> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Trim Cell Map

## About this Block

**What it does:** Trims Unit Cells from a Cell Map by using an Implicit Body as the filter. The Unit Cells are chosen based on the Fill type and the Cells to remain.

**Common uses:**

* Custom Cell Map shapes.

**Tips:**

* Trims a Cell Map by removing entire Unit Cells. The Unit Cells maintain their size and aren't able to be partially trimmed.
* The Unit Cells to be trimmed are chosen based on the Fill type. The following Fill types are available:
  * **Centroid Inside:** If the Unit Cell's *centroid* is within the Body.
  * **All inside:** The *entire* Unit Cell is within the Body.
  * **All touching:** If *any part* of the Unit Cell is within the Body. The tolerance for this option is 10^-5 m.
* Depending on the Fill type you select, some cells may still be outside the Body.
* The block keeps the Unit Cells based on the Cells to remain input. There are two options:
  * Inside: Keeps all the Unit Cells that satisfy to the selected Fill type.
  * Outside: Keeps all the Unit Cells that don't satisfy to the selected Fill type.
* If **Trim Cell Map** doesn't create the results you are looking for, try using the **Trim Lattice** block.
  * The **Trim Cell Map** block doesn't trim Unit Cells. All Unit Cells are kept whole.
  * The **Trim Lattice** block trims the Lattice, allowing Unit Cells to be trimmed to the specified Body.

![Trim](https://storage.googleapis.com/files-learn/static/ExtendedBlockDocs/trimcellmap.png)

***

Trims a Cell Map with an Implicit Body.

### Inputs

| Name      | Type                                                                 | Description                     |
| --------- | -------------------------------------------------------------------- | ------------------------------- |
| Cell map  | [Cell Map](../../../../block-documentation/types/cell-map)           | Cell Map to trim.               |
| Body      | [Implicit Body](../../../../block-documentation/types/implicit-body) | Implicit Body trimming tool.    |
| Fill type | Volume Lattice Fill Enum                                             | Rule for trimming the Cell Map. |

Centroid inside: Unit Cells whose centroid is inside the Body will remain.

All inside: Unit Cells with all eight corners inside the Body will remain.

All touching: Unit Cells that touch or contain any part of the Body will remain. |
\| Cells to remain | Inside or Outside Enum | Option to keep the cells that are inside or outside of the trimming tool. |

### Outputs

| Type                                                       |
| ---------------------------------------------------------- |
| [Cell Map](../../../../block-documentation/types/cell-map) |