XREquirectLayer: centralHorizontalAngle property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The centralHorizontalAngle property of the XREquirectLayer interface represents the central horizontal angle in radians for the sphere.


A number representing the central horizontal angle in radians for the sphere. Setting centralHorizontalAngle to a value less than 0 will set it to 0 and setting it to a value higher than 2π will set it to 2π.


Getting a layer's central horizontal angle

The XRWebGLBinding.createEquirectLayer() method creates an equirect layer and allows specifying a centralHorizontalAngle. The XREquirectLayer.centralHorizontalAngle property can be used after layer creation to get the central horizontal angle used or to set it to a new one.

const equirectLayer = xrGlBinding.createEquirectLayer({
  space: xrReferenceSpace,
  viewPixelWidth: 1200,
  viewPixelHeight: 600,
  centralHorizontalAngle: 2 * Math.PI,
  upperVerticalAngle: Math.PI / 2.0,
  lowerVerticalAngle: -Math.PI / 2.0,
  radius: 0,

equirectLayer.centralHorizontalAngle; // 6.283185307179586


WebXR Layers API Level 1
# dom-xrequirectlayer-centralhorizontalangle

Browser compatibility

BCD tables only load in the browser

See also