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1·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 regular tetrahedron 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.

建立地质构造三维可视化模型的典型方法包括三维规则网格法、TIN表面法、四面体法以及综合法。