Half of v

src/SPICE.jl

@@ -86,6 +86,4 @@ include("v.jl")
 include("w.jl")
 include("x.jl")
 
-
-
 end # module

src/n.jl

@@ -0,0 +1,27 @@
+export nvp2pl
+
+"""
+    nvp2pl(norm, point)
+
+Make a SPICE plane from a normal vector and a point.
+
+### Arguments ###
+
+- `norm`: A normal vector...
+- `point`: ...and a point defining a plane
+
+### Output ###
+
+Returns a struct representing the plane.
+
+### References ###
+
+- [NAIF Documentation](https://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/nvp2pl_c.html)
+"""
+function nvp2pl(norm, orig)
+    plane = Ref{Plane}(Plane())
+    ccall((:nvp2pl_c, libcspice), Cvoid,
+          (Ptr{SpiceDouble}, Ptr{SpiceDouble}, Ref{Plane}), norm, orig, plane)
+    handleerror()
+    plane[]
+end

src/types.jl

@@ -2,7 +2,8 @@ export
     Ellipse,
     center,
     semi_major,
-    semi_minor
+    semi_minor,
+    Plane
 
 mutable struct Ellipse
     center::NTuple{3, SpiceDouble}
@@ -20,4 +21,12 @@ end
 
 center(e::Ellipse) = collect(e.center)
 semi_major(e::Ellipse) = collect(e.semi_major)
-semi_minor(e::Ellipse) = collect(e.semi_minor)
+semi_minor(e::Ellipse) = collect(e.semi_minor)
+
+mutable struct Plane
+    normal::NTuple{3, SpiceDouble}
+    constant::SpiceDouble
+end
+
+Plane() = Plane((0.0, 0.0, 0.0), 0.0)
+