Programming Mana Cost 3

My previous pseudocode looks correct but there were a still a few errors I had to fix. First, you have to internally reverse the mana cost because otherwise the colorless part will “eat” the colored mana the rest of the cost needs. For example, 2WW needs to be reversed to WW2. So when you add mana, the white mana part is checked first. In other words, when you pay W toward the cost 2WW the result should be 2W not 1WW. And when you display the cost to the user, the output has to be reversed again.

Below I will example how to use my Python code that handles mana costs. Some examples of valid mana costs are
2
1 W
X U
GW
RB RB
2/G 2/G 2/G

Each part is separated with a space, which just makes it easier to split up. GW means you can pay G or W and 2/G means that you can pay either 2 or G. The class ManaCost is the class that you will be using. ManaCost is low level and a graphical component is supposed to use ManaCost and allow the user to select the appropriate land or mana. The graphical component would also tap the land if the mana was needed. An example of how to use ManaCost is given below.

c = ManaCost()
c.setManaCost(“2 W W”)
c.isNeeded(“W”) #true
c.addMana(“W”)
print c.toString() #2 W
c.addMana(“W”)
c.addMana(“U”)
c.addMana(“U”)
print c.isPaid() #true

Feel free to use this in your own projects. This has been tested thoroughly comes with a wide variety of test cases: TestManaCost and TestManaPart.

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