game_pathfinding 0.1.3

一个寻路库，包含AStar和Recast，目前还在开发阶段
Documentation 
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#include <stdio.h>
#include <stdint.h>
#include <dlfcn.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdbool.h>

struct CPoint {
  int32_t x;
  int32_t y;
};

struct CPointArray {
    uintptr_t length;
    const struct CPoint *data;
    uintptr_t cap;
};

typedef void (*InitRuntimeFunc)(uintptr_t);
typedef bool (*SetWalkableFunc)(int64_t, const struct CPoint*, int32_t);
typedef void (*FreePathFunc)(struct CPointArray);

typedef int64_t (*LoadMapFunc)(const char *);
typedef int64_t (*LoadMapFromStringFunc)(const char *file_content);
typedef struct CPointArray (*FindPathFunc)(int64_t, const struct CPoint *, const struct CPoint *);

int main()
{
    /*手动加载指定位置的so动态库*/
    void* handle = dlopen("./libpathfinding.so", RTLD_LAZY);
    LoadMapFunc load_map;
    FindPathFunc find_path;
    InitRuntimeFunc init_runtime;
    SetWalkableFunc set_walkable;
    FreePathFunc free_path;
    LoadMapFromStringFunc load_map_from_string;


    /*根据动态链接库操作句柄与符号，返回符号对应的地址*/
    init_runtime = dlsym(handle, "init_runtime");
    set_walkable = dlsym(handle, "set_walkable");
    free_path = dlsym(handle, "free_path");
    load_map_from_string = dlsym(handle, "load_map_from_string");
    load_map = dlsym(handle, "load_map");
    find_path = dlsym(handle, "find_path");

    init_runtime(1);

    FILE *file;
    char *buffer;
    long file_length;

    // 打开文件
    file = fopen("World.json", "rb");
    if (file == NULL) {
        perror("Error opening file");
        return 1;
    }

    fseek(file, 0, SEEK_END);
    file_length = ftell(file);
    rewind(file);

    buffer = (char *)malloc(file_length + 1);
    if (buffer == NULL) {
        perror("Error allocating memory");
        fclose(file);
        return 1;
    }

    if (fread(buffer, 1, file_length, file) != file_length) {
        perror("Error reading file");
        free(buffer);
        fclose(file);
        return 1;
    }

    // 在文件末尾添加字符串结束符
    buffer[file_length] = '\0';

    int64_t map_id = load_map_from_string(buffer);

    // 释放内存和关闭文件
    free(buffer);
    fclose(file);

    if(map_id == 0)
    {
        printf("加载地图失败\n");
        return 2;
    }

    for(int x = 0; x < 10; x++)
    {
        struct CPoint start, end;
        start.x = 1;
        start.y = 0;
        end.x = 14;
        end.y = 15;
        struct CPointArray path = find_path(map_id, &start, &end);
        printf("path len: %d\n", path.length);

        if(path.length == 0)
        {
            printf("寻路失败\n");
            sleep(1);
            continue;
        }

        for(int i = 0; i < path.length; i++)
        {
            printf("(%d, %d)\n", path.data[i].x, path.data[i].y);
        }


        struct CPoint walkable_point;
        walkable_point.x = path.data[3 + x].x;
        walkable_point.y = path.data[3 + x].y;
        set_walkable(map_id, &walkable_point, 1);

        free_path(path);

        sleep(1);
    }

    return 0;
}