Herbert.Voss at FU-Berlin.DE
Thu Aug 27 18:53:52 CEST 2009
Patrice Mégret schrieb:
> In pst-3Dplot, there is the possibility to work in cylindrical coordinates.
> If I have correctly understood, (r,phi,theta) means here r the length of the vector, phi (0<=phi<360) the angle between the x-axis and the projection of the vector on the xy plane and theta (-90<=theta<=90), the angle between the vector and the xy plane.
the cylindrical coordinates are (r,phi,z), radius, angle, height
> Would it be possible to have a second cylindrical system (r,theta1,phi1) in which:
> r is the length of the vector,
> theta (0<=theta<=180) is the angle between the vector and z-axis,
> phi (0<=phi<360) the angle between the x-axis and the projection of the vector on the xy plane
> in order to have the same conventions as in mathematical book related to vector analysis?
do you mean the coordinates, defined by Arfken?
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