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Raspberry pi


 
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Martin Naylor
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PostPosted: Sat Apr 28, 2012 11:02 am    Post subject:
Raspberry pi
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Hi all,
No not the type you eat :)

http://www.raspberrypi.org/

I was just wondering if anyone has one of these yet and has had a go at
getting OSG to run on it.
It quite trim with only 256mb of ram, but I guess it must be similar to
IPhone etc...
It will support OpenGL ES 2.0, I do have one on order but they are like
'hens teeth' at the moment.
There are variants of Linux available for it already.


Here is the spec:
SoC Broadcom BCM2835 (CPU, GPU, DSP, and SDRAM)
CPU: 700 MHz ARM1176JZF-S core (ARM11 family)
GPU: Broadcom VideoCore IV, OpenGL ES 2.0, 1080p30 h.264/MPEG-4 AVC
high-profile decoder
Memory (SDRAM): 256 Megabytes (MiB)
Video outputs: Composite RCA, HDMI
Audio outputs: 3.5 mm jack, HDMI
Onboard storage: SD, MMC, SDIO card slot
10/100 Ethernet RJ45 onboard network
Storage via SD/ MMC/ SDIO card slot.


Cheers

Martin



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kcbale
User


Joined: 04 Mar 2011
Posts: 69

PostPosted: Sat Apr 28, 2012 11:13 am    Post subject:
Raspberry pi
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Nobody I know has been able to get hold of one let alone run anything on it yet!

K.

On 28 April 2012 12:08, Martin Naylor < (
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Quote:
Hi all,
No not the type you eat Smile

http://www.raspberrypi.org/

I was just wondering if anyone has one of these yet and has had a go at
getting OSG to run on it.
It quite trim with only 256mb of ram, but I guess it must be similar to
IPhone etc...
It will support OpenGL ES 2.0, I do have one on order but they are like
'hens teeth' at the moment.
There are variants of Linux available for it already.


Here is the spec:
SoC Broadcom BCM2835 (CPU, GPU, DSP, and SDRAM)
CPU: 700 MHz ARM1176JZF-S core (ARM11 family)
GPU: Broadcom VideoCore IV, OpenGL ES 2.0, 1080p30 h.264/MPEG-4 AVC
high-profile decoder
Memory (SDRAM): 256 Megabytes (MiB)
Video outputs: Composite RCA, HDMI
Audio outputs: 3.5 mm jack, HDMI
Onboard storage: SD, MMC, SDIO card slot
10/100 Ethernet RJ45 onboard network
Storage via SD/ MMC/ SDIO card slot.


Cheers

Martin

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robertosfield
OSG Project Lead


Joined: 18 Mar 2009
Posts: 12353

PostPosted: Mon Apr 30, 2012 9:27 am    Post subject:
Raspberry pi
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Hi Martin,

I've been watching the development of Raspberry pi and I'm very
curious about getting the OSG up and running on it. I'm also more
generally curious about getting a full linux install running so that
my family can use it as their computer for browsing the web/playing
flash games. Such a small, cheap and low power package is the future
of home computing, so frustrating to have to wait soo long for it
finally happen...

As a side note, I've just got a new HTC One S and the snapdragon S4
processor in it is just plain awesome, dual core 1.5GHz and lower
power consumption. It's easily capable of being a desktop replacement
part, fingers crossed the next rev of Raspberry pi will harbour a bit
more memory and such a powerful little processor.

On the OSG side, the OpenGL ES 2.0 does still mean that we need to
writing custom shaders right now, something we need to address through
this year.

Robert.


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Bruno
Newbie


Joined: 16 Sep 2010
Posts: 7

PostPosted: Mon May 13, 2013 4:01 pm    Post subject:
About the Raspberry PI
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Hi,

I haven't found anything recent about making OpenSceneGraph work on a Raspberry Pi.

This example (nothing to do with OSG) works quite well, without X11 : https://bitbucket.org/benedek/rpi-simple-paramplot/overview

Anyone tried something (maybe not) similar with OSG on a Pi ?

Would be very nice to have our favorite scene graph working on this great little thing Wink

Cheers,

Bruno
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Alberto Luaces
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PostPosted: Mon May 13, 2013 4:38 pm    Post subject:
Raspberry pi
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Hi Bruno,

"Bruno Ronzani" writes:

Quote:
This example (nothing to do with OSG) works quite well, without X11 :
https://bitbucket.org/benedek/rpi-simple-paramplot/overview

I wonder if one can still rely on X11 for input event handling or if it
is required to be done without X as well.

--
Alberto



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Jeremy Moles
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PostPosted: Mon May 13, 2013 4:44 pm    Post subject:
Raspberry pi
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Take a look at this little project I started:

http://osgrpi.googlecode.com

I'm not done polishing things up (and I don't even use X11 at all here),
but those kinds of things could be resolved with the right time/money. :)

I would imagine that for most people want to use the RPi and OSG, X wont
actually be "desired." They'll like have some other embedded form of
input (like a 9DOF mems device, a Kinect, etc.), but who knows. There
are lots of paths for adding more traditional OSG support...

1) Write a new osgViewer::GraphicsWindow object. This would be good for
the short-term, but would be hardly better than the EmbeddedViewer code.

2) Write (or wait for someone to write) a proper DRI driver for X for
the Broadcom/VideoCore device. This would let us just the standard X11
GraphicsWindow, without caring one way or another.

On 05/13/2013 12:01 PM, Bruno Ronzani wrote:
Quote:
Hi,

I haven't found anything recent about making OpenSceneGraph work on a Raspberry Pi.

This example (nothing to do with OSG) works quite well, without X11 : https://bitbucket.org/benedek/rpi-simple-paramplot/overview

Anyone tried something (maybe not) similar with OSG on a Pi ?

Would be very nice to have our favorite scene graph working on this great little thing ;)

Cheers,

Bruno

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Michael Weiblen
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PostPosted: Mon May 13, 2013 4:58 pm    Post subject:
Raspberry pi
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Hi Jeremy,
cool stuff.
hear hear, it would be great to avoid X entirely on RPi.  
Doing embedded image generators using pre-RPi embedded linux PCs, X didn't offer any upside, and cost memory and reliability.

cheers
-- mew




On Mon, May 13, 2013 at 10:49 AM, Jeremy Moles < (
Only registered users can see emails on this board!
Get registred or enter the forums!
)> wrote:
Quote:
Take a look at this little project I started:

http://osgrpi.googlecode.com

I'm not done polishing things up (and I don't even use X11 at all here), but those kinds of things could be resolved with the right time/money. Smile

I would imagine that for most people want to use the RPi and OSG, X wont actually be "desired." They'll like have some other embedded form of input (like a 9DOF mems device, a Kinect, etc.), but who knows. There are lots of paths for adding more traditional OSG support...

1) Write a new osgViewer::GraphicsWindow object. This would be good for the short-term, but would be hardly better than the EmbeddedViewer code.

2) Write (or wait for someone to write) a proper DRI driver for X for the Broadcom/VideoCore device. This would let us just the standard X11 GraphicsWindow, without caring one way or another.

On 05/13/2013 12:01 PM, Bruno Ronzani wrote:
Quote:
Hi,

I haven't found anything recent about making OpenSceneGraph work on a Raspberry Pi.

This example (nothing to do with OSG) works quite well, without X11 : https://bitbucket.org/benedek/rpi-simple-paramplot/overview

Anyone tried something (maybe not) similar with OSG on a Pi ?

Would be very nice to have our favorite scene graph working on this great little thing Wink

Cheers,

Bruno

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http://forum.openscenegraph.org/viewtopic.php?p=54002#54002





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--
Mike Weiblen -- Black Hawk, Colorado USA -- http://mew.cx/

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Bruno
Newbie


Joined: 16 Sep 2010
Posts: 7

PostPosted: Tue May 14, 2013 8:47 am    Post subject:
Reply with quote

Hi Jeremy,

Very cool indeed ! Thank you for adding the pre-compiled OSG too Wink

I just needed a quick example to test everything out.

If I can show that OSG works fine - means at least 30fps, with image rendering, interactions and movements - on the PI, I will probably get the time and money to do the devs you are talking about Smile (it still seems to me very optimistic though)

On your example, there is no working input (keyboard, mouse), right ?

In the example I've posted in my last message, the guy was using the SDL to get them. Maybe I should do the same ?

Thanks again,

Bruno
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Jeremy Moles
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PostPosted: Tue May 14, 2013 2:02 pm    Post subject:
Raspberry pi
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On 05/14/2013 04:47 AM, Bruno Ronzani wrote:
Quote:
Hi Jeremy,

Very cool indeed ! Thank you for adding the pre-compiled OSG too ;)

I just needed a quick example to test everything out.

If I can show that OSG works fine - means at least 30fps, with image rendering, interactions and movements - on the PI, I will probably get the time and money to do the devs you are talking about Smile (it still seems to me very optimistic though)

On your example, there is no working input (keyboard, mouse), right ?

In the example I've posted in my last message, the guy was using the SDL to get them. Maybe I should do the same ?
In Linux, you use the kernel's evdev API (/usr/include/linux/input.h)
and read input_event structures one at a time from the appropriate
device node in /dev/input. Evdev is documented thoroughly on the web, so
a quick google search will reveal everything you need to know. The API
is simple and easy to use.

SDL may have some wrapper around it, but using the RPi it's very likely
you'll have some custom input device being developed with your final
product, so knowing how to use evdev directly (which is really just a
lunch-break research project) is useful.
Quote:
Thanks again,

Bruno

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