<?phpnamespace App\View;use JumPHP\Renderer\Renderer;/** Small squares that fly, fall and fade: dust, sparks, splashes, confetti. Level coordinates. */final class Particles{ private const MAX = 500; /** @var array<int, array{0:float,1:float,2:float,3:float,4:float,5:float,6:array,7:float,8:float}> x y vx vy life max colour size gravity */ private array $list = []; public function clear(): void { $this->list = []; } /** @return array<int, array{0:float,1:float,2:float,3:float,4:float,5:float,6:array,7:float,8:float}> */ public function all(): array { return $this->list; } public function count(): int { return count($this->list); } /** @param array<int, array|string> $colors */ public function burst(float $x, float $y, int $count, array $colors, float $speed = 60, float $life = 0.6, float $gravity = 240, float $size = 1, float $up = 0.5, float $spread = M_PI): void { for ($i = 0; $i < $count && count($this->list) < self::MAX; $i++) { $a = -M_PI / 2 + (mt_rand(-1000, 1000) / 1000) * $spread; $v = $speed * (0.35 + mt_rand(0, 650) / 1000); $c = \JumPHP\Util\Color::of($colors[array_rand($colors)]); $this->list[] = [$x, $y, cos($a) * $v, sin($a) * $v - $speed * $up * 0.3, $life * (0.6 + mt_rand(0, 400) / 1000), $life, [$c->r, $c->g, $c->b], $size + (mt_rand(0, 100) < 25 ? 1 : 0), $gravity]; } } public function update(float $dt): void { foreach ($this->list as $i => &$p) { $p[4] -= $dt; if ($p[4] <= 0) { unset($this->list[$i]); continue; } $p[3] += $p[8] * $dt; $p[0] += $p[2] * $dt; $p[1] += $p[3] * $dt; } unset($p); } public function render(Renderer $r, float $camX, float $camY = 0): void { foreach ($this->list as $p) { $x = $p[0] - $camX; if ($x < -4 || $x > 484) { continue; } $k = $p[4] / $p[5]; $c = $p[6]; $c[3] = $k > 0.5 ? 255 : (int)(255 * $k * 2); $s = $p[7]; $r->fillRect($x, $p[1] - $camY, $s, $s, $c); } }}