OCTREE.exe中0x1000bbae处的未处理异常: 0xC0000005:写入位置0x000000a8的访问冲突

Question

我在下面的代码中得到了上面的运行时错误：

glutMainLoop(); 

为什么？

#include <stdio.h>
#include <vector>
#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <cassert>
#include <math.h>
#include <gl/glut.h>
#include <stdlib.h>

class Vertex {

public: float X;
        float Y;
        float Z;

public: Vertex (float first, float second, float third){

            X=first;
            Y=second;
            Z=third;

        }

};


using namespace std;

vector <Vertex> vertexCoordinates;
vector <vector<int>> faces;
vector <vector<float>> faceNormals;
vector <vector<float>> faceCenters;

void loadOff(string inputFileName) {


    int vertexCount; int faceCount; int edgeCount;

    ifstream inputFileStream;

    inputFileStream.open(inputFileName.data());

    assert(inputFileStream.is_open());

    string actualLine;

    inputFileStream>>vertexCount;
    inputFileStream>>faceCount;
    inputFileStream>>edgeCount;


    for (int loadVertexIndex=0; loadVertexIndex<vertexCount; loadVertexIndex++){


        float X;
        float Y;
        float Z;

        inputFileStream>>(float)X;
        inputFileStream>>(float)Y;
        inputFileStream>>(float)Z;

        vertexCoordinates.push_back(Vertex(X,Y,Z));

        if(inputFileStream.eof())break;

    }

    for (int faceIndex=0; faceIndex<=faceCount; faceIndex++){ //<= faceCount?

      string line;

      getline(inputFileStream, line);

      istringstream actualLineStream(line);


      std::vector<int> face((std::istream_iterator<int>(actualLineStream)),
      std::istream_iterator<int>());


      faces.push_back(face);


    }//end for faceCount

}

void display(void) {

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glMatrixMode(GL_MODELVIEW);



    glutSwapBuffers();

    glutPostRedisplay();



}


void init(){

    //loadOff("spider.off");

    //BLACK BACKGROUND
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

    glEnable(GL_DEPTH_TEST);

    glPolygonMode(GL_BACK, GL_LINE);
    glPolygonMode(GL_FRONT, GL_LINE);

}



void reshape(int w, int h) {


    glViewport (0,0,(GLsizei) w, (GLsizei) h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluLookAt(0.0f, 0.0f, 1.0f, 0.0f, 0.0f, -1.0f, 0.0f, 1.0f, 0.0f);
    glMatrixMode(GL_MODELVIEW);

}

void keyboard (unsigned char key, int x, int y){

}

void specialKeys(int key, int x, int y) {

}



int main(int argc, char *argv[]){

    glutInit(&argc, argv);
    glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH );
    glutInitWindowSize(800,600);

    init();
    glutDisplayFunc(display);


    glutMainLoop();
    return 0;
}

Answer 1

我已经7年没有使用GLUT了，所以对我的回答持保留态度。这就是说，你的init()函数让我有点担心。我认为在编写GLUT程序时，应该只在GLUT回调函数中发出OpenGL命令。我不确定在执行init()函数时是否有活动的OpenGL上下文。如果删除对init()的调用，程序是否会崩溃

Answer 2

尝试在0x000000a8写入时出现异常。发生的情况是，您的代码或openGL接收的是空指针，而不是有效指针。有问题的代码试图从该指针的偏移量168 (0xa8)处更新某些内容。