The read-only depthDataFormat
property of an immersive-ar
XRSession
describes which depth sensing data format is used.
This property can return the following values:
luminance-alpha
-
2-byte unsigned integer data buffers (LUMINANCE_ALPHA
GLEnum
). CPU usage: interpret XRCPUDepthInformation.data
as Uint8Array
. GPU usage: inspect Luminance and Alpha channels to reassemble single value.
float32
-
4-byte floating point data buffers (R32F
GLEnum
). CPU usage: interpret XRCPUDepthInformation.data
as Float32Array
. GPU usage: inspect Red channel and use the value.
To request the desired data format, you need to specify a dataFormatPreference
when requesting a session using XRSystem.requestSession()
. Here, the caller is able to handle both "luminance-alpha" and "float32" formats. The order indicates preference for "luminance-alpha":
navigator.xr.requestSession("immersive-ar", {
requiredFeatures: ["depth-sensing"],
depthSensing: {
usagePreference: ["cpu-optimized", "gpu-optimized"],
formatPreference: ["luminance-alpha", "float32"],
},
});
To check which data format was selected by the user agent, you can call the depthDataFormat
property:
console.log(session.depthDataFormat);