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not-that-dumb matrix*vector multiplication

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This commit is contained in:
Mirek Kratochvil 2012-05-21 20:16:29 +02:00
parent 90279968f8
commit 3758f23f44
1 changed files with 2 additions and 6 deletions
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8
lib/matrix.cpp
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@ -200,11 +200,7 @@ bool matrix::mult_vec_right (const bvector&a, bvector&r)
uint w = width(), h = height();
if (a.size() != w) return false;
r.resize (h, 0);
for (uint i = 0; i < h; ++i) {
bool t = 0;
for (uint j = 0; j < w; ++j)
t ^= item (j) [i] & a[j];
r[i] = t;
}
for (uint i = 0; i < w; ++i)
if (a[i]) r.add (item (i) );
return true;
}