Re: [Plib-users] Multithreading in FG

[Hemalatha S. <hem...@re...>]

 =A0=0AHi,=0AYes U are correct!=0AThere are 3 separate physical displays ea=
ch with it's own program and each receiving network input from one system(e=
ach system has to process and render independently)=0A=0Ayes "send a done s=
ignal" mean that the left and right programs send a=0Anetwork message to th=
e center system( we are using here a flag=3D0/1 concept)=0A=0AThe main prob=
lem if they are not synced is -All three views keep updating in different r=
ates which is not good to visualize)=0ABy synchronization i mean all three =
views should update at same rate=0A[ie when u are rolling imagine how cente=
r ,left ,right view will look updating at diff rate] =0A=0ARegards,=0AHemal=
atha=0A=0AOn Wed, 30 Aug 2006 Stuart McDonald wrote :=0A>Hi,=0A>=0A>    Som=
e more information would be helpful. You say 3 projector screens=0A>and 3 s=
ystems; is that=0A>3 separate physical displays each with it's own program =
and each=0A>receiving network input?=0A>Does "send a done signal" mean that=
 the left and right programs send a=0A>network message to=0A>the center sys=
tem? If you don't sync them what problems does this cause?=0A>i.e. if each =
program=0A>were running at 60fps would anyone notice if they weren't sync'e=
d?=0A>=0A>Or if it's not 3 separate programs are you saying that data can c=
ome in=0A>(say speed) and=0A>associated data (say direction) can arrive lat=
er and you don't want to=0A>display out of sync=0A>information? If so then =
hat's an input problem, not rendering.=0A>=0A>--Stuart.=0A>We are trying to=
 project three views(center,left,right) on to three=0A>projector screens.Ai=
rcraft data(lat,lon,alt etc) is sent to these three=0A>systems from one sys=
tem through ethernet.=0A>=0A>We need to synchronize all the three views.=0A=
>=0A>We have tried one of the mechanism to synchronize.......=0A>=0A>Before=
 swapping buffers, the left and right systems send done signal to=0A>the ce=
nter system.Once the center system recieves done signal from both=0A>the sy=
stems, it sends release signal to both the system saying that it=0A>can swa=
p the buffers.=0A>By doing this there was some improvement seen but with so=
me delay.=0A>=0A>=0A