Cylinder.d_Phi_z¶

Cylinder.d_Phi_z(r, phi, z)¶

Derivative of the surface function considering the z-axis

\[\begin{split}\frac{\partial\Phi}{\partial z}(r,\phi,z)= \begin{bmatrix}0\\0\\1\end{bmatrix}\end{split}\]

with radius \(r\), polar angle \(\phi\) and cylinder length \(z\).

Parameters:

rfloat: Radius
phifloat: Polar angle
zfloat: Distance ins z-axis

Returns:

poslist: Cartesian coordinates for given polar coordinates