Output forces and moments for many input values like inputs of a RANS matrix.

In the GUI Commands Window, the method B(‘YourBlockState’).setValue() enables to put a given block of the model into the specified state, and Z(‘YourOutputChannel’) enables to evaluate a channel. For instance B(‘Boat.Leeway’).setValue(1) will impose a Leeway of 1, and Z(‘Boat.Aero.FM’).toFrame(Z(‘Boat.Frame’)).M[0] will evaluate the aero rolling moment in the boat frame of reference.The B(‘YourBlockState’).setValue() and Z(‘YourOutputChannel’) can easily be built into a loop, or more complex function, to do more complex analysis. For example, the following script is a template to show how to loop through all the rows of a hydro RANS CSV file to read the RANS inputs of each row, put the model in the corresponding state, evaluate and print the Gomboc hull hydrostatics forces and moments:

var lines = filelines(“YourPathToRANSFile.csv”)print(lines[0])for (var i = 1; i < lines.length; i++) {

row = lines[i].split(‘,’)

G.M.runWithAutoUpdateLocked(function() {

B(‘Boat.Optimisation.Speed’).setValue(row[0]);

B(‘Boat.Optimisation.Leeway’).setValue(row[2]);

B(‘Boat.Optimisation.Trim’).setValue(row[3]);

sinkvalue = parseFloat(row[1])+ (11.675-10.36)*sind(Z(‘Boat.Optimisation.Trim’));

B(‘Boat.Optimisation.PortFoilSink’).setValue(sinkvalue);

})

var fm = Z(‘Boat.Port.Hull.FMHydrostatics’);

print(i, fm.F, fm.M);

}

Note 1: B() is an access to the block itself (and you can see all the things you can do with it by query(B(‘YourBlockState’)) and Z(‘YourOutputChannel) is an access to an output channel.

Note 2: Using ` B(‘YourBlockState’).setValue(123)` always updates the model. When changing many states at once in a script, the many model updates can slow down things considerably. Using `runWithAutoUpdateLocked` like in the example above will prevent that (you pass a function that modifies the model and the model will be updated once when the function has executed).’,’Output chosen forces and moments for many different parameter values like the inputs of a RANS matrix.