On Mon, Sep 20, 2010 at 04:20:26PM +0200, Per Inge Mathisen wrote: > On Mon, Sep 20, 2010 at 4:05 PM, Giel van Schijndel <m...@mortis.eu> wrote: >> I would like to propse to add a linear algebra library as a dependency >> to Warzone. One library I have in mind (and have had good experience >> with in the past) is Eigen [1]. > > Eigen is really nice. However, it requires turning every piece of code > it touches, and the matrix code touches quite a bit of code, into C++.
We'd only need to change the pieces of code that actually perform computations with these vectors directly because both types (e.g. Eigen's Vector3f and our Vector3f) have the same memory-layout. > I also could not find any info on whether it would solve our > determinism issues wrt various compilers doing floating point rounding > slightly different. Not that it has to solve this, we can keep > avoiding this problem by avoiding floating point in game logic code. Eigen is template based, so we could implement fixed-point math in a FixedPointInteger type of class then instantiate vectors/matrices from that. -- Giel
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