The class S2Grid represent spherical grids. The central difference to a simple list of vector3d is that S2Grid provides more efficient methods for finding the closes points in the grid with respect to a given direction.
Syntax
% regular grid with fixed polar and azimuthal spacing
S2G = regularS2Grid('resolution',5*degree)
S2G = regularS2Grid('theta',(0:5:80)*degree,'rho',(0:5:355)*degree)% regular grid optimized for plotting
S2G = plotS2Grid('resolution',1.5*degree,'upper')% equispaced nodes with given resolution
S2G = equispacedS2Grid('resolution',5*degree)Options
| points | [nrho,ntheta] number of points |
| resolution | resolution of a equispaced grid |
| theta | polar angle |
| rho | azimuthal angle |
| minRho | starting rho angle (default 0) |
| maxRho | maximum rho angle (default 2*pi) |
| minTheta | starting theta angle (default 0) |
| maxTheta | maximum theta angle (default pi) |
Flags
| lower, uper, complete | restrict hemisphere |
| antipodal | include antipodal symmetry |
| no_center | ommit point at center |
| restrict2minmax | restrict margins to min / max |
Example
S2G = equispacedS2Grid('resolution',5*degree,'maxTheta',70*degree)
plot(S2G)S2G = S2Grid
size: 1 x 577
resolution: 5°