st-anything/lib/NeoPixelBus_by_Makuna/examples/animations/NeoPixelRotateLoop/NeoPixelRotateLoop.ino

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2023-03-11 14:11:03 +00:00
// NeoPixelFunLoop
// This example will move a trail of light around a series of pixels.
// A ring formation of pixels looks best.
// The trail will have a slowly fading tail.
//
// This will demonstrate the use of the RotateRight method.
//
#include <NeoPixelBus.h>
#include <NeoPixelAnimator.h>
const uint16_t PixelCount = 16; // make sure to set this to the number of pixels in your strip
const uint16_t PixelPin = 2; // make sure to set this to the correct pin, ignored for Esp8266
const uint16_t AnimCount = 1; // we only need one
const uint16_t TailLength = 6; // length of the tail, must be shorter than PixelCount
const float MaxLightness = 0.4f; // max lightness at the head of the tail (0.5f is full bright)
NeoGamma<NeoGammaTableMethod> colorGamma; // for any fade animations, best to correct gamma
NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
// for esp8266 omit the pin
//NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount);
NeoPixelAnimator animations(AnimCount); // NeoPixel animation management object
void SetRandomSeed()
{
uint32_t seed;
// random works best with a seed that can use 31 bits
// analogRead on a unconnected pin tends toward less than four bits
seed = analogRead(0);
delay(1);
for (int shifts = 3; shifts < 31; shifts += 3)
{
seed ^= analogRead(0) << shifts;
delay(1);
}
// Serial.println(seed);
randomSeed(seed);
}
void LoopAnimUpdate(const AnimationParam& param)
{
// wait for this animation to complete,
// we are using it as a timer of sorts
if (param.state == AnimationState_Completed)
{
// done, time to restart this position tracking animation/timer
animations.RestartAnimation(param.index);
// rotate the complete strip one pixel to the right on every update
strip.RotateRight(1);
}
}
void DrawTailPixels()
{
// using Hsl as it makes it easy to pick from similiar saturated colors
float hue = random(360) / 360.0f;
for (uint16_t index = 0; index < strip.PixelCount() && index <= TailLength; index++)
{
float lightness = index * MaxLightness / TailLength;
RgbColor color = HslColor(hue, 1.0f, lightness);
strip.SetPixelColor(index, colorGamma.Correct(color));
}
}
void setup()
{
strip.Begin();
strip.Show();
SetRandomSeed();
// Draw the tail that will be rotated through all the rest of the pixels
DrawTailPixels();
// we use the index 0 animation to time how often we rotate all the pixels
animations.StartAnimation(0, 66, LoopAnimUpdate);
}
void loop()
{
// this is all that is needed to keep it running
// and avoiding using delay() is always a good thing for
// any timing related routines
animations.UpdateAnimations();
strip.Show();
}