The code presented on this page can be downloaded or found in the Arduino examples menu under Examples → SpinWearables → Animations_and_Patterns → Smoother_Blink.
In our animations and patterns lesson we describe how an animation can be created by instructing a computer to make a particular drawing dependent on a single number, the current time. The first example we considered, Simple_Blink, has somewhat abrupt change from bright to dark. Here we use the triangularWave function to make the pulsing pattern more pleasant and less abrupt. Some pieces of code are the same as in previous examples from this series on coded animations, We do not comment them as extensively here, but consult the Simple_Blink example if you need a refresher.
#include "SpinWearables.h"
using namespace SpinWearables;
void setup() {
SpinWheel.begin();
}
void loop() {
int t = millis();
int t_repeating = t % 2500;The triangularWave function has a period of 256 and provides for a smooth ramp-up and ramp-down.
int b = triangularWave(t_repeating / 10);The next function takes three arguments: The red, green, and blue components of the color we desire. We are mixing only red and blue, setting green to zero.
SpinWheel.setLargeLEDsUniform(b, 0, b);
SpinWheel.drawFrame();
}