#include #include void matrix22_example() { Imath::M22f M (Imath::UNINITIALIZED); // uninitialized M.makeIdentity(); assert (M[0][0] == 1.0f); assert (M[0][1] == 0.0f); Imath::M22f Minv = M.inverse(); Imath::M22f R; assert (R == Imath::identity22f); R.rotate (M_PI/4); M = R * M; Imath::V2f v2 (1.0f, 0.0f); Imath::V2f r2 = v2 * M; assert (r2.equalWithAbsError (Imath::V2f (0.707107f, 0.707107f), 1e-6f)); }