Hi Kriangkrai, > > Also, floating point calculations are better done separately (there are C > > functions for that) > > Do you mean using FFI, i.e. calling C functions from Lisp? If so, how? > Could you give me an example for calling C's "double sin(double x)" in > <math.h>.
Please take a look in "src/ext.c". There is, for example, 'ext:Sin', that interfaces to scaled integers: : (ext:Sin 314159 100000) -> 0 : (ext:Cos 314159 100000) -> -100000 If you set '*Scl', you can make it a little more readable: : (setq *Scl 5) -> 5 : (ext:Cos 3.14159 1.0) -> -100000 : (ext:Sin 0.5 1.0) -> 47943 : (format (ext:Cos 3.14159 1.0) *Scl) -> "-1.00000" : (format (ext:Sin 0.5 1.0) *Scl) -> "0.47943" Cheers, - Alex -- UNSUBSCRIBE: mailto:[email protected]?subject=unsubscribe
