Don't fetch lots of axes state information for rendering if object is not visible. * gl-render.cc (opengl_renderer::draw_axes_planes): Check axes color and visibility and return immediately from function if there is nothing to do. * gl-render.cc (opengl_renderer::draw_axes_boxes): Check axes visibility and return immediately from function if there is nothing to do. * gl-render.cc (opengl_renderer::draw_axes_x_grid, drax_axes_y_grid, draw_axes_z_grid): Check axes state and visibility before bothering to fetch any more state data. * gl-render.cc (miscellaneous): Clean up comments. Change lines to wrap at < 80 chars. * graphics.cc (axes::properties::update_axes_layout): Use std::swap instead of intermediate temporary variable for clearer coding style.

Octave works best with gnuplot 4.4 or higher, which is available from
http://www.gnuplot.info.

In versions prior to 4.2.6 it is not possible to use the mouse to zoom in
on plots.  This is a limitation of earlier versions of gnuplot, which are
unable to zoom when the data it plots is not stored in a file. 


John W. Eaton
jwe@octave.org

Last updated: Tue Jan  4 18:55:56 PST 2011