FMSLogo Code

Finish fixing Bug #494; ELLIPSEARC2 now leaves at the point where the ellipse stopped.

This updates ELILPSEARC to account for the fix to ELLIPSEARC that makes it correctly honor the angle.

Partial fix for Bug #494 (ELLIPSEARC2 problems), as submitted by Francesco Simone Carta.

This would have been a complete fix in FMSLogo 7.7.0, but I have since changed ELLIPSEARC to calculate the angle of the sweep correctly, which made it so, in this implementation, the turtle either glides ahead or behind the drawn arc (but remains on the ellipse, which is still an improvement).

This also brings in a breaking change for when the third parameter is negative. The old ELLIPSEARC drew the arc on the opposite side of where the turtle is located. The new implementation draws the ELLIPSEARC sweeping in the opposite direction. The new behavior is more intuitive.

Fix Bug #533; ELLIPSEARC and ELLIPSEARC2 now treat the angles correctly.

The problem was that the "t" in the equation (x,y) = (a cos(t), b sin(t)) is not the angle of the ellipse, but the angle of a circle that is then squashed/elongated into an ellipse. To account for this, some math is now done to translate the given angle into the "t".

This fix may change the behavior of programs which give angles that aren't multiples of 90 degrees.

Add some regression tests for ELLIPSEARC, adapted from the ELLIPSEARC2 tests.

Update the message about why -flto cannot be used.
The latest mingw doesn't crash when given -flto, but I cannot make it work with wxWidgets.

Cleanup: Remove untranslated COPYDEF instructions from the Italian startup script.
All but one of these were commented out and so obviously did nothing.
The one that wasn't commented out redefined a NOREFRESH to itself, vacuous in itself, but also because NOREFRESH is a no-op in FMSLogo.

The primary motivation for this change is to remove warnings emitted by make-translation-tables.pl.

Cleanup: remove [copydef "px "pi] from Italian startup script.
This throws an error because px is a primitive.
It's also unnecessary since PX and PI are both already synonyms for PENREVERSE in the Italian FMSLogo.

Remove the OUTOFMEMORY tests that might fail (because of no overflow) on Windows.
This removes false-postive failures from the test pass.

Remove the commented out COPYDEF commands which translate a procedure name to itself.

I had asked Daniel Ajoy to add these so that they could be used to build translation tables which were added to the appendix of the English manual that was bundled with the Spanish FMSLogo. Since then, a complete Spanish translation of the manual has been added, complete with index, which made the translation table redundant. The translation tables are no longer included in the Spanish manual.

The primary motivation for removing these is to remove some warning generated by make-translations-table.pl.

Remove vacuous translations from the German startup script.
The German startup script translated FILTER as FILTER and TRANSFER as TRANSFER.
In addition to being in English, the translations do nothing, so including them in the startup script has no purpose and could lead to confusion.