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Games that do not use hit detection?


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#1 doctorclu OFFLINE  

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Posted Thu Mar 22, 2018 7:43 AM

So what are some games that do not use hit detection?   I figure games that do not have something being shot, games where you don't run into things, you know, pretty boring games.  :P

 

But one such scenario that comes to mind is Dragster by Activision.   Dragster works pretty independent of other items, the trick is not blowing up your engine, etc.

 

So what other games don't rely on interaction with other characters in the game?

 

-----------------

 

(Why do I ask?   Atari 2600 emulator, Virtual VCS, has a lot working, except the hit detection.  So until that is resolved.)



#2 Thomas Jentzsch OFFLINE  

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Posted Thu Mar 22, 2018 7:49 AM

Many games do not use the collision registers but use software collision detection. This is especially required when flicker comes into play.

 

E.g. Asteroids should work in your case.


Edited by Thomas Jentzsch, Thu Mar 22, 2018 7:49 AM.


#3 Deteacher OFFLINE  

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Posted Thu Mar 22, 2018 7:59 AM

Hangman, Fun with Numbers, Flag Capture, Math Grand Prix, Video Checkers, Video Chess, Blackjack, Casino, Bridge, Othello, Slot Machine...I'm sure there are more, but those are the ones that come to mind.



#4 Mr SQL OFFLINE  

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Posted Thu Mar 22, 2018 8:07 AM

Starblitz and KC Munchkin Monster Maze detect collisions even when they occur off screen. Rather than being boring this creates even more action than on screen collision detection via the collision registers, so these may be fun games to test Virtual VCS with.

 

http://www.pouet.net...php?which=64999

 

Depending upon what Virtual VCS supports, there are both SuperCharger and CBS RAM variants of the game on my site.



#5 doctorclu OFFLINE  

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Posted Thu Mar 22, 2018 11:38 AM

These are all good ones to try out, and I have been made aware of different types of hit detection.   Can't wait to try some of these games out.

 

I'm wondering if there is a hex value set I could look for in 2600 roms that would be the type of hit detection that is failing in these games that came loaded in VirtualVCS:

 

Combat

Pac-Man

Adventure

Defender

Yars Revenge

Berzerk



#6 Thomas Jentzsch OFFLINE  

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Posted Thu Mar 22, 2018 11:50 AM

You could check for "STA CXCLR" (85 2c) and remove those from your list.

 

That should filter most, but probably not all. Also a few too many might be filtered too. But it should be a start.



#7 doctorclu OFFLINE  

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Posted Thu Mar 22, 2018 12:19 PM

Yep, all the games I listed had the 85 2C hex codes in them.   Annnddd.. sure enough, Asteroids (and some of the suggested above) did not.

 

Oh this has the potential to be fun.   Or at least I learned something new.  :D

 

Here is a long shot: there is probably not an easy way to change the hit detection method?   For example one could not simply take the 85 2C and change them to another variable to have this work another way?

 

Sounds like the examples given above either have a non-onscreen detection method, some in-house software method, or just simply had no hit detection like we see in puzzle games and what not.


Edited by doctorclu, Thu Mar 22, 2018 12:24 PM.


#8 doctorclu OFFLINE  

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Posted Fri Mar 23, 2018 5:33 AM

Just wanted to thank all for the suggestions, and so far I have been able to find a fan version of Mario Brothers (4K) that works in all but the score.

 

Tried Asteroids, but so far no luck with anything higher than 4K.  Will keep trying because Dig Dug would also be fun.

 

That is more than VirtualVCS was doing before, so thanks and keep those suggestions coming.



#9 doctorclu OFFLINE  

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Posted Fri Mar 23, 2018 9:14 AM

Hey, is there a all in one collection for the 2600 I can download to help in finding games that work on the Atari 2600 / VirtualVCS ?

 

Nevermind...

 

https://www.atariage...&ItemTypeID=ROM


Edited by doctorclu, Fri Mar 23, 2018 9:20 AM.


#10 doctorclu OFFLINE  

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Posted Fri Mar 23, 2018 10:37 AM

So question for the weekend, any recommendation for hacking around the 85 2c detection or would you need to decompile and write in a different detection method?



#11 doctorclu OFFLINE  

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Posted Mon Mar 26, 2018 8:11 AM

No ideas?   That's cool.  Thanks for your input everyone, been awesome.   If you are reading this months or years from now, feel free to chime in.



#12 doctorclu OFFLINE  

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Posted Sun Apr 1, 2018 10:41 AM

304 games so far found without the 852c hit detection hex code.

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