XREquirectLayer: lowerVerticalAngle property

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

The lowerVerticalAngle property of the XREquirectLayer interface represents the lower vertical angle in radians for the sphere.


A number representing the lower vertical angle in radians for the sphere. Setting lowerVerticalAngle to a value less than -π/2 will set it to -π/2 and setting it to a value higher than π/2 will set it to π/2.


Getting a layer's lower vertical angle

The XRWebGLBinding.createEquirectLayer() method creates an equirect layer and allows specifying a lowerVerticalAngle. The XREquirectLayer.lowerVerticalAngle property can be used after layer creation to get the lower vertical 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.lowerVerticalAngle; // -1.5707963267948966


WebXR Layers API Level 1
# dom-xrequirectlayer-lowerverticalangle

Browser compatibility

BCD tables only load in the browser

See also