MATLAB Answers

Animation improvement

1 view (last 30 days)
I have written a code to create an animation: satellite movement around the Earth. When I run it, it works fine. However, when it is modified to be part of a code much more complex present in a Matlab GUI, the results produced changes (mainly because of the bigger number of points to plot). I also have noticed that if I use the OpenGL renderer the movement of the satellite is quicker than when the other renderers (Painters and Zbuffer) are used. I do not know if there are further possibilities to achieve an improvement in the rendering of the satellite movement. I think the key is, perhaps, changing the code that creates the actual position of the satellite ( handles.psat ) and its trajectory along the time ( handles.tray )
handles.tray = zeros(1,Fin);
handles.psat = line('parent',ah4,'XData',Y(1,1), 'YData',Y(1,2),...
'ZData',Y(1,3),'Marker','o', 'MarkerSize',10,'MarkerFaceColor','b');
while (k<Fin)
az = az + 0.01745329252;
handles.tray(k) = line([Y(k-1,1) Y(k,1)],[Y(k-1,2) Y(k,2)],...
[Y(k-1,3) Y(k,3)],...
k = k + 1;
if (state == 1)
state = 0;

Accepted Answer

Walter Roberson
Walter Roberson on 25 Dec 2011
It might be faster to code the transform yourself as a matrix multiplication rather than calling makehgtform. The array is fairly simple:
( cos q sin q 0 0)
Rz (q) = (-sin q cos q 0 0)
( 0 0 1 0)
( 0 0 0 1)
Only two trig calls needed.
Julián Francisco
Julián Francisco on 26 Dec 2011
@Walter Roberson: Thank you back. Excuse me for my lazy ignorance. I have just found the rotate function also can be used to rotate the sphere.

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by