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//! Spherical-polar dimensions. /// Spherical-polar coordinate system. pub enum Spherical { /// Radial distance. [0 : inf] Rho, /// Angle. [0 : Pi] Theta, /// Azimuthal angle. [0 : 2*Pi] Phi, } /// Spherical-polar and plane-polar rho convenience indexing constant. pub const RHO: usize = Spherical::Rho as usize; /// Spherical-polar and plane-polar theta convenience indexing constant. pub const THETA: usize = Spherical::Theta as usize; /// Spherical-polar phi convenience indexing constant. pub const PHI: usize = Spherical::Phi as usize;