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Subject: [boost] Interested in a generic safe ndimensional matrix/vector library?
From: Ð¢Ð¸Ð¼Ð¾Ñ„ÐµÐ¹ Ð˜Ð³Ð½Ð°Ñ‚ÑŒÐ¸Ñ‡ (fhq_at_[hidden])
Date: 20110221 15:19:42
c++0x features allow us to implement some nice stuff:
 Safe variadic functions with parameter count checking. For example consider a constructor of the N dimensional vector of T takes only N farameters that are convertable to T and fails othervise:
vector<T, N> v(/*...N parameters convertable to T...*/);
vector<float, 3> v(1,2,3); // good
vector<float, 4> v(1.f,2.f); //fails
vector<int, 3> v(1,2,3,4); //fails
vector<int, 4> v(1,2,3,4); //good
or an N dimensional cross product function that takes exactly N1 vectors of dimension N:
cross(v1,v2,v3,/*...*/, vn1);
Please note that N is arbitrary positive integer and is only restricted by compiler's template recursion depth.
 Same type comversion as for fundamental types. This means that char multiplied by int gives int result and int multiplied by float gives float result. vectors work exactly the same:
vector<float, 3> vf;
vector<int, 3> vl;
vector<short, 3> vs;
vector<double, 3> vd;
vi*vf; //returns vector<float, 3>
vf*vd; //returns vector<double, 3>
vs*vi; //returns vector<int, 3>
Among other notable features are matrix matrix and vector matrix multiplications, component vise addition/substraction/multiplication/division, dot product, matrix inversion, matrix determinant calculation, etc.
I want to know if there is any interest in such a library in boost community, and if so to make it available for public inspecion and criticism.
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