Log of /trunk/pg/macros/Parser.pl

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Revision 2666 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Sun Aug 22 00:56:32 2004 UTC (8 years, 9 months ago) by dpvc
File length: 5306 byte(s)
Diff to previous 2644

Formulas can now be compared even if their variables are complex
numbers, or even points or vectors!  This makes it possible to ask
students for complex functions like z^2+i and so on.

You can specify limits for variables either via
Context()->variables->set(x=>{limits=>[0,1]})  (for reals) or
Context()->variables->set(z=>{limits=>[[-2,2],[0,1]]}) (for complexes).
Similarly for points and vectors (where the number of sub arrays
depends on the dimension).  You can also give the limits for a
specific formula by assigning to its ->{limits} field:

    $f = Formula("sqrt(x-10)");
    $f->{limits} = [10,12];

There are now named variable types for 'Point2D', 'Point3D',
'Vector2D' and 'Vector3D', in addition to 'Real' and 'Complex'.
You can also specify a variable type by giving an explicit instance of
a value of the given type.  E.g.

    Context()->variables->add(x=>'Real',y=>0);     # two real variables
    Context()->variables->add(z=>'Complex',w=>i);  # two complexes
    Context()->variables->add(r=>Vector(0,0,0));   # a vector in R^3
    Context()->variables->add(X=>'Vector3D');      # a vector in R^3

There still needs to be more error checking in processing
user-supplied limits, but I'm not sure how much overhead is worth it.

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Revision 2644 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Thu Aug 19 12:01:12 2004 UTC (8 years, 9 months ago) by dpvc
File length: 5307 byte(s)
Diff to previous 2602

Make sure loadMacros() doesn't try to load these files more than once.

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Revision 2602 - (view) (download) (as text) (annotate) - [select for diffs]
Modified Fri Aug 13 22:57:27 2004 UTC (8 years, 9 months ago) by dpvc
File length: 5248 byte(s)
Diff to previous 2576

Changed the way the parser checks to see if it is loaded.

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Revision 2576 - (view) (download) (as text) (annotate) - [select for diffs]
Added Wed Aug 4 20:52:28 2004 UTC (8 years, 9 months ago) by dpvc
File length: 4715 byte(s)

Make Parser work with PGauxiliaryFunctions.pl, and add the macro files
needed to initialize the parser.