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		The <dfn attribute for="XRBoundedReferenceSpace">boundsGeometry</dfn> attribute describes the border around the {{XRBoundedReferenceSpace}}, which the user can expect to safely move within.
		Each {{XRBoundedReferenceSpace}} has a <dfn for="XRBoundedReferenceSpace">natural bounds geometry</dfn> describing the border around the {{XRBoundedReferenceSpace}}, which the user can expect to safely move within. The polygonal boundary is given as an array of {{DOMPointReadOnly}}s, which represents a loop of points at the edges of the safe space. The points describe offsets from the [=XRSpace/native origin=] in meters. Points MUST be given in a clockwise order as viewed from above, looking towards the negative end of the Y axis. The {{DOMPointReadOnly/y}} value of each point MUST be <code>0</code> and the {{DOMPointReadOnly/w}} value of each point MUST be <code>1</code>. The bounds can be considered to originate at the floor and extend infinitely high. The shape it describes MAY be convex or concave.

		The <dfn attribute for="XRBoundedReferenceSpace">boundsGeometry</dfn> attribute is an array of {{DOMPointReadOnly}}s such that each entry is equal to the entry in the {{XRBoundedReferenceSpace}}'s [=XRBoundedReferenceSpace/natural bounds geometry=] [=multiply transforms\|multiplied=] by the {{XRReferenceSpace/originOffset}}. In other words, it provides the same border around the {{XRBoundedReferenceSpace}} relative to the [=XRSpace/effective origin=].

		Note: Other XR platforms sometimes refer to the type of tracking offered by a {{bounded}} reference space as "room scale" tracking. An {{XRBoundedReferenceSpace}} is not intended to describe multi-room spaces, areas with uneven floor levels, or very large open areas. Content that needs to handle those scenarios should use an {{XRUnboundedReferenceSpace}}.

		The <dfn attribute for="XRBoundedReferenceSpace">boundsGeometry</dfn> attribute describes the border around the {{XRBoundedReferenceSpace}}, which the user can expect to safely move within.
		Each {{XRBoundedReferenceSpace}} has a <dfn for="XRBoundedReferenceSpace">natural bounds geometry</dfn> describing the border around the {{XRBoundedReferenceSpace}}, which the user can expect to safely move within. The polygonal boundary is given as an array of {{DOMPointReadOnly}}s, which represents a loop of points at the edges of the safe space. The points describe offsets from the [=XRSpace/native origin=] in meters. Points MUST be given in a clockwise order as viewed from above, looking towards the negative end of the Y axis. The {{DOMPointReadOnly/y}} value of each point MUST be <code>0</code> and the {{DOMPointReadOnly/w}} value of each point MUST be <code>1</code>. The bounds can be considered to originate at the floor and extend infinitely high. The shape it describes MAY be convex or concave.

		Each {{XRBoundedReferenceSpace}} has a <dfn for="XRBoundedReferenceSpace">natural bounds geometry</dfn> describing the border around the {{XRBoundedReferenceSpace}}, which the user can expect to safely move within. The polygonal boundary is given as an array of {{DOMPointReadOnly}}s, which represents a loop of points at the edges of the safe space. The points describe offsets from the [=XRSpace/native origin=] in meters. Points MUST be given in a clockwise order as viewed from above, looking towards the negative end of the Y axis. The {{DOMPointReadOnly/y}} value of each point MUST be <code>0</code> and the {{DOMPointReadOnly/w}} value of each point MUST be <code>1</code>. The bounds can be considered to originate at the floor and extend infinitely high. The shape it describes MAY be convex or concave.

		The polygonal boundary is given as an array of {{DOMPointReadOnly}}s, which represents a loop of points at the edges of the safe space. The points describe offsets from the {{XRReferenceSpace}} origin in meters. Points MUST be given in a clockwise order as viewed from above, looking towards the negative end of the Y axis. The {{DOMPointReadOnly/y}} value of each point MUST be <code>0</code> and the {{DOMPointReadOnly/w}} value of each point MUST be <code>1</code>. The bounds can be considered to originate at the floor and extend infinitely high. The shape it describes MAY be convex or concave.
		The <dfn attribute for="XRBoundedReferenceSpace">boundsGeometry</dfn> attribute is an array of {{DOMPointReadOnly}}s such that each entry is equal to the entry in the {{XRBoundedReferenceSpace}}'s [=XRBoundedReferenceSpace/natural bounds geometry=] multiplied by the {{XRReferenceSpace/inverse}} of the {{XRReferenceSpace/originOffset}}. In other words, it provides the same border around the {{XRBoundedReferenceSpace}} relative to the [=XRSpace/effective origin=].

toji approved these changes May 1, 2019