Colin McMillen
7eeeca9487
Add only one point per enemy killed.
2015-06-07 08:57:05 -04:00
Colin McMillen
ac5dcc504a
Check collisions between player shots & enemies.
2015-06-07 08:55:45 -04:00
Colin McMillen
c5c3297237
Pull out a separate CheckCollision function.
2015-06-07 08:04:37 -04:00
Colin McMillen
4ca3bec032
Small code cleanups.
2015-06-07 07:28:43 -04:00
Colin McMillen
a387160fdd
Make an explicit cooldown for spawning the next ship.
2015-06-06 18:14:20 -04:00
Colin McMillen
c17b137ab2
Remove username from TODOs
2015-06-06 18:05:57 -04:00
Colin McMillen
08fae310e8
Add shots that come from enemy ships.
2015-06-06 12:52:25 -04:00
Colin McMillen
1a37dfe08b
Add screenshot to README.md
2015-06-06 11:30:31 -04:00
Colin McMillen
aec5466f74
Update README.md
2015-06-06 10:25:47 -04:00
Colin McMillen
d7f0119cb6
Tweak ship / shot spawn rates.
2015-06-06 10:05:46 -04:00
Colin McMillen
d460a519af
Add enemy ships.
2015-06-06 08:38:37 -04:00
Colin McMillen
1c7b6fde81
Tweak to collision-detection.
2015-06-01 23:11:50 -04:00
Colin McMillen
ca8926f567
Add display of player health.
2015-06-01 23:05:37 -04:00
Colin McMillen
b238fa2d37
Collision detection between player and enemy shots.
2015-06-01 21:23:53 -04:00
Colin McMillen
f5b67dd535
Change shots to be single-shot and 8x8 sprite size.
2015-06-01 19:42:19 -04:00
Colin McMillen
a92499fc40
Fix a bug - *now* we don't need InitSpriteTables.
2015-06-01 00:35:25 -04:00
Colin McMillen
abddbf0033
Turns out we did still need InitSpriteTables.
2015-06-01 00:28:43 -04:00
Colin McMillen
2bb1bc161d
Add multiple enemy shots.
2015-06-01 00:18:03 -04:00
Colin McMillen
4bf0033962
Make enemy sprites red.
2015-05-31 18:08:52 -04:00
Colin McMillen
526bc9e320
Spawn enemy shots from right edge of screen.
2015-05-31 18:03:46 -04:00
Colin McMillen
d81c9a9e4b
Refactor jmp -> bra.
2015-05-31 17:40:22 -04:00
Colin McMillen
29d4ff2309
Update README.md
2015-05-31 17:33:45 -04:00
Colin McMillen
398d62d22d
Update README.md
2015-05-31 17:33:32 -04:00
Colin McMillen
12d4c9c5f4
Update README.md
2015-05-31 17:24:04 -04:00
Colin McMillen
f51a544956
Various refactorings.
...
Rename InitializeFoo -> InitFoo.
Break UpdateWorld into a few functions.
shotArray -> playerShotArray.
2015-05-31 17:20:13 -04:00
Colin McMillen
98aedecd4c
Create array for enemy shots.
...
Move "memory layout" comments and definitions into memory.asm.
2015-05-31 17:07:01 -04:00
Colin McMillen
4521c5d96b
Remove InitializeSpriteTables routine.
2015-05-31 16:49:22 -04:00
Colin McMillen
0fa70c0889
Make a table of possible shot velocities.
...
Also fix bug caused by omission of "clc" before "adc".
2015-05-31 16:30:17 -04:00
Colin McMillen
eb7757a8b3
Change shot sprite to be up against left edge.
...
Also fix a bug where some entries of the sprite buffer weren't being
cleared.
2015-05-31 15:05:37 -04:00
Colin McMillen
6eab6050e8
Allow for negative x-velocity.
2015-05-31 14:31:13 -04:00
Colin McMillen
54d2828bf6
Shinier star graphic.
2015-05-31 13:35:06 -04:00
Colin McMillen
b802431925
Change output file extension .smc -> .sfc
2015-05-31 12:32:36 -04:00
Colin McMillen
1dc44a3f00
Move sprite table RAM location.
2015-05-31 12:27:30 -04:00
Colin McMillen
bac214a95b
Fix subtraction / two's complement bug.
2015-05-31 11:36:14 -04:00
Colin McMillen
e39f802bd5
Loop through shots array to find an empty spot.
2015-05-31 11:31:18 -04:00
Colin McMillen
7d0140d233
Alternate up-shots and down-shots.
2015-05-31 11:05:04 -04:00
Colin McMillen
5ace3844dc
Shots can now have negative y-velocity.
2015-05-31 10:45:29 -04:00
Colin McMillen
611b4d20f2
Update world & sprites in separate loops.
...
Also give shots a y-velocity.
2015-05-30 22:43:27 -04:00
Colin McMillen
25a2fb20ab
Change bit-format of scratch sprite table.
...
Now each sprite's bits count as: "1 = large" and "1 = enabled", which is
more intuitive.
2015-05-30 12:02:25 -04:00
Colin McMillen
48db4aca58
Don't bother storing zeroes to joypad registers.
2015-05-30 11:32:35 -04:00
Colin McMillen
116d591c60
Update shot speed and cooldown timer.
2015-05-30 11:08:26 -04:00
Colin McMillen
510aca6ed3
More register documentation.
2015-05-30 11:04:22 -04:00
Colin McMillen
49abebc211
Allow more than 4 shots.
2015-05-30 10:53:31 -04:00
Colin McMillen
0e7d46c46f
Don't read joysticks during auto-joypad read.
2015-05-30 09:28:07 -04:00
Colin McMillen
5c45dfa834
Make macros for setting 16bit/8bit registers.
...
Also disable NMI while processing, and start refactoring joypad handler.
2015-05-30 09:03:55 -04:00
Colin McMillen
8c5b4232c1
Add a period.
2015-05-29 08:04:38 -04:00
Colin McMillen
36b54692c1
Simplify handling of secondary sprite table.
...
We now keep a buffer that has one byte per sprite, and later pack it
into the bitfield format wanted by OAM, instead of calculating the
bitfield manually during UpdateWorld
2015-05-29 08:03:20 -04:00
Colin McMillen
7a04a359fa
Tighten up vBlankCounter code.
2015-05-28 08:44:38 -04:00
Colin McMillen
325006664b
and+cmp -> bit where possible
2015-05-28 07:17:09 -04:00
Colin McMillen
7b637436b8
Define a constant for shot array length.
2015-05-27 07:51:51 -04:00
