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This beautiful web page was created in 2020. Now in 2021 I have a new link to share! A Snake game made in rust with macroquad and web assembly. The Controls are WASD. What did I learn while constructing this?

the rand crate does not work with Web assembly. macroquad::rand is an alternative for pseudo random number generation.
the std::time module does not work with web assembly... But how do I get UNIX Timestamps in u128 format then?
if you build with the --release flag for the wasm target: The resulting .wasm file is significantly smaller (2 MB vs 11 MB)

Now a second demo is added: A Snow Simulation!

A Vec<(usize, usize)> was used as the data structure to store the falling/moving snowfalkes. Is this the optimal choice for this? Frequent removal of random elements in the vector occur in this simulation.
when your redrawing the screen is conditioned with an if statement (maybe to set a hard limit on the fps, which is unimplemented in the macroquad lib for now) the screen starts to flicker!
The basic-http-server is a great tool to test your websites...
Format html with Ctrl+Shift+I in VsCode
Thought: Evaluate purpose fullfilling role of random number generator with such a snow simulation. (equal distirubtion of random numbers)

Now a TicTacToe Game exists too! Sadly this did not work for a long time after a breaking change occured. I did not make any changes to the wasm files, meaning the origin had to be a breaking change a)in the web-browser, b) in the javascript. I later found out the javascript is always updated to the newest version of macroquad. Thats why you should download the javascript and host it yourself to keep these working in stable condition or use a specific version from miniquad-samples like this. I updated the rust macroquad code to 0.3 (many changes occured since 0.2.*) and now hosting the up to date javascript myself so that breaking changes and more work can be avoided in the future.

Macroquad Wasm App	Date of creation	Link to source Code
Snow Simulation	10.02.2021	github gist;raw rs source file
TicTacToe	11.02.2021	github raw gits; raw rs source file
Elastic Collision Simulation	09.03.2021	raw rs source file
Rock Paper Cisors Cellular Automata	added 04.05.2021	github repo; raw rs file
DDA algorithm	added 05.05.2021	raw rs source file
Elementary cellular automata rules	added 03.05.2021	raw rs source file
Generate Qr-Codes from text	added 17.06.2021	raw rs source file
Minecraft like tile based lighting system but in 2D (right click to place torches, left click to place light blocking blocks.	added 06.08.2021	raw rs source file
Play the Chaos Game (apply multiple coordinate transformations with certain propabilities to get unique shapes)	added 11.01.2022	raw rs source.
Boid Experiments	08.04.2022	raw rs source file

Exploring 2D level generation with Evcxr Jupyter notebooks. The used algorithms only use integers in their calculations (u32, u64, i64), making them deterministic, as opposed to undeterministic if floats (f64, f32) where used. Deterministic behavior would be important in a multiplayer scenario, where the client and server can repeat the same calculations and simulations to verify each others results more quickly and without sending too much data between each other (the hashes of the results would be enough). The only thing to worry about when using integers are overflowing airthmetic operations(bitschifting <<, addition +, multiplication *, substraction (with unsigned integers worrysome) -)wich will result in panics. Introducing "smooth looking" behavior with whole number/integer divisions only is another problem.

Truchet patterns are generated by repeating a simple base tile (with a simple pattern, 2 lines two circles, ...) that are flipped randomly (horizontal flips). This results in interesting patterns.
Line Drawing. Given two 2D vectors (x1, y1) and (x2, y2) you want to find out wheter thesese are linearly dependent or not. It turns out there is a quite simple condition for doing that: 0 == x1*y2-x2*y1 (is this related to the cross product?). Only additions and multiplications are used to verify this condition, meaning all numbers x1, y1, x2 and y2 can be integers and not just floats. This idea was exploited to draw lines only using integers and generate patterns that look like vornoi diagrams. The same idea can be used to rasterize lines or draw triangles. bresenham algorithmis longer and more complicated imo(but it needs less multiplications, which where expensive in the past).
Exploring our integer "hash" function. To get a desired "pseudo random seed based" function and not rely on the (bloated and complicated to use imo) rand crate, a modified version of Jankins hash function was used. To get an overview over its "random number generation", based on linearly increasing seed i, some sample plots where created. The sample plots show some gaps, meaning its results are not that evenly distributed, which is not great, but ok for our application. All functions in the notebooks above where written in a way that make the seed based random number generation function swapable.

Articles

Title	Approximate Date of Creation	Short Content descriptor
5 cool html tags	August 2021	There are many cool HTML tags, that allow for cool functionality.
Integer circle algorithm	September 2021	I never thought the parametrization of this algorithm could be used to generate cool fractal images.
100 programming Questions/Tasks and example Answers.	23. September 2021	I just started it to practice my java skills, in the future I plan to add Python solutions.
Finding Prime + RSA	2022	I had a simple application example task: given the public key (n, e) = (7387, 1357) decrypt the intercepted message: (2133, 429, 1126). The letters of the original message where converted to numbers using the following sheme: (A, 11), (B, 12), (C, 13), ..., (Y, 35), (Z, 36) > Jupyter Lite Notebook (link only works on localhost....)
macroquad funny animations	29.01.2022	exploring inverse cinematics. Raw Source code file:
React Matrix Math Inversion GUI	20.22.2023	Experimenting with a library called React Datasheet grids and mathjs. source