Polar coordinates
two-dimensional coordinate system where each point is determined by a distance from reference point and an angle from a reference direction  | |||||
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English: In a polar coordinate system, a point is refered to by numbers including at least one distance r and one angle θ.
Circular coordinates in the plane (r,θ)
Spherical coordinates (r,θ,φ)
Cylindral coordinates (r,θ,h)
To represent the orientation of an object in space, three angles must be used. This can be viewed as a generalization of the spherical coordinates: ρ is not of interest, but an additional angle ω must be defined; however, this is not the standard way to define an orientation, one uses instead the Euler angles
