3D coordinate systems
From DmWiki
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Cartesian coordinates
Cartesian coordinates defines three straight fixed perpendicular lines called axes (usually referred to as X, Y, and Z). A point in 3D can be described by three numbers, which indicate the distance of the point from each axis. This is represented by an ordered triple: (x,y,z).
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Cylindrical coordinates
Cylindrical coordinates are another way of describing a point in space using height, radius and angle. This is represented by an ordered triple: (r,θ,z).
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Spherical coordinates
Spherical coordinates are a third way of describing a point in space using radius and two angle (polar and azimuthal). This is represented by an ordered triple: (r,θ,φ).
