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### 2.7 Swept objects

Many familiar shapes can be generated by sweeping simpler ones through space and considering the resulting path, surface, or volume. `Sketch` implements this idea in the `sweep` command.

      def n_segs 8
      sweep { n_segs, rotate(180 / n_segs, (0,0,0), [0,0,1]) } (1,0,0)

This code sweeps the point (1,0,0) eight times by rotating it 180/8 = 22.5 degrees each time and connecting the resulting points with line segments. The `def` used here is a scalar definition. References to scalars have no enclosing brackets at all.