User Function Argument Registration ucarg (C)

Using Tools > Working with User Code > User Function Interface Reference (C) > User Function Argument Registration ucarg (C)

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User Function Argument Registration ucarg (C)

Each argument of a C user function which has been initially registered with ucfunc is requested with a call in uclib to ucarg:

ucarg(void *func, char *type, char *variable, int size);

func: a pointer to the user function.

type: a character string giving the type of the argument, either of the following:

"Cell" for a cell field

"Face" for a face field

variable: a character string naming the requested argument, which must be a valid STAR-CCM+ variable.

size: the storage in bytes required for one element of the variable array. This is used to ensure that the precision of the user function matches the precision of STAR-CCM+. Examples are:

sizeof(Real) if variable is a Real scalar per element

sizeof(CoordReal[3]) if variable is a CoordReal vector per element

sizeof(int[2]) if variable is a pair of integers per element

The Real and CoordReal types define the precision of floating-point variables in Real.h.

Calls to ucarg must be made in the order the arguments are required by the user function.

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