regl-atmosphere-envmap

Easily generate an environment map, or skybox, of Earth atmosphere given a 3D vector representing the direction of the sun.

Install

npm install regl-atmosphere-envmap

Usage

const createAtmosphereRenderer = require("regl-atmosphere-envmap");

const renderAtmosphere = createAtmosphereRenderer(regl);

const envMap = renderAtmosphere(opts);

createAtmosphereRenderer takes a regl context as a parameter, and returns the function renderAtmosphere.

renderAtmosphere takes an opts parameter and returns a regl framebufferCube object that can be immediately used as a samplerCube in your shaders, or passed back into the renderAtmosphere function to update it.

The opts parameter is an object with the following (optional) members:

• sunDirection: the vector that points from the origin to the sun, 3D vector, default [0, 0.25, -1.0]
• resolution: the resolution of each square face of the environment cubemap if cubeFBO is not provided, int, default 1024
• cubeFBO: the regl framebufferCube object that will be returned, default regl.framebufferCube(opts.resolution)