Re: [osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Aaaah, that explains some of what I'm seeing. Hum... Using the TerrianManipulator is different from the trackball manipulator but the idea is the same: setByMatrix I have been assuming to capture the entire state of the manipulator and to properly situate my camera exactly where I want and at

Re: [osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Hi Allen, I have a terrain manipulator I hope to release soon (which is ill-defined for where I work). For inspiration you can also look at the earth manipulator in osgEarth. jp Allen Saucier wrote: Aaaah, that explains some of what I'm seeing. Hum... Using the TerrianManipulator is

Re: [osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Hi Allen, the problem with setMatrix is that it cannot fully encapsulate the state of the manipulator. Internally the manipulator (trackball) uses a distance, rotation and center, but all these variables do not fit into a matrix. The manipulator can calc a matrix from the internal variables,

Re: [osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Is your viewing camera also using the local coordinate system (i.e geocentric)? Guy -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=25621#25621 ___ osg-users mailing list

Re: [osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Hi, thanks JP! :) I really appreciate your response. It appears I am fighting something I didn't expect and something I don't fully understand: the terrain manipulator. I understand what you've proposed but when I call the fucntion: setByMatrix() w/in the terrain manipulator, that function

[osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Hi, I am having some extreme difficulty in rotating my viewing camera 90 degrees with respect to a local coordinate system. Local coordinate system: (in geocentric measure) mine is at the edge of the earth; i.e. i'm using a spherical earth. here is how I compute the local axes: fuctionName (

Re: [osg-users] Help: how to rotate view camera 90 degrees in relationship to terrain

Hi, I didn't try to follow your code, but here's and overview of how we do it: Have a camera/manipulator makeLookAt command that takes eye, center and up vectors. (These can be converted to the osg manipulators' distance, rotation, center). Have a transformation matrix from ECEF coords to