# Curve Regions

From TOI-Pedia

## Introduction

**LEVEL: BEGINNER**

In the Grasshopper building geometry can be quite similar to Rhino, with the exception that you will have to define every step in the building process. This makes it a bit more complex, but also very powerful. Curve regions is an option which is similar to curve boolean operations or curve cutting in Rhino. It allows you to combine multiple curves in a single curve. This can be quite helpful in creating complex curves within Grasshopper.

## Curve Regions

The option of Curve Sections uses a boolean operation. It can use:

- Subtract - Subtracts one shape of another
- Union - Combines two shapes together into one shape
- Intersect - Defines the overlapping part of two shapes

To subtract curves

To find the difference of two curves

To union curves