Skylark wrote: > Hi David, > > Well in fact yes... Zoom, in "camera-speak", is making the FOV of the > camera smaller/larger. What the normal manipulators do to zoom is to > move the camera itself, i.e. dolly in/out in "camera-speak". You may > have seen the "dolly in zoom out" effect in movies, where the camera > dollies in while doing a zoom out with the lens at the same time, and I > use that expression to help me remember the difference between the two. > > http://en.wikipedia.org/wiki/Dolly_zoom > > http://en.wikipedia.org/wiki/File:Contra-zoom_aka_dolly_zoom_animation.gif >
Well, you’re right there! Forgive me J-S for briefly forgetting my Cinematography 101 on my last post! I guess what I was referring to was that the behavior was not the same as what I got in Perspective using the TerrainManipulator. I had to deal with the Ortho view area manualy and well as the mouse zoom. And yes I do realize the facts of the behavior of ortho projection. In fact that is why I'm using it in this case - to get a map-like view on a 3D world! I was just hoping (agenst hope) that someone had dealt with this before I - since there are some planview's out there that i heard of that was done in OSG! I guess I'll just have to come up with something to get the mouse to work somewhat the same way it works in Perspective mode! The worse case, I will have to look on how it was done manualy in the old Performer code I have and translate it to a Manipulator some how! Thanks! ----------- D Glenn ------------------------ D Glenn (a.k.a David Glenn) - Moving Heaven and Earth! ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=35306#35306 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
