forked from M-Labs/nalgebra
Replaced an uggly for by a bit less uggly while for the matrix inversion.
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@ -107,23 +107,30 @@ Inv for NMat<D, T>
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// FIXME: this is kind of uggly…
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// … but we cannot use position_betwee since we are iterating on one
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// columns
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let mut n0 = dim; // index of a non-zero entry
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let mut n0 = 0u; // index of a non-zero entry
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for uint::range(k, dim) |i|
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while (n0 != dim)
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{
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n0 = k;
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if (cpy[(i, k)] != _0T)
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if (cpy[(n0, k)] != _0T)
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{ break; }
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n0 += 1;
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}
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assert!(n0 != dim); // non inversible matrix
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// swap pivot line
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if (n0 != k)
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{
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for uint::range(0u, dim) |j|
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{
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swap(cpy.mij, NMat::offset::<D, T>(n0, j), NMat::offset::<D, T>(k, j));
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swap(res.mij, NMat::offset::<D, T>(n0, j), NMat::offset::<D, T>(k, j));
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swap(cpy.mij,
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NMat::offset::<D, T>(n0, j),
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NMat::offset::<D, T>(k, j));
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swap(res.mij,
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NMat::offset::<D, T>(n0, j),
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NMat::offset::<D, T>(k, j));
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}
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}
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let pivot = cpy[(k, k)];
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