File:Rotating line sections.gif
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Size of this preview: 600 × 600 pixels. Other resolutions: 240 × 240 pixels | 480 × 480 pixels | 700 × 700 pixels.
Original file (700 × 700 pixels, file size: 3.85 MB, MIME type: image/gif, looped, 100 frames, 3.0 s)
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Summary
[edit]DescriptionRotating line sections.gif |
English: Rotating line sections. All section have the same length of π and the same speed. The inner most circle has a diameter of 1. The second of diameter 2 has two sections. The third of diameter 3 has three sections. And so on. |
Date | |
Source | Own work |
Author | Jahobr |
GIF development InfoField | |
Source code InfoField | MATLAB codefunction rotating_line_sections()
% source code for drawing a GIF
%
% 2017-09-16 Jahobr
[pathstr,fname] = fileparts(which(mfilename)); % save files under the same name and at file location
figHandle = figure(15674455);
clf
axesHandle = axes;
hold(axesHandle,'on')
set(figHandle, 'Units','pixel');
set(figHandle, 'position',[1 1 700 700]); % big start image for antialiasing later [x y width hight]
set(axesHandle,'position',[-0.06 -0.06 1.12 1.12]); % stretch axis bigger as figure, easy way to get rid of ticks [x y width height]
set(figHandle,'GraphicsSmoothing','on') % requires at least version 2014b
axis equal; drawnow;
nRings = 30;
% % % variants
% offset = zeros(1,30);
% offset = rand(1,30)*pi;
% offset = ones(1,30)*0.5;
offset = linspace(0,2,nRings);
% offset = log(linspace(1,7,30));
% offset = linspace(0,1,30).^2;
xlim([-35 35]); % default
ylim([-35 35]); % default
nFrames = 100;
angleP = -linspace(0,pi*2,nFrames+1); % define gear position in frames
angleP = angleP(1:end-1); % remove last frame, it would be double
for iFrame = 1:nFrames
cla(axesHandle) % fresh frame
for iRings = 1:nRings
ang = linspace(0,pi*2,iRings+1); % define gear position in frames
for iSection = 1:iRings
wedge = linspace(0,pi/iRings,22); % define gear position in frames
[X,Y] = pol2cart(wedge +offset(iRings)+angleP(iFrame)/iRings + ang(iSection),iRings*ones(1,22));
plot(X,Y,'k-','linewidth',7)
end
end
%% save animation
drawnow
% pause(0.01)
f = getframe(figHandle);
if iFrame == 1 % create colormap
map = gray(8); % create own color map %
im = rgb2ind(f.cdata,map,'nodither'); %
im(1,1,1,nFrames) = 0; % allocate
else
imtemp = rgb2ind(f.cdata,map,'nodither');
im(:,:,1,iFrame) = imtemp;
end
end
imwrite(im,map,fullfile(pathstr, [fname '.gif']),'DelayTime',1/30,'LoopCount',inf) % save gif
disp([fname '.gif has ' num2str(numel(im)/10^6 ,4) ' Megapixels']) % Category:Animated GIF files exceeding the 50 MP limit
|
Licensing
[edit]I, the copyright holder of this work, hereby publish it under the following license:
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 20:59, 16 September 2017 | 700 × 700 (3.85 MB) | Jahobr (talk | contribs) | User created page with UploadWizard |
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