Add initial prototype.

3-mid/opengl/source/lean/io/opengl-io-lat_long_radius.ads

@@ -0,0 +1,11 @@
+package openGL.IO.lat_long_Radius
+--
+--  Provides a function to convert a model file containing longitude, latitude
+--  and radius triplets (one triplet per line) to an openGL IO model.
+--
+is
+
+   function to_Model (model_File : in     String)              return IO.Model;
+   function to_Model (math_Model : access Geometry_3d.a_Model) return IO.Model;
+
+end openGL.IO.lat_long_Radius;