Tweak the Christmas animation effect to be less harsh on the eyes (#7648)
* Tweak the Christmas animation effect to be less harsh on the eyes * Further improve the tweaked Christmas animation code - Use constants where it makes sense - Instead of complicated math, use a static variable to keep track if it's animating from or to red - Don't use pow (but a simple macro instead) - Using floating point math is necessary for the fraction in the cubic bezier function to work * Update docs for the tweaked Christmas animation effect * Further improve memory usage - Don't use floats, but 32 bit ints instead (where needed) - Replace limits.h with constant * Fix typo
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3 changed files with 40 additions and 17 deletions
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@ -126,19 +126,19 @@ Use these defines to add or remove animations from the firmware. When you are ru
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The following options are used to tweak the various animations:
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|Define |Default |Description |
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|------------------------------------|-------------|-------------------------------------------------------------------------------------|
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|Define |Default |Description |
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|------------------------------------|-------------|-----------------------------------------------------------------------------------------------|
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|`RGBLIGHT_EFFECT_BREATHE_CENTER` |*Not defined*|If defined, used to calculate the curve for the breathing animation. Valid values are 1.0 to 2.7 |
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|`RGBLIGHT_EFFECT_BREATHE_MAX` |`255` |The maximum brightness for the breathing mode. Valid values are 1 to 255 |
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|`RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL`|`1000` |How long to wait between light changes for the "Christmas" animation, in milliseconds|
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|`RGBLIGHT_EFFECT_CHRISTMAS_STEP` |`2` |The number of LEDs to group the red/green colors by for the "Christmas" animation |
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|`RGBLIGHT_EFFECT_KNIGHT_LED_NUM` |`RGBLED_NUM` |The number of LEDs to have the "Knight" animation travel |
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|`RGBLIGHT_EFFECT_KNIGHT_LENGTH` |`3` |The number of LEDs to light up for the "Knight" animation |
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|`RGBLIGHT_EFFECT_KNIGHT_OFFSET` |`0` |The number of LEDs to start the "Knight" animation from the start of the strip by |
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|`RGBLIGHT_RAINBOW_SWIRL_RANGE` |`255` |Range adjustment for the rainbow swirl effect to get different swirls |
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|`RGBLIGHT_EFFECT_SNAKE_LENGTH` |`4` |The number of LEDs to light up for the "Snake" animation |
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|`RGBLIGHT_EFFECT_TWINKLE_LIFE` |`75` |Adjusts how quickly each LED brightens and dims when twinkling (in animation steps) |
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|`RGBLIGHT_EFFECT_TWINKLE_PROBABILITY`|`1/127` |Adjusts how likely each LED is to twinkle (on each animation step) |
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|`RGBLIGHT_EFFECT_BREATHE_MAX` |`255` |The maximum brightness for the breathing mode. Valid values are 1 to 255 |
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|`RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL`|`40` |How long (in milliseconds) to wait between animation steps for the "Christmas" animation |
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|`RGBLIGHT_EFFECT_CHRISTMAS_STEP` |`2` |The number of LEDs to group the red/green colors by for the "Christmas" animation |
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|`RGBLIGHT_EFFECT_KNIGHT_LED_NUM` |`RGBLED_NUM` |The number of LEDs to have the "Knight" animation travel |
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|`RGBLIGHT_EFFECT_KNIGHT_LENGTH` |`3` |The number of LEDs to light up for the "Knight" animation |
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|`RGBLIGHT_EFFECT_KNIGHT_OFFSET` |`0` |The number of LEDs to start the "Knight" animation from the start of the strip by |
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|`RGBLIGHT_RAINBOW_SWIRL_RANGE` |`255` |Range adjustment for the rainbow swirl effect to get different swirls |
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|`RGBLIGHT_EFFECT_SNAKE_LENGTH` |`4` |The number of LEDs to light up for the "Snake" animation |
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|`RGBLIGHT_EFFECT_TWINKLE_LIFE` |`75` |Adjusts how quickly each LED brightens and dims when twinkling (in animation steps) |
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|`RGBLIGHT_EFFECT_TWINKLE_PROBABILITY`|`1/127` |Adjusts how likely each LED is to twinkle (on each animation step) |
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### Example Usage to Reduce Memory Footprint
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1. Remove `RGBLIGHT_ANIMATIONS` from `config.h`.
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@ -1163,16 +1163,39 @@ void rgblight_effect_knight(animation_status_t *anim) {
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#endif
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#ifdef RGBLIGHT_EFFECT_CHRISTMAS
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# define CUBED(x) ((x) * (x) * (x))
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/**
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* Christmas lights effect, with a smooth animation between red & green.
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*/
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void rgblight_effect_christmas(animation_status_t *anim) {
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uint8_t hue;
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static int8_t increment = 1;
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const uint8_t max_pos = 32;
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const uint8_t hue_green = 85;
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uint32_t xa;
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uint8_t hue, val;
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uint8_t i;
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anim->current_offset = (anim->current_offset + 1) % 2;
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// The effect works by animating anim->pos from 0 to 32 and back to 0.
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// The pos is used in a cubic bezier formula to ease-in-out between red and green, leaving the interpolated colors visible as short as possible.
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xa = CUBED((uint32_t) anim->pos);
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hue = ((uint32_t) hue_green) * xa / (xa + CUBED((uint32_t) (max_pos - anim->pos)));
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// Additionally, these interpolated colors get shown with a slightly darker value, to make them less prominent than the main colors.
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val = 255 - (3 * (hue < hue_green / 2 ? hue : hue_green - hue) / 2);
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for (i = 0; i < rgblight_ranges.effect_num_leds; i++) {
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hue = 0 + ((i / RGBLIGHT_EFFECT_CHRISTMAS_STEP + anim->current_offset) % 2) * 85;
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sethsv(hue, rgblight_config.sat, rgblight_config.val, (LED_TYPE *)&led[i + rgblight_ranges.effect_start_pos]);
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uint8_t local_hue = (i / RGBLIGHT_EFFECT_CHRISTMAS_STEP) % 2 ? hue : hue_green - hue;
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sethsv(local_hue, rgblight_config.sat, val, (LED_TYPE *)&led[i + rgblight_ranges.effect_start_pos]);
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}
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rgblight_set();
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if (anim->pos == 0) {
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increment = 1;
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} else if (anim->pos == max_pos) {
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increment = -1;
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}
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anim->pos += increment;
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}
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#endif
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@ -142,7 +142,7 @@ enum RGBLIGHT_EFFECT_MODE {
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# endif
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# ifndef RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL
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# define RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL 1000
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# define RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL 40
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# endif
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# ifndef RGBLIGHT_EFFECT_CHRISTMAS_STEP
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