decouple seaweed from entity

src/Seaweed.cpp

@@ -4,38 +4,37 @@
 #include "defs.h"
 #include <ncurses.h>
 
-Seaweed::Seaweed() : Entity() {
-  speed = Random::floatInRange(0.1f, 0.3f);
-  height = Random::intInRange(SEAWEED_MIN_HEIGHT, SEAWEED_MAX_HEIGHT);
-  x = Random::intInRange(0, Aquarium::getInstance().getWidth());
-  y = Aquarium::getInstance().getHeight() - 1;
-  lifetime = Random::intInRange(SEAWEED_MIN_LIFETIME, SEAWEED_MAX_LIFETIME);
+Seaweed::Seaweed()
+    : x(Random::intInRange(0, Aquarium::getInstance().getWidth())),
+      y(Aquarium::getInstance().getHeight()),
+      height(Random::intInRange(SEAWEED_MIN_HEIGHT, SEAWEED_MAX_HEIGHT)),
+      speed(Random::floatInRange(0.1f, 0.3f)),
+      lifetime(Random::intInRange(SEAWEED_MIN_LIFETIME, SEAWEED_MAX_LIFETIME)) {
 }
 
-void Seaweed::update() {
+void Seaweed::update() noexcept {
   frame += speed;
   if (frame >= 1.0f) {
-    std::swap(pattern[0], pattern[1]);
+    pattern_flipped = !pattern_flipped;
     frame -= 1.0f;
   }
   --lifetime;
 }
 
-void Seaweed::draw() {
-  std::string line;
-  std::string colorLine;
+void Seaweed::draw() const {
+  auto &aquarium = Aquarium::getInstance();
 
-  for (int i = 0; i < height; ++i) {
-    line.clear();
-    char ch = (pattern[i % 2] == '(') ? '(' : ')';
+  std::string line(1, '\0');
+  std::string colorLine(1, 'g');
 
-    // Adjust x and y based on the pattern
-    int drawX = (ch == '(') ? x : x + 1;
-    int drawY = y - i;
+  for (size_t i = 0; i < height; ++i) {
+    // Determine character and position for this segment
+    const bool use_left = (i % 2 == 0) ^ pattern_flipped;
+    const char ch = use_left ? PATTERN_LEFT : PATTERN_RIGHT;
+    const int drawX = static_cast<int>(x) + (use_left ? 0 : 1);
+    const int drawY = y - static_cast<int>(i);
 
-    line.push_back(ch);
-    colorLine.push_back('g');
-
-    Aquarium::getInstance().drawToBackBuffer(drawY, drawX, 0, line, colorLine);
+    line[0] = ch;
+    aquarium.drawToBackBuffer(drawY, drawX, 0, line, colorLine);
   }
 }

src/Seaweed.h

@@ -1,18 +1,24 @@
 #pragma once
-#include "Entity.h"
+#include <cstddef>
 
-class Seaweed : public Entity {
+class Seaweed {
 private:
-  char pattern[2] = {'(', ')'};
+  const int y;
+  static constexpr char PATTERN_LEFT = '(';
+  static constexpr char PATTERN_RIGHT = ')';
 
-  float speed, frame = 0;
-  int lifetime;
-  int height;
+  const size_t x;
+  const size_t height;
+  const float speed;
+
+  float frame = 0.0f;
+  size_t lifetime;
+  bool pattern_flipped = false;
 
 public:
   Seaweed();
 
-  int getLifetime() { return lifetime; };
-  void update();
-  void draw();
+  size_t getLifetime() const noexcept { return lifetime; }
+  void update() noexcept;
+  void draw() const;
 };