#include <SDL.h>
 
// กำหนดขนาดหน้าจอและขนาดของแต่ละ "ช่อง" บนแผนที่
#define SCREEN_WIDTH 800
#define SCREEN_HEIGHT 600
#define TILE_SIZE 32 // ขนาดของแต่ละช่องสี่เหลี่ยมในแผนที่ (เช่น 32x32 พิกเซล)
 
// ข้อมูลแผนที่ (ตัวอย่างง่ายๆ)
int map[10][10] = {
    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {0, 1, 1, 1, 0, 0, 0, 0, 0, 0},
    {0, 1, 1, 1, 0, 0, 0, 0, 0, 0},
    {0, 0, 0, 0, 0, 0, 2, 2, 0, 0},
    {0, 0, 0, 0, 0, 0, 2, 2, 0, 0},
    {0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {0, 0, 3, 3, 3, 3, 3, 0, 0, 0},
    {0, 0, 0, 0, 0, 0, 3, 0, 0, 0},
    {0, 0, 0, 0, 0, 0, 3, 0, 0, 0},
    {0, 0, 0, 0, 0, 0, 3, 0, 0, 0}
};
 
int main(int argc, char* args[]) {
    SDL_Window* window = NULL;
    SDL_Renderer* renderer = NULL;
 
    // 1. เริ่มต้น SDL
    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
        printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
        return 1;
    }
 
    // 2. สร้างหน้าต่าง
    window = SDL_CreateWindow("2D Map", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
    if (window == NULL) {
        printf("Window could not be created! SDL_Error: %s\n", SDL_GetError());
        SDL_Quit();
        return 1;
    }
 
    // 3. สร้าง Renderer (สำหรับวาดภาพ)
    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
    if (renderer == NULL) {
        printf("Renderer could not be created! SDL_Error: %s\n", SDL_GetError());
        SDL_DestroyWindow(window);
        SDL_Quit();
        return 1;
    }
 
    // ลูปหลักของโปรแกรม
    int quit = 0;
    SDL_Event e;
    while (!quit) {
        // จัดการอีเวนต์ (เช่น กดปิดหน้าต่าง)
        while (SDL_PollEvent(&e) != 0) {
            if (e.type == SDL_QUIT) {
                quit = 1;
            }
        }
 
        // 4. ล้างหน้าจอด้วยสีดำ
        SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xFF);
        SDL_RenderClear(renderer);
 
        // 5. วาดแผนที่
        for (int y = 0; y < 10; y++) {
            for (int x = 0; x < 10; x++) {
                SDL_Rect fillRect = { x * TILE_SIZE, y * TILE_SIZE, TILE_SIZE, TILE_SIZE };
 
                switch (map[y][x]) {
                    case 0: // พื้นดิน (สีเขียว)
                        SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF);
                        break;
                    case 1: // น้ำ (สีฟ้า)
                        SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, 0xFF);
                        break;
                    case 2: // ต้นไม้ (สีน้ำตาลเข้ม)
                        SDL_SetRenderDrawColor(renderer, 0x65, 0x43, 0x21, 0xFF);
                        break;
                    case 3: // ถนน (สีเทา)
                        SDL_SetRenderDrawColor(renderer, 0x80, 0x80, 0x80, 0xFF);
                        break;
                    default: // ค่าเริ่มต้น (สีดำ)
                        SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xFF);
                        break;
                }
                SDL_RenderFillRect(renderer, &fillRect);
            }
        }
 
        // 6. อัปเดตหน้าจอ
        SDL_RenderPresent(renderer);
    }
 
    // 7. ล้างข้อมูลและปิด SDL
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();
 
    return 0;
}

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