st-anything/lib/NeoPixelBus_by_Makuna/examples/bitmaps/NeoPixelDibTest/NeoPixelDibTest.ino

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2023-03-11 14:11:03 +00:00
// NeoPixelDibTest
// This example will provide a shader class to the NeoPixelDib that will dim and brighten
// the pixels that are in the Dib (Device Independant Bitmap)
//
#include <NeoPixelBus.h>
const uint16_t PixelCount = 64; // set this to the size of your strip
const uint8_t PixelPin = 2; // make sure to set this to the correct pin, ignored for Esp8266
// three element GRB pixels, change to your needs
NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, PixelPin);
// the DIB object, using RgbColor and initialized with the same number of pixels as our strip
NeoDib<RgbColor> image(PixelCount);
const RgbColor BrightRed(255, 0, 0);
const RgbColor BrightGreen(0, 255, 0);
const RgbColor BrightBlue(0, 0, 255);
const RgbColor BrightYellow(255, 255, 0);
const RgbColor BrightCyan(0, 255, 255);
const RgbColor BrightPurple(255, 0, 255);
const RgbColor DarkRed(32, 0, 0);
const RgbColor DarkGreen(0, 32, 0);
const RgbColor DarkBlue(0, 0, 32);
const RgbColor DarkYellow(32, 32, 0);
const RgbColor DarkCyan(0, 32, 32);
const RgbColor DarkPurple(32, 0, 32);
const RgbColor White(255);
const RgbColor Black(0);
// define a custom shader object that provides brightness support
// based upon the NeoShaderBase
class BrightnessShader : public NeoShaderBase
{
public:
BrightnessShader():
NeoShaderBase(),
_brightness(255) // default to full bright
{}
// required for a shader object, it will be called for
// every pixel
RgbColor Apply(uint16_t index, RgbColor original)
{
// we don't care what the index is so we ignore it
//
// to apply our brightness shader, modify the original color and return the color we want
// blend from black (_brightness == 0.0) to the original color (_brightness == 1.0)
return RgbColor::LinearBlend(Black, original, (float)_brightness / 255.0f);
}
// provide an accessor to set brightness
void setBrightness(uint8_t brightness)
{
_brightness = brightness;
Dirty(); // must call dirty when a property changes
}
// provide an accessor to get brightness
uint8_t getBrightness()
{
return _brightness;
}
private:
uint8_t _brightness;
};
// create an instance of our shader object
BrightnessShader shader;
// some dimming tracking variables and settings
int8_t delta;
void setup()
{
Serial.begin(115200);
while (!Serial); // wait for serial attach
Serial.println();
Serial.println("Initializing...");
Serial.flush();
// this resets all the neopixels to an off state
strip.Begin();
strip.Show();
// dibs do not default to any color,
// so clear it to black if you aren't going to draw
// into every pixel
image.ClearTo(Black);
// draw a pattern into the image
uint8_t index = 0;
image.SetPixelColor(index++, DarkRed);
image.SetPixelColor(index++, DarkYellow);
image.SetPixelColor(index++, DarkGreen);
image.SetPixelColor(index++, DarkCyan);
image.SetPixelColor(index++, DarkBlue);
image.SetPixelColor(index++, DarkPurple);
image.SetPixelColor(index++, Black);
image.SetPixelColor(index++, Black);
image.SetPixelColor(index++, BrightRed);
image.SetPixelColor(index++, BrightYellow);
image.SetPixelColor(index++, BrightGreen);
image.SetPixelColor(index++, BrightCyan);
image.SetPixelColor(index++, BrightBlue);
image.SetPixelColor(index++, BrightPurple);
Serial.println();
Serial.println("Running...");
delta = -1; // start by dimming downward
}
void loop()
{
// we increment by delta every 30ms
delay(30);
// update the brightness in shader
//
uint8_t brightness = shader.getBrightness();
// check if we flip directions
if (brightness == 0)
{
delta = 1; // increment
}
else if (brightness == 255)
{
delta = -1; // decrement
}
// modify and apply
brightness += delta;
shader.setBrightness(brightness);
Serial.println(brightness);
// render the image using the shader and then call Show()
// these two should be called together in order
//
// need to provide the type of color feature for the strip and
// the type of our custom shader
image.Render<NeoGrbFeature, BrightnessShader>(strip, shader);
strip.Show();
}