Wolfenphone 3D

It’s officially all downhill for me from now on, seeing that Wolfenstein 3D has officially arrived on the iPhone. If you are a friend/loved one, I am especially sorry.

John Carmack has written a detailed overview of this port project on id Software’s website. Here’s a bit of the timeline:

Late last year, the mobile team had finished up all the planned versions of Wolfenstein RPG, but EA had suggested that in addition to the hundreds of customized versions they normally produce for all the various mobile phones, they were interested in having another team do a significant media quality improvement on it for the iPhone. While Wolf RPG is a very finely crafted product for traditional cell phones, it wasn’t designed for the iPhone’s interface or capabilities, so it wouldn’t be an ideal project, but it should still be worth doing. When we got the first build to test, I was pleased with how the high res artwork looked, but I was appalled at how slow it ran. It felt like one of the mid range java versions, not better than the high end BREW as I expected. I started to get a sinking feeling. I searched around in the level for a view that would confirm my suspicion, and when I found a clear enough view of some angled geometry I saw the tell-tale mid-polygon affine swim in the texture as I rotated. They were using the software rasterizer on the iPhone. I patted myself on the back a bit for the fact that the combination of my updated mobile renderer, the intelligent level design / restricted movement, and the hi-res artwork made the software renderer almost visually indistinguishable from a hardware renderer, but I was very unhappy about the implementation.

I told EA that we were NOT going to ship that as the first Id Software product on the iPhone. Using the iPhone’s hardware 3D acceleration was a requirement, and it should be easy — when I did the second generation mobile renderer (written originally in java) it was layered on top of a class I named TinyGL that did the transform / clip / rasterize operations fairly close to OpenGL semantics, but in fixed point and with both horizontal and vertical rasterization options for perspective correction. The developers came back and said it would take two months and exceed their budget.

Rather than having a big confrontation over the issue, I told them to just send the project to me and I would do it myself. Cass Everitt had been doing some personal work on the iPhone, so he helped me get everything set up for local iPhone development here, which is a lot more tortuous than you would expect from an Apple product. As usual, my off the cuff estimate of “Two days!” was optimistic, but I did get it done in four, and the game is definitely more pleasant at 8x the frame rate.

And I had fun doing it.

That’s right: Carmack personally oversaw this project, and took less than a week to complete it. I’ve already spent a good chunk of my afternoon replaying this classic game on the iPhone and I’m blown away at how fluid and immersive it is.

But the best news of all? Carmack expects that “Classic Doom” will come out “fairly soon”. If Wolf 3D takes all but 4 days, I’m thinking we should be seeing this next weekend, right? 😉

[cross-posted over at First Wall Rebate]

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