#level1_periodicSignalsExample

Learning Objectives

This openFrameworks Example is designed to demonstrate how to draw a variety of periodic signals, a signal that completes a pattern within a measurable timeframe using one of the following: trig functions, modulo, ofRandomn, or a varient of the noise function.

In this example, pay attention to the following code:

• Trig function sin(angle) that uses angles and returns values between -1 and 1 (see the trigonometryExample for more on trig functions)
• ofNoise(), calculates a randomn value between 0 and 1.0 based on perlin noise
• ofSignedNoise(), calculates a random value between -1.0 and 1.0 based on perlin noise
• ofRandom(value1, value2), calculates a random value between value1 and value2. ofRandom() is different from noise function in that the values returned are completely randomn. noise functions are psuedo random with easing between values.
• fmod(), returns the remainder after dividng one number by another known as the modulo operator. This is the same as using %; however, it is for floats.

Expected Behavior

When launching this app, you should see:

• 8 trails that are moving horizontally,
• each trail has a different periodic signal based on the respective labeled functions

Instructions for use:

• Use the top slider to adjust the "y amnt" also known as the amplitude
• Use the middle slider to adjust "x speed" of each trail
• Use the bottom slider to adjust the frequency of each periodic signal
• Note that ofRandom(value1, value2) cannot be dependent on time or frequency

Other classes used in this file

This Example uses ofxSimpleSlider class, so that the "y amnt", "x speed", and "frequency" can be adjusted once the app is running.