<?phpnamespace App\Td;/** * Something a tower threw: it follows its target and hits it (or the ground where it was, when it died). */final class Projectile{ public bool $done = false; public float $fromX; public float $fromY; /** @param array<string, mixed> $stats the tower's stats when it shot */ public function __construct(public float $x, public float $y, public ?Enemy $target, public float $targetX, public float $targetY, public readonly array $stats, public readonly bool $crit, public readonly string $tower) { $this->fromX = $x; $this->fromY = $y; } public function kind(): string { return (string)($this->stats['projectile'] ?? 'arrow'); } /** Moves; true when it arrived. */ public function step(float $h): bool { if ($this->target !== null && !$this->target->dead && !$this->target->escaped) { $this->targetX = $this->target->x; $this->targetY = $this->target->y; } else { $this->target = null; } $dx = $this->targetX - $this->x; $dy = $this->targetY - $this->y; $dist = hypot($dx, $dy); $move = (float)$this->stats['speed'] * $h; if ($dist <= $move || $dist < 1) { $this->x = $this->targetX; $this->y = $this->targetY; return true; } $this->x += $dx / $dist * $move; $this->y += $dy / $dist * $move; return false; }}