My saved levels load fine during the same session but if I close Gamestudio and load the saved game again, Newton doesen't seem to remember that certain entities are physics objects.
Is there a way I can get Newton to write to my saved game file with this function? Can it be done by using NewtonBodySetTransform ? If so, how? Thanks

////////////////////////////////

function load_game()
{
saving_pan.visible = off;
main_panel.visible = off;
pause_panel.visible = off;
freeze_mode = 1;

loading_pan.visible = on;
loading_pan.pos_x = (screen_size.x / 2) - (bmap_Width(loadingmap) / 2);
loading_pan.pos_y = (screen_size.y / 2) - (bmap_Height(loadingmap) / 2);
pause_panel.visible = off;
if(game_load("21save",001)>0)
{
sleep (2);
loading_pan.visible = off;
purge_bmaps();
kill_music();
freeze_mode = 0;
mouse_mode = 0;
set_video_mode(vid_mode);
game_state = 1;
}
else
{
game_state = 0;
main_back();
loading_pan.visible = OFF;
ui_panel.visible = OFF;
}
}

with NewtonBodySetTransform you can reset the position of a newton entity. usually physics entities get moved by forces. sometimes it's helpful though if you can reset it to any position you want. you can't simply change entity.x/y/z then because the newton engine wouldn't know about that. so you have to use NewtonBodySetTransform.

for integrating newton with the load/save system of the engine i would cycle through the newton entities and save all important properties (velocity, mass,...) before destroying them. after loading you have to create them again and reset the saved properties.

Thanks Ventilator, so NewtonBodySetTransform is still necessary even if the positions are remembered during game load?