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libraries/FastLED/examples/NoisePlayground/NoisePlayground.ino

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+
+
+/// @file    NoisePlayground.ino
+/// @brief   Demonstrates how to use noise generation on a 2D LED matrix
+/// @example NoisePlayground.ino
+
+#include <FastLED.h>
+
+#if defined(__AVR__)
+// too large for ATtiny85, attiny88, etc.. Just disable it for all avr boards.
+void setup() {};
+void loop() {};
+#else
+
+// Params for width and height
+const uint8_t kMatrixWidth = 16;
+const uint8_t kMatrixHeight = 16;
+
+#define NUM_LEDS (kMatrixWidth * kMatrixHeight)
+
+// Param for different pixel layouts
+#define kMatrixSerpentineLayout  true
+
+// led array
+CRGB leds[kMatrixWidth * kMatrixHeight];
+
+// x,y, & time values
+uint32_t x,y,v_time,hue_time,hxy;
+
+// Play with the values of the variables below and see what kinds of effects they
+// have!  More octaves will make things slower.
+
+// how many octaves to use for the brightness and hue functions
+uint8_t octaves=1;
+uint8_t hue_octaves=3;
+
+// the 'distance' between points on the x and y axis
+int xscale=57771;
+int yscale=57771;
+
+// the 'distance' between x/y points for the hue noise
+int hue_scale=1;
+
+// how fast we move through time & hue noise
+int time_speed=1111;
+int hue_speed=31;
+
+// adjust these values to move along the x or y axis between frames
+int x_speed=331;
+int y_speed=1111;
+
+void loop() {
+  // fill the led array 2/16-bit noise values
+  fill_2dnoise16(leds, kMatrixWidth, kMatrixHeight, kMatrixSerpentineLayout,
+                octaves,x,xscale,y,yscale,v_time,
+                hue_octaves,hxy,hue_scale,hxy,hue_scale,hue_time, false);
+
+  FastLED.show();
+
+  // adjust the intra-frame time values
+  x += x_speed;
+  y += y_speed;
+  v_time += time_speed;
+  hue_time += hue_speed;
+  // delay(50);
+}
+
+
+void setup() {
+  // initialize the x/y and time values
+  random16_set_seed(8934);
+  random16_add_entropy(analogRead(3));
+
+  Serial.begin(57600);
+  Serial.println("resetting!");
+
+  delay(3000);
+  FastLED.addLeds<WS2811,2,GRB>(leds,NUM_LEDS);
+  FastLED.setBrightness(96);
+
+  hxy = (uint32_t)((uint32_t)random16() << 16) + (uint32_t)random16();
+  x = (uint32_t)((uint32_t)random16() << 16) + (uint32_t)random16();
+  y = (uint32_t)((uint32_t)random16() << 16) + (uint32_t)random16();
+  v_time = (uint32_t)((uint32_t)random16() << 16) + (uint32_t)random16();
+  hue_time = (uint32_t)((uint32_t)random16() << 16) + (uint32_t)random16();
+
+}
+
+#endif