fac879f8e6
[Reverse-engineering] [th05] Number display using the bold gaiji font
...
Many thanks to http://bytepointer.com/tasm/index.htm for providing a
better searchable resource for TASM's default `LEA imm16` → `MOV imm16`
optimization, which we initially had to hack around here.
Funded by -Tom-.
2019-03-06 19:32:38 +01:00
ba3a6f7158
[Reverse-engineering] [th05] Shared HUD gaiji row
...
Yup, yet another random not really needed global.
Funded by -Tom-.
2019-03-06 18:32:07 +01:00
058595b1d9
[Reverse-engineering] [th04/th05] Score variables
...
In which ZUN uses little-endian BCD as the exclusive internal storage
for both the current and the high score. Which are then updated using,
once again, ridiculously micro-optimized ASM code that uses the
venerable x86 BCD instructions.
Funded by -Tom-.
2019-03-04 21:42:11 +01:00
308d1bc785
[Reverse-engineering] [th04/th05] Boss explosions
...
So apparently, this way of distorting a circle into an ellipse (?) by
adding a value to the angle for one of the two coordinates isn't
actually widely known in math and doesn't have a name. Fair enough.
Funded by -Tom-.
2019-03-03 14:03:41 +01:00
1cb2c0acbc
[Reverse-engineering] [th03/th04/th05] Palette change flag
...
Funded by -Tom-.
2019-03-03 13:32:55 +01:00
6ed8e60334
[Reverse-engineering] [th04/th05] Boss phase timeout flag
...
Funded by -Tom-.
2019-03-01 23:20:52 +01:00
b02147b5c0
[Reverse-engineering] [th05] Yumeko's Phase 4/7 knife/laser intervals
...
Which are set in the regular stage init function for some reason,
which is why I have to cover them right now.
Funded by -Tom-.
2019-03-01 23:20:52 +01:00
ae9651c693
[Reverse-engineering] [th04/th05] Difficulty/character-based value selection
...
Funded by -Tom-.
2019-03-01 23:20:51 +01:00
c241af414f
[Reverse-engineering] Current difficulty
...
Funded by -Tom-.
2019-03-01 23:07:42 +01:00
17a05b1b71
[Reverse-engineering] [th05] Secondary boss position and sprite ID
...
Sure, I like me some global variables too. If you have to temporarily
replace them for a single function call though, it's pretty much the
textbook example of where *not* to use them.
Funded by -Tom-.
2019-03-01 23:07:41 +01:00
08ffcb0737
[Reverse-engineering] [th04/th05] Boss hitboxes
...
Funded by -Tom-.
2019-03-01 16:18:02 +01:00
062e775f41
[Reverse-engineering] [th04/th05] .BB file loading boilerplate
...
Yup, nothing interesting in here.
Except for maybe the confirmation that LS00.BB is used for the curved
bullets used by Shinki and EX-Alice?
Funded by -Tom-.
2019-03-01 16:17:52 +01:00
893bd46969
[Reverse-engineering] [th04/th05] Stage-specific invalidate/render functions
...
Used only sparingly, like for the starfield in TH05 Stage 2.
Funded by -Tom-.
2019-02-28 17:56:26 +01:00
5e9aaafb8b
[Reverse-engineering] [th05] Shot decay animation after a target is hit
...
Struct strHIT_CHARA_BULLET in uth05win. Yup, newly introduced in TH05.
Funded by -Tom-.
2019-02-28 17:43:15 +01:00
d9e9b38736
[Reverse-engineering] [th04/th05] Spark animation
...
Also seen when midbosses explode. Class CSparkEffect in uth05win.
Funded by -Tom-.
2019-02-28 17:43:15 +01:00
da284cacaf
[Reverse-engineering] [th02/th04/th05] Hardcoded spark sprites
...
As seen when killing stage enemies or grazing.
Funded by -Tom-.
2019-02-28 17:43:15 +01:00
2ea2e0ddf9
[Reverse-engineering] [th05] Player shot animation types
...
Funded by -Tom-.
2019-02-28 17:43:15 +01:00
b9f3d86e44
[Reverse-engineering] [th04/th05] Adding new player shots
...
Funded by -Tom-.
2019-02-28 17:43:14 +01:00
9a2c6f72ba
[Reverse-engineering] [th04/th05] Second, unused field of the .map header
...
Thanks to -Tom- for telling me what this obviously had to be.
2019-01-11 00:28:56 +01:00
deb45ea14e
[Reverse-engineering] [th04/th05] Player shot structure
...
And that's enough for now, see you in February!
Funded by -Tom-.
2019-01-01 02:29:12 +01:00
35f9bd71e8
[Reduction] [th04/th05] Micro-optimized version of super_roll_put_tiny()
...
Y'know, maybe ZUN measured and all of this actually mattered? What do I
know?
Funded by -Tom-.
2018-12-31 20:41:13 +01:00
e7265ac656
[Reverse-engineering] [th04/th05] Shot X/Y velocity lookup table
...
Funded by -Tom-.
2018-12-31 19:45:34 +01:00
4770d145d6
[Reverse-engineering] [th04/th05] Target position for homing shots
...
Funded by -Tom-.
2018-12-30 15:31:26 +01:00
612beb815b
[Maintenance] Clean up the confusion between "tiles" and .STD tile sections
...
Funded by -Tom-.
2018-12-30 02:30:16 +01:00
75763ccd32
[Reverse-engineering] [th04/th05] Invalidating background tiles around a point
...
…and *now* we can tackle all those entity types that were referencing
this function, with the help of uth05win.
Funded by -Tom-.
2018-12-30 00:19:18 +01:00
c2ef9d51b6
[Reverse-engineering] [th02/th03/th04/th05] Back/front page pairs
...
Because using just one variable would have totally been too
straightforward.
Funded by -Tom-.
2018-12-30 00:16:18 +01:00
35ef90f4d1
[Reduction] Page flipping
...
Funded by -Tom-.
2018-12-30 00:16:18 +01:00
c00b87ed4f
[Reverse-engineering] [th04/th05] Redrawing dirty stage background tiles
...
Funded by -Tom-.
2018-12-30 00:16:16 +01:00
bcc1b7518f
[Reverse-engineering] [th04/th05] Applying VRAM scrolling to Y coordinates
...
Funded by -Tom-.
2018-12-29 18:34:51 +01:00
dbf1e93a79
[Reverse-engineering] [th02] Current scrolling line
...
… and that's all that's superficially identical to TH04 and TH05. I lack
the funding to cover more. :P
Funded by -Tom-.
2018-12-29 18:34:51 +01:00
4fe4c8eed1
[Reverse-engineering] [th04/th05] Scrolling-related variables
...
Funded by -Tom-.
2018-12-29 18:34:51 +01:00
20d05c1653
[Reverse-engineering] [th04/th05] Rendering all stage background tiles at once
...
Funded by -Tom-.
2018-12-29 18:34:51 +01:00
6a6ce47c56
[Reduction] EGC-powered VRAM region copies
...
Funded by -Tom-.
2018-12-29 17:03:26 +01:00
e1e4f819ed
[Reverse-engineering] [th02/th04/th05] Stage background tile ring buffer
...
Funded by -Tom-.
2018-12-29 17:03:24 +01:00
8ee87233b8
[Reverse-engineering] [th02/th05] Player movement speed
...
Yes, both characters in TH04 have the same speed!
Funded by -Tom-.
2018-12-26 22:07:34 +01:00
261d5037ed
[Reverse-engineering] [th04/th05] .STD file loading
...
… because TH04's version of this takes the ASCII stage ID directly from
the resident structure.
So boss battles are simply triggered by setting the background tile
scroll speed to 0? That means…
Funded by zorg.
2018-12-26 17:59:03 +01:00
3f06c63206
[Reverse-engineering] [th03/th04/th05] Pointers to the resident structure
...
Quickly doing these despite not having RE'd the structures themselves
yet…
Funded by zorg.
2018-12-26 17:59:03 +01:00
6c555aad61
[Readme] Mention that stage portions in TH04/TH05 *are* handled by bytecode
...
Funded by zorg.
2018-12-26 17:59:03 +01:00
4a0b973c76
[Reverse-engineering] [th04/th05] Midboss-related function pointers
...
Funded by zorg.
2018-12-26 17:59:03 +01:00
25ee5990aa
[Reverse-engineering] [th04/th05] Boss battle backdrop rendering
...
Funded by zorg.
2018-12-26 17:59:03 +01:00
d211a22c9f
[Reverse-engineering] [th04/th05] GRCG-powered playfield row filling
...
Isn't it quite a bit risky to do that without a CLD in front?
Funded by zorg.
2018-12-26 17:59:01 +01:00
bc3c85f09a
[Reverse-engineering] [th04/th05] GRCG/EGC-powered VRAM writes
...
Funded by zorg.
2018-12-25 23:45:24 +01:00
41622254a8
[Reverse-engineering] EGC register writes
...
Funded by zorg.
2018-12-25 23:45:24 +01:00
b62a8b29a6
[Reverse-engineering] [th02/th04/th05] Boss-related function pointers
...
No idea what these other ones in TH02 are.
Funded by zorg.
2018-12-18 19:52:41 +01:00
0cde4b7cd3
[Reverse-engineering] [th05] Laser update and render functions
...
Funded by zorg.
2018-12-17 00:27:38 +01:00
8634e10b6d
[Reverse-engineering] [th04/th05] Bullet clear trigger and time
...
Funded by zorg.
2018-12-16 01:49:55 +01:00
4aeb035121
[Reverse-engineering] [th04/th05] A random shared draw coordinate
...
Local variables are so overrated.
Funded by zorg.
2018-12-16 00:31:05 +01:00
b3c5e4dcfe
[Reverse-engineering] [th05] Rendering and hit testing for a single laser
...
What the hell.
Funded by zorg.
2018-12-15 23:04:26 +01:00
9d79c1413c
[Reverse-engineering] [th05] Laser coordinate sub-structure
...
Yup, the draw function actually takes a sub-structure starting at 0x02.
Funded by zorg.
2018-12-15 23:04:24 +01:00
07e466cf3b
[Reverse-engineering] [th01/th02/th04/th05] Player hit flag
...
Funded by zorg.
2018-12-15 22:57:36 +01:00
nmlgc