Ralph Kern schrieb: > Virginia Holmstrom schrieb: >> This may be a newbie question, but why is there no double type in the >> definition of array (pasted below)? How does one create geometry specified >> with doubles if Geometry::setVertexArray can not accept doubles? >> > > The OpenGL API (and quite all of the modern graphics hardware) does not > support double precision coordinates on vertex data. So it is of no use > to store double values if they just get downsized on the API side. > > For large scale precision geometry, make use of transformations (which > work in double precision, of course). > > regards Ralph >
correction: the OpenGL API has provisions for double vertex data (at least before OpenGL 3, see http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=229374 ). But as hardware doesn't support it, it is downsized by the drivers. regards Ralph _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
