XScreenSaver(1) XScreenSaver(1) NNAAMMEE grav - draws a simple orbital simulation SSYYNNOOPPSSIISS ggrraavv [-display _h_o_s_t_:_d_i_s_p_l_a_y_._s_c_r_e_e_n] [-foreground _c_o_l_o_r] [-background _c_o_l_o_r] [-window] [-root] [-mono] [-install] [-visual _v_i_s_u_a_l] [-ncolors _i_n_t_e_g_e_r] [-delay _m_i_c_r_o_s_e_c_o_n_d_s] [-count _i_n_t_e_g_e_r] [-decay] [-no-decay] [-trail] [-no-trail] DDEESSCCRRIIPPTTIIOONN The _g_r_a_v program draws a simple orbital simulation OOPPTTIIOONNSS _g_r_a_v accepts the following options: --wwiinnddooww Draw on a newly-created window. This is the default. --rroooott Draw on the root window. --mmoonnoo If on a color display, pretend we're on a monochrome display. --iinnssttaallll Install a private colormap for the window. --vviissuuaall _v_i_s_u_a_l Specify which visual to use. Legal values are the name of a visual class, or the id number (decimal or hex) of a specific visual. --nnccoolloorrss _i_n_t_e_g_e_r How many colors should be used (if possible). Default 200. The colors are chosen randomly. --ccoouunntt _i_n_t_e_g_e_r Default 12. --ddeeccaayy --nnoo--eeccaayy Whether orbits should decay. --ttrraaiill --nnoo--ttrraaiill Whether the objects should leave trails behind them (makes it look vaguely like a cloud-chamber. EENNVVIIRROONNMMEENNTT DDIISSPPLLAAYY to get the default host and display number. X Version 11 10-May-97 1 XScreenSaver(1) XScreenSaver(1) XXEENNVVIIRROONNMMEENNTT to get the name of a resource file that overrides the global resources stored in the RESOURCE_MAN- AGER property. SSEEEE AALLSSOO XX(1), xxssccrreeeennssaavveerr(1), xxlloocckk(1) CCOOPPYYRRIIGGHHTT Copyright (C) 1993 by Greg Bowering. Permission to use, copy, modify, and distribute this soft- ware and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. AAUUTTHHOORR Greg Bowering , 1993. Ability to run standalone or with _x_s_c_r_e_e_n_s_a_v_e_r added by Jamie Zawinski , 10-May-97. X Version 11 10-May-97 2