Re: [osg-users] osg Coordinate system

[Vinoth Rajendran]

Hi,

... 

Thank You

Thank you!

Cheers,
Vinoth

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Re: [osg-users] osg Coordinate system

[Trajce Nikolov NICK]

Hi,

Here you can find some snippets:
https://github.com/CCSI-CSSI/MuseOpenIG/blob/master/Plugin-CIGI/IGPluginCIGI.cpp

but you rotate it normaly as in flat earth and then apply the
transofrmation for that geo location:

osg::Matrixd l2w;
osg::EllipsoidModel em;
em.computeLocalToWorldTransformFromLatLongHeight(osg::DegreesToRadians(lat),osg::DegreesToRadians(lon),alt,l2w);

osg::Quat hpr;
osg::Matrixd finalMatrix = osg::Matrixd::rotate(hpr) * l2w;

On Sat, Apr 29, 2017 at 7:03 AM, Vinoth Rajendran <
vinothrajendran4...@gmail.com> wrote:

> Hi,
>
> ...
>
> yaa,Now i am getting the Up Vector.But i unable to rotate correctly my
> object(entity) in scene with respect to Particular Axis.
>
>   if it is not geocentric(flat),if i want change the heading i can make
> rotate with respect to Z-axis,same pitch w.r.to X-Axis and Roll w.r.to
> Y-Axis.
>
>   But in geocentric how i can change heading,Pitch and Roll of my
> Entity ?
> Can anyone explain me please ?
>
> Thank you!
>
> Cheers,
> Vinoth
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=70861#70861
>
>
>
>
>
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Re: [osg-users] osg Coordinate system

[Vinoth Rajendran]

Hi,

... 

yaa,Now i am getting the Up Vector.But i unable to rotate correctly my 
object(entity) in scene with respect to Particular Axis.

  if it is not geocentric(flat),if i want change the heading i can make rotate 
with respect to Z-axis,same pitch w.r.to X-Axis and Roll w.r.to Y-Axis.

  But in geocentric how i can change heading,Pitch and Roll of my Entity ?
Can anyone explain me please ?

Thank you!

Cheers,
Vinoth

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Re: [osg-users] osg Coordinate system

[Trajce Nikolov NICK]

Hi Vinoth,

have a look at the osg::EllipsoidModel in osg/CoordinateSystemNode .. It
has all the methods to get the up vectors for specific lat/lon

On Fri, Apr 28, 2017 at 2:50 PM, shayne.tueller 
wrote:

> If you change to geocentric coordinates, the "up" vector is the normal to
> the spheriod at the XYZ location. I'm not sure what you mean by the Y
> coordinate.
>
>
> Sent via the Samsung Galaxy S7 active, an AT 4G LTE smartphone
>
>  Original message 
> From: Vinoth Rajendran 
> Date: 4/28/17 5:54 AM (GMT-07:00)
> To: osg-users@lists.openscenegraph.org
> Subject: [osg-users] osg Coordinate system
>
> Hi,
>
> ...
>
> i am using osg3.5.1 in my application.when i am running in flat terrain
> mode, Z axis is Up Vector in my Scene .if i am changing to Geocentric
> Mode,the Up Vector is Changing to Y axis.
>
> So how i can Change Up Vector in my Scene ?
>
> Thank you!
>
> Cheers,
> Vinoth
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=70853#70853
>
>
>
>
>
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>


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Re: [osg-users] osg Coordinate system

[shayne.tueller]

If you change to geocentric coordinates, the "up" vector is the normal to the 
spheriod at the XYZ location. I'm not sure what you mean by the Y coordinate.

Sent via the Samsung Galaxy S7 active, an AT 4G LTE smartphone
 Original message From: Vinoth Rajendran 
 Date: 4/28/17  5:54 AM  (GMT-07:00) To: 
osg-users@lists.openscenegraph.org Subject: [osg-users] osg Coordinate system 
Hi,

... 

i am using osg3.5.1 in my application.when i am running in flat terrain mode, Z 
axis is Up Vector in my Scene .if i am changing to Geocentric Mode,the Up 
Vector is Changing to Y axis. 

 So how i can Change Up Vector in my Scene ?

Thank you!

Cheers,
Vinoth

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http://forum.openscenegraph.org/viewtopic.php?p=70853#70853





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Re: [osg-users] osg coordinate system

[Robert Osfield]

Hi Peterakos,

The bulk of the OSG loaders assume that world coordinates have +ve Z
upwards, +ve Y north and +ve X to the east.

The majority Camera Manipulators assume the world has Z up as well,
then set up Camera's view matrix so the Z up aligns with vertical
access of the screen, +ve Y into screen and +ve X to right.

You can change the default viewing position in the camera manipulators
if you wish by use the setHomePosition(..) method, or avoid the use of
Camera manipulators and just set the viewer's Camera's view matrix
directly using any of the Camera::setUpView*() method.

Robert.

On 28 December 2012 20:06, Peterakos hay...@gmail.com wrote:
 Hello.

 Osg uses a coordinate system in which the +y axis goes into the screen
 and +z axis goes up.
 Does this default matrix affects the model matrix of each object on
 the scene or the view matrix of all the cameras ?
 I wish i could remove this behavior.

 thnx.
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