Here are some of the 3D models I have made, mostly in HeeksCAD as its quick and easy, for the camera track, ladder foot & lens cap I used FreeCAD for its extra features. You can rotate and zoom the models in the 3D view below.
If you find the models useful then please consider donating using the paypal button
This is a design I made of a negative holder for analogue camera film, I use it with my digital camera to scan negatives. You can see an example of how I use the negative holder here
This is a design I made for a compact asthma inhaler body. It should be adjusted since it doesn’t allow the canister to fit inside the body. Also the nozzle didn’t really work as the 3D printing wasn’t capable of such small holes. It probably needs a microdrill to finish.
This is some code for building a jquery ui horizontal menu. It is based on code by https://codepen.io/seungjaeryanlee/ and modified for icon support and to create a menu automatically from a JSON schema. It’s pretty useful for HTML5 app development.
This is how the menu would look be structured if just coded in html
This website contains the free online HTML5 puzzle games: MegaTangram (a tangram game), hexpac (a hexominos packing game), Enigmatic puzzle, befuddled and PegSolitare. They work great with any modern browser, However they are sometimes being worked on so may have temporary glitches or present new features from time to time.
The website is currently being migrated from a CMSMS website, the two CMS systems are quite different, I’m still working on implementing the functionality and some things may not work correctly.
Security of ejectamenta website using SSL and https
Now main user login, user home page and puzzle pages are secured by SSL/https system. Not all pages are using https however, so check when using the quick login fields by the menu bar if you want to be extra secure. Using https is needed for facebook apps so hopefully the puzzles will soon be available on Facebook as well.
New app that simulates an online drumkit: includes different drum loudness/sound types (ie bell sounds, open hihat), quality drumkit sampling and recording rhythms as a musical score.
The RhythmSticks app is a simulation of a 5 piece drum kit using quality sampled drum sounds. The sounds have 6 zones of loudness which are increased by hitting the drum near the center (or at the edge for the cymbals). The hihat has partially and fully open sounds and a foot splash or tap, The 24 inch ride cymbal has additional bell sounds. Cymbals are hihat, 18 & 16 inch crashes, 18 & 24 inch rides, 6 inch splash and a 22 inch china.
Click the metronome and time is started now when you play the drums the score reflects the drums hit and the rhythm played is recorded. To play your recorded score click again on the metronome, you can even add extra beats as it is is being replayed.
The mouse may not be the best device to play the drums with and by entering the menu (top left button) the keyboard keys can be mapped to the drums
The WebAudio API used for this app is pretty new technology so you will need a recent browser for the app to work, on a tablet you will probably need a recent model and the latest browser (ie. chrome beta).
I have made an online printable calendar web application. You can upload a different photo for each month and add custom events like birthdays to the months. The calendar you create from your images can be downloaded as a pdf file for home printing. It can also be installed from the Google Chrome store.
The calendar shows country specific holiday dates and is available (and translated) for the following countries:
United Nations Organisation |
* There maybe some errors in the translation – these are due to inconsistencies in the locale packages of PHP frameworks used.
Plotting irrational numbers (pi, e, sqrt2, golden ratio) as vectors allows their complexity to be visualised
I have always wanted to visualise irrational numbers. Our brains are capable of recognising patterns in nature and I wanted to know if these patterns could be visualised in irrational numbers, and whether beautiful patterns could be seen that could lead to an further understanding of the irrational nature of the numbers. Just found out after publishing this article that the idea has been round for a while! (here is an interesting blog article). Here I have extended the technique to 3 dimensions for better visualisation and give results and computer code.
In this experiment the fractional parts of the irrational numbers, pi, e, sqrt2 and golden ratio are transformed into vectors in cartesian space for visualisation purposes. Each digit of the number sequence (from left to right) is transformed into a spatial vector with unit length. The orientation is calculated from the number as: angle = (digit/10)*2*pi. Sine and cosine functions are used to derive a position in the cartesian plane relative to the position of the previous digit (see code below for more details). As the irrational number is described to greater precision its decimal place increases, this occurs on the number string from left to right. As we are traversing the number sequence this corresponds to increasing time steps of the number analysis. On the plots the sequence position of the digit (its decimal place) is colour coded using a heat mapping (blue->red on increasing significant digits). The 3D plots also gives the sequence position of the digit on the Z axis, this helps to separate overlapping sequences in cartesian space.
These plots are the results of the analysis, please click them for more detail
Here is a vector plot of 1 million random number generated numbers
Data and Matlab/Octave computer code
Below is the Matlab/Octave code used for generating the plots. Data can be downloaded here: pi, e, golden ratio, sqrt2 (data is without decimal point!)
% requires file name containing string of irrational number delete decimal point from string ie 3.14... -> 314... % read text file containing number
format = "%1c"
fileID = fopen('pi.txt','r');
p = fscanf(fileID, format);
% convert character string to matlab array
for i=1:length(p); _p(i) = str2double(strcat(p(i),".0")); end
% create arrays for plotting
x_array = zeros(1,length(_p));
y_array = zeros(1,length(_p));
% polar angle
for i=2:length(_p); x_array(i) = x_array(i-1)+cos((_p(i-1)/10.0)*2.0*pi); y_array(i) = y_array(i-1)+sin((_p(i-1)/10.0)*2.0*pi); end
% surface plot with z axis and colour blue->red as increased fractional part
h = surface([x_array(:), x_array(:)], [y_array(:), y_array(:)], [[1:length(_p)]', [1:length(_p)]'], [[1:length(_p)]', [1:length(_p)]'], 'EdgeColor','flat', 'FaceColor','none');