XRCPUDepthInformation: data property
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The read-only data
property of the XRCPUDepthInformation
interface is an ArrayBuffer
containing depth-buffer information in raw format.
The data is stored in row-major format, without padding, with each entry corresponding to distance from the view's near plane to the users' environment, in unspecified units. The size of each data entry and the type is determined by depthDataFormat
. The values can be converted from unspecified units to meters by multiplying them by rawValueToMeters
. The normDepthBufferFromNormView
property can be used to transform from normalized view coordinates (an origin in the top left corner of the view, with X axis growing to the right, and Y axis growing downward) into the depth buffer's coordinate system.
Value
An ArrayBuffer
.
Examples
Use XRFrame.getDepthInformation()
to obtain depth information. The returned XRCPUDepthInformation
object will contain the data
buffer.
For CPU depth information and a buffer that has "luminance-alpha" format:
js
const uint16 = new Uint16Array(depthInfo.data);
const index = column + row * depthInfo.width;
const depthInMeters = uint16[index] * depthInfo.rawValueToMeters;
(Use Float32Array
for a "float32" data format.)
Note that the depth in meters is in depth-buffer coordinates. Additional steps are needed to convert them to normalized view coordinates, or the XRCPUDepthInformation.getDepthInMeters()
method can be used.
Specifications
Specification |
---|
WebXR Depth Sensing Module # dom-xrcpudepthinformation-data |
Browser compatibility
BCD tables only load in the browser