DE wrote:
hi i'm new to boost so please don't blame me
the question is do you need a matrix library which allows you to write clear, human readable code like
dV = (1/m)*force + transpose(A)*g - cross_product(omega, V) //here dV is a derivative of velocity, m is (scalar) mass //A is transition matrix and //g is gravity acceleration vector //omega is angular velocity and V is velocity vector itself //force is defined in body space (e.g. aerodynamics and thrust)
that is an expression of newton's 2nd law (or if you like 'change in momentum' law: d(m*V)/dt = d_local(m*V)/dt + (omega)x(m*V) = sum_of(forces) as you can see so far i'm a math nerd) of course it must be implemented through lazy evaluation technique (which immediately implies expression templates NT2 is a library of mine which aims at this. It's not complete yet even if an old prototype is available on sourceforge.
-- ___________________________________________ Joel Falcou - Assistant Professor PARALL Team - LRI - Universite Paris Sud XI Tel : (+33)1 69 15 66 35