diff options
Diffstat (limited to 'modules/qmk/flow_led_matrix_effect/led_matrix_module.inc')
-rw-r--r-- | modules/qmk/flow_led_matrix_effect/led_matrix_module.inc | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/modules/qmk/flow_led_matrix_effect/led_matrix_module.inc b/modules/qmk/flow_led_matrix_effect/led_matrix_module.inc new file mode 100644 index 0000000000..734e0f3494 --- /dev/null +++ b/modules/qmk/flow_led_matrix_effect/led_matrix_module.inc @@ -0,0 +1,58 @@ +// Copyright 2024-2025 Google LLC +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +LED_MATRIX_EFFECT(FLOW) + +#ifdef LED_MATRIX_CUSTOM_EFFECT_IMPLS + +// "Flow" animated effect. Draws moving wave patterns mimicking the appearance +// of flowing liquid. For interesting variety of patterns, space coordinates are +// slowly rotated and a function of several sine waves is evaluated. +static bool FLOW(effect_params_t* params) { + LED_MATRIX_USE_LIMITS(led_min, led_max); + + static uint16_t wrap_correction = 0; + static uint8_t last_high_byte = 0; + const uint8_t time_scale = 1 + led_matrix_eeconfig.speed / 8; + const uint8_t high_byte = (uint8_t)(g_led_timer >> 16); + if (last_high_byte != high_byte) { + last_high_byte = high_byte; + wrap_correction += ((uint16_t)time_scale) << 8; + } + const uint16_t time = scale16by8(g_led_timer, time_scale) + wrap_correction; + + // Compute rotation coefficients with 7 fractional bits. + const int8_t rot_c = cos8(time / 4) - 128; + const int8_t rot_s = sin8(time / 4) - 128; + const uint8_t omega = 32 + sin8(time) / 4; + + for (uint8_t i = led_min; i < led_max; ++i) { + LED_MATRIX_TEST_LED_FLAGS(); + const uint8_t x = g_led_config.point[i].x; + const uint8_t y = g_led_config.point[i].y; + + // Rotate (x, y) by the 2x2 rotation matrix described by rot_c, rot_s. + const uint8_t x1 = (uint8_t)((((int16_t)rot_c) * ((int16_t)x)) / 128) - (uint8_t)((((int16_t)rot_s) * ((int16_t)y)) / 128); + const uint8_t y1 = (uint8_t)((((int16_t)rot_s) * ((int16_t)x)) / 128) + (uint8_t)((((int16_t)rot_c) * ((int16_t)y)) / 128); + + uint8_t value = scale8(sin8(x1 - 2 * time), omega) + y1 + time / 4; + value = (value <= 127) ? value : (255 - value); + + led_matrix_set_value(i, scale8(led_matrix_eeconfig.val, value)); + } + + return led_matrix_check_finished_leds(led_max); +} + +#endif // LED_MATRIX_CUSTOM_EFFECT_IMPLS |