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DanielLC comments on What are you working on? July 2013 - Less Wrong Discussion
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Non-euclidean graphics program. It's a computer program to show what life would look like if triangles didn't have 180 degrees, stuff could be bigger or smaller on the inside, and you could do this.
Also, I've done a little work on a special relativity bullet hell game. This results in an odd effect as you accelerate the ship where it looks like what you're accelerating towards is actually moving away from you, and there's a lot of redshifting and blueshifting. Also, I'm hoping to include faster-than-light travel. For most of the game, this will mean that you could be hit by a tachyon by an enemy moving away from you, return fire, and hit them before they shot, ensuring that the shot was never fired and giving you back your health. The final boss will be given a faster-than-light drive, resulting in him often appearing on the screen multiple times at once, and I might allow you to use it after defeating him, with encouragement to fly through the game backwards following your past self. It would be hard to dodge bullets while moving faster than light, though.
I'm considering making this open source, but I might want to try turning a profit.
In that link, is that the 3 dimensional analog of living on a 2D plane with a hole in it, and when you enter the hole, you flip to the other side of the plane? (Or, take a torus, cut along the circle farthest from the center, and extend the new edges out to infinity?)
That's what it's supposed to look like. The link just used smoke and mirrors to get the effect, and didn't get it right. For example, in a true manifold, you can see any point from any other point. This is because there is some shortest path between the points, and that path is a geodesic. In the link, you can only see one side of the other side of the portal.
Have you seen this? (I haven't actually tried it myself so I don't know how comparable it is to your game, but seems somewhat related.)
Yeah. Someone mentioned that last time I mentioned this on a what are you working on thing.
It's not very similar. Being 3d changes a lot of it, since you don't have to deal with sprites. Also, it has a preferred point of reference. If you let go of the controls, you always end up moving at the same velocity. In addition, you can only move so fast compared to that. In mine, velocity is relative. If you let go of the controls, you just stop accelerating.