1. A method for visualizing functions of a system based on data from a simulation environment, comprising: importing a functional model of the system from the simulation environment, including a plurality of function nodes and a plurality of connections, each connection linking two of the function nodes; for each of the function nodes, creating a function configuration triple including a function description, a system component with which the function is associated, and at least one system variable with which the function is associated; for each of the connections, creating a connection configuration triple including a source function and a destination function selected from the function nodes, and a type of flow associated with the connection; generating a functional visualization file from the function configuration triples and the connection configuration triples; including in the functional visualization file, a subscription list of variables associated with each of the functions of the function configuration triples; subscribing to retrieve values for each of the system variables in the subscription list based on the function configuration triples from the simulation environment; and displaying a functional visualization based on the functional visualization file and the system variables.