Pseudo pixel game prototype.

Since we do not have native C compilers on the Oric, this forum will be mostly be used by people using CC65 or the OSDK. But any general C related post will be welcome !
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jbperin
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Re: Pseudo pixel game prototype.

Post by jbperin »

Well .. yes ... I see what you all mean .. :D

One thing that stunned me in the H3 lib, is the nice packaging behind a very understandable API providing ultra convenient graphical routine (such as circle lines text ...)

But I admit that some nasty demo makers :twisted: had allways made isane usage of this technic. :shock:
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Dbug
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Re: Pseudo pixel game prototype.

Post by Dbug »

Well, you don't technically need the API,
my 256 bytes "circles" intro uses CIRCLE to draw things in HIRES, and then it's copied to the charset and displayed in TEXT.

It's not as fast as drawing directly in the charset, but on the other hand 100% of the existing HIRES commands do work.


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Chema
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Re: Pseudo pixel game prototype.

Post by Chema »

Also, Oricium is all text mode. All sprite masking & animation is done by redefining characters. Even the pixel scroll in the starfield.

And the radar at the bottom.

The code is in the repo, if you're interested.
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jbperin
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Re: Pseudo pixel game prototype.

Post by jbperin »

Dbug wrote: Wed Dec 28, 2022 6:34 pm uses CIRCLE to draw things in HIRES, and then it's copied to the charset and displayed in TEXT.

It's not as fast as drawing directly in the charset, but on the other hand 100% of the existing HIRES commands do work.
Because that's a kind of magic to me, I consider it is witchcraft :lol:

It reminds me of a sophisticated bit alignment tricks in character adressing in the charset that you had talked to me about .. but I can't remember the details. Anyway nice effects
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Dbug
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Re: Pseudo pixel game prototype.

Post by Dbug »

The only magic is the system flag that allows the ROM to access to draw the HIRES command despite being in TEXT mode.

After it's just a matter of copying whatever is in $A000 to the charset area.
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xahmol
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Re: Pseudo pixel game prototype.

Post by xahmol »

First Dbug, please ignore me reporting your post, answered using the wrong button again. Of course I meant the quote button instead of the report button.

Second: with your explanation it is suddenly so simple.
I am exploring more and more those nice demo techniques in 6502 assembler for different machines (but still seriously lack time to proceed fast in it)
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Re: Pseudo pixel game prototype.

Post by Bodhi »

Interesting that nowadays people seem to be able to get a lot more out of a wide variety of computers than they did back then. :D
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Dbug
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Re: Pseudo pixel game prototype.

Post by Dbug »

Bodhi wrote: Tue Jan 10, 2023 12:45 am Interesting that nowadays people seem to be able to get a lot more out of a wide variety of computers than they did back then. :D
No, it's totally logical:
- All the documentation is available
- All the hardware qwirks are known
- There are emulators with built-in debuggers
- Cross compiler/assemblers are much more powerful and faster than original native hardware
- You can brute force a lot of things (color reduction, data compression, ...) using modern computers
- And using cross builds means you can use 100% of the memory of the target computer, you don't have to reserve any memory for your assembler or debugger.
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Re: Pseudo pixel game prototype.

Post by Bodhi »

Dbug wrote: Tue Jan 10, 2023 8:06 am
Bodhi wrote: Tue Jan 10, 2023 12:45 am Interesting that nowadays people seem to be able to get a lot more out of a wide variety of computers than they did back then. :D
No, it's totally logical:
- All the documentation is available
- All the hardware qwirks are known
- There are emulators with built-in debuggers
- Cross compiler/assemblers are much more powerful and faster than original native hardware
- You can brute force a lot of things (color reduction, data compression, ...) using modern computers
- And using cross builds means you can use 100% of the memory of the target computer, you don't have to reserve any memory for your assembler or debugger.
Yes, you are right. I did not have this in mind. So I'm looking forward of new games to come. My abilities are limited to a little BASIC. :-)
Now I have to refresh and expand my french I learned at school to read all the magazines ;-)
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rax
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Re: Pseudo pixel game prototype.

Post by rax »

I missed this discussion.
I will try to explain as soon as possible.
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