PolarΒΆ

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This section is used to specify the evaluation points by their polar coordinates in a spherical coordinate system. The spherical coordinate system (r, \vartheta, \varphi) relates to the Cartesian coordinate system by

\begin{eqnarray*}
 x & = & r\sin(\vartheta)\cos(\varphi), \\
 y & = & r\sin(\vartheta)\sin(\varphi), \\
 z & = & r\cos(\vartheta)
 \end{eqnarray*}

A single radius r is fixed for all evaluation points by setting Radius. Hence, all evaluation points are located on a sphere.

Warning

When defining a rotation (see Rotation), the defined evaluation points refer to the rotated coordinate system.