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#1
avatar_dragon
Games / Re: Converted GX4000 .cpr - Th...
Last post by dragon - Today at 13:29
Quote from: Nich on 12:14, 14 April 24
Quote from: iXien on 11:23, 14 April 24Hum, interesting. I play this one several times and never shown the problem. But I trust you. And nobody found the problem to poke it ? It would be not too late to fix this version  ;)
I've tried, but I couldn't find any way to fix the bug. :(

I tell you my advances, so you can investigate to at same time if you want.

There is a subrutine in &5b43 That basically have these things:

IX array &51ef-&533f of 2 elements its the source to copy data to the screen zone (&c000/&cfff) of a ldir.
iY array &4ca4-&4dee of 2 elements its the adress destination to copy data en the screen zone  of a ldir.

HL=&4f75-&50bf of 2 elements one contains a offset to add to the address of ix/iy , and the other has the BC of the ldir, the lenght data to copy in the ldir.
B=&A5 is the number of the elements of the arrays, i mean he do loops a5 times reading the arrays and write it to the screen with the ldir.

Ok so its the first part to understand the problem.

There is another subrutine in &644c I don't know the function but:

He have an array IX that begins in &4e34 with varius elements,I  think 00,+01,+02, is something related with player coordinates in the room, and +3 and +04 are something related to control de array.

He enter there when you put a dinamite, so he basically Walk through the array looking +03 and +04 positions to stop and use the elements of these index.

But every time it stop he modify +03 and +04, so the next time he don't stop in that index it continue searching and repeat.

ok so when you put a  dinamite:

1.ix=4f5b stop index 1
2.ix=4f60 stop index 2
3.ix=4f65 stop index 3
4.ix=4f6a stop index 4
5.ix=4f6f stop  index 5.
----------------------------
6.ix=5023 index 6
7.ix=5037 index 7

So he basically modify this in dinamite 6&7: HL=&4f75-&50bf of 2 elements one contains a offset to add to the address of ix/iy , and the other has the BC of the ldir, the lenght data to copy in the ldir.

So when &5b43 go to draw the screen, they draw in wrong adresses creating  the corruption in the screen.

That That's what I've found out so far.















#2
D
Programming / Re: triple buffering
Last post by djaybee - Today at 13:02
Deep inside, I can't stop thinking about a closely related question: what situations would benefit from triple-buffering, i.e. what are the types of graphics where the performance gains of triple-buffering outweigh the memory costs?

Typically, triple-buffering results in an unsteady frame rate, which is especially visible at high frame rates, such that it's not necessarily a good idea for situations where the level of complexity is similar from frame to frame (which is the case for anything that's heavy on sprites and background graphics). On the other hand, 3D games, especially those drawn with polygons, might have a slower frame rate and and an inherently unsteady frame rate, such that those might be more appropriate situations for triple-buffering. In good news, those games might rely less on backgrounds and sprites and bitmaps in general, so the memory pressure from having 3 buffers might not be so high.

No, I don't have time to try this (I already have a lot of code on my plate), but, if I did, especially on 6128, I'd be using a 136x160 mode 0 display, with my buffers in banks 2 and 3, core code in bank 0, and banks 1 and 4-7 for situations where code and data can be paged in and out. In such a scheme, I would use memory modes 0 and 4 through 7, but I also note that memory mode 2 could be useful if there's some compressed data that needs to be decompressed on demand (with all the usual caveats about memory mode 2 and interrupts, of course).
#3
avatar_Shaun M. Neary
Games / Re: CPC Formula 1 [WIP]
Last post by Shaun M. Neary - Today at 13:02
Looking forward to this.

Space Racing on the Spectrum was basically F-Zero before F-Zero was F-Zero :)
#4
L
Games / Re: CPC Formula 1 [WIP]
Last post by luckpro - Today at 12:43
Ok, i will take note, i will check what signs usually appear on F1 tracks and try to replicate them. 

Thanks for the feedback.
#5
avatar_roudoudou
Games / Re: CPC Formula 1 [WIP]
Last post by roudoudou - Today at 12:15
Quote from: luckpro on Today at 11:43
Quote from: cwpab on Yesterday at 09:57As a feedback, I'd say that it looks like you can't see s**t with the current camera and speed. Maybe the camera could be moved up a little or the speed reduced?

EDIT: I think it's the peculiar format of the video with margins. I suspect the movement would look normal in a normal video.
Like you, several people have told me that there is little ground to be seen.

I'll try to improve that part.

The video is recorded using the RVM emulator although the quality is not very good (twitter limits...).

Thank you for feedback.
ground seems big enough to me, you can improve readability with some columns or traffic signs maybe? Keep the speed! 8)
#7
L
Games / Re: CPC Formula 1 [WIP]
Last post by luckpro - Today at 11:43
Quote from: cwpab on Yesterday at 09:57As a feedback, I'd say that it looks like you can't see s**t with the current camera and speed. Maybe the camera could be moved up a little or the speed reduced?

EDIT: I think it's the peculiar format of the video with margins. I suspect the movement would look normal in a normal video.
Like you, several people have told me that there is little ground to be seen. 

I'll try to improve that part. 

The video is recorded using the RVM emulator although the quality is not very good (twitter limits...).

Thank you for feedback.
#9
Quote from: dodogildo on Today at 09:26It may be so that the articles are written using a bit of AI help. Then edited by human hands.
(There are many copyrighting tools: copy.ai etc..) That may be why the copy is somewhat tasteless and missing some information here and there.
It might also explain why some of the details seem off. Although language barriers and possibly a lack of deep technical knowledge could also account for that.
#10
avatar_dodogildo
Other retro / Re: The architecture of every ...
Last post by dodogildo - Today at 09:26
It may be so that the articles are written using a bit of AI help. Then edited by human hands.
(There are many copywriting tools: copy.ai etc..) That may be why the copy is somewhat tasteless and missing some information here and there.
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