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@ -1,11 +1,13 @@ |
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#pragma once |
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#ifndef DISABLE_RGB_MATRIX_DIGITAL_RAIN |
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#if defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_DIGITAL_RAIN) |
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#ifndef RGB_DIGITAL_RAIN_DROPS |
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// lower the number for denser effect/wider keyboard |
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#define RGB_DIGITAL_RAIN_DROPS 24 |
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#endif |
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extern uint8_t rgb_frame_buffer[MATRIX_ROWS][MATRIX_COLS]; |
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bool rgb_matrix_digital_rain(effect_params_t* params) { |
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// algorithm ported from https://github.com/tremby/Kaleidoscope-LEDEffect-DigitalRain |
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const uint8_t drop_ticks = 28; |
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@ -13,24 +15,24 @@ bool rgb_matrix_digital_rain(effect_params_t* params) { |
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const uint8_t max_brightness_boost = 0xc0; |
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const uint8_t max_intensity = 0xff; |
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static uint8_t map[MATRIX_COLS][MATRIX_ROWS] = {{0}}; |
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static uint8_t drop = 0; |
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if (params->init) { |
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rgb_matrix_set_color_all(0, 0, 0); |
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memset(map, 0, sizeof map); |
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memset(rgb_frame_buffer, 0, sizeof rgb_frame_buffer); |
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drop = 0; |
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} |
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for (uint8_t col = 0; col < MATRIX_COLS; col++) { |
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) { |
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if (row == 0 && drop == 0 && rand() < RAND_MAX / RGB_DIGITAL_RAIN_DROPS) { |
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// top row, pixels have just fallen and we're |
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// making a new rain drop in this column |
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map[col][row] = max_intensity; |
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rgb_frame_buffer[col][row] = max_intensity; |
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} |
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else if (map[col][row] > 0 && map[col][row] < max_intensity) { |
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else if (rgb_frame_buffer[col][row] > 0 && rgb_frame_buffer[col][row] < max_intensity) { |
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// neither fully bright nor dark, decay it |
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map[col][row]--; |
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rgb_frame_buffer[col][row]--; |
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} |
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// set the pixel colour |
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uint8_t led[LED_HITS_TO_REMEMBER]; |
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@ -38,32 +40,33 @@ bool rgb_matrix_digital_rain(effect_params_t* params) { |
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// TODO: multiple leds are supported mapped to the same row/column |
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if (led_count > 0) { |
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if (map[col][row] > pure_green_intensity) { |
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const uint8_t boost = (uint8_t) ((uint16_t) max_brightness_boost * (map[col][row] - pure_green_intensity) / (max_intensity - pure_green_intensity)); |
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if (rgb_frame_buffer[col][row] > pure_green_intensity) { |
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const uint8_t boost = (uint8_t) ((uint16_t) max_brightness_boost * (rgb_frame_buffer[col][row] - pure_green_intensity) / (max_intensity - pure_green_intensity)); |
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rgb_matrix_set_color(led[0], boost, max_intensity, boost); |
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} |
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else { |
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const uint8_t green = (uint8_t) ((uint16_t) max_intensity * map[col][row] / pure_green_intensity); |
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const uint8_t green = (uint8_t) ((uint16_t) max_intensity * rgb_frame_buffer[col][row] / pure_green_intensity); |
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rgb_matrix_set_color(led[0], 0, green, 0); |
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} |
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} |
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} |
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} |
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if (++drop > drop_ticks) { |
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// reset drop timer |
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drop = 0; |
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for (uint8_t row = MATRIX_ROWS - 1; row > 0; row--) { |
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for (uint8_t col = 0; col < MATRIX_COLS; col++) { |
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// if ths is on the bottom row and bright allow decay |
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if (row == MATRIX_ROWS - 1 && map[col][row] == max_intensity) { |
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map[col][row]--; |
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if (row == MATRIX_ROWS - 1 && rgb_frame_buffer[col][row] == max_intensity) { |
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rgb_frame_buffer[col][row]--; |
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} |
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// check if the pixel above is bright |
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if (map[col][row - 1] == max_intensity) { |
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if (rgb_frame_buffer[col][row - 1] == max_intensity) { |
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// allow old bright pixel to decay |
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map[col][row - 1]--; |
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rgb_frame_buffer[col][row - 1]--; |
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// make this pixel bright |
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map[col][row] = max_intensity; |
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rgb_frame_buffer[col][row] = max_intensity; |
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} |
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} |
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} |
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@ -71,4 +74,4 @@ bool rgb_matrix_digital_rain(effect_params_t* params) { |
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return false; |
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} |
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#endif // DISABLE_RGB_MATRIX_DIGITAL_RAIN |
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#endif // defined(RGB_MATRIX_FRAMEBUFFER_EFFECTS) && !defined(DISABLE_RGB_MATRIX_DIGITAL_RAIN) |