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Bill Murray - nametable/sprite generator
https://forums.nesdev.com/viewtopic.php?f=22&t=9801
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Author:  rainwarrior [ Tue Feb 12, 2013 7:32 pm ]
Post subject:  Bill Murray - nametable/sprite generator

I felt like making a real NES version of an image of Bill Murray made by Svetlana, but it used colours a little bit liberally and I wasn't sure if it could be managed or not. So... I wrote a quick python program to try to automate the process of building a nametable and overlaid sprites.

ROM: bill.nes
Source: bill.zip (ca65 + python 3)

The process looked like this:
Image Image Image

1. Choose some palettes by hand. (This could probably be automated, but that'll be an exercise for the next time I do this.)
2. Generate nametable by choosing the attribute palette that will maximize the number of pixels in the corresponding nametable block.
3. Progressively create sprites from the leftover pixels.

There are a lot of different ways I could approach step 3. What I settled on for this project was to greedily take the sprite which maximizes pixel coverage. This worked okay for this, but was kinda subject to overlap problems, and also tends to isolate pixels at the edges, which end up taking up their own sprites.

Anyhow, this was just a quick and dirty project for me, but I thought it might be useful to share the source for anybody who needs an example.

(The music is also by Svetlana.)

Author:  MottZilla [ Tue Feb 12, 2013 9:34 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

I was so confused when I saw this thread title. Pretty neat program though.

Author:  doppelganger [ Tue May 28, 2013 8:15 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

Well, you certainly made Bill Murray look like Bill Murray. Good job.

Author:  unregistered [ Thu May 30, 2013 3:59 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

How does your program start... there is no input code? :?

Author:  rainwarrior [ Thu May 30, 2013 4:11 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

What do you mean by "input code"?

Author:  unregistered [ Thu May 30, 2013 4:18 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

well... like there's no controller reading... it doesn't ever do anything. In my head I expected a press the A button to start the pixel sprite dissappearance part.

Author:  rainwarrior [ Thu May 30, 2013 4:22 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

Oh, no, that animation was made by the python script that builds the sprite data. This ROM is not interactive.

Author:  unregistered [ Thu May 30, 2013 4:29 pm ]
Post subject:  Re: Bill Murray - nametable/sprite generator

rainwarrior wrote:
Oh, no, that animation was made by the python script that builds the sprite data. This ROM is not interactive.
Ok. I thought it would be. Sorry. :(

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