Optimizing drawnow for large real-time simulation
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Hi everyone. I am using this basic setup for a real-time simulation. The profiler states that most of the time (60%) is spent in drawnow. My geometries are made of ~6000 vertices ( v ) and ~14000 faces ( f ). I am currently reaching 15 frames per second (fps) and would like to target ~20 fps. I have tried replacing drawnow with pause() but it either gets too slow or it starts skipping frames. Do you have any suggestions?
- I have tried switching between renderers without any success and modifying e.g. 'XData' instead of 'vertices' results in improper rendering and is not recommended (see comment below).
dt=0.02;
hsurf=trisurf(f,v(:,1),v(:,2),v(:,3));
axis([-15 15 -15 15 -15 15]);
for t:1:T
v=function_to_update_vertices(v,dt);
set(hsurf,'vertices',v); %faces stays the same
drawnow
end
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Sean de Wolski
am 12 Apr. 2013
Bearbeitet: Sean de Wolski
am 12 Apr. 2013
Have you tried using all three renderers to see which is the fastest for this application? Or are you tied to OpenGL for transparency?
My only other suggestion might be to try setting the 'XData', 'YData', 'ZData' explicitly rather than the 'Vertices' which then have to calculate the above. I do not know if this will improve speed or not.
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