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adding multitouch extension #142

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merged 9 commits into from
Jan 11, 2021
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adding multitouch extension #142

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adding multitouch extension
fernando-sony Oct 15, 2020
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Update extensions.html
fernando-80 Oct 29, 2020
01c0878
Update extensions.html
fernando-80 Oct 29, 2020
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Update extensions.html
fernando-80 Oct 29, 2020
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Update extensions.html
fernando-80 Oct 29, 2020
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Update extensions.html
fernando-80 Oct 29, 2020
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fernando-80 Oct 29, 2020
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Update extensions.html
fernando-80 Oct 30, 2020
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Merge branch 'gh-pages' into gh-pages
fernando-80 Oct 30, 2020
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57 changes: 57 additions & 0 deletions extensions.html
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Expand Up @@ -335,6 +335,56 @@ <h2><dfn>GamepadPose</dfn> Interface</h2>
</dl>
</section>

<section data-dfn-for="GamepadTouch">
<h2><dfn>GamepadTouch</dfn> Interface</h2>
<p>
This interface defines a single touch event on a gamepad device that
supports input. The event consists of a touch id that uniquely
identifies the touch point from the time the input medium (e.g. finger,
stylus, etc) makes contact with the touch device, up to the time the
input medium is no longer making contact with the touch device.
</p>

<pre class="idl">
[Exposed=Window, SecureContext]
interface GamepadTouch {
readonly attribute unsigned long touchId;
readonly attribute octet surfaceId;
readonly attribute Float32Array position;
readonly attribute Uint32Array? surfaceDimensions;
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Why not just an empty array?

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Hi @marcoscaceres we thought about representing the absent surfaceDimensions with "null". Would there be any advantages to use the empty array instead? thanks~

};
</pre>

<dl>
<dt><dfn>touchId</dfn> attribute</dt>
<dd>
Unique id of the touch event. Range is [0, 4294967295]. The user agent
is responsible for incrementing the touchId for each subsequent touch
event based on information provided by the device API. {{GamepadTouch/touchId}} SHOULD
be set to a default value of 0 when a new {{Gamepad}} object is created.
</dd>

<dt><dfn>surfaceId</dfn></dt>
<dd>
Unique id of the surface that generated the touch event.
</dd>

<dt><dfn>position</dfn></dt>
<dd>
x, y coordinates of the touch event. Range of each coordinate is
normalized to [-1.0, 1.0]. Along the x-axis, -1.0 references the
leftmost coordinate and 1.0 references the rightmost coordinate. Along
the y-axis, -1.0 references the topmost coordinate and 1.0 references
the bottommost coordinate. MUST be a two-element array.
</dd>

<dt><dfn>surfaceDimensions</dfn></dt>
<dd>
Width and height of the touch surface in integer units. When not
<code>null</code>, MUST be a two-element array.
</dl>
</section>

<section>
<h2>Partial <dfn>Gamepad</dfn> Interface</h2>
<p>
Expand All @@ -347,6 +397,7 @@ <h2>Partial <dfn>Gamepad</dfn> Interface</h2>
readonly attribute GamepadHand hand;
readonly attribute FrozenArray&lt;GamepadHapticActuator> hapticActuators;
readonly attribute GamepadPose? pose;
readonly attribute FrozenArray&lt;GamepadTouch>? touchEvents;
};
</pre>

Expand All @@ -371,6 +422,12 @@ <h2>Partial <dfn>Gamepad</dfn> Interface</h2>
hardware cannot supply any pose values, MUST be set to
<code>null</code>.
</dd>

<dt><dfn>touchEvents</dfn></dt>
<dd>
A list of touch events generated from all touch surfaces. <code>null</code>
if the device does not support touch events.
</dd>
</dl>
</section>
</body>
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