surface
Computes the Cartesian coordinates of a geographic location on the terrain surface. If the latitude and longitude are outside the geometric surface modeled by this terrain, this returns false and does not modify the result argument.
Return
true if the geographic location is on the terrain surface, otherwise false
Parameters
latitude
the location's latitude
longitude
the location's longitude
result
a pre-allocated Vec3 in which to store the computed X, Y and Z Cartesian coordinates