Construction of interactive geometric model of outside surface of a spacecraft

In this paper author introduces the approach to construction of interactive model of external spacecraft surface which is used in applications related to computing integrals on surface of a spacecraft, finding visible parts of surface taking in account its each other overlapping, finding projection of surface to arbitrary plane using given projection operator. In current approach surface of a spacecraft is constructed of number geometric primitives. Introduced method makes possible to turn on/off parts of the model, modeling of movable elements (like antennas, manipulators, solar batteries). This approach was implemented as a program module, which is used in number of mathematical modeling software: modeling of aerodynamic force and the moments affecting on a spacecraft, light pressure force and moments, modeling of operational behavior of solar batteries of spacecraft, modeling of thermal conditions of a spacecraft, modeling of electromagnetic waves diffraction on spacecraft surface. In this paper an example of using geometric model to compute aerodynamic force and moment is introduced.