Leaks in the wall

[Galbraith]

Maybe it is related with speed of fb. Jarulf say that speed for fb is:

Speed: 16 + 2·slvl (max 50)

So for every slvl speed will be like in table:

Code:

                          Nova
                          Flame Wave
                          Elemental
              Holy Bolt   Bone Spirit  Lightning
     Fireball Firebolt    Blood Star   Chain Lightning Charged bolt
slvl speed    speed       speed        speed           speed        
1    18       18          16           32              8
2    20       20          16           32              8
3    22       22          16           32              8
4    24       24          16           32              8
5    26       26          16           32              8
6    28       28          16           32              8
7    30       30          16           32              8
8    32       32          16           32              8
9    34       34          16           32              8
10   36       36          16           32              8
11   38       38          16           32              8
12   40       40          16           32              8
13   42       42          16           32              8
14   44       44          16           32              8
15   46       46          16           32              8
16   48       48          16           32              8
17   50       50          16           32              8
18   50       52          16           32              8
19   50       54          16           32              8
20   50       56          16           32              8

Is it work in the same way for 18, 19 and 20 slvl?
Why is it not working with 17slvl Holy Bolt and Firebolt?
Someone know?

Also Jarulf say that:
Locations a missile travel per second: 25·speed/45.3

For speed 50 in straight line it is ~1,38 tile per frame (20 frames per second)

For non straight directions Diablo is using true trigonometry and as Jarulf said "For the purpose of keeping track of missiles, the game actually uses 22 extra bits of precision for its location, think of it as each location actually being divided in roughly 92 680 times 92 680 smaller locations. "

It shall give some less than 1 tile per frame speed shooting in "5 tiles straight and 2 left" direction for first tile near caster (wall). (Please calculate it if you want. You can draw line from caster tile to target tile on some squares on paper and see that part of that line going through first tile shall be shorter than length of side for that square (tile)).

Also note that caster is staying near wall. How it will work when we put a monster instead of wall? Will it be hit or not?

I have no idea am I right or not. I still have not enough data how spells "really" move and check to hit (wall or other objects) to analyze problem. Please discuss that here.