%% Spiral Galaxy Formation Simulation with Embedded MATLAB Function block
% 
% This model was inspired by the classic paper "Galactic Bridges and Tails" 
% (Toomre & Toomre 1972).  Two disc shape galaxies are setup to almost collide. Once 
% the galaxies are close enough, mutual gravitational forces give the two spiral arm effect. 
% 
% Standard Newtonian dynamics are applied at each time step. We approximate the massive 
% cloud of stars with a single black hole at the center of the galaxy. We also partition the 
% stars into heavy and light bodies and skip the computation between light and light 
% bodies to improve performance.
% 
% The green blocks initialize the simulation, the orange blocks are the core of the 
% simulation, and the yellow block is used to make the galaxy animation view.
% 
% Except for the "PlotAll" visualization block's use of plotting routines, all of the 
% Embedded MATLAB function blocks in this model support code generation with 
% Real-Time Workshop and Real-Time Workshop Embedded Coder.
% 
%   Demo Requirements 
% 
% During this demonstration, Simulink generates code for the simulation in a Simulink 
% project directory created in the current working directory (pwd). If you do not want 
% to affect the current directory (or if you cannot) generate files in this directory, you 
% should change your working directory.
% 

open_system('sldemo_eml_galaxy')
sim('sldemo_eml_galaxy')