[osg-users] [Fwd: Re: to draw landscapes beginning from a matrix]

[Robert Osfield]

On Thu, Feb 28, 2008 at 2:14 PM, aurora restivo <aurora_re at tiscali.it> wrote:
>  I am using Locator however I don't want my terrain to be drawn using the
>
>      locator->setCoordinateSystemType(osgTerrain::Locator::GEOCENTRIC)
>
>  I have tried to apply "GEOGRAPHIC" but it doesn't visualize anything.
>  I would perhaps need a Cartesian Locator for the correct visualization of
> my terrain.

There are three options for locating the data into the world,

   GEOCENTRIC - use lat/longs and then project onto an elliposoid
   GEOGRAPHIC - use lat/longs but in flat earth
   PROJECTED - use flat earth projection such as UTM etc.

The locator takes the non dimensional coordinats of the source data
layers (0,0 to 1,1) into the above cooordinate frame.

Robert.