Saturday, May 8, 2010

Implementing some cards

Okay, I think I've spent enough time on how abilities work in my problem, but it's definitely easier when viewing some real cards.

In reality, I haven't done much of the work yet that would make making cards interesting - no targeting, no damage, no destruction or sacrificing - it's essentially creating and spending mana right now.

Before I come to the interesting cards which can't be done yet, I'll show you what already works in this post. I have done a simple parser for cards. In fact, it's quite extensible and can be configured to plug-in different file formats. The only file format by now is a plain text format, for which in turn different line-parsers can be plugged in.

And now to the cards:

name    Forest
super   basic
type    land - forest

The basic land types have the mana producing ability implied, which are also parsed as any other mana ability. I'm not sure how this will work with adding and removing basic land types, but it's like that for now.

name    Graven Cairns
type    land
text    {T}: Add {1} to your mana pool.
text    {B/R}, {T}: Add {B}{B} to your mana pool.
text    {B/R}, {T}: Add {B}{R} to your mana pool.
text    {B/R}, {T}: Add {R}{R} to your mana pool.

Right now, there are only activated abilities. Costs and Effect are parsed separately, and every cost is parsed on its own. By now, any combination of mana costs and Tap or untap costs are working. The only Effect is "Add ... to your mana pool." Things like "{B}{B}, {B}{R} or {R}{R}" are not possible by now, neither are hybrid symbols (they only work for costs), so I write it as three abilities.

name    Dryad Arbor
color   green
type    land - forest
type    creature - dryad
pt      1/1
text    (Dryad Arbor isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G} to your mana pool.")
text    Dryad Arbor is green.

Here you can see that every type is specified on its own line only with its corresponding subtypes. The two "text" lines here are actually nonfunctional. The "Dryad Arbor is green." Ability is actually implemented by the "color" line, and the mana ability comes from the forest subtype.

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