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**Guide Section:** Diagramming | **EASAP Tree:** DIAGRAM LIST

**CURVE** is used to create curves. A **CURVE** is specified by a series of points and a curve type. A minimum of two points is required in the list to at least produce a straight line. The following curve types are available for selection using the **Curve Type:** parameter:

- Bezier
- Bezier without corners
- B-Spline
- Catmull-Rom
- Closed Natural Cubic
- Natural Cubic

When using the first three curve types (Bezier, Bezier without corners and B-Spline), the curve drawn will not necessarily pass through all the points specified. However, curves drawn using the final three curve types (Catmull-Rom, Closed Natural Cubic and Natural Cubic) will pass through all points specified.

**Tip:** The use of DORs in the **Points:** parameter referencing **LIST**'s containing X and Y coordinate values is a powerful way to define a **CURVE**. These **LIST**'s are typically generated using an INTERLEAVE.

CURVE | |
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Essential Parameters: | |

Points: | List of curve point coordinates: x1,y1,x2,y2,… Two points are minimum requirement. DORS and Expressions allowed |

Line Style: | Select line style from list |

Optional Parameters: | |

Show if: | Logical expression, if FALSE then curve NOT shown, else default→TRUE |

Transform: | Select one or more transforms from list. Order selected is order applied. |

Curve Type: | Type of curve to be drawn (default→CATMULLROM, BEZIER, BEZIER WITHOUT CORNERS, BSPLINE, CLOSED NATURAL CUBIC, NATURAL CUBIC) |

Delimiter: | Character to act as the delimiter in DORs in Points: parameter. |