3D Streamtube Plots in JavaScript

How to make 3D streamtube plots in javascript.

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Introduction

In streamtube plots, attributes inlcude x, y, and z, which set the coorindates of the vector field, and u, v, and w, which sets the x, y, and z components of the vector field. Additionally, you can use starts to determine the streamtube's starting position. Lastly, maxdisplayed determines the maximum segments displayed in a streamtube.

Basic Streamtube Plot

d3.csv('https://raw.githubusercontent.com/plotly/datasets/master/streamtube-basic.csv', function(err, rows){

    function unpack(rows, key) {
        return rows.map(function(row) { return row[key]; });
    }

    var data = [{
      type: "streamtube",
      x: unpack(rows, 'x'),
      y: unpack(rows, 'y'),
      z: unpack(rows, 'z'),
      u: unpack(rows, 'u'),
      v: unpack(rows, 'v'),
      w: unpack(rows, 'w'),
      sizeref: 0.5,
      cmin: 0,
      cmax: 3
    }]

    var layout = {
      scene: {
        camera: {
          eye: {
          	x: -0.7243612458865182,
          	y: 1.9269804254717962,
          	z: 0.6704828299861716
          }
        }
      }
    }

    Plotly.newPlot('myDiv', data, layout)

});

Starting Position and Segments

d3.csv('https://raw.githubusercontent.com/plotly/datasets/master/streamtube-wind.csv', function(err, rows){

    function unpack(rows, key) {
        return rows.map(function(row) { return +row[key]; });
    }

    var data = [{
      type: 'streamtube',
      x: unpack(rows, 'x'),
      y: unpack(rows, 'y'),
      z: unpack(rows, 'z'),
      u: unpack(rows, 'u'),
      v: unpack(rows, 'v'),
      w: unpack(rows, 'w'),
      starts: {
        x: Array(16).fill(80),
        y: [20,30,40,50,20,30,40,50,20,30,40,50,20,30,40,50],
        z: [0,0,0,0,5,5,5,5,10,10,10,10,15,15,15,15]
      },
      sizeref: 0.3,
      colorscale: "Portland",
      showscale: false,
      maxdisplayed: 3000
    }]

    var layout = {
      scene: {
        aspectratio: {
          x: 2,
          y: 1,
          z: 0.3
        }
      },
      margin: {
        t: 20,
        b: 20,
        l: 20,
        r: 20
      },
      width: 600,
      height: 400
    }

    Plotly.newPlot('myDiv', data, layout);

});