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-   -   Space Invaders (http://eab.abime.net/showthread.php?t=105132)

Havie 24 December 2020 21:53

Space Invaders
 
Here is my Space Invaders that started as a question about source code in the Blitz Basic coding thread. After putting together a demo, I got sucked in to making a full version of the game as close to the original as possible!

Still a few things to do and no doubt some bugs will be found but all comments most welcome...

https://eab.abime.net/zone/Invader.adf

Original thread here:

https://eab.abime.net/showthread.php?t=104414&page=3

DamienD 25 December 2020 00:59

Cool, thanks Havie :great

Will take a look now before bed :sleep

jotd 25 December 2020 01:04

and to edit https://eab.abime.net/showthread.php?t=85200 :)

(oh and I thought: no links to the zone too ...)

Havie 25 December 2020 01:22

Quote:

Originally Posted by jotd (Post 1448274)
and to edit https://eab.abime.net/showthread.php?t=85200 :)

(oh and I thought: no links to the zone too ...)

Sorry - are links to zone not allowed? If not, I'll happily unlink and upload tomy website instead (which I will do in due course). Cheers.

Havie 25 December 2020 01:24

Quote:

Originally Posted by jotd (Post 1448274)
and to edit https://eab.abime.net/showthread.php?t=85200 :)

(oh and I thought: no links to the zone too ...)

Sorry - are links to zone not allowed? If not, I'll happily unlink and upload to my website instead (which I will do in due course).

Cheers.

earok 25 December 2020 01:34

Gave it a quick go. Very cool, feels very much like the original. I'm assuming it's 1 bitplane with copper rainbow for green at the bottom of the screen?

DamienD 25 December 2020 01:35

Quote:

Originally Posted by Havie (Post 1448276)
Sorry - are links to zone not allowed? If not, I'll happily unlink and upload to my website instead (which I will do in due course).

Cheers.

Of course it's ok to upload files to The Zone!

The reason why the rules state that you shouldn't post direct links is as follows:

Quote:

Originally Posted by Paul
Also Please don't direct link to files in The Zone when creating a 'new thread' or 'replying to a post', because files in the zone are auto deleted !


Havie 25 December 2020 01:40

Quote:

Originally Posted by DamienD (Post 1448280)
Of course it's ok to upload files to The Zone!

The reason why the rules state that you shouldn't post direct links is as follows:

Doh - that makes complete sense. Will rectify in the next few days...

Thanks for setting me straight.

DamienD 25 December 2020 01:46

Quote:

Originally Posted by Havie (Post 1448281)
Doh - that makes complete sense. Will rectify in the next few days...

Thanks for setting me straight.

It's no biggie ;)

People don't get warnings or bans for posting The Zone! file links :p

DamienD 25 December 2020 02:00

Quote:

Originally Posted by jotd (Post 1448274)

I'm not sure I should add to that thread; is it really a port?

Were the Arcade graphics ripped / used etc...

Havie 25 December 2020 07:20

Yes - it's arcade graphics and basically a port. It follows the arcade game as closely as possible - invader movement and firing pattern, ufo movement and scoring - all based on original source code. Even emulates coloured overlay using the copper. Not 100% perfect but pretty close.

Havie 25 December 2020 07:33

Quote:

Originally Posted by earok (Post 1448279)
Gave it a quick go. Very cool, feels very much like the original. I'm assuming it's 1 bitplane with copper rainbow for green at the bottom of the screen?

It's actually 2 bit planes as I needed a non-transparent black because everything is directly blitted to the screen with a black border and erases what was there. No double buffering required. Also, at the bottom there are two colours in the same row as the green overlay didn't rurun across the whole screen at this point.

Thanks for trying it - I think it feels like the original.

DamienD 25 December 2020 13:16

Quote:

Originally Posted by Havie (Post 1448306)
Yes - it's arcade graphics and basically a port. It follows the arcade game as closely as possible - invader movement and firing pattern, ufo movement and scoring - all based on original source code. Even emulates coloured overlay using the copper. Not 100% perfect but pretty close.

Alrighty, perfect ;)

...now added to the Ports / Conversions --> Amiga thread.

jotd 25 December 2020 16:56

now new challenge, re-do a game starting with "A" so you can be listed before my remake :)

just tried it: it's the original in all it's pseudo monochrome greatness.Even the crappy fonts are there. Excellent.

S. Campbell 26 December 2020 02:52

Quote:

Originally Posted by Havie (Post 1448248)
Still a few things to do and no doubt some bugs will be found but all comments most welcome...

Really nice work so far, but you've got the shooting sound effect and the exploding-invader sound effect the wrong way round...

saimon69 26 December 2020 04:14

I just seen this and look very good: something is missing at least for me, though:
- ever thought to use the other playfield to make the effect of the background in the upright cabinet, where there was a 45 degrees glass so to show the screen mixed with it? (have the feeling somebody did ask for it)
This should be the front overlay
https://encrypted-tbn0.gstatic.com/i...Q-y1A&usqp=CAU

And this is how was looking
https://encrypted-tbn0.gstatic.com/i...YL5fg&usqp=CAU


- is missing the MODEL RACING label in the bottom that was present in the cabinets in italy in my area (was by the way an italian company not too far from my place that distributed officially space invaders for taito and also did its own arcade games)

TjLaZer 26 December 2020 06:04

Very nice port, good job!

zzbylu 26 December 2020 10:45

gameplay: https://www.youtube.com/watch?v=o5KWaXA6Xd4

Havie 26 December 2020 10:47

Quote:

Originally Posted by S. Campbell (Post 1448460)
Really nice work so far, but you've got the shooting sound effect and the exploding-invader sound effect the wrong way round...

Thanks - didn't realise, easily fixed.

Havie 26 December 2020 10:51

Quote:

Originally Posted by saimon69 (Post 1448462)
I just seen this and look very good: something is missing at least for me, though:
- ever thought to use the other playfield to make the effect of the background in the upright cabinet, where there was a 45 degrees glass so to show the screen mixed with it? (have the feeling somebody did ask for it)
This should be the front overlay
https://encrypted-tbn0.gstatic.com/i...Q-y1A&usqp=CAU

And this is how was looking
https://encrypted-tbn0.gstatic.com/i...YL5fg&usqp=CAU


- is missing the MODEL RACING label in the bottom that was present in the cabinets in italy in my area (was by the way an italian company not too far from my place that distributed officially space invaders for taito and also did its own arcade games)

Yes - I have the background and was considering adding this as an option using dual playfield mode but need a decent version in 8 colours for OCS/ECS and a 16 colour version for AGA (my efforts were poor). If someone were to make it then I will add it as an option as increasing number of bit planes should affect speed.


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