Function getContext

stackgl_modules/index.js:18428–18439

(canvas, options)

}

function getContext(canvas, options) {
  var gl = null
  try {
    gl = canvas.getContext('webgl', options)
    if(!gl) {
      gl = canvas.getContext('experimental-webgl', options)
    }
  } catch(e) {
    return null
  }
  return gl
}

function roundUpPow10(x) {
  var y = Math.round(Math.log(Math.abs(x)) / Math.log(10))