59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
#include "effect_snake.h"
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#include "functions.h"
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SnakeEffect::SnakeEffect() {
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this->coords = {0, 0};
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}
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void SnakeEffect::loop() {
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if (run++ % EFFECT_SNAKE_SLOWDOWN == 0) { // Change the coordinates only on every n-th run.
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if (random8(EFFECT_SNAKE_DIRECTION_CHANGE)==0 || is_turn_needed()) turn_random();
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this->coords = update_position(this->coords, this->direction);
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}
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fadeToBlackBy(leds, LED_COUNT, 2);
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setPixel(window, this->coords.x, this->coords.y, CHSV(hue, 200, 255));
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hue++;
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}
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void SnakeEffect::turn_random() {
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if ((random8() & 1) == 0) {
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turn_right() || turn_left();
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} else {
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turn_left() || turn_right();
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}
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}
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bool SnakeEffect::turn_left() {
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if (!is_direction_okay(this->direction - 1)) return false;
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this->direction--;
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return true;
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}
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bool SnakeEffect::turn_right() {
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if (!is_direction_okay(this->direction + 1)) return false;
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this->direction++;
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return true;
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}
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bool SnakeEffect::is_turn_needed() {
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return !is_direction_okay(this->direction);
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}
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bool SnakeEffect::is_direction_okay(uint8_t dir) {
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Coords c = update_position(this->coords, dir);
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return c.x<window.w && c.y<window.h;
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}
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Coords SnakeEffect::update_position(Coords original, uint8_t direction) {
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direction = direction % 4;
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if (direction == 0) original.y--;
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else if (direction == 1) original.x++;
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else if (direction == 2) original.y++;
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else if (direction == 3) original.x--;
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return original;
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}
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boolean SnakeEffect::can_be_shown_with_clock() { return true; }
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