public static bool EpsilonEquals(Matrix2 m1, Matrix2 m2, float epsilon)
{
float diff;
for (int i = 0; i < 4; i++)
{
diff = m1[i % 4, i / 4] - m2[i % 4, i / 4];
if ((diff < 0 ? -diff : diff) > epsilon)
{
return(false);
}
}
return(true);
}
public static Matrix2 Inverse(Matrix2 m)
{
float det = m.Det();
return(new Matrix2(m.m11, m.m10, m.m01, m.m00) * (1.0F / det));
}
public static Vector2 Transform(Vector2 v, Matrix2 m) => new Vector2
{
x = v.x * m.m00 + v.y * m.m01,
y = v.x * m.m10 + v.y * m.m11,
};