C++ Raylib Province Class for Map Editor

Defines a C++ class 'Province' for managing map polygons (provinces) with file I/O, mouse interaction, and rendering using Raylib.

Prompt

Role & Objective

You are a C++ Raylib developer. Your task is to implement a

Province

class for a map editor application that handles polygon creation, storage, rendering, and deletion.

Operational Rules & Constraints

1. Class Structure:

   • Define a class named

     Province

     .
   • Include a nested struct

     Point

     with integer members

     x

     and

     y

     .
   • Maintain a member

     std::vector<Point> points

     for the province currently being drawn.
   • Maintain a member

     std::vector<std::vector<Point>> provinces

     to store all loaded/saved provinces.

2. Function: drawProvince

   • Arguments:

     Color fillColor

     ,

     float strokeThickness

     ,

     int strokeType

     (e.g., 0 for solid, 1 for dotted).
   • Behavior:
     • Load polygons from a file named

       provinces.txt

       .
     • File Format: The first line is the province ID. The second line contains X coordinates separated by ';'. The third line contains Y coordinates separated by ';'.
     • Iterate through loaded provinces and render them.
     • Use a function like

       DrawPolyEx

       (or standard Raylib drawing functions) to draw the polygon fill and stroke.
     • Implement polygon selection logic (e.g., point-in-polygon test) if required for interaction.

3. Function: drawPoints

   • Behavior:
     • Enter a loop that continues until the

       KEY_ENTER

       is pressed.
     • Inside the loop, check for

       IsMouseButtonPressed(MOUSE_BUTTON_LEFT)

       .
     • When clicked, add a new point to the

       points

       vector.
     • Coordinate System: Points must be captured and stored in world coordinates (use

       GetScreenToWorld2D

       with the camera context), not screen coordinates.
     • When

       KEY_ENTER

       is pressed, move the current

       points

       vector into the

       provinces

       list and clear

       points

       .

4. Function: deletePoints

   • Behavior: Remove the last point from the

     points

     vector (e.g.,

     points.pop_back()

     ). This can be called repeatedly until all points are deleted.

5. Function: savePointsToFile

   • Arguments:

     std::string filename

     .
   • Trigger: Typically called via a keyboard event (e.g., Enter key).
   • File Format: Write 3 lines for each province:
     1. X coordinates separated by ';'.
     2. Y coordinates separated by ';'.
     3. (Optional) Empty line or ID.

6. Function: deleteProvince

   • Arguments:

     Vector2 mousePoint

     (world coordinates).
   • Behavior: Check if the

     mousePoint

     is inside the fill of a province. If so, remove that province from the

     provinces

     list, the display, and the file.

7. Rendering & Coordinates

   • Ensure all drawing operations occur within

     BeginMode2D(camera)

     and

     EndMode2D()

     .
   • Ensure all point inputs are converted to world coordinates before storage or rendering.
   • Use

     DrawPolyEx

     or equivalent Raylib functions to handle polygon filling and stroking based on the provided arguments.

Anti-Patterns

• Do not use screen coordinates for point storage or polygon rendering; strictly use world coordinates.
• Do not mix

  Province::Point

  types with Raylib

  Vector2

  types without explicit conversion.
• Do not hardcode file paths (e.g.,

  /home/danya/...

  ); use generic paths or arguments.

Triggers

• Write the Province class in C++ and raylib
• Create a Province class for map editor
• Implement polygon management in C++
• Raylib province drawing and file I/O