9 Responses

1. Jeroen Brosens

   08|Jul|2008 1

   Hi Koushik,
   Looks interesting, your Managed wrapper! Good work!
   About the vector data; does this 9.8 have anything to do with ‘g’ (gravitational acceleration, being 9.8 m/s^2) or am I totally wrong here?
   Next to that, I was browsing your code quickly but is there any chance that you can provide a non-ambiguous illustration of the coordinate system with the axes that you describe in relation to the device?

   Thanks in advance,
   – Jeroen

2. kdutta

   08|Jul|2008 2

   HTC actually reports their sensor data back in the 3 axis with values between approximately -1000 and 1000. However, to make this more API device independent and give the numbers real world meaning, I converted those values into meters/second^2. So yes, in a stand still state, the device would return a vector of length 9.8, which is the gravitational constant.

   I have also updated the blog post to further explain the coordinate system in relation to the device’s orientation.

   I would also encourage you to inspect the sample application. Also you could create one of your own that displays the vector values as you twist and turn the device. It’s difficult to explain it via words and diagrams, but it all makes perfect sense when you play with it.

3. Daniele

   09|Jul|2008 3

   Hi,

   i’ve tried to use your code and I receive an error when execute this row

   Dim htcGV As HTCGSensor = New HTCGSensor()

   the error is:

   InvalidProgramException

   Can you help me?

4. kdutta

   09|Jul|2008 4

   I updated the code to explictly pass the the HTC Sensor type as a uint. I doubt that was the problem though. It works fine on my phone still, obviously.
   Let me know if the change works for you. I also emailed you on the address you provided in your comment; feel free to email me back with the results of the new code.

5. Svein Skogen

   09|Jul|2008 5

   Wouldn’t it, using this sensor, be possible to add (albeit low-precision) inertia-navigation to augment the gps sensor?

   The reason I’m asking is this:

   GPS systems are infamous for their (lack of) capabilities in tunnels and garages. Using this three-axis-accelerometer, we should be able to detect speed changes, and to a certain amount turning, while we are missing the gps signals. If so, the gps functionality of this cellphone might suddenly rival the capabilities of many gps-units sold for car navigation today. And even better: It might give GPS-unit manufacturers a hint that such an “extra” chip may be a good idea to add to their gear.

   Regards,

   Svein Skogen

6. AJ

   17|Jul|2008 6

   I’m thinking of an app that shows a keyboard if you tilt the device backwards, hides it when tilted forward.
   The keyboard itself will be quite large but tilting left and right shows either the left or the right side.

7. kdutta

   18|Jul|2008 7

   That’s a pretty good idea, but I don’t know if you can programatically show the SIP (using SipShowIM) in a process outside of your own. That would be something to look into.

8. Un SDK per l’accelerometro del HTC Touch Diamond « P@ssioneMobile

   27|Jul|2008 8

   [...] si è adoperato per fare un reverse engineering dell’API presente HTCSensorSDK.dll. Enteprisemobile ha quindi realizzato un wrapper per la classe, esponendola e rendendola utilizzabile. Nel post è presente anche una guida [...]

9. wmpoweruser.com » Blog Archive » Sensory Overload - asteroids game for the HTC Diamond using G-sensor

   10|Aug|2008 9

   [...] version of the venerable Asteroids game utilizes the G-Sensor, Nav Sensor, and the 3D hardware capabilities of the the HTC Touch Diamond and looks simply [...]