Checking whether a point is in a polygon or circle

### 26.15.4 Checking whether a point is in a polygon or circle

The is_inside command determines whether or not a point is in a polygon or a circle.

- is_inside takes two arguments:
  - P, a point.
  - C, a polygon or a circle.
- is_inside(P,C) returns 1 if P is inside C (including the boundary) and 0 otherwise.

#### Examples

is_inside(0,circle(-1,1))

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is_inside(2,polygon([1,2-i,3+i]))

1 |  |  |  |  |  |  |  |  |  |

is_inside(1-i,triangle([1,2-i,3+i]))

0 |  |  |  |  |  |  |  |  |  |