What about --overlay?
 

Zach


 


  _____  

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jason
Sent: Monday, April 23, 2007 12:03
To: osg users
Subject: Re: [osg-users] Advice on laying gridlines on a terrain


Hey Jason, 

The version of osganimate I have doesn't recognize the -overlay option. Is
there a more current version I should be running? Also, I removed the DECAL
line and the results were the same.

Thanks,
Jason


On 4/23/07, Jason Beverage <[EMAIL PROTECTED]> wrote: 

Hi Jason,

 

I'm not sure what the problem would be, try running "osganimate -overlay"
and see if it works for you.  If it does, then there shouldn't be a problem
with the code in osgspheresegment.  One thing I notice is that the code in
osgspheresegment sets the tex env mode to DECAL, but I don't think this
needs done as the OverlayNode does that for you already.  Try removing that
line and seeing if it works for you.

 

Thanks,

 

Jason

 


  _____  


From: [EMAIL PROTECTED] [mailto:
<mailto:[EMAIL PROTECTED]>
[EMAIL PROTECTED] On Behalf Of Jason
Sent: Monday, April 23, 2007 11:25 A
To: osg users
Subject: Re: [osg-users] Advice on laying gridlines on a terrain

 

Hi, 

 

I tried out this example. I got it compiled, and removed the #if so it would
force it to run using the createOverlay code. Forgive me if I am missing
something, but I don't see any grid lines being rendered on the terrain.
Does this particular example have a bug? I've tested this a few times and
can verify that the overlay code is running but I just don't see the grid
lines. 

 

Thanks,

Jason

 

On 4/20/07, Jason <[EMAIL PROTECTED]> wrote: 

Jason, 

 

This looks very promising. Thanks for the tip. 

 

Jason

 



On 4/20/07, Jason Beverage <  <mailto:[EMAIL PROTECTED]>
[EMAIL PROTECTED]> wrote: 



Hi Jason,

 

OverlayNode would definitely be of use to you here.  There used to be an
example of exactly what you are trying to do in the osgspheresegment
example, but it is no longer in there.  You can see it here though: 

http://www.openscenegraph.org/viewcvs/examples/osgspheresegment/osgsphereseg
ment.cpp?rev=1.18
<http://www.openscenegraph.org/viewcvs/examples/osgspheresegment/osgspherese
gment.cpp?rev=1.18&view=markup> &view=markup

 

Just do a search for createOverlay and you'll find it.

 

Good luck!

 

Jason

 

 


  _____  


From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jason
Sent: Friday, April 20, 2007 10:36 A
To: [email protected]
Subject: [osg-users] Advice on laying gridlines on a terrain

 

Hi, 

 

I'm currently developing an application that loads in either an FLT or a TXP
terrain. I'm interested in laying down grid lines where the spacing can be
changed by the user. Maybe I'm overthinking this, but I'm looking for a way
to basically lay the gridlines down directly on the 3 dimensional terrain.  

 

Is there something in OSG that allows someone to lay a texture upon another
texture or am I better off using shaders, or something else to achieve this
effect? 

 

I've checked out various examples...would OverlayNode or TexGenNode be of
any use to me?

 

Thanks,

Jason 

 

 





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