udfGetEbcNormDir()
Return the outward normal direction of the surface at the surface quadrature point.
Syntax
normDir = udfGetEbcNormDir( udfHd ) ;
Type
AcuSolve User-Defined Example Boundary Condition
Parameters
- udfHd
- The opaque handle (pointer) which was passed to the user function.
Return Value
- normDir (Real*)
- Pointer to two dimensional real array of the outward normal direction of the surface at the surface quadrature point. The first (fastest) dimension of the array is the number of surfaces, nItems, and the second (slower) dimension is three, for the x, y and z directions.
Description
Real* normDir ;
Real x_dir, y_dir, z_dir ;
Integer surf ;
...
normDir = udfGetEbcNormDir( udfHd ) ;
for ( surf = 0 ; surf < nItems ; surf++ ) {
x_dir = normDir[0*nItems+surf] ;
y_dir = normDir[1*nItems+surf] ;
z_dir = normDir[2*nItems+surf] ;
...
}
Errors
- This routine expects a valid udfHd.
- This routine may only be called within an Element Boundary Condition user function.