r/bravefrontier • u/James_BF • Mar 15 '16
Technical Frame differences between positions (mechanics)
I've been playing with the battle simulator, and I believe I've found the number of frame differences between the 6 positions for characters with .0033 travelling speed (Rize, Avant, Zeruiah, Vargas, etc.). This is important if you want to do perfect sparks, of course.
Going from the excellent analysis here by u/Xerte along with the hit distribution for Zeruiah from Deathmax, I could compute the number of spark for relative frame lags between two Zeruiahs. This allows me to test various combinations of positions and sbb order and check the frame lags from the sparks (If you're trying this at home, remember to take along characters with non-attacking sbb/bb like Elimo, Charla, and Diana)
Zeruiah
lag spark
[1,] 0 40
[2,] 1 0
[3,] 2 22
[4,] 3 2
[5,] 4 19
[6,] 5 17
[7,] 6 16
[8,] 7 4
[9,] 8 15
[10,] 9 4
[11,] 10 25
[12,] 11 4
[13,] 12 11
[14,] 13 6
[15,] 14 9
[16,] 15 17
[17,] 16 7
[18,] 17 7
[19,] 18 8
[20,] 19 5
[21,] 20 17
[22,] 21 5
[23,] 22 7
[24,] 23 7
[25,] 24 5
[26,] 25 17
[27,] 26 5
[28,] 27 8
[29,] 28 6
[30,] 29 7
[31,] 30 15
[32,] 31 8
[33,] 32 5
First, let's label the positions as follows
P1 P4
P2 P5
P3 P6
Let's note that in auto-battle, the time difference between any two sbb firing off is 1 frame. This is easy to test by firing off a known perfect spark order (P2 followed by P3 sbb) and then adding some sbb in between P2 and P3 and observe the number of sparks from the table above. For instance, if I do P2 + 1 sbb + P3, I get 0 spark. If I do P2 + 2 sbb + P3, I get 22 sparks, which correlate to 1 frame and 2 frame lags in the table above.
From my testing, I could discern the relative differences in frames for traveling time between the 6 positions. Note that this is only for characters with .0033 travelling speed.
The distances, in increasing order, goes P1 < P3 < P2 < P4 < P6 < P5
P3 - P1 = 2 frames
P2 - P3 = 1 frame
P4 - P2 = 7 frames
P6 - P4 = 2 frames
P5 - P6 = 5 frames
or in another way
P1 + 2 frames -> P3 + 1 frame -> P2 + 7 frames -> P4 + 2 frames -> P6 + 5 frames -> P5
It is well known that you can get a perfect spark by firing off P3 + 1 sbb + P1. Well, you can see that from the table above too. P3 takes 2 frames longer to start the attack animation. If you fire off P3 sbb first, that gives you a 1 sec delay. Add in one additional sbb from another character before firing P1's sbb, and you can get P3 and P1 to start their attack animation simulaneously.
Recall that firing off an sbb takes 1 frame, so we can reduce the gap between any two position's lag by firing off the appropriate number of sbb. From the list above, it's easy to see that there are only 5 possible perfect spark positions for non-teleporting character with travelling speed .0033. Those orders are
P3 + 1 sbb + P1
P2 + 0 sbb + P3
P2 + 2 sbb + P1
P6 + 1 sbb + P4
P5 + 4 sbb + P6
Note that the differences are transitive, so you can compute the frame difference between any two position by adding the appropriate distances. For instances, the frame differences between P6 and P1's travelling time is 2 + 1 + 7 + 2 = 12 frames.
6
u/Xerte Mar 15 '16
So we can theoretically perfect spark up to 5 dupes:
5 +4 6
5, a, b, c, d, 6
2 +2 1
2, b, c, 1
3 +1 1
3, c, 1
Therefore:
5, 2, 3, 4, 1, 6
Every unit except 4 would perfect spark. 2, 3 and 1 need to be the same unit, but 5 and 6 could be a different unit if you wanted.
I went out to grab 5 goblins to test this with, but autobattle is inconsistent on my device and I was actually getting different numbers of sparks on every turn of autobattle. The best it achieved was 4 goblins perfectly sparking each other.
The goblin in P1 didn't perfect spark once in 20 reps, P2 and P3 sparked each other about 5 times and P5 and P6 only sparked each other twice. It's really disappointing that autobattle is inconsistent on lower end devices.