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| author | Miquel Sabaté Solà <mikisabate@gmail.com> | 2025-05-15 22:06:00 +0200 |
|---|---|---|
| committer | Miquel Sabaté Solà <mikisabate@gmail.com> | 2025-05-16 07:55:56 +0200 |
| commit | 638dfdca6e773d4b1ec573606cac90bdb1778667 (patch) | |
| tree | 73f60ee0aca0c0585f0fd8063ccc7bb31881e543 /src/vectors.s | |
| parent | 72894d68c4fbd8c2b843afa70244dee3b6241414 (diff) | |
| download | jetpac.nes-638dfdca6e773d4b1ec573606cac90bdb1778667.tar.gz jetpac.nes-638dfdca6e773d4b1ec573606cac90bdb1778667.zip | |
Initialize enemies at a random Y coordinate
The randomness comes from a pre-computed table of "random" numbers. This
is of course the most simple technique you can come across a code base
for the NES/Famicom, but for the purposes of this game is good enough
and (most importantly) fast.
Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>
Diffstat (limited to 'src/vectors.s')
| -rw-r--r-- | src/vectors.s | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/vectors.s b/src/vectors.s index 75de30a..77ce0bc 100644 --- a/src/vectors.s +++ b/src/vectors.s @@ -104,6 +104,12 @@ .endif ;; TODO: some actions here will depend on the status of the game... + lda Globals::zp_flags + and #%00000001 + bne @ppu_registers + + ;; Increase the random seed. + inc Prng::zp_rand ;; Decrease title timer. lda Title::zp_title_timer |