---
title: "Rotation"
url: "https://help.maxon.net/c4d/en-us/Content/html/OEXPLOSIONFX-ID_EXPLOSIONFX_ROTATION.html"
section_path: "Create Menu > Deformer > Explosion FX Object > Rotation"
element_id: "OEXPLOSIONFX"
group_id: "ID_EXPLOSIONFX_ROTATION"
description: "Speed defines the speed of rotation of the clusters. A negative value reverses the direction of rotation."
---

## Rotation

### Speed

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

Speed defines the speed of rotation of the clusters. A negative value reverses the direction of rotation.

### Decay

Parameter ID: `EXPLOSIONFX_WSPEED_FALLOFF` · Range: [0..100%]

Decay controls falloff for the Rotation value. 0% means no falloff, 100% means the Rotation value falls to 0 as the clusters reach the edge of the blast range.

### Variation

Parameter ID: `EXPLOSIONFX_WSPEED_RANDOM` · Range: [0..100%]

Use Variation to vary the rotation for each cluster.

### Rotation Axis

Parameter ID: `EXPLOSIONFX_ROTACHSE`

By default, each cluster rotates about its center of gravity. Here, you can make clusters rotate around the X axis, Y axis or Z axis only of the world system. This is useful for special effects, logo animation and so on.

### Variation

Parameter ID: `EXPLOSIONFX_ROTACHSE_RANDOM` · Range: [0..100%]

Use Variation to tumble the clusters.