TerraModeler User Guide

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Navigation: Programming Interface > MDL Public Functions

Calling Method

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Calling Method

The functions can be called with mdlCExpression_ getValue(). The code example below illustrates the method:

void Example( void)

{

char Expr[120] ;

char Name[32] ;

int Ret ;

if (TmCall( &Ret, "FnSurfaceCount()") > 0)

mdlOutput_printf( MSG_PROMPT, “%d surfaces”, Ret) ;

sprintf( Expr, "FnSurfaceName(%ld,%d)", (long) Name, 0) ;

if (TmCall( &Ret, Expr) > 0)

if (Ret)

mdlOutput_printf( MSG_MESSAGE, “Name is %s”, Name) ;

}

/*-------------------------------------------------------------------

Call a function in TerraModeler. Store return value in *Ret.

Return 1 if successful.

Return 0 if TMODEL not found.

Return -1 if failed for another reason.

int TmCall( int *Ret, const char *Expr)

{

CExprValue Val ;

CExprResult Res ;

int Ok ;

if (!LoadApp( "TMODEL")) return (0) ;

Ok = mdlCExpression_getValue( &Val, &Res, Expr, VISIBILITY_CALCULATOR);

if (Ok != SUCCESS) return (-1) ;

if (Ret)

*Ret = (int) Val.val.valLong ;

return (1) ;

}

/*-------------------------------------------------------------------

Load MDL application with Name (such as “TMODEL”).

Return 1 if succssful.

Return 0 if application not found.

int LoadApp( char *Name)

{

void *Ptr ;

int Ok ;

/* Is application already loaded? */

Ptr = mdlSystem_findMdlDesc( Name) ;

if (Ptr) return (1) ;

/* Not loaded, attempt loading */

Ok = mdlSystem_loadMdlProgram( Name, NULL, "") ;

if (Ok == SUCCESS) return (1) ;

return (0) ;

}

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TerraModeler User Guide