Determine visibility by verifying the emission and incidence (only checked if configured to do so) angles are positive. Greatly simplifies visibility implementations, and correctly takes into account necessary viewing geometry variables, and removes requirement that the body is modeled as an oblate spheroid.
Determine visibility by verifying the emission and incidence (only checked if configured to do so) angles are positive. Greatly simplifies visibility implementations, and correctly takes into account necessary viewing geometry variables, and removes requirement that the body is modeled as an oblate spheroid.