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+/* Copyright 2020 Sam Reinehr
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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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+#include QMK_KEYBOARD_H
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+enum my_keycodes {
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+ K00 = SAFE_RANGE,
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+ K01,
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+ K02,
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+ K03,
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+ K04,
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+ K05,
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+ K06,
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+ K07,
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+ K08,
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+ K09,
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+ K10,
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+ K11,
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+ K12,
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+ K13,
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+ K14,
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+ K15,
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+};
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+/* just a simple way to give each key a unique code */
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+//clang-format off
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+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
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+ /* Base */
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+ [0] = LAYOUT_ortho_4x4(
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+ K00, K01, K02, K03,
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+ K04, K05, K06, K07,
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+ K08, K09, K10, K11,
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+ K12, K13, K14, K15
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+ )
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+};
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+/* flags describing current free square/0 */
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+uint8_t current = 0;
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+/* r g and b describe the colors for the initial map,
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+currently blank for free, and evenly spaced hues with maximum sat/value */
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+const uint8_t r[16] = {
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+ 0x00, 0xFF, 0xFF, 0xFF,
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+ 0xCC, 0x66, 0x00, 0x00,
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+ 0x00, 0x00, 0x00, 0x00,
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+ 0x66, 0xCC, 0xFF, 0xFF
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+};
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+const uint8_t g[16] = {
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+ 0x00, 0x00, 0x66, 0xCC,
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+ 0xFF, 0xFF, 0xFF, 0xFF,
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+ 0xFF, 0xCC, 0x66, 0x00,
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+ 0x00, 0x00, 0x00, 0x00
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+};
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+const uint8_t b[16] = {
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+ 0x00, 0x00, 0x00, 0x00,
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+ 0x00, 0x00, 0x00, 0x66,
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+ 0xCC, 0xFF, 0xFF, 0xFF,
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+ 0xFF, 0xFF, 0xCC, 0x66
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+};
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+/* pos contains the current positions, could technically be compressed to 4 bits per, but not worth it
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+ index into pos is the position we're looking at, output is the tile that is currently there */
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+uint8_t tiles[16] = {
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+ 0, 1, 2, 3,
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+ 4, 5, 6, 7,
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+ 8, 9, 10, 11,
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+ 12, 13, 14, 15
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+};
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+/* default led array for super 16 has them in a snake, so we must do some remapping/flipping of the 2nd and 4th rows */
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+uint8_t remap[16] = {
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+ 0, 1, 2, 3,
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+ 7, 6, 5, 4,
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+ 8, 9, 10, 11,
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+ 15, 14, 13, 12
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+};
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+//clang-format on
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+/* function to refresh the led coloring with the positions with current tiles */
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+void refresh_leds(void) {
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+ for (uint8_t index = 0; index < 16; ++index) {
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+ uint8_t tile = tiles[index];
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+ setrgb(r[tile], g[tile], b[tile], (LED_TYPE *)&led[remap[index]]);
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+ }
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+ rgblight_set();
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+}
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+void keyboard_post_init_user(void) {
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+ rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
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+ rgblight_enable_noeeprom();
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+ refresh_leds();
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+}
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+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
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+ uint8_t offset = keycode - K00;
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+ uint8_t x = offset & 0x03;
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+ uint8_t y = (offset & 0x0C) >> 2;
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+ /* if the adjacent space exists and is empty, */
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+ if ((x > 0 && 0 == tiles[offset - 1]) || (y > 0 && 0 == tiles[offset - 4]) || (x < 3 && 0 == tiles[offset + 1]) || (y < 3 && 0 == tiles[offset + 4])) {
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+ /* set the currently blank tile to this tile, and make this one blank */
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+ tiles[current] = tiles[offset];
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+ tiles[offset] = 0;
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+ current = offset;
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+ }
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+ refresh_leds();
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+ return false;
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+}
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swreinehr