search

eatcomics / libperspective

LibPerspective is a utility library for writing software on Sega Dreamcast VMU - By Kresna
zlib License
4 stars 2 forks source link

Feature request: get/set pixel #1

Open jeff8j opened 9 months ago

jeff8j commented 9 months ago

This has been working great on a small animation using sprites! I keep looking for how to change a individual pixels without sprite overhead

I would love some pixel features like P_Get_Pixel P_Set_Pixel P_Invert_Pixel

I am just not smart enough with assembly especially the vmu assembly

gyrovorbis commented 9 months ago

Yo, just a heads up, a bunch of us VMU guys have been talking about this request. We think it's a really reasonable one and will hopefully have something for you fairly soon, if you haven't rolled something for yourself already!

gyrovorbis commented 9 months ago

Also,

I am just not smart enough with assembly especially the vmu assembly

No, the VMU's XRAM layout is just INSANE. Nobody should have to deal with that crap. lmao.

jeff8j commented 9 months ago

That is awesome you guys rock! Im glad the obscure little potato still gets some love.

gyrovorbis commented 9 months ago

Here's the PR for it: https://github.com/eatcomics/libperspective/pull/2

Looks like we don't have write privileges on this repo, though,and @eatcomics will have to merge it!

jeff8j commented 9 months ago

vmi files.zip The setting pixel works perfectly! Thats all that I have tried so far but this vms draws to every pixel no problem. Thank you so much!

In my experiments I see that the timing for the screen is in the vmi right now its 14fps and from the eye is doing that; Is the blit function syncing with the screen somehow? My best guess is its something to do with these clr1 ocr, 5 set1 ocr, 5

jeff8j commented 9 months ago

Setting the GameHeader.i animation speed didnt have an effect on the updates so I guess its not in sync like I thought. I know this is getting a bit off topic but is there a way to time/sync the frame updates to something reliable?

Here is a test I have been doing https://github.com/centrexity/dc_vmu_framerate/tree/main

eatcomics commented 8 months ago

Sorry, I was on a trip all last week. I just merged the PR from jvsTSX. I'll have to take a look at the frame updates.