Created
June 19, 2019 16:27
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NeoMatrix Rainbow Effect
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| #include <Adafruit_GFX.h> | |
| #include <Adafruit_NeoMatrix.h> | |
| #include <Adafruit_NeoPixel.h> | |
| #define PIN 6 | |
| Adafruit_NeoMatrix matrix = Adafruit_NeoMatrix(32, 8, PIN, | |
| NEO_MATRIX_TOP + NEO_MATRIX_LEFT + | |
| NEO_MATRIX_COLUMNS + NEO_MATRIX_ZIGZAG, | |
| NEO_GRB + NEO_KHZ800); | |
| void setup() { | |
| matrix.begin(); | |
| matrix.setBrightness(30); | |
| matrix.clear(); | |
| } | |
| void loop() { | |
| rainbowCycle(); | |
| } | |
| void rainbowCycle() { | |
| uint16_t i; | |
| for(i = 0; i < 256; i++) { | |
| for(int x = 0; x < matrix.width(); x++) { | |
| for(int y = 0; y < matrix.height(); y++) { | |
| matrix.drawPixel(x, y, Wheel((((x+y) * 256 / (8*32) + i) & 255))); | |
| } | |
| } | |
| matrix.show(); | |
| delay(3); | |
| } | |
| } | |
| // Input a value 0 to 255 to get a color value. | |
| // The colours are a transition r - g - b - back to r. | |
| uint32_t Wheel(byte WheelPos) { | |
| if(WheelPos < 85) { | |
| return matrix.Color(WheelPos * 3, 255 - WheelPos * 3, 0); | |
| } else if(WheelPos < 170) { | |
| WheelPos -= 85; | |
| return matrix.Color(255 - WheelPos * 3, 0, WheelPos * 3); | |
| } else { | |
| WheelPos -= 170; | |
| return matrix.Color(0, WheelPos * 3, 255 - WheelPos * 3); | |
| } | |
| } |
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