E.g. if player is facing East (1) and enemy facing South (2)
1-2 = -1
-1+4 = 3
Plot monster sprite 3. Repeat!
It was surprisingly easy to get the monsters in and animated, and facing the correct direction in relation to the player. Basically the player has one of 4 directions (0, 1, 2 and 3) and the monster has 1 of 4 directions (0, 1, 2 and 3) and you subtract the monsters direction from the players direction to give you which sprite to plot. If the result is less than 0 you add 4.
E.g. if player is facing East (1) and enemy facing South (2)
1-2 = -1
-1+4 = 3
Plot monster sprite 3. Repeat!
E.g. if player is facing East (1) and enemy facing South (2)
1-2 = -1
-1+4 = 3
Plot monster sprite 3. Repeat!
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Comments
sanch3x
(Md - Pd) % 4 if you want to avoid the extra check. 
May 11, 2011 08:48 PM
Looking good! Also, I believe Gazillion's optimization should be more like ((Pd - Md) + 4) % 4.
May 12, 2011 12:56 AM
May 12, 2011 06:23 PM
Sorry I mixed up the two parameters, I meant (Md - Pd) % 4 which will give you the same results as adding +4 to negative numbers and leave the positive ones unchanged.
[s]Player Monster Pd-Md%4 0 0 0 0 1 3 0 2 2 0 3 1 1 0 1 1 1 0 1 2 3 1 3 2 2 0 2 2 1 1 2 2 0 2 3 3 3 0 3 3 1 2 3 2 1 3 3 0[/s]
Looks like the editor doesn't like me pasting from excel, but the math is good (or am I really that tired?)[s]
[/s]
[s]Player Monster Pd-Md%4 0 0 0 0 1 3 0 2 2 0 3 1 1 0 1 1 1 0 1 2 3 1 3 2 2 0 2 2 1 1 2 2 0 2 3 3 3 0 3 3 1 2 3 2 1 3 3 0[/s]
Looks like the editor doesn't like me pasting from excel, but the math is good (or am I really that tired?
)[s][/s]
May 12, 2011 09:06 PM
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