3DLDF 1.1.5

In release 1.1.5, I've tied up some loose ends. I wanted to do this before starting on the input routine.

• Added const real step argument to the version of Ellipse::intersection_points() that takes an Ellipse argument. See Ellipse Reference; Intersections.
• It is now possible to "typedef" real to either float or double. This means that real can now be made a synonym for either float or double by using a typedef declaration. real is typedeffed to float by default.
• Added const bool ldf_real_float and extern const bool ldf_real_double for use in non-conditionally compiled code. They are set according to the values of LDF_REAL_FLOAT and LDF_REAL_DOUBLE.
• Transform::epsilon() and Point::epsilon() now return different values, depending on the values of the preprocessor macros LDF_REAL_FLOAT and LDF_REAL_DOUBLE. I have not yet tested whether good values are returned when real is double.
• MAX_REAL and MAX_REAL_SQRT are no longer constants. Their values are set at the beginning of main(). However, users should not change their values. MAX_REAL is the second-largest float or double on a given machine. This now works for all common architectures.
• Added namespace System containing the following functions: get_endianness(), is_big_endian(), is_little_endian(), get_register_width(), is_32_bit(), is_64_bit(), and the template function get_second_largest().

  namespace System and its functions are documented in system.texi, which is new in edition 1.1.5.1.

• Replaced the various create_new_<type>() functions with the template function create_new(). The latter is documented in creatnew.texi, which is new in edition 1.1.5.1.
• Added the file 3DLDF-1.1.5.1/CWEB/cnepspng.el to the distribution. It contains the definitions of the Emacs-Lisp functions convert-eps and convert-eps-loop. See Running 3DLDF; Converting EPS Files; Emacs-Lisp Functions.
• Added the files 3DLDF-1.1.5.1/CWEB/exampman.web and 3DLDF-1.1.5.1/CWEB/examples.mp to the distribution. They contain the C++ and MetaPost code, respectively, for generating the illustrations in this manual.