Keen: Modding

As far as I know, a Galaxy save file incorporates a carmack compressed level, the list of sprites, and some other variables. But even the Keen Galaxy save mechanism isn't perfect, as is evidenced by all the savegame hacks.

Also, what is the format of the patch database files?

Looks pretty neat so far. A couple things I would request: A function to check if patches overlap each other, that prints out which bytes overlap (is this included in the incompatbility checker?) A method of incorporating existing patch files that I write by myself (and, checking if my own patches o...

I got stuck in the upwards shooting ice cannon (the first one).

Ahaha finally figured out the "Change H" parameter. It allows very fleeting actions (ie 0 delay actions) to not be drawn to the screen.

All of this information is now on the Keen Wiki, and a few corrections have been made, so refer to that from now on.

An alternative would be to give the editor a "put the latest level edited into slot 1" mode, and the option to edit a dummy world map that has level 1 right next to the start. I think that making custom patches for each game would be a headache, and it wouldn't save THAT much time anyway s...

You can pass through the electricity gates on hard mode by use of the Gik. I like that little trick.

As Malv said, there's a whole lot of memory in the game state that must be saved, including all of the map, the sprites, keen's stats, and probably a bunch of other variables that are scattered all over the place.

Hi Fleexy, A GUI patching tool sounds like a good idea, but I think what you have proposed doesn't really provide anything that isn't already available. The Keen Wiki is quite easy to use (just copy/paste), it is maintainable by a community, and the search function makes it easy enough to find thing...

The temporary score is a double word though, and the life is only a word, so you would need to find some other part of memory that isn't used.

Maybe the extra sound slots.

This is way too complicated.

It's just in it's triannual dormancy. It'll be back someday.

1. Okay when I get time. It will probably won't overwrite the complex platform patch.

2. no

3. Yes that is right.

http://www.arl.wustl.edu/~lockwood/clas ... m/toc.html

You can also get the online version here, but the PDF version is better, and it comes with appendices and exercises.

Also make sure you download the companion software, as it's a good resource.