Hey all, I'm trying to draw a simple sphere (yes, I know there's a drawable type available) to learn how to build up simple geometry, by specifying vertices, normals, texture coordinates and indices. I eventually want to create a function that will give me vertices for spheroids that aren't perfect spheres, but follow the same principles.
I've been doing okay so far, and used a spherical coordinate transform to get cartesian coordinates. I have vertices, normals, texture coordinates and indices. * The issue I've run into involves where my 2D texture wraps around and meets itself on the sphere: http://i.imgur.com/ftVH2.png Like shown in the picture, there's a visible seam there. There are also shadows where multiple identical vertices are present at the poles. I'd like to know how to get rid of the seam and shadows! I am manually mapping the texture using the simplest 2d texture->sphere, shown here: http://paulbourke.net/texture_colour/texturemap/texture.gif If I use the bare minimum vertices (no duplicates) to define the sphere then the seaming and shadows disappear but I'm unable have the 2D texture wrap all the way around, and see extreme warping at the poles (which makes sense): http://i.stack.imgur.com/l9baA.png Regards, Preet _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
