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Diffstat (limited to 'Библиотеки/FastLED-master/examples/Fire2012WithPalette/Fire2012WithPalette.ino')
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diff --git a/Библиотеки/FastLED-master/examples/Fire2012WithPalette/Fire2012WithPalette.ino b/Библиотеки/FastLED-master/examples/Fire2012WithPalette/Fire2012WithPalette.ino new file mode 100644 index 0000000..e65a87f --- /dev/null +++ b/Библиотеки/FastLED-master/examples/Fire2012WithPalette/Fire2012WithPalette.ino @@ -0,0 +1,164 @@ +#include <FastLED.h> + +#define LED_PIN 5 +#define COLOR_ORDER GRB +#define CHIPSET WS2811 +#define NUM_LEDS 30 + +#define BRIGHTNESS 200 +#define FRAMES_PER_SECOND 60 + +bool gReverseDirection = false; + +CRGB leds[NUM_LEDS]; + +// Fire2012 with programmable Color Palette +// +// This code is the same fire simulation as the original "Fire2012", +// but each heat cell's temperature is translated to color through a FastLED +// programmable color palette, instead of through the "HeatColor(...)" function. +// +// Four different static color palettes are provided here, plus one dynamic one. +// +// The three static ones are: +// 1. the FastLED built-in HeatColors_p -- this is the default, and it looks +// pretty much exactly like the original Fire2012. +// +// To use any of the other palettes below, just "uncomment" the corresponding code. +// +// 2. a gradient from black to red to yellow to white, which is +// visually similar to the HeatColors_p, and helps to illustrate +// what the 'heat colors' palette is actually doing, +// 3. a similar gradient, but in blue colors rather than red ones, +// i.e. from black to blue to aqua to white, which results in +// an "icy blue" fire effect, +// 4. a simplified three-step gradient, from black to red to white, just to show +// that these gradients need not have four components; two or +// three are possible, too, even if they don't look quite as nice for fire. +// +// The dynamic palette shows how you can change the basic 'hue' of the +// color palette every time through the loop, producing "rainbow fire". + +CRGBPalette16 gPal; + +void setup() { + delay(3000); // sanity delay + FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS).setCorrection( TypicalLEDStrip ); + FastLED.setBrightness( BRIGHTNESS ); + + // This first palette is the basic 'black body radiation' colors, + // which run from black to red to bright yellow to white. + gPal = HeatColors_p; + + // These are other ways to set up the color palette for the 'fire'. + // First, a gradient from black to red to yellow to white -- similar to HeatColors_p + // gPal = CRGBPalette16( CRGB::Black, CRGB::Red, CRGB::Yellow, CRGB::White); + + // Second, this palette is like the heat colors, but blue/aqua instead of red/yellow + // gPal = CRGBPalette16( CRGB::Black, CRGB::Blue, CRGB::Aqua, CRGB::White); + + // Third, here's a simpler, three-step gradient, from black to red to white + // gPal = CRGBPalette16( CRGB::Black, CRGB::Red, CRGB::White); + +} + +void loop() +{ + // Add entropy to random number generator; we use a lot of it. + random16_add_entropy( random()); + + // Fourth, the most sophisticated: this one sets up a new palette every + // time through the loop, based on a hue that changes every time. + // The palette is a gradient from black, to a dark color based on the hue, + // to a light color based on the hue, to white. + // + // static uint8_t hue = 0; + // hue++; + // CRGB darkcolor = CHSV(hue,255,192); // pure hue, three-quarters brightness + // CRGB lightcolor = CHSV(hue,128,255); // half 'whitened', full brightness + // gPal = CRGBPalette16( CRGB::Black, darkcolor, lightcolor, CRGB::White); + + + Fire2012WithPalette(); // run simulation frame, using palette colors + + FastLED.show(); // display this frame + FastLED.delay(1000 / FRAMES_PER_SECOND); +} + + +// Fire2012 by Mark Kriegsman, July 2012 +// as part of "Five Elements" shown here: http://youtu.be/knWiGsmgycY +//// +// This basic one-dimensional 'fire' simulation works roughly as follows: +// There's a underlying array of 'heat' cells, that model the temperature +// at each point along the line. Every cycle through the simulation, +// four steps are performed: +// 1) All cells cool down a little bit, losing heat to the air +// 2) The heat from each cell drifts 'up' and diffuses a little +// 3) Sometimes randomly new 'sparks' of heat are added at the bottom +// 4) The heat from each cell is rendered as a color into the leds array +// The heat-to-color mapping uses a black-body radiation approximation. +// +// Temperature is in arbitrary units from 0 (cold black) to 255 (white hot). +// +// This simulation scales it self a bit depending on NUM_LEDS; it should look +// "OK" on anywhere from 20 to 100 LEDs without too much tweaking. +// +// I recommend running this simulation at anywhere from 30-100 frames per second, +// meaning an interframe delay of about 10-35 milliseconds. +// +// Looks best on a high-density LED setup (60+ pixels/meter). +// +// +// There are two main parameters you can play with to control the look and +// feel of your fire: COOLING (used in step 1 above), and SPARKING (used +// in step 3 above). +// +// COOLING: How much does the air cool as it rises? +// Less cooling = taller flames. More cooling = shorter flames. +// Default 55, suggested range 20-100 +#define COOLING 55 + +// SPARKING: What chance (out of 255) is there that a new spark will be lit? +// Higher chance = more roaring fire. Lower chance = more flickery fire. +// Default 120, suggested range 50-200. +#define SPARKING 120 + + +void Fire2012WithPalette() +{ +// Array of temperature readings at each simulation cell + static byte heat[NUM_LEDS]; + + // Step 1. Cool down every cell a little + for( int i = 0; i < NUM_LEDS; i++) { + heat[i] = qsub8( heat[i], random8(0, ((COOLING * 10) / NUM_LEDS) + 2)); + } + + // Step 2. Heat from each cell drifts 'up' and diffuses a little + for( int k= NUM_LEDS - 1; k >= 2; k--) { + heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2] ) / 3; + } + + // Step 3. Randomly ignite new 'sparks' of heat near the bottom + if( random8() < SPARKING ) { + int y = random8(7); + heat[y] = qadd8( heat[y], random8(160,255) ); + } + + // Step 4. Map from heat cells to LED colors + for( int j = 0; j < NUM_LEDS; j++) { + // Scale the heat value from 0-255 down to 0-240 + // for best results with color palettes. + byte colorindex = scale8( heat[j], 240); + CRGB color = ColorFromPalette( gPal, colorindex); + int pixelnumber; + if( gReverseDirection ) { + pixelnumber = (NUM_LEDS-1) - j; + } else { + pixelnumber = j; + } + leds[pixelnumber] = color; + } +} + |