空间角度的精确计算

本文给出空间角度精确计算的一种方法。即利用投影几何将有关空间角度的立体图形建立起来,然后用球面三角形和三面角巧妙地与上述图形相结合,最后选用恰当的球面三角形公式按已知条件求出所需角度。这种计算方法的特点是精度高,所建立的立体图形简洁明快、灵活多变、适应性强。为提高效率,也可编成程序,用计算机运算。

Accurate Computation of the Space Angle

A method is given in this article, that is, you can use projective grometryto build up cubic figures concerning space angle. Then you can have the abovementioned figures combine with spherical triangle and three--plane angle inge-niously, and then you can select the proper formulae of spherical trigonometryto get reguired angle in the light of given conditions. Higher accuracy is cha-racteristic of this method and cubic figures built in the method show a lucid,flexible and adaptable character. To increase efficiency of computation, you cancompute it on a computer after you draw up the program for it.