This paper tries to generalize the throwing objects from the one dimension pin to the convex curve in two dimension, and even the three dimensional regulartetrahedron and regular hexahedron .
在蒲丰投针问题的基础上，把投掷物由一维的针推广到二维的凸曲线，三维的正四面体、正六面体；
2
The typical 3d visually modeling methods of geological structure include the 3d regular network model, the TIN surface model, the tetrahedron elements model and the integration model.