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Re: Drawing Tablets

From: Charles Pritchard <chuck@jumis.com>
Date: Thu, 2 Aug 2012 23:09:16 -0700
Message-Id: <CFB585B1-4F2B-44DC-A81E-B0817C4BD559@jumis.com>
Cc: "public-webapps@w3.org" <public-webapps@w3.org>
To: Florian Bösch <pyalot@gmail.com>
Touch events v2 has some properties, such as pressure InkML covers the full serialization of captured data.

The Gamepad API is the closest implementation in browsers (Chrome) and Wacom's Air implementation one of the closest in an HTML environment.


-Charles


On Jul 31, 2012, at 5:00 PM, Florian Bösch <pyalot@gmail.com> wrote:

> I'm interested in drawing tablets and I wonder how that might appear in browsers.
> 
> Typically drawing tablets have these properties:
> 
> - PenID: The current pen ID being used
> - Tool type: the classification of the pen
> - Proximity: in range of the magnet-resonance sensors
> - Distance: distance over the surface
> - X Position: absolute position from the left
> - Y Position: absolute position from the top
> - Z rotation: rotation of the pen around its axis (roll)
> - Pressure: when the pen contacts the tablet surface, amount of pressure excerted
> - Tilt X: the tilting of the pen relative to the X axis of the tablet
> - Tilt Y: the tilting of the pen relative to the Y axis of the tablet
> - Wheel: the wheel on the pen mouse
> - Throttle: the throttle lever on airbrush pens
> - Pen buttons (stylus, stylus2)
> - Tablet buttons (left, middle, right)
> - Touch: touch sensitive slide bars on the tablet
> 
> The tablets do sport fairly good resolutions of 5080 LPI in the case of Wacom Intuous tablets which translates to a precision of +- 0.02mm. If mapped to a full HD monitors height of 1080 pixels it would correspond to more than 5 steps inbetween each pixel.
> 
> It's therefore of paramount importance to be able to setup a desired transform (in whatever fashion) when entering drawing mode rather than mapping and clamping a pen to its mouse emulated cursor position (for application of this principle please try out photoshop and related products that support tablets).
> 
> Another aspect that might be troublesome is that drivers for these devices typically deliver correlated events separately (such as X/Y axes events) which would be unusable to an application that way (it would result in drawing stairs). It's therefore important to correlate some individual events before passing them on to the application.
> 
> More modern tablets do also support multiple simultaneous pens and some also have multitouch support.
> 
> Is there any specification that would be suitable to serve these devices?
> 
> 
Received on Friday, 3 August 2012 06:09:42 GMT

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