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jak-project/goal_src
Grateful Forest 3eec4d2406 jak1: fix high fps ripples + frozen ripples (#4067)
Have done some custom ripples so thought I could fix this. At first I
scaled ripple speeds before realizing that wouldn't work if you change
FPS mid-game.

Instead I found the delta increment is there as a variable, and just
scaled that increment directly. I followed the same convention used
everywhere; just multiply by `DISPLAY_FPS_RATIO`.

That was the easy bit, the hard part was a second, unrelated issue,
whether you scale the delta or not, which is on level entry at high fps,
it shows no water movement at all.

I saw the delta was always being created at 0.0 on high FPS, and saw the
delta was computed nowhere in GOAL, only mips2c. I found inspiration
from [this
patch](https://github.com/open-goal/jak-project/blob/5ac5b6aae8f8058e76a27cd14d37db6c0b4d5821/goal_src/jak1/engine/common-obs/ropebridge.gc#L605-L611),
where the time ratio is changed to 60 FPS temporarily. However, fixing
the time ratio still created 0.0 deltas, and no matter what I did, it
always created 0.0 deltas.

I was about to give up, thinking there's no way to scale the mips2c
deltas. However, I found out why it was giving 0.0 deltas, which is on
high FPS, the video-mode is neither `pal` or `ntsc`, but `custom`, and
the misps2c code uses settings for `pal` or `ntsc`.

To include support for high FPS, I temporarily change it to `ntsc`, and
only apply this at the wave table creation when `custom`.
2025-12-08 18:32:20 -05:00
..
2025-04-16 20:57:43 +02:00