gl-streamtube3d

Visualization module for vector fields.

Example

var createScene    = require('gl-plot3d')
var createMesh     = require('gl-mesh3d')
var createStreamTube = require('gl-streamtube3d')
var wind           = require('dataset-wind')
 
var scene = createScene()
 
var bounds = [];
 
var streamTube = createStreamTube({
    startingPositions: positionsArray,
    maxLength: 1000,
    getVelocity: velocityFunction,
    colormap: 'portland'
}, bounds)
 
var mesh = createMesh(gl, streamTube)
 
scene.add(mesh)

Try out the example in your browser

Install

npm i gl-streamtube3d

Basic interface

Constructor

var streamTube = require('gl-streamtube3d')(params, bounds)

Creates a stream tube plot of a vector field.

• params is an object that has the following properties:

  • startingPositions (Required) An array of starting positions for the vector field, encoded as arrays.
  • getVelocity(point) (Optional) A getter function to get the velocity at a given point.
  • getDivergence(point) (Optional) A getter function to get the divergence at a given point. Used for the width of the streamtube. Defaults to the divergence of the getVelocity function.
  • maxLength (Optional) The maximum number of segments to add to a streamtube. Default is 1000.
  • tubeSize (Optional) The scaling factor for the streamtubes. The default is 1, which avoids two max divergence tubes from touching at adjacent starting positions.
  • absoluteTubeSize (Optional) Absolute scaling factor for the streamtubes. A value of 1 scales divergence of 1 to 1 coordinate system unit. Overrides tubeSize.
  • colormap (Optional) The colormap to use.

Returns A streamtube plot object that can be passed to gl-mesh3d.

Credits

(c) 2013-2017 Mikola Lysenko, Ilmari Heikkinen. MIT License