Matrix3x3f Matrix3x3f::IdentityMatrix()
{
Matrix3x3f identity;
identity.SetIdentity();
return identity;
}
Matrix3x3f Matrix3x3f::TranslateMatrix(const Vec2f translation)
{
Matrix3x3f translateMatrix;
translateMatrix.SetIdentity();
translateMatrix.Set(2, 0, translation.x);
translateMatrix.Set(2, 1, translation.y);
return translateMatrix;
}
Matrix3x3f Matrix3x3f::ScaleMatrix(const Vec2f &scale)
{
Matrix3x3f scaleMatrix;
scaleMatrix.SetIdentity();
scaleMatrix.Set(0, 0, scale.x);
scaleMatrix.Set(1, 1, scale.y);
return scaleMatrix;
}
Matrix3x3f Matrix3x3f::RotateMatrix(float angle)
{
float cosOfAngle = cosf(angle);
float sinOfAngle = sinf(angle);
Matrix3x3f rotationMatrix;
rotationMatrix.SetIdentity();
rotationMatrix.Set(0, 0, cosOfAngle);
rotationMatrix.Set(1, 0, sinOfAngle);
rotationMatrix.Set(0, 1, -sinOfAngle);
rotationMatrix.Set(1, 1, cosOfAngle);
return rotationMatrix;
}