XRWebGLSubImage.imageIndex
The read-only imageIndex
property of the XRWebGLSubImage
interface is a number representing the offset into the texture array if the layer was requested with texture-array
; null
otherwise.
Value
A number or null
if the layer wasn't requested with texture-array
.
Using imageIndex
The imageIndex
property can be passed WebGL2RenderingContext.framebufferTextureLayer()
to attach the depth and color textures to a framebuffer with the correct layer index.
const xrGlBinding = new XRWebGLBinding(xrSession, gl);
const layer = xrGlBinding.createProjectionLayer({ textureType: "texture-array" });
const framebuffer = gl.createFramebuffer();
xrSession.updateRenderState({ layers: [layer] });
xrSession.requestAnimationFrame(onXRFrame);
function onXRFrame(time, xrFrame) {
xrSession.requestAnimationFrame(onXRFrame);
gl.bindFramebuffer(gl.FRAMEBUFFER, framebuffer);
let viewport = xrGlBinding.getSubImage(layer, xrFrame).viewport;
gl.viewport(viewport.x, viewport.y, viewport.width, viewport.height);
for (let view in xrViewerPose.views) {
let subImage = xrGlBinding.getViewSubImage(layer, view);
gl.framebufferTextureLayer(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0,
subImage.colorTexture, 0, subImage.imageIndex);
gl.framebufferTextureLayer(gl.FRAMEBUFFER, gl.DEPTH_ATTACHMENT,
subImage.depthStencilTexture, 0, subImage.imageIndex);
// Render from the viewpoint of xrView
}
}
Specifications
No specification found
No specification data found for api.XRWebGLSubImage.imageIndex
.
Check for problems with this page or contribute a missing spec_url
to mdn/browser-compat-data. Also make sure the specification is included in w3c/browser-specs.
Browser compatibility
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.
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