可在使用标量表达式的位置调用标量值函数。

Scalar-valued functions can be invoked where scalar expressions are used.

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通过枚举的构造函数允许您将所有元素的值指定为逗号分隔的标量值，如以下两个清单中所示。

Constructors by enumeration allow you to specify the values of all the elements as comma-separated scalar values, as shown in the following two listings.

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现在我们可以创建一个附加的函数，该函数将组合之前提到的函数，并为任何给定的几何图形产生空间填充z曲线上的标量值。

Now we can create an additional function that will combine the before mentioned functions and produce the scalar value on the space filling z-curve for any given geometry.

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