The read-only baseLayer
property of the XRRenderState
interface returns the XRWebGLLayer
instance that is the source of bitmap images and a description of how the image is to be rendered in the device.
This property is read-only; however, you can indirectly change its value using XRSession.updateRenderState
.
A XRWebGLLayer
object which is used as the source of the world's contents when rendering each frame of the scene.
See the examples below to see how to use updateRenderState()
to set the current XRWebGLLayer
used for rendering the scene.
You can set the XRWebGLLayer
used for rendering by calling updateRenderState()
, like this:
let canvas = document.querySelector("canvas");
gl = canvas.getContext("webgl", { xrCompatible: true });
setNewWebGLLayer();
function setNewWebGLLayer(gl) {
if (!gl) {
return;
}
xrSession.updateRenderState({
baseLayer: new XRWebGLLayer(xrSession, gl),
});
}
Here, the canvas obtained in the first line is the canvas into which WebGL is going to draw. That context is passed into new
XRWebGLLayer()
to create an XRWebGLLayer
which uses the contents of the WebGL context gl
as the source of the world's image during presentation.