refactor waterline

src/Waterline.cpp

@@ -3,9 +3,8 @@
 #include "Random.h"
 #include "defs.h"
 #include <algorithm>
-#include <ncurses.h>
 
-Waterline::Waterline() : x(0), y(5) {
+Waterline::Waterline() : x(0), y(WATERLINE_Y) {
   shape = {
       "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", "^^^^ ^^^  ^^^   ^^^    ^^^^      ",
       "^^^^      ^^^^     ^^^    ^^     ", "^^      ^^^^      ^^^    ^^^^^^  "};
@@ -16,21 +15,26 @@ Waterline::Waterline() : x(0), y(5) {
     while (line.size() < width) {
       line += original;
     }
+    colorLines.emplace_back(line.size(), WATERLINE_COLOR);
   }
 }
 
 void Waterline::draw() const {
   for (size_t i = 0; i < shape.size(); ++i) {
-    Aquarium::getInstance().drawToBackBuffer(i + y, x, 0, shape[i],
-                                             std::string(shape[i].size(), 'c'));
+    Aquarium::getInstance().drawToBackBuffer(y + static_cast<int>(i), x, 0,
+                                             shape[i], colorLines[i]);
   }
 }
 
 void Waterline::update() {
+  // Skip the first line (index 0) as it's static
   for (size_t i = 1; i < shape.size(); ++i) {
-    // Probability increases with line index (later lines = higher chance)
-    float chance = static_cast<float>(i) / shape.size();
-    if (Random::floatInRange(0.0f, 1.0f) < chance * (1.0f / WAVE_MOVE_CHANCE)) {
+    // Probability increases with depth (higher index = more movement)
+    float movementChance =
+        static_cast<float>(i) / static_cast<float>(shape.size());
+    float threshold = movementChance / WAVE_MOVE_CHANCE;
+
+    if (Random::floatInRange(0.0f, 1.0f) < threshold) {
       int direction = Random::intInRange(0, 1) == 0 ? -1 : 1;
       shiftString(shape[i], direction);
     }
@@ -38,7 +42,7 @@ void Waterline::update() {
 }
 
 void Waterline::shiftString(std::string &str, int direction) {
-  if (direction == 1) {
+  if (direction > 0) {
     std::rotate(str.rbegin(), str.rbegin() + 1, str.rend());
   } else {
     std::rotate(str.begin(), str.begin() + 1, str.end());

src/Waterline.h

@@ -1,11 +1,18 @@
 #pragma once
-#include "Entity.h"
+#include <string>
+#include <vector>
 
 class Waterline {
 private:
+  static constexpr int WATERLINE_Y = 5;
+  static constexpr char WATERLINE_COLOR = 'c';
+
   size_t x, y;
   std::vector<std::string> shape;
-  void shiftString(std::string &, int direction);
+  std::vector<std::string> colorLines;
+
+  void shiftString(std::string &str, int direction);
+  void initializeShape();
 
 public:
   Waterline();