Tasmota/lib/NeoPixelBus-2.2.9/examples/NeoPixelGamma/NeoPixelGamma.ino

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// NeoPixelGamma
// This example will display a timed series of color gradiants with gamma correction
// and then without.
// If the last pixel is on, then the colors being shown are color corrected.
// It will show Red grandiant, Green grandiant, Blue grandiant, a White grandiant, and
// then repeat.
//
// This will demonstrate the use of the NeoGamma class
//
//
#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 uint8_t PixelPin = 2; // make sure to set this to the correct pin, ignored for Esp8266
NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
// for esp8266 omit the pin
//NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount);
// uncomment only one of these to compare memory use or speed
//
// NeoGamma<NeoGammaEquationMethod> colorGamma;
NeoGamma<NeoGammaTableMethod> colorGamma;
void DrawPixels(bool corrected, HslColor startColor, HslColor stopColor)
{
for (uint16_t index = 0; index < strip.PixelCount() - 1; index++)
{
float progress = index / static_cast<float>(strip.PixelCount() - 2);
RgbColor color = HslColor::LinearBlend<NeoHueBlendShortestDistance>(startColor, stopColor, progress);
if (corrected)
{
color = colorGamma.Correct(color);
}
strip.SetPixelColor(index, color);
}
// use the last pixel to indicate if we are showing corrected colors or not
if (corrected)
{
strip.SetPixelColor(strip.PixelCount() - 1, RgbColor(64));
}
else
{
strip.SetPixelColor(strip.PixelCount() - 1, RgbColor(0));
}
strip.Show();
}
void setup()
{
strip.Begin();
strip.Show();
}
void loop()
{
HslColor startColor;
HslColor stopColor;
// red color
startColor = HslColor(0.0f, 1.0f, 0.0f);
stopColor = HslColor(0.0f, 1.0f, 0.5f);
DrawPixels(true, startColor, stopColor);
delay(5000);
DrawPixels(false, startColor, stopColor);
delay(5000);
// green color
startColor = HslColor(0.33f, 1.0f, 0.0f);
stopColor = HslColor(0.33f, 1.0f, 0.5f);
DrawPixels(true, startColor, stopColor);
delay(5000);
DrawPixels(false, startColor, stopColor);
delay(5000);
// blue color
startColor = HslColor(0.66f, 1.0f, 0.0f);
stopColor = HslColor(0.66f, 1.0f, 0.5f);
DrawPixels(true, startColor, stopColor);
delay(5000);
DrawPixels(false, startColor, stopColor);
delay(5000);
// white color
startColor = HslColor(0.0f, 0.0f, 0.0f);
stopColor = HslColor(0.0f, 0.0f, 0.5f);
DrawPixels(true, startColor, stopColor);
delay(5000);
DrawPixels(false, startColor, stopColor);
delay(5000);
}