- "SemimajorAxis" defines "A" in the spheroid equation above
- There is no "B" to define because it is equivalent to "A" by definition
- "SemiminorAxis" defines "C" in the spheroid equation above
Oblate Spheroid Class setting C
6 views (last 30 days)
Hello, I am trying to create an oblate spheroid object in matlab. I would like to specify certain parameters, more specifically, A,B,C of the ellipsoid. I can specify A,B directly using SemiminorAxis and SemimajorAxis, however, I am not sure how to set C.
Please tell me if there is any way I can specify this exactly.
Brian Neiswander on 14 Aug 2015
Given the general equation of an ellipsoid:
(x/A)^2 + (y/B)^2 + (z/C)^2 = 1
The spheroid is a special case of an ellipsoid where "A" is equal to "B":
(x+y)^2/A^2 + (z/C)^2 = 1
This means that the spheroid is symmetric about its polar axis. When defining an "oblateSpheroid" object in MATLAB, the properties:
You can check the NASA SPICE Toolkit as it may provide some functionality for "triaxial" ellipsoids.
See below for more reference on ellipsoids and spheroids.