first commit

libraries/FastLED/examples/FxFire2012/FxFire2012.ino

@@ -0,0 +1,75 @@
+
+/// @brief   Simple one-dimensional fire animation function
+// 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 50, suggested range 20-100 
+
+// 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.
+
+#include <FastLED.h>
+#include "fx/1d/fire2012.h"
+#include "fl/screenmap.h"
+
+using namespace fl;
+
+#define LED_PIN     5
+#define COLOR_ORDER GRB
+#define CHIPSET     WS2811
+#define NUM_LEDS    92
+
+#define BRIGHTNESS  128
+#define FRAMES_PER_SECOND 30
+#define COOLING 55
+#define SPARKING 120
+#define REVERSE_DIRECTION false
+
+CRGB leds[NUM_LEDS];
+Fire2012Ptr fire = Fire2012Ptr::New(NUM_LEDS, COOLING, SPARKING, REVERSE_DIRECTION);
+
+void setup() {
+  ScreenMap screenMap = ScreenMap::DefaultStrip(NUM_LEDS, 1.5, .4);
+  FastLED.addLeds<CHIPSET, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS)
+    .setCorrection(TypicalLEDStrip)
+    .setScreenMap(screenMap)
+    .setRgbw();
+  FastLED.setBrightness(BRIGHTNESS);
+}
+
+void loop()
+{
+  fire->draw(Fx::DrawContext(millis(), leds)); // run simulation frame
+  
+  FastLED.show(millis()); // display this frame
+  FastLED.delay(1000 / FRAMES_PER_SECOND);
+}
+