Hi Mike,
I changed the code in my loop to:
analog->update();
for (int i = 0; i < analog->getNumChannels(); i++) {
std::cout << analog->getValue(i) << " ";
}
std::cout << std::endl;
And now it works great!
Thanks again,
Julian.
Mike Weiblen wrote:
Hi Julian,
analog->getNumChannels() returns the size of the last actual received packet of
Analog data, not the potential channel capacity of an Analog device; see
osgVRPN/Analog.h.
The example below queries getNumChannels() immediately after device creation but
before any packet handing; after data has been received from the device, the
numchannels will be non-zero.
hth
-- mew
Julian Looser wrote:
Hi Amin,
Thanks for your reply. It seems our posts have crossed over and you've
replied to my initial message. What you've described is exactly what
I've done so far. I began with an AnalogFly entry in the vrpn.cfg file,
but I removed it because I just want the raw values from the joystick at
the moment, I don't need them mapped onto a tracker.
I get correct results with the vrpn_print_devices program. Could you
tell me whether these analog values were correctly working for you with
osgVRPN? This is where I am currently stuck: VRPN can see the analog
values but I don't get them through osgVRPN's Analog class.
Thanks again,
Julian.
Amin Ghadersohi wrote:
Quoted from http://www.cs.unc.edu/Research/vrpn/DirectInput.html:
"Before using a DirectInput joystick, you need to download the
DirectInput
SDK from www.microsoft.com/directx. Install it in the recommended
directory
(C:\DXSDK).
Once the SDK is installed, edit the vrpn_Configure.h. file and
uncomment the
definition for using direct input. Then rebuild the vrpn_server
application.
Now you can instantiate the joystick. Note that you can use the
joystick as
a tracker by adding an AnalogFly that listens to its values."
I have done this and analog channels work just fine.
Here is my vrpn.cfg file. A good way to test it, after you place the new
vrpn_server application that you compiled, is to run the
RUN_vrpn_server.bat
file and then modify RUN_vrpn_print_devices.bat to
vrpn_print_devices [EMAIL PROTECTED]
And run it.
Here is what the output of vrpn_server should be:
vrpn_server -millisleep 1 -f vrpn.cfg
Reading from config file vrpn.cfg
Opening vrpn_DirectXFFJoystick: Joystick0, read rate 60, force rate 0
Opening vrpn_Tracker_AnalogFly: Tracker0 with update rate 60
And here is what the output of the vrpn_print_devices should be:
[snip]
Hope this helps
Amin
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Mike Weiblen
Sent: Tuesday, October 03, 2006 11:47 PM
To: osg users
Subject: Re: [osg-users] osgVRPN with a joystick
Hi Julian,
I have not used the DirectXFFJoystick device, does it publish Analog
or Dial
channels? The osgVRPN prebuilt libs use VRPN 06.06 (I think), is that
device supported in that version?
Have you tried snooping the device traffic with the
vrpn_print_devices.exe
included w/ osgVRPN?
I have successfully used Analog channels with a Spaceball, so they do
work
on the client side.
Cheers
-- mew
Julian Looser wrote:
Hi,
I am trying to get values from a joystick into my OSG application
using VRPN via osgVRPN. I have set my joystick inside the vrpn.cfg file
like so:
vrpn_DirectXFFJoystick Joystick0 60 0
In my application I use osgVRPN::Button and osgVRPN::Analog to access
the buttons and axes of the joystick. Button state information is
coming through fine, but the analog object says there are no analog
channels when there should be seven.
Has anyone successfully used these classes with a joystick under
windows before? I had a look at the VRPN internals where it uses
DirectX to enumerate the joystick buttons and axes and it should be
picking them up. All buttons and axes are working in the Windows control
panel.
Any thoughts?
Thanks in advance,
Julian.
Here is the code for the incredibly simple test application:
int main( int argc, char *argv[] )
{
osgProducer::Viewer viewer;
viewer.setUpViewer( osgProducer::Viewer::STANDARD_SETTINGS );
const char* deviceName( "[EMAIL PROTECTED]" );
osgVRPN::Button* button = new osgVRPN::Button(deviceName);
osgVRPN::Analog* analog = new osgVRPN::Analog(deviceName);
std::cout << "Analogs: " << analog->getNumChannels(); // always 0!
osg::Group* root = new osg::Group();
viewer.setSceneData( root);
viewer.realize();
while( !viewer.done() )
{
viewer.sync();
viewer.update();
button->update();
std::cout << button->getButtonState(0) << " ";
std::cout << button->getButtonState(1) << " ";
std::cout << button->getButtonState(2) << " ";
std::cout << std::endl;
viewer.frame();
}
viewer.sync();
return 0;
}
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