The software is open-source. I had a look at it some time ago, and it’s also pretty hard to understand, but modifying it to your [gwern’s] specifications should be doable.
Umineko runs on Nscripter, which is closed source according to wiki. Fate/Stay Night runs on Kirikiri2, which is, indeed open source.
I’m not sure if the Umineko translation worked like the Tsukihime one, where they ported it over to the open source ONscripter, but AFAIK there is no way to change the text scroll behavior.
I don’t know if this uses the same software as Fate, but if so, try using your scroll wheel. I find it smoother than keys or clicking.
Alas, my trackball has no scroll wheel. Sounds like it’d be hard to know when to stop, too.
The software is open-source. I had a look at it some time ago, and it’s also pretty hard to understand, but modifying it to your [gwern’s] specifications should be doable.
Umineko runs on Nscripter, which is closed source according to wiki. Fate/Stay Night runs on Kirikiri2, which is, indeed open source.
I’m not sure if the Umineko translation worked like the Tsukihime one, where they ported it over to the open source ONscripter, but AFAIK there is no way to change the text scroll behavior.
They did indeed port it to ONscripter, so that’s the one I’m referring to.
I remember doing.. something.. to the text scroll behaviour, though not what. The source isn’t that impenetrable.