Members
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GroupD8
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Implements Dihedral Group D_8, see group D4, D8 is the same but with diagonals
Used for texture rotations.Vector xX(i), xY(i) is U-axis of sprite with rotation i
Vector yY(i), yY(i) is V-axis of sprite with rotation i
Rotations: 0 grad (0), 90 grad (2), 180 grad (4), 270 grad (6)
Mirrors: vertical (8), main diagonal (10), horizontal (12), reverse diagonal (14)
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