将obj模型坐标映射到我的世界地图坐标用C++展示

以下是一个示例代码，展示了将obj模型坐标映射到我的世界地图坐标的过程：

#include <iostream>
#include <fstream>
#include <vector>
#include <string>

struct Vertex {
    float x, y, z;
};

void mapObjToMap(const std::string& objFilePath, const std::string& mapFilePath, const std::string& outputFilePath) {
    std::ifstream objFile(objFilePath);
    std::ifstream mapFile(mapFilePath);
    std::ofstream outputFile(outputFilePath);
    
    std::vector<Vertex> objVertices;
    std::vector<Vertex> mapVertices;
    
    std::string line;
    
    // 读取obj文件中的顶点数据
    while (std::getline(objFile, line)) {
        if (line.substr(0, 2) == "v ") {
            Vertex vertex;
            sscanf_s(line.c_str(), "v %f %f %f", &vertex.x, &vertex.y, &vertex.z);
            objVertices.push_back(vertex);
        }
    }
    
    // 读取地图文件中的顶点数据
    while (std::getline(mapFile, line)) {
        if (line.substr(0, 2) == "v ") {
            Vertex vertex;
            sscanf_s(line.c_str(), "v %f %f %f", &vertex.x, &vertex.y, &vertex.z);
            mapVertices.push_back(vertex);
        }
    }
    
    // 对每个obj模型顶点进行坐标映射
    for (const auto& objVertex : objVertices) {
        Vertex mappedVertex;
        
        // 假设obj模型坐标范围是[-1, 1]
        // 将obj模型坐标映射到地图坐标范围
        mappedVertex.x = (objVertex.x + 1.0f) * 0.5f * (mapVertices.back().x - mapVertices.front().x) + mapVertices.front().x;
        mappedVertex.y = (objVertex.y + 1.0f) * 0.5f * (mapVertices.back().y - mapVertices.front().y) + mapVertices.front().y;
        mappedVertex.z = (objVertex.z + 1.0f) * 0.5f * (mapVertices.back().z - mapVertices.front().z) + mapVertices.front().z;
        
        outputFile << "v " << mappedVertex.x << " " << mappedVertex.y << " " << mappedVertex.z << std::endl;
    }
    
    objFile.close();
    mapFile.close();
    outputFile.close();
}

int main() {
    std::string objFilePath = "path/to/obj/file.obj";
    std::string mapFilePath = "path/to/map/file.obj";
    std::string outputFilePath = "path/to/output/file.obj";
    
    mapObjToMap(objFilePath, mapFilePath, outputFilePath);
    
    return 0;
}

请注意，上述示例代码假设obj模型的坐标范围为[-1, 1]，并将其映射到地图坐标的范围。您可能需要根据实际情况进行调整。此外，上述代码使用了C++标准库中的ifstream和ofstream来读写文件，您可能需要根据您的实际需要进行适当的修改