75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/* Copyright 2021 HorrorTroll <https://github.com/HorrorTroll>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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extern HSV gradient_0;
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extern HSV gradient_100;
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extern bool reflected_gradient;
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static HSV INTERPOLATE_HSV(float step, HSV gradient_0, HSV gradient_100) {
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uint8_t cw, ccw;
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HSV color;
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cw = (gradient_0.h >= gradient_100.h) ? 255 + gradient_100.h - gradient_0.h : gradient_100.h - gradient_0.h; // Hue range is 0 to 255.
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ccw = (gradient_0.h >= gradient_100.h) ? gradient_0.h - gradient_100.h : 255 + gradient_0.h - gradient_100.h;
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if( cw < ccw ) { // going clockwise
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color.h = gradient_0.h + (uint8_t)(step * cw);
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} else { // Going counter clockwise
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color.h = gradient_0.h - (uint8_t)(step * ccw);
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}
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color.s = gradient_0.s + step * (gradient_100.s - gradient_0.s);
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// Scale V with global RGB Matrix's V, so users can still control overall brightness with RGB_VAI & RGB_VAD0
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color.v = round((gradient_0.v + step * (gradient_100.v - gradient_0.v)) * ((float)rgb_matrix_config.hsv.v / 255));
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return color;
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}
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static HSV CUSTOM_GRADIENT_math(uint8_t led_x, uint8_t min_x, uint8_t max_x) {
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float step = (float)led_x / (max_x - min_x);
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float mid_gradient_pos = 0.5;
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if( reflected_gradient ) {
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if( step <= mid_gradient_pos ) {
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return INTERPOLATE_HSV(step * (1/mid_gradient_pos), gradient_0, gradient_100);
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} else {
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return INTERPOLATE_HSV((step - mid_gradient_pos) * (1/(1-mid_gradient_pos)), gradient_100, gradient_0);
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}
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} else {
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return INTERPOLATE_HSV(step, gradient_0, gradient_100);
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}
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}
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static bool CUSTOM_GRADIENT(effect_params_t* params) {
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RGB_MATRIX_USE_LIMITS(led_min, led_max);
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uint8_t min_x = 0; // X coordinate of the left-most LED
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uint8_t max_x = 224; // X coordinate of the right-most LED
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for (uint8_t i = led_min; i < led_max; i++) {
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RGB_MATRIX_TEST_LED_FLAGS();
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HSV hsv_orig = CUSTOM_GRADIENT_math(g_led_config.point[i].x, min_x, max_x);
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RGB rgb = hsv_to_rgb(hsv_orig);
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rgb_matrix_set_color(i, rgb.r, rgb.g, rgb.b);
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}
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return led_max < DRIVER_LED_TOTAL;
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}
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