solve bug init plot user

MBsysC/mbs_common/mbs_realtime/realtime/realtime.c

@@ -641,6 +641,8 @@ Simu_realtime* init_simu_realtime(MbsData* mbs_data, Realtime_option *options, i
 
     realtime->buffer_size = options->buffer_size;
 
+    realtime->first_break = options->init_break;
+
     realtime->flag_plot = options->flag_plot;
     realtime->flag_visu = options->flag_visu;
 

MBsysC/mbs_common/mbs_realtime/realtime/realtime.h

@@ -143,6 +143,8 @@ typedef struct Simu_realtime
     int flag_plot; ///< 1 if SDL plots features activated, 0 otherwise
     int flag_visu; ///< 1 if Java visualization features activated, 0 otherwise
 
+    int first_break; ///< 1 if during the first break, 0 otherwise
+
     Realtime_constraint **constraints; ///< structures of multiple real-time constraints
 
     Realtime_extern *ext; ///< external variables

MBsysC/mbs_common/mbs_realtime/sdl/plot_sdl.c

@@ -1941,7 +1941,7 @@ void plot_screen_sdl(Simu_realtime *realtime, double tsim, int screen_flag)
     screen_sdl   = realtime_sdl->screen_sdl;
     auto_plot    = screen_sdl->auto_plot;
 
-    if (screen_flag==1)
+    if ((screen_flag == 1) && (!realtime->first_break))
     {
         update_y_tab(screen_sdl);
     }
@@ -2975,6 +2975,8 @@ void break_gestion(Simu_realtime *realtime, double tsim)
         }
     }
 
+    realtime->first_break = 0;
+
     // update variables after the break
     delta_break_u_sec = t_usec(init_t_sec, init_t_usec) - start_break_t_usec;
     realtime->speed_last_t_usec += delta_break_u_sec;