http://www.mvps.org/DirectX/articles/math/dot/index.htm

Is it possible to do dot product on a vector with matrices in D3DX9?

I am trying to convert this project into C++ equivalence...

https://github.com/unr-arl/DubinsAirplane

In the python code

np.dot(rotz(pi/2), np.array([cos(anglstart), sin(anglstart), 0]).T)

It is trying to compute the dot product of a rotation matrix around z axis and dot with

a column vector...

https://msdn.microsoft.com/en-us/library/windows/desktop/bb205508(v=vs.85).aspx

The D3DXVec3Dot only works with dotting two vectors together?

Thanks

Jack

Just to make sure.

Because my game needs my vehicles to pathfind on ramps,

I am not sure if 3D dubins is needed when calculating subpaths

on ramps....

Because in flat ground case, 2D dubins is needed,

Is 3D case similiar to this?

Thanks

Jack

The dot/inner product is define for vectors ( in the broadest sense ) NOT matrices. Are you referring to matrix-vector? Although one can think of a matrix-vector multiplication as a sequence of dot-product between the column/row vectors of the matrix with the input vector.

Guess what. I just discovered there is a C++ version of NumPy out there.

It is in here

https://github.com/ndarray/Boost.NumPy