I'm having issues figuring out how to handle tile flipping (byte 2 of sprite OAM memory).
Consider if the bit is set to flip a sprite horizontally and its an 8x8 tile at 0,0 that looks like this (for simplicity):
Code:
a 0 0 0 0 0 0 b
e 0 0 0 0 0 0 f
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
c 0 0 0 0 0 0 d
Would a horizontal flip result in this? My rationale is that it flips in the middle, on a "horizon" as the pivot point.
Code:
c 0 0 0 0 0 0 d
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
e 0 0 0 0 0 0 f
a 0 0 0 0 0 0 b
For a vertical flip, same idea:
(Original)
Code:
a 0 0 0 0 0 0 b
e 0 0 0 0 0 0 f
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
c 0 0 0 0 0 0 d
(Vertical flip bit set)
Code:
b 0 0 0 0 0 0 a
f 0 0 0 0 0 0 e
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
d 0 0 0 0 0 0 c
Does any of this look right? Its rendering terribly in my emulator so I'm guessing I'm not interpreting this correctly.
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