When processing a model, we perform a bunch of optimizations but we avoid the most complex ones because often times it does not worth the effort. The entire turnaround time between modifying the circuit and having it compiled as a module in VCV Rack is around 1-2 mins, and this goes up to around 5-20 mins if I enable more in-depth simplifications, or even longer if I want, but there isn’t much gain after around 10 mins. This results in an executable program that can be called by the clients (Simulation Center and Mathematica) to perform simulations. When a user runs a simulation, we process the model and generate C++ code that is compiled and linked to our simulation engine. At the end, a combination of both is what gives all flexibility. Some users just need System Modeler and not Mathematica. If they prefer to create models graphically, System Modeler (Model Center + Simulation Center) is the best option. They can also perform simulations of this models and plot the results using the Wolfram Language. If users have Mathematica only, they can create SystemModeler models (Modelica) from equations. It allows you to create models from Wolfram Language equations, control simulations, perform more advanced analysis and retrieving equations, linearized models etc. Mathematica (Wolfram Language) can act as a scripting language for Modelica models. Simulation Center is the program to control the simulations, plot results and perform common analysis. The Modelica code stores all the information (equations, components, connections, graphics, simulation settings) what makes it a portable format that can be used in other Modelica tools. Those models are saved as Modelica models (textual format). Model Center is the program where you can create models graphically and textually. ![]() ![]() ![]() It includes the Modelica compiler and the routines to communicate with the clients shown on top. On the bottom you can see the “Kernel” which is a kind of language server.
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