y property indicates the offset from the bottom edge of
the destination surface (typically a
XRWebGLLayer to the bottom edge of
the viewport within the surface into which WebXR content is to be rendered. The
x property identifies the
component of the origin, and its is given by the
y = xrViewport.y;
The offset from the bottom edge of the rendering surface to the bottom edge of the viewport, in pixels.
Note: Although other web APIs typically consider the
axis to begin at the top and grow larger progressing downward, WebGL reverses this,
y growing larger as it goes upward on the screen.
See the main
XRViewport page for examples.
|WebXR Device API
The definition of 'XRViewport.y' in that specification.
|Working Draft||Initial definition.|
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