Start tracking delta time in milliseconds and passing it to the update

method of each subsystem.

diff --git a/src/Main/main.cxx b/src/Main/main.cxx
index 69d0a7822ba12079bf6729ae9fcd8d360348cc9e..f54bb64df30e1a5fc436c3555fef11d2645b62d0 100644 (file)
--- a/src/Main/main.cxx
+++ b/src/Main/main.cxx
@@ -394,6 +394,12 @@ void trRenderFrame( void ) {
 
 // Update all Visuals (redraws anything graphics related)
 void fgRenderFrame( void ) {
+  
+    static long old_elapsed_ms = 0;
+
+    int dt_ms = int(globals->get_elapsed_time_ms() - old_elapsed_ms);
+    old_elapsed_ms = globals->get_elapsed_time_ms();
+
     static const SGPropertyNode *longitude
        = fgGetNode("/position/longitude-deg");
     static const SGPropertyNode *latitude
@@ -596,7 +602,7 @@ void fgRenderFrame( void ) {
 
         ssgSetNearFar( scene_nearplane, scene_farplane );
 
-       current_model.update(0); // FIXME: use real delta time
+       current_model.update(dt_ms);
 
        // $$$ begin - added VS Renganthan 17 Oct 2K
        fgUpdateDCS();
@@ -725,21 +731,21 @@ void fgRenderFrame( void ) {
        // glDisable( GL_TEXTURE_2D );
 
        // update the input subsystem
-       current_input.update(1); // FIXME: use real dt
+       current_input.update(dt_ms);
 
        // update the controls subsystem
-       globals->get_controls()->update(1); // FIXME: use real dt
+       globals->get_controls()->update(dt_ms);
 
        hud_and_panel->apply();
        fgCockpitUpdate();
 
        // Use the hud_and_panel ssgSimpleState for rendering the ATC output
        // This only works properly if called before the panel call
-       globals->get_ATC_display()->update(1);  // FIXME: use real dt
+       globals->get_ATC_display()->update(dt_ms);
 
        // update the panel subsystem
        if ( current_panel != NULL ) {
-           current_panel->update(1); // FIXME: use real dt
+           current_panel->update(dt_ms);
        }
 
        // We can do translucent menus, so why not. :-)
@@ -750,7 +756,7 @@ void fgRenderFrame( void ) {
 
        // glEnable( GL_FOG );
 
-       globals->get_logger()->update(0); // FIXME: use real dt
+       globals->get_logger()->update(dt_ms);
     }
 
     glutSwapBuffers();