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Since	21.0

Converts a 3D cartesian coordinate to its corresponding geodetic coordinate representation. In Houdini, geodetic coordinates are a type of spherical coordinate represented as a Vector3 such that:

• The first component is the longitude (in radians).

• The second component is the latitude (in radians).

• The third component is the height (the radius of the sphere).

Longitude is the horizontal angular offset from the prime meridian, which is directed at +Z axis. It has a range of (-π, π) from west to east about the +Y axis with the prime meridian representing the 0 offset. Latitude is the vertical angular offset from the equator, represented by the XZ plane. It has a range of (-π/2, π/2) from south to north with the equator representing the 0 offset.

Geodetic coordinates can be useful for determining the spatial location of a point in relation to the origin. For example, given a character centered on the origin and facing the +Z direction, geodetic coordinates can be used to determine if a point is to the left or right of the character, above or below, and in front of or behind the character.

Location	Longitude	Latitude
Left	Longitude < 0
Right	Longitude > 0
Front	-π/2 < Longitude < π/2
Back	-π/2 > Longitude > π/2
Below		Latitude < 0
Above		Latitude > 0

Inputs ¶

cartesian: Vector3

The 3D cartesian coordinate: X, Y, Z.

Outputs ¶

geodetic: Vector3

The converted geodetic coordinate: longitude (radians), latitude (radians), height.

See also

GeodeticToCartesian CartesianToPolar CartesianToSpherical PolarToCartesian SphericalToCartesian