quadMapSupport

quadMapSupport.computeCamFOVBox(parentBody, spiceObject, scObject, cam)[source]

This method projects a camera FOV onto the surface of a reference ellipsoid. All rays which intersect the ellipsoid are added to the output list, which is formatted with the intersection points as: [x1 y1 z1 x2 y2 … z4]. If all four camera rays intersect, this list can be used to generate a QuadMap in Vizard to see the region. Otherwise, the partial list is returned for the user to handle.

Parameters:

  • parentBody – Parent grav body, containing radEquator and radiusRatio which define the reference ellipsoid

  • spiceObject – SPICE object

  • scObject – Spacecraft instance

  • cam – vizInterface.StdCameraSettings or messaging.CameraConfigMsgPayload

Returns:

FOVBox, list of camera FOV rays which intersect the reference ellipsoid

Return type:

Up to 12-element double-list

quadMapSupport.computeRectMesh(parentBody, latBounds, lonBounds, maxAngWidth)[source]

This method creates a polar/rectangular mesh on the surface of a reference ellipsoid.

Parameters:

  • parentBody – Parent grav body, containing radEquator and radiusRatio which define the reference ellipsoid.

  • latBounds – [deg] Latitude bounds

  • lonBounds – [deg] Longitude bounds

  • maxAngWidth – [deg] Maximum angular width for sub-regions

Returns:

r_GP_P, position vector of the location G relative to parent body frame P in P frame components

Return type:

3-element list

quadMapSupport.subdivideFOVBox(parentBody, FOVBox, fieldOfViewSubdivs)[source]

This method subdivides a complete FOVBox into N x N regions. This is helpful for wrapping a rectangular region over a convex surface. Uses bi-linear interpolation.

Parameters:

  • parentBody – Parent grav body, containing radEquator and radiusRatio which define the reference ellipsoid.

  • FOVBox – FOV corners in fixed-frame, defined as [x1, y1, z1, x2, … , z4]

  • fieldOfViewSubdivs – N, number of vertical and horizontal subdivisions to mesh

Returns:

vertices, interpolated FOVBox in fixed-frame to include higher-resolution quads

Return type:

N x N x 4 double-list