;
let yScale;
let zScale;
let colorScale;
let sizeScale;
let sizeRange = [0.2];
/* Components */
const viewpoint = component.viewpoint();
const axis = component.axisThreePlane();
const crosshair = component.crosshair();
const label = component.label();
const bubbles = component.bubbles();
/**
* Initialise Data and Scales
*
* @private
* @param {Array} data - Chart data.
*/
const init = function(data) {
let newData = {};
['x', 'y', 'z', 'size', 'color'].forEach((dimension) => {
let set = {
key: dimension,
values: []
};
data.values.forEach((d) => {
let key = mappings[dimension];
let value = d.values.find((v) => v.key === key).value;
set.values.push({ key: key, value: value });
});
newData[dimension] = dataTransform(set).summary();
});
let extentX = newData.x.valueExtent;
let extentY = newData.y.valueExtent;
let extentZ = newData.z.valueExtent;
let extentSize = newData.size.valueExtent;
let extentColor = newData.color.valueExtent;
xScale = d3.scaleLinear()
.domain(extentX)
.range([0, dimensions.x]);
yScale = d3.scaleLinear()
.domain(extentY)
.range([0, dimensions.y]);
zScale = d3.scaleLinear()
.domain(extentZ)
.range([0, dimensions.z]);
sizeScale = d3.scaleLinear()
.domain(extentSize)
.range(sizeRange);
if (color) {
colorScale = d3.scaleQuantize()
.domain(extentColor)
.range([color, color]);
} else {
colorScale = d3.scaleQuantize()
.domain(extentColor)
.range(colors);
}
};
/**
* Constructor
*
* @constructor
* @alias scatterPlot
* @param {d3.selection} selection - The chart holder D3 selection.
*/
const my = function(selection) {
const layers = ["axis", "bubbles", "crosshair", "label"];
const scene = createScene(selection, layers, classed, width, height, debug);
selection.each((data) => {
init(data);
// Add Viewpoint
viewpoint.centerOfRotation([dimensions.x / 2, dimensions.y / 2, dimensions.z / 2]);
scene.call(viewpoint);
// Add Axis
axis.xScale(xScale)
.yScale(yScale)
.zScale(zScale);
scene.select(".axis")
.call(axis);
// Add Crosshair
crosshair.xScale(xScale)
.yScale(yScale)
.zScale(zScale);
// Add Labels
label.xScale(xScale)
.yScale(yScale)
.zScale(zScale)
.offset(0.5);
// Add Bubbles
bubbles.xScale(xScale)
.yScale(yScale)
.zScale(zScale)
.sizeScale(sizeScale)
.colorScale(colorScale)
.mappings(mappings)
.on("d3X3dClick", function(e) {
const datum = d3.select(e.target).datum();
let xVal = datum.values.find((v) => v.key === "x").value;
let yVal = datum.values.find((v) => v.key === "y").value;
let zVal = datum.values.find((v) => v.key === "z").value;
const d = { x: xVal, y: yVal, z: zVal };
scene.select(".crosshair")
.datum(d)
.each(function() {
d3.select(this).call(crosshair);
});
})
.on("d3X3dMouseOver", function(e) {
const datum = d3.select(e.target).datum();
let xVal = datum.values.find((v) => v.key === "x").value;
let yVal = datum.values.find((v) => v.key === "y").value;
let zVal = datum.values.find((v) => v.key === "z").value;
const d = { x: xVal, y: yVal, z: zVal, key: datum.key };
scene.select(".label")
.datum(d)
.each(function() {
d3.select(this).call(label);
});
})
.on("d3X3dMouseOut", function(e) {
scene.select(".label")
.selectAll("*")
.remove();
});
scene.select(".bubbles")
.datum(data)
.call(bubbles);
});
};
/**
* Width Getter / Setter
*
* @param {number} _v - X3D canvas width in px.
* @returns {*}
*/
my.width = function(_v) {
if (!arguments.length) return width;
width = _v;
return this;
};
/**
* Height Getter / Setter
*
* @param {number} _v - X3D canvas height in px.
* @returns {*}
*/
my.height = function(_v) {
if (!arguments.length) return height;
height = _v;
return this;
};
/**
* Dimensions Getter / Setter
*
* @param {{x: number, y: number, z: number}} _v - 3D object dimensions.
* @returns {*}
*/
my.dimensions = function(_v) {
if (!arguments.length) return dimensions;
dimensions = _v;
return this;
};
/**
* X Scale Getter / Setter
*
* @param {d3.scale} _v - D3 scale.
* @returns {*}
*/
my.xScale = function(_v) {
if (!arguments.length) return xScale;
xScale = _v;
return my;
};
/**
* Y Scale Getter / Setter
*
* @param {d3.scale} _v - D3 scale.
* @returns {*}
*/
my.yScale = function(_v) {
if (!arguments.length) return yScale;
yScale = _v;
return my;
};
/**
* Z Scale Getter / Setter
*
* @param {d3.scale} _v - D3 scale.
* @returns {*}
*/
my.zScale = function(_v) {
if (!arguments.length) return zScale;
zScale = _v;
return my;
};
/**
* Size Scale Getter / Setter
*
* @param {d3.scale} _v - D3 color scale.
* @returns {*}
*/
my.sizeScale = function(_v) {
if (!arguments.length) return sizeScale;
sizeScale = _v;
return my;
};
/**
* Size Range Getter / Setter
*
* @param {number[]} _v - Size min and max (e.g. [1, 9]).
* @returns {*}
*/
my.sizeRange = function(_v) {
if (!arguments.length) return sizeRange;
sizeRange = _v;
return my;
};
/**
* Color Scale Getter / Setter
*
* @param {d3.scale} _v - D3 color scale.
* @returns {*}
*/
my.colorScale = function(_v) {
if (!arguments.length) return colorScale;
colorScale = _v;
return my;
};
/**
* Color Getter / Setter
*
* @param {string} _v - Color (e.g. "red" or "#ff0000").
* @returns {*}
*/
my.color = function(_v) {
if (!arguments.length) return color;
color = _v;
return my;
};
/**
* Colors Getter / Setter
*
* @param {Array} _v - Array of colours used by color scale.
* @returns {*}
*/
my.colors = function(_v) {
if (!arguments.length) return colors;
colors = _v;
return my;
};
/**
* Size Scale Getter / Setter
*
* @param {d3.scale} _v - D3 color scale.
* @returns {*}
*/
my.sizeScale = function(_v) {
if (!arguments.length) return sizeScale;
sizeScale = _v;
return my;
};
/**
* Size Range Getter / Setter
*
* @param {number[]} _v - Size min and max (e.g. [0.5, 3.0]).
* @returns {*}
*/
my.sizeRange = function(_v) {
if (!arguments.length) return sizeRange;
sizeRange = _v;
return my;
};
/**
* Mappings Getter / Setter
*
* @param {Object} _v - Map properties to size, colour etc.
* @returns {*}
*/
my.mappings = function(_v) {
if (!arguments.length) return mappings;
mappings = _v;
return my;
};
/**
* Debug Getter / Setter
*
* @param {boolean} _v - Show debug log and stats. True/False.
* @returns {*}
*/
my.debug = function(_v) {
if (!arguments.length) return debug;
debug = _v;
return my;
};
/**
* Dispatch On Getter
*
* @returns {*}
*/
my.on = function() {
let value = dispatch.on.apply(dispatch, arguments);
return value === dispatch ? my : value;
};
return my;
}