Numerical computation of view factor of complicated configuration

The formulas of view factor computation of ray uniform distribution on radiant semi-sphere were deduced.View factors were computed by combining finite element method(FEM) and ray uniform distribution according to the position of surface cells.Triangle grid was used to express outline of complicated configuration and judge shading.It was demonstrated by a comparison with FEM and Monte Carlo method that the computing precision and efficiency of this method is higher and shading judgment method is correct and highly efficient.