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Tool for extracting sprite graphics from a 7800 rom

sprite graphics tool 7800

13 replies to this topic

#1 NostAlgae37 OFFLINE  

NostAlgae37

    Star Raider

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Posted Thu Nov 1, 2018 9:16 PM

Is there such a thing?  There is a game whose sprites I'd like to have a go at editing, but unfortunately I don't know where to begin.  Thanks.

 



#2 Eagle OFFLINE  

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Posted Fri Nov 2, 2018 1:45 PM

You can try Omnivore for Atari XL/XE

https://playermissile.com/omnivore/

Click right button on "Bitmap" window and set Bitmap Width=256

Go to View->Bitmap Display->2bpp

You can change colors in View->Bitmap->Color->Choose Colors

Remember, the graphics is upside down.

Attached Thumbnails

  • Omnivore.png

Edited by Eagle, Fri Nov 2, 2018 1:59 PM.


#3 Defender_2600 OFFLINE  

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Posted Fri Nov 2, 2018 3:18 PM

Which game are you thinking? :)



#4 NostAlgae37 OFFLINE  

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Posted Fri Nov 2, 2018 8:28 PM

Which game are you thinking? :)

 

I don't know if I want to disclose that yet...  I might want to keep it a secret until the unveil.  ;-)



#5 Defender_2600 OFFLINE  

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Posted Fri Nov 2, 2018 9:48 PM

 

I don't know if I want to disclose that yet...  I might want to keep it a secret until the unveil.  ;-)

 

 

I understand, indeed I have a lot of "secret" jobs (WIP) that at the moment I can not share for various reasons.
 

For example, among these projects, I think you'll be glad to know that some time ago I started working on the graphics of Perry's Dig Dug XM ( I'm looking at your avatar :) ).



#6 NostAlgae37 OFFLINE  

NostAlgae37

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Posted Fri Nov 2, 2018 10:58 PM

For example, among these projects, I think you'll be glad to know that some time ago I started working on the graphics of Perry's Dig Dug XM ( I'm looking at your avatar :) ).

 

:-o  I love you, man.  :-D  Now I know that will be a must-purchase.  :thumbsup:  



#7 NostAlgae37 OFFLINE  

NostAlgae37

    Star Raider

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Posted Sat Nov 3, 2018 10:47 AM

You can try Omnivore for Atari XL/XE

https://playermissile.com/omnivore/

Click right button on "Bitmap" window and set Bitmap Width=256

Go to View->Bitmap Display->2bpp

You can change colors in View->Bitmap->Color->Choose Colors

Remember, the graphics is upside down.

 

OK, I downloaded Omnivore (the 1.0rc4 version) and followed your instructions up until the part where you said View->Bitmap->Color->Choose Colors (it doesn't have those options under View), so the colors are wonky but more importantly how do I edit the bitmap or save/export it for editing in another program?  Thanks.



#8 Eagle OFFLINE  

Eagle

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Posted Sat Nov 3, 2018 2:44 PM

 

it doesn't have those options under View

I notice that ;) But it is not important. Because Maria can display sprites using different palettes. Each sprite can have a different bit combination for colors. Then you will have to set colors for each sprite separately ;(

 

 

 more importantly how do I edit the bitmap or save/export it for editing in another program?

 

I don't have a simple answer. I would copy the sprite data from Omnivore and convert it to graphics.

I tried to find a tool that would help you. Unfortunately, nothing comes to my mind.
The only solution that comes to my mind now is printscreen.
Paste into the graphics program (for example MSPaint), crop sprite and resize X and Y = 20%

It is a very primitive method but it works.

Remember this works only for 160A mode!

Attached Thumbnails

  • paint.png


#9 R_Leo_1 OFFLINE  

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Posted Sat Nov 10, 2018 11:39 PM

I can't get this method to work for me, there's got to be an easier way to edit the graphics, I've seen graphic hacks for the 7800 before.



#10 Eagle OFFLINE  

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Posted Sun Nov 11, 2018 11:49 AM

http://loktar00.gith...tariRomDisplay/

try this one



#11 R_Leo_1 OFFLINE  

R_Leo_1

    Star Raider

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Posted Sun Nov 11, 2018 12:00 PM

 

Thanks, this is good for viewing the rom, but I'm still not sure how I would edit those graphics.



#12 Eagle OFFLINE  

Eagle

    Chopper Commander

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Posted Sun Nov 11, 2018 3:38 PM

I doubt that there would be a universal tool for this.

A7800 has no graphics banks like other computers or consoles. Display list complicate this.

A7800 can do different sizes for each zone from 1 to 16, mostly is 16 but for example I'm using recently 12. Also sprite width can be various.

Data graphics is up side down, every sprite can have different colours. I do not even want mention about 160B mode ;)

Editing graphics without programming skills will be very difficult.


#13 EricBall OFFLINE  

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Posted Wed Nov 14, 2018 11:08 AM

See https://atariage.com...-color-mapping/for a list of how the data bits are mapped to palette entries if you're interested in creating or adapting an existing tool.



#14 gambler172 OFFLINE  

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Posted Sat Nov 24, 2018 10:58 AM

I use a tool called TILEMOLESTER...







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