trilinear Function

public function trilinear(phic, x) result(phi)

trilinear interpolation

Arguments

Type	Intent	Optional	Attributes		Name
real(kind=real64),	intent(in)			::	phic(2,2,2)	the value of phi at the corner of cubic box of side 1
real(kind=real64),	intent(in)			::	x(3)	location inside the cube (0<=x<=1) or outside x<0 x>1

Return Value real(kind=real64)

interpolated phi