I have the following Matlab code, which is used for gif and avi animation creation;
Matlab imwrite is used to create frames of the gif; but I found lighting command is critical in order to successfully obtain the animated gif.
close all
clear all
clc; %
nFrames = 50;
% Preallocate movie structure.
mov(1:nFrames) = struct('cdata', [],'colormap', []);
% Create movie.
figure('color','white');
Z = peaks(150); surf(Z,Z,'edgecolor','none');
view(3);
axis vis3d tight equal off;
v = axis;
%
for k = 1:nFrames
clf;
surf(1.5*sin(2*pi*k/20)*Z,Z,'edgecolor','none');
axis(v);
axis off
camlight;
lighting phong
mov(k) = getframe;
[Inx,cmap]=rgb2ind(mov(k).cdata,256);
if k==1
imwrite(Inx,cmap,'testoutx.gif','gif','DelayTime',0.25,'LoopCount',Inf) %
else
imwrite(Inx,cmap,'testoutx.gif','gif','WriteMode','append','DelayTime',0.25) %
end
end
% Create AVI file.
movie2avi(mov, 'myPeaks.avi', 'compression', 'None');
When I comment "lighting phong", then the obtained gif is static, not animated. It seems only one of the frames is stored. I also tried to use drawnow before each getframe sentence, but that did not work. Why? How can I solve the problem without using lighting?
The desired gif (obtained from the code above):
The undesired gif with "lighting phong" commented:
