rgb_matrix_module.inc (2723B)
1 // Copyright 2024-2025 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 RGB_MATRIX_EFFECT(FLOW) 16 17 #ifdef RGB_MATRIX_CUSTOM_EFFECT_IMPLS 18 19 // "Flow" animated effect. Draws moving wave patterns mimicking the appearance 20 // of flowing liquid. For interesting variety of patterns, space coordinates are 21 // slowly rotated and a function of several sine waves is evaluated. 22 static bool FLOW(effect_params_t* params) { 23 RGB_MATRIX_USE_LIMITS(led_min, led_max); 24 25 static uint16_t wrap_correction = 0; 26 static uint8_t last_high_byte = 0; 27 const uint8_t time_scale = 1 + rgb_matrix_config.speed / 8; 28 const uint8_t high_byte = (uint8_t)(g_rgb_timer >> 16); 29 if (last_high_byte != high_byte) { 30 last_high_byte = high_byte; 31 wrap_correction += ((uint16_t)time_scale) << 8; 32 } 33 const uint16_t time = scale16by8(g_rgb_timer, time_scale) + wrap_correction; 34 35 // Compute rotation coefficients with 7 fractional bits. 36 const int8_t rot_c = cos8(time / 4) - 128; 37 const int8_t rot_s = sin8(time / 4) - 128; 38 const uint8_t omega = 32 + sin8(time) / 4; 39 40 for (uint8_t i = led_min; i < led_max; ++i) { 41 RGB_MATRIX_TEST_LED_FLAGS(); 42 const uint8_t x = g_led_config.point[i].x; 43 const uint8_t y = g_led_config.point[i].y; 44 45 // Rotate (x, y) by the 2x2 rotation matrix described by rot_c, rot_s. 46 const uint8_t x1 = (uint8_t)((((int16_t)rot_c) * ((int16_t)x)) / 128) - (uint8_t)((((int16_t)rot_s) * ((int16_t)y)) / 128); 47 const uint8_t y1 = (uint8_t)((((int16_t)rot_s) * ((int16_t)x)) / 128) + (uint8_t)((((int16_t)rot_c) * ((int16_t)y)) / 128); 48 49 uint8_t value = scale8(sin8(x1 - 2 * time), omega) + y1 + time / 4; 50 value = (value <= 127) ? value : (255 - value); 51 52 hsv_t hsv = rgb_matrix_config.hsv; 53 hsv.h -= value / 4; 54 hsv.s = scale8(hsv.s, (value < 74) ? 255 : (549 - 4 * value)); 55 hsv.v = scale8(hsv.v, (value < 95) ? (64 + 2 * value) : 255); 56 57 rgb_t rgb = rgb_matrix_hsv_to_rgb(hsv); 58 rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b); 59 } 60 61 return rgb_matrix_check_finished_leds(led_max); 62 } 63 64 #endif // RGB_MATRIX_CUSTOM_EFFECT_IMPLS