void Fragment::generateFragment(glm::vec3 fPos, glm::vec3 fAng){

renderAng = fAng;
renderPos = fPos;

    //create a single fragment
for(int x = 0; x <FRAGMENTSIZE; x++) {
    for(int y = 0; y <FRAGMENTSIZE; y++){
        for(int z = 0; z<FRAGMENTSIZE; z++){


        fragment[x][y][z] = 1;

        }
    }

}

int render = 0;

// initate vectors to store the information about the visible faces
std::vector<GLfloat> chunkVertices;
std::vector<GLfloat> chunkNormals;
std::vector<GLfloat> chunkTextures;

//analyze each face to see if its visible
    for(int x = 0; x <FRAGMENTSIZE; x++) {
     for(int y = 0; y<FRAGMENTSIZE; y++){
      for(int z = 0; z<FRAGMENTSIZE; z++){

            if(fragment[x][y][z] != 0) {
                render = 0;
                if(fragment[x+1][y][z]==0 || x == FRAGMENTSIZE-1) {
                  renderVisible[renderIndex][0]=1;
                render=1;
                }
                if(fragment[x-1][y][z]==0 || x == 0) {
                  renderVisible[renderIndex][1]=1;
                render=1;
                }
                if(fragment[x][y+1][z]==0 || y == FRAGMENTSIZE-1) {
                    renderVisible[renderIndex][5]=1;
                render=1;
                }
                if(fragment[x][y-1][z]==0 || y == 0) {
                    renderVisible[renderIndex][4]=1;
                render=1;
                }
                if(fragment[x][y][z+1]==0 || z == FRAGMENTSIZE-1) {
                    renderVisible[renderIndex][3]=1;
                render=1;
                }
                if(fragment[x][y][z-1]==0 || z == 0) {
                    renderVisible[renderIndex][2]=1;
                render=1;
                }

int side = 0;
int draw = 0;
int sideadd = 0;

// if one or more faces are visible
    if(render) {
           for(int idx = 0; idx < 6; idx++) {
            draw = renderVisible[renderIndex][idx];

       if(draw) {

        // adding texture points
        for(int i = idx*6; i < idx*6+6; i++) {
        chunkTextures.push_back(texture_data[i]);
        }

        // adding surface normals and vertexes
       // sideadd variable is used to insert the proper coordinates into each face
                    for(int i = idx*12; i < idx*12+12; i++) {

                  switch(side) {
                  case 0:
                      sideadd = x;
                          break;
                  case 1:
                      sideadd = y;
                      break;
                  case 2:
                      sideadd = z;
                      break;
                  }

                  chunkVertices.push_back(vertice_data[i]+sideadd);
                  chunkNormals.push_back(normals[i]);

                  side++; if(side>2) {side=0;}
                  }
              }
            }
        }
      }
    } // z
      } // y
   } // x


   // converting the vectors to buffers that can be drawn in the main rendering loop
glGenBuffers(1, &normalbuf);
glBindBuffer(GL_ARRAY_BUFFER, normalbuf);
glBufferData(GL_ARRAY_BUFFER, chunkNormals.size()*sizeof(chunkNormals[0]), &chunkNormals, GL_STATIC_DRAW);


glGenBuffers(1, &vertexbuf);
glBindBuffer(GL_ARRAY_BUFFER, vertexbuf);
glBufferData(GL_ARRAY_BUFFER, chunkVertices.size()*sizeof(chunkVertices[0]), &chunkVertices, GL_STATIC_DRAW);


glGenBuffers(1, &uvbuf);
glBindBuffer(GL_ARRAY_BUFFER, uvbuf);
glBufferData(GL_ARRAY_BUFFER, chunkTextures.size()*sizeof(chunkTextures[0]), &chunkTextures, GL_STATIC_DRAW);
}

First-chance exception at 0x69977420 in minecraft.exe: 0xC0000005: Access violation reading location 0x00300000.
Unhandled exception at 0x77a415de (ntdll.dll) in minecraft.exe: 0xC0000005: Access violation reading location 0x00300000.

static const GLfloat texture_data[] = {
    //right
    0.66f, 1.0f,
    0.33f, 0.5f,
    0.33f, 1.0f,

    //right
    0.33f, 0.5f,
    0.66f, 1.0f,
    0.66f, 0.5f,

    //left
    0.0f,  0.0f,
    0.33f, 0.0f,
    0.33f, 0.5f,

    //left
    0.0f,  0.0f,
    0.33f,  0.5f,
    0.0f, 0.5f,

    // rear
    0.33f, 0.5f,
    0.66f, 0.0f,
    0.66f, 0.5f,

    //rear
    0.33f, 0.5f,
    0.33f, 0.0f,
    0.66f, 0.0f,

    //front
    0.33f, 1.0f,
    0.33f, 0.5f,
    0.0f, 0.5f,

    //front
    0.0f, 1.0f,
    0.33f, 1.0f,
    0.0f, 0.5f,

    //bottom
    1.0f, 0.5f,
    0.666f, 0.0f,
    1.0f, 0.0f,

    //bottom
    1.0f, 0.5f,
    0.666f, 0.5f,
    0.666f, 0.0f,

    // top
    0.6666f, 0.5f,
    0.666f, 1.0f,
    1.0f, 1.0f,

    // top
    0.6666f, 0.5f,
    1.00f, 1.0f,
    1.00f, 0.5f


};
static const GLfloat vertice_data[] = {
    //right
     1.0f, 1.0f, 1.0f,
     1.0f,-1.0f,-1.0f,
     1.0f, 1.0f,-1.0f,

     //right
     1.0f,-1.0f,-1.0f,
     1.0f, 1.0f, 1.0f,
     1.0f,-1.0f, 1.0f,

    //left
    -1.0f,-1.0f,-1.0f,
    -1.0f,-1.0f, 1.0f,
    -1.0f, 1.0f, 1.0f,

     //left
    -1.0f,-1.0f,-1.0f,
    -1.0f, 1.0f, 1.0f,
    -1.0f, 1.0f,-1.0f,


    //rear
     1.0f, 1.0f,-1.0f,
    -1.0f,-1.0f,-1.0f,
    -1.0f, 1.0f,-1.0f,

    //rear
     1.0f, 1.0f,-1.0f,
     1.0f,-1.0f,-1.0f,
    -1.0f,-1.0f,-1.0f,

    //front
    -1.0f, 1.0f, 1.0f,
    -1.0f,-1.0f, 1.0f,
     1.0f,-1.0f, 1.0f,

    //front
     1.0f, 1.0f, 1.0f,
    -1.0f, 1.0f, 1.0f,
     1.0f,-1.0f, 1.0f,

     //bottom
     1.0f,-1.0f, 1.0f,
    -1.0f,-1.0f,-1.0f,
     1.0f,-1.0f,-1.0f,

    //bottom
     1.0f,-1.0f, 1.0f,
    -1.0f,-1.0f, 1.0f,
    -1.0f,-1.0f,-1.0f,

     //top
     1.0f, 1.0f, 1.0f,
     1.0f, 1.0f,-1.0f,
    -1.0f, 1.0f,-1.0f,

    //top
     1.0f, 1.0f, 1.0f,
    -1.0f, 1.0f,-1.0f,
    -1.0f, 1.0f, 1.0f



};
static const GLfloat normals[] = {
 //right
 1.0f, 0.0f, 0.0f,
 1.0f, 0.0f, 0.0f,
 1.0f, 0.0f, 0.0f,
 //right
 1.0f, 0.0f, 0.0f,
 1.0f, 0.0f, 0.0f,
 1.0f, 0.0f, 0.0f,

  //left
 -1.0f, 0.0f, 0.0f,
 -1.0f, 0.0f, 0.0f,
 -1.0f, 0.0f, 0.0f,
 //left
 -1.0f, 0.0f, 0.0f,
 -1.0f, 0.0f, 0.0f,
 -1.0f, 0.0f, 0.0f,

 //rear
 0.0f, 0.0f, -1.0f,
 0.0f, 0.0f, -1.0f,
 0.0f, 0.0f, -1.0f,

  //rear
 0.0f, 0.0f, -1.0f,
 0.0f, 0.0f, -1.0f,
 0.0f, 0.0f, -1.0f,

 //front
 0.0f, 0.0f, 1.0f,
 0.0f, 0.0f, 1.0f,
 0.0f, 0.0f, 1.0f,
 //front
 0.0f, 0.0f, 1.0f,
 0.0f, 0.0f, 1.0f,
 0.0f, 0.0f, 1.0f,


 //bottom
 0.0f, -1.0f, 0.0f,
 0.0f, -1.0f, 0.0f,
 0.0f, -1.0f, 0.0f,
 //bottom
 0.0f, -1.0f, 0.0f,
 0.0f, -1.0f, 0.0f,
 0.0f, -1.0f, 0.0f,

 //top
 0.0f, 1.0f, 0.0f,
 0.0f, 1.0f, 0.0f,
 0.0f, 1.0f, 0.0f,
 //top
 0.0f, 1.0f, 0.0f,
 0.0f, 1.0f, 0.0f,
 0.0f, 1.0f, 0.0f

};