partywhe.blogg.se - Apsim source code

In some cases though it is necessary to discover elements of a simulation as it is running and to then communicate directly with specific components. In a lot of cases, the static approach above provides sufficient functionality. To retrieve a list of APSIM variables and events, use the “Variables” and “Events” components under the “Output file” in the simulation tree in the APSIM User Interface. See the description of APSIM types below. Events must be declared using one of the APSIM types. The name of the event (NegativeBank in this example) will be the name of the event that APSIM sees. Other components in APSIM will be able to subscribe to this event. NET event should be published to the whole APSIM simulation. The name of the method (minus the On prefix) denotes the APSIM event name that will be trapped. The convention is that all handlers will have an On prefix.

The tag signals to APSIM that the following method is an event handler that needs to be called whenever the APSIM event is published.

The REPORT module writes the units to the output file. This tag can be used in conjunction with the Output tag.

The tag identifies a writable property that can be set from another module.

Like parameters, an alias can be specified for the output e.g.

The tag denotes a variable that APSIM can supply to other APSIM models when requested.

For example, Param(“NitrogenCost”) double NCost tells APSIM to look for a parameter called “NitrogenCost” rather than “NCost”. An alias can also be specified for the parameter. This error can be prevented by specifying the Param as optional with a true parameter e.g. If APSIM cannot find the specified parameter, then it will throw a fatal error. When the code is part of a script component, the parameter values will be on the “Properties” tab. APSIM looks for parameters in the XML configuration for this model. Like the Input tag, APSIM will supply a value but only at the beginning of the simulation.

The tag denotes that the variable is a parameter.

This error can be prevented by specifying the Input as optional with a true parameter e.g. If APSIM cannot find the specified variable, then it will throw a fatal error. In the example, APSIM will locate a variable called Fertiliser in another model and retrieve its value. The tag denotes that a value for this variable needs to be supplied by APSIM.This will help ensure that APSIM is able to locate your class.ĪPSIM relies heavily on reflection tags to analyse the model source code to locate variables and methods. Secondly, ensure that your class is not inside a namespace. Firstly, make sure your class is declared as public. Two things to note when creating your models. It subtracts the cost of fertiliser and irrigation water from this bank balance and adds in income based on simulated yield and grain protein. The above example calculates a simple gross margin based on a bank balance.