diff options
Diffstat (limited to 'src/colorutils.cpp')
| -rw-r--r-- | src/colorutils.cpp | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/colorutils.cpp b/src/colorutils.cpp index a1acaa5a..941f4686 100644 --- a/src/colorutils.cpp +++ b/src/colorutils.cpp @@ -62,6 +62,47 @@ void fill_rainbow( struct CHSV * targetArray, int numToFill, } +void fill_rainbow_circular(struct CRGB* targetArray, int numToFill, uint8_t initialhue, bool reversed) +{ + if (numToFill == 0) return; // avoiding div/0 + + CHSV hsv; + hsv.hue = initialhue; + hsv.val = 255; + hsv.sat = 240; + + const uint16_t hueChange = 65535 / (uint16_t)numToFill; // hue change for each LED, * 256 for precision (256 * 256 - 1) + uint16_t hueOffset = 0; // offset for hue value, with precision (*256) + + for (int i = 0; i < numToFill; ++i) { + targetArray[i] = hsv; + if (reversed) hueOffset -= hueChange; + else hueOffset += hueChange; + hsv.hue = initialhue + (uint8_t)(hueOffset >> 8); // assign new hue with precise offset (as 8-bit) + } +} + +void fill_rainbow_circular(struct CHSV* targetArray, int numToFill, uint8_t initialhue, bool reversed) +{ + if (numToFill == 0) return; // avoiding div/0 + + CHSV hsv; + hsv.hue = initialhue; + hsv.val = 255; + hsv.sat = 240; + + const uint16_t hueChange = 65535 / (uint16_t) numToFill; // hue change for each LED, * 256 for precision (256 * 256 - 1) + uint16_t hueOffset = 0; // offset for hue value, with precision (*256) + + for (int i = 0; i < numToFill; ++i) { + targetArray[i] = hsv; + if (reversed) hueOffset -= hueChange; + else hueOffset += hueChange; + hsv.hue = initialhue + (uint8_t)(hueOffset >> 8); // assign new hue with precise offset (as 8-bit) + } +} + + void fill_gradient_RGB( CRGB* leds, uint16_t startpos, CRGB startcolor, uint16_t endpos, CRGB endcolor ) |