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#include <Imath/ImathMatrix.h>
#include <Imath/ImathMatrixAlgo.h>
#include <cassert>
void
matrix33_example()
{
Imath::M33f M (Imath::UNINITIALIZED); // uninitialized
M.makeIdentity();
assert (M[0][0] == 1.0f);
assert (M[0][1] == 0.0f);
Imath::M33f Minv = M.inverse();
Imath::M33f R;
assert (R == Imath::identity33f);
R.rotate (M_PI/4);
M = R * M;
Imath::V3f v3 (1.0f, 0.0f, 0.0f);
Imath::V3f r3 = v3 * M;
assert (r3.equalWithAbsError (Imath::V3f (0.707107f, 0.7071070f, 0.0f), 1e-6f));
}
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