Interrupting spells

[nilbog]

There are a few scenarios which should or should not interrupt spells.

-while casting a spell, ducking should not interrupt until the end of the cast

-while casting a spell, moving should not interrupt until the end of the cast

-while casting a spell, jumping should not interrupt until the end of the cast

-while casting a spell, being stunned should interrupt the cast. (bashed, stunned by spell, etc)

-while casting a spell, if you move from your original location, arrive at the same x/y/z location you began your cast while not ducked, it should still resolve.

-while casting a spell, it should be possible to sit. If you are standing at the end of the cast, and at the same x/y/z coordinates you began the cast, it should resolve.

What works and what doesn't? I'm not interested in reading opinions of how they should work, only what does or doesn't so it can be fixed.