---
title: "Shapes"
url: "https://help.maxon.net/c4d/en-us/Content/html/10630.html"
section_path: "Animate > Timeline > Menu > Functions > Shapes"
description: "Creates a ridge-shaped curve consisting of four points. The shape originates from the two center points and will lie at a position of 100 by default. The …"
---

# Shapes

Ridge

Creates a ridge-shaped curve consisting of four points. The shape originates from the two center points and will lie at a position of 100 by default. The corresponding track must be selected.

Ramp up

Ramp down

Creates a curve that ascends and descends linearly from 0 to 100 between the first and last key of a given track. The corresponding track must be selected.

Formula...

Selecting this option will open a small dialog window in which you can enter simple or complex mathematical functions with which just about any imaginable F-Curve can be created. The Keys setting defines the number of in-betweens. The variable is **t**, which runs from 0 (sequence start) to 1 (sequence end). Angles for trigonometric functions must be given in radians. The corresponding track must be selected.

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

> **Tip:** The function arguments must always be placed in parenthesis. The number of open parenthesis must equal the number of close parenthesis (e.g., sin(sqr(exp(pi))).

# Example:

If you enter sin(t\*2\*pi) for **s(t)** and 4 for **Keys**, the following curve will result:

![Image: 012820.jpg](https://help.maxon.net/c4d/en-us/Content/Resources/Images/012820.jpg)