---
title: "Effector"
url: "https://help.maxon.net/c4d/en-us/Content/html/OEFORMULA-ID_MG_BASEEFFECTOR_GROUPEFFECTOR.html"
section_path: "MoGraph > Effectors > Formula > Effector"
element_id: "OEFORMULA"
group_id: "ID_MG_BASEEFFECTOR_GROUPEFFECTOR"
description: "Use this setting to adjust the overall strength of the effect. Values of less than 0% and greater than 100% can be entered."
---

## Effector

### Strength

Parameter ID: `ID_MG_BASEEFFECTOR_STRENGTH` · Range: [-∞..+∞%]

Use this setting to adjust the overall strength of the effect. Values of less than 0% and greater than 100% can be entered.

### Selection

Parameter ID: `ID_MG_BASEEFFECTOR_SELECTION`

![Image: 018406.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/018406.jpg)\
On the left, a Step effector is shown without selection; on the right, it is shown with a selection applied. A Step effector was chosen here as an example of selection; otherwise, selections work differently depending on the type of effector.

A [MoGraph Selection](https://help.maxon.net/c4d/en-us/Content/html/TMGSELECTION.html.md) or [MoGraph Weightmap](https://help.maxon.net/c4d/en-us/Content/html/TMGWEIGHT.html.md) tag can be dragged into this field or placed automatically by selecting a Cloner object and an existing MoGraph selection/weighting, and creating an Effector.

The Effector will then work as follows, depending on the tag’s settings:

- **MoGraph Selection** tag: Will only affect the clones belonging to the selection.
- **MoGraph Weightmap** tag: The clone weighting (values between 0% and 100%) saved in the tag will be multiplied with the effector strength.

![Image: subgroup.gif](https://help.maxon.net/c4d/en-us/Content/Resources/Images/subgroup.gif)\
Min/Max

### Maximum

Parameter ID: `ID_MG_BASEEFFECTOR_MAXSTRENGTH` · Range: [-∞..+∞%]

Use these settings to increase or decrease internal range values.

Note also the **Remapping** settings for the Layers in the Field list. Use this Field functionality as your preferred method since it’s more powerful and easier to understand in combination with other Layers.

### Minimum

Parameter ID: `ID_MG_BASEEFFECTOR_MINSTRENGTH` · Range: [-∞..+∞%]

Use these sliders to adjust the Effector's range of influence. Values less than 0% or greater than 100% can be defined.

Let's assume you have entered the following formula: **t\*px**. If **Minimum** and **Maximum** were also set to 0% and 100%, respectively, extreme values would quickly be reached. It would, therefore, be advisable to set **Maximum** to 1% (or even much smaller, depending on your scene or the desired result).

### Formula

Parameter ID: `MGFORMULAEFFECTOR_STRING`

The following variables can be used when writing a formula:

- px, py, pz: X-, Y- or Z-coordinates
- rx, ry, rz: Rotation for each dimension
- sx, sy, sz: Scaling for each dimension
- u,v,w: The (internal) UV-values for each clone
- id: The individual clone number (all clones are numbered sequentially, beginning with **0**)
- count: The clone number
- falloff: The falloff value for each clone
- t: Animation time, i.e., if this variable is added to the formula, it will automatically be animated. This setting uses a slider as multiplier.
- f: The frequency. This setting uses a slider as a multiplier.

![Image: 006222.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/006222.jpg)\
Varying **t** adjusts the animation speed, varying **f** varies the spatial frequency.

A list with possible formulas can be found [here](https://help.maxon.net/c4d/en-us/Content/html/6194.html.md).

![Image: subgroup.gif](https://help.maxon.net/c4d/en-us/Content/Resources/Images/subgroup.gif)\
Variables

### px,py,pz - Position

Parameter ID: `MGFORMULAEFFECTOR_HELP02`

### rx,ry,rz - Rotation

Parameter ID: `MGFORMULAEFFECTOR_HELP03`

### sx,sy,sz - Scale

Parameter ID: `MGFORMULAEFFECTOR_HELP04`

### u,v,w - UVW

Parameter ID: `MGFORMULAEFFECTOR_HELP05`

### id - Object Index

Parameter ID: `MGFORMULAEFFECTOR_HELP06`

### count - Object Count

Parameter ID: `MGFORMULAEFFECTOR_HELP07`

### falloff - Falloff weight

Parameter ID: `MGFORMULAEFFECTOR_HELP08`

### t - Project Time

Parameter ID: `MGFORMULAEFFECTOR_TIME` · Range: [-∞..+∞]

### f - Frequency

Parameter ID: `MGFORMULAEFFECTOR_FREQ` · Range: [-∞..+∞]