Loaded obj model flickers and crashes application - c++

Question

I'm trying to load model from obj file and display it in OpenGL 2.0 but I have two problems.
Loaded model sometimes flickers and crashes my application randomly.
I have no idea what causes exception because I don't have even a stacktrace.
I only have "Frame not in module" and message:
Exception thrown at 0x000000CE25E7FF68 in Clock.exe: 0xC0000005: Access violation reading location 0x000000CE26640000.
Do you have any idea what is wrong? Code? File?
ObjLoader.h:
#pragma once
#include <vector>
using namespace std;
typedef struct _vertex {
float x, y, z;
} Vertex;
typedef struct _face {
unsigned int v, vn;
} Face;
struct ObjModel
{
vector<Vertex> Vertices;
vector<Vertex> Normals;
vector<vector<Face>> Faces;
};
class ObjLoader
{
public:
ObjModel LoadObjModel(const char* filePath);
private:
void ProcessIndices(ObjModel &model);
void ProcessLine(string &dataType, stringstream &ss, ObjModel &model);
Vertex ObjLoader::GetVertex(stringstream &ss);
vector<Face> ObjLoader::GetFaces(stringstream &ss);
};
ObjLoader.cpp:
#include "ObjLoader.h"
#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <vector>
using namespace std;
ObjModel ObjLoader::LoadObjModel(const char* filePath)
{
ObjModel model;
fstream in(filePath);
string line;
while (std::getline(in, line))
{
if (line.empty())
{
continue;
}
string dataType = line.substr(0, 2);
line = line.substr(2, line.size() - 2);
if (line[0] == ' ')
{
line = line.substr(1, line.size() - 1);
}
stringstream ss(line);
ProcessLine(dataType, ss, model);
}
ProcessIndices(model);
return model;
}
void ObjLoader::ProcessLine(string &dataType, stringstream &ss, ObjModel &model)
{
if (dataType == "v ")
{
model.Vertices.push_back(GetVertex(ss));
}
else if (dataType == "vn")
{
model.Normals.push_back(GetVertex(ss));
}
else if (dataType == "f ")
{
vector<Face> faces = GetFaces(ss);
model.Faces.push_back(faces);
}
}
Vertex ObjLoader::GetVertex(stringstream &ss)
{
Vertex vertex;
ss >> vertex.x >> vertex.y >> vertex.z;
return vertex;
}
vector<Face> ObjLoader::GetFaces(stringstream &ss)
{
vector<Face> faces;
string s;
while (getline(ss, s, ' '))
{
Face face;
int a, b;
sscanf(s.c_str(), "%d//%d", &a, &b);
face.v = a;
face.vn = b;
faces.push_back(face);
}
return faces;
}
void ObjLoader::ProcessIndices(ObjModel &model)
{
ObjModel temp;
temp.Vertices = vector<Vertex>();
temp.Normals = vector<Vertex>();
for (int i = 0; i < model.Faces.size(); i++)
{
for (int j = 0; j < model.Faces[i].size(); j++)
{
unsigned int vertexIndex = model.Faces[i][j].v - 1;
unsigned int normalIndex = model.Faces[i][j].vn - 1;
Vertex vertex = model.Vertices[vertexIndex];
Vertex normal = model.Normals[normalIndex];
temp.Vertices.push_back(vertex);
temp.Normals.push_back(vertex);
}
}
model.Vertices = temp.Vertices;
model.Normals = temp.Normals;
}
Displaying model:
float *vertices, *normals;
vertices = &model.Vertices[0].x;
normals = &model.Normals[0].x;
glEnable(GL_NORMALIZE);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, vertices);
glNormalPointer(GL_FLOAT, sizeof(float) * 4,normals);
glDrawArrays(GL_TRIANGLES, 0, model.Vertices.size());
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
Obj file:
v -0.048773 -0.250000 -1.004804
v -0.048773 0.250000 -1.004804
v 0.243863 0.250000 -0.975982
v 0.243863 -0.250000 -0.975982
v 0.784410 -0.250000 -0.156029
v 1.004804 -0.250000 -0.048773
v 0.975982 -0.250000 0.243863
v 0.738899 -0.250000 0.306062
v 0.664991 -0.250000 0.444333
v 0.744991 -0.250000 0.676016
v 0.517686 -0.250000 0.862560
v 0.306062 -0.250000 0.738899
v 0.156029 -0.250000 0.784410
v 0.048772 -0.250000 1.004804
v -0.243863 -0.250000 0.975981
v -0.306062 -0.250000 0.738898
v -0.444333 -0.250000 0.664991
v -0.676017 -0.250000 0.744991
v -0.862561 -0.250000 0.517685
v -0.738899 -0.250000 0.306061
v -0.784411 -0.250000 0.156028
v -0.293088 -0.250000 -0.006913
v -0.287323 -0.250000 0.051614
v -0.270251 -0.250000 0.107892
v -0.242528 -0.250000 0.159758
v -0.205220 -0.250000 0.205219
v -0.159759 -0.250000 0.242528
v -0.107893 -0.250000 0.270251
v -0.051615 -0.250000 0.287323
v 0.006912 -0.250000 0.293088
v 0.065440 -0.250000 0.287323
v 0.121718 -0.250000 0.270251
v 0.173584 -0.250000 0.242528
v 0.219045 -0.250000 0.205220
v 0.256353 -0.250000 0.159759
v 0.284076 -0.250000 0.107892
v 0.301148 -0.250000 0.051615
v 0.306913 -0.250000 -0.006913
v 0.306062 -0.250000 -0.738899
v 0.444333 -0.250000 -0.664991
v 0.676016 -0.250000 -0.744991
v 0.862560 -0.250000 -0.517686
v 0.738899 -0.250000 -0.306062
v 0.301148 -0.250000 -0.065440
v 0.284076 -0.250000 -0.121718
v 0.256353 -0.250000 -0.173584
v 0.219045 -0.250000 -0.219045
v 0.173584 -0.250000 -0.256353
v 0.121718 -0.250000 -0.284076
v 0.065440 -0.250000 -0.301148
v 0.006913 -0.250000 -0.306913
v -0.051614 -0.250000 -0.301148
v -0.107892 -0.250000 -0.284077
v -0.159758 -0.250000 -0.256354
v -0.205219 -0.250000 -0.219045
v -0.242528 -0.250000 -0.173584
v -0.270251 -0.250000 -0.121718
v -0.287323 -0.250000 -0.065440
v -1.004804 -0.250000 0.048772
v -0.975981 -0.250000 -0.243864
v -0.738898 -0.250000 -0.306063
v -0.664991 -0.250000 -0.444334
v -0.744990 -0.250000 -0.676017
v -0.517685 -0.250000 -0.862561
v -0.306061 -0.250000 -0.738899
v -0.156028 -0.250000 -0.784411
v -0.156028 0.250000 -0.784411
v -0.306061 0.250000 -0.738899
v -0.517685 0.250000 -0.862561
v -0.744990 0.250000 -0.676017
v -0.664991 0.250000 -0.444334
v -0.738898 0.250000 -0.306063
v -0.975981 0.250000 -0.243864
v -1.004804 0.250000 0.048772
v -0.784411 0.250000 0.156028
v -0.738899 0.250000 0.306061
v -0.862561 0.250000 0.517685
v -0.676017 0.250000 0.744991
v -0.444333 0.250000 0.664991
v -0.306062 0.250000 0.738898
v -0.243863 0.250000 0.975981
v 0.048772 0.250000 1.004804
v 0.156029 0.250000 0.784410
v 0.006912 0.250000 0.293088
v -0.051615 0.250000 0.287323
v -0.107893 0.250000 0.270251
v -0.159759 0.250000 0.242528
v -0.205220 0.250000 0.205219
v -0.242528 0.250000 0.159758
v -0.270251 0.250000 0.107892
v -0.287323 0.250000 0.051614
v -0.293088 0.250000 -0.006913
v -0.287323 0.250000 -0.065440
v -0.270251 0.250000 -0.121718
v -0.242528 0.250000 -0.173584
v -0.205219 0.250000 -0.219045
v -0.159758 0.250000 -0.256354
v -0.107892 0.250000 -0.284077
v -0.051614 0.250000 -0.301148
v 0.006913 0.250000 -0.306913
v 0.306062 0.250000 -0.738899
v 0.065440 0.250000 -0.301148
v 0.121718 0.250000 -0.284076
v 0.173584 0.250000 -0.256353
v 0.219045 0.250000 -0.219045
v 0.256353 0.250000 -0.173584
v 0.284076 0.250000 -0.121718
v 0.301148 0.250000 -0.065440
v 0.306913 0.250000 -0.006913
v 0.301148 0.250000 0.051615
v 0.284076 0.250000 0.107892
v 0.256353 0.250000 0.159759
v 0.219045 0.250000 0.205220
v 0.173584 0.250000 0.242528
v 0.121718 0.250000 0.270251
v 0.065440 0.250000 0.287323
v 0.306062 0.250000 0.738899
v 0.517686 0.250000 0.862560
v 0.744991 0.250000 0.676016
v 0.664991 0.250000 0.444333
v 0.738899 0.250000 0.306062
v 0.975982 0.250000 0.243863
v 1.004804 0.250000 -0.048773
v 0.784410 0.250000 -0.156029
v 0.738899 0.250000 -0.306062
v 0.862560 0.250000 -0.517686
v 0.676016 0.250000 -0.744991
v 0.444333 0.250000 -0.664991
vn 0.0980 0.0000 -0.9952
vn 0.0000 -1.0000 -0.0000
vn -0.8992 0.0000 -0.4376
vn 0.0000 1.0000 0.0000
vn 0.9673 0.0000 -0.2538
vn 0.4714 0.0000 -0.8819
vn -0.3264 0.0000 -0.9452
vn 0.7730 0.0000 -0.6344
vn 0.8634 0.0000 0.5045
vn 0.9569 0.0000 -0.2903
vn 0.4376 0.0000 -0.8992
vn 0.9952 0.0000 0.0980
vn 0.2538 0.0000 0.9673
vn 0.8819 0.0000 0.4714
vn 0.9452 0.0000 -0.3264
vn 0.6344 0.0000 0.7730
vn -0.5045 0.0000 0.8634
vn 0.2903 0.0000 0.9569
vn 0.8992 0.0000 0.4376
vn -0.0980 0.0000 0.9952
vn -0.9673 0.0000 0.2538
vn -0.4714 0.0000 0.8819
vn 0.3264 0.0000 0.9452
vn -0.7730 0.0000 0.6344
vn -0.8634 0.0000 -0.5045
vn -0.9569 0.0000 0.2903
vn -0.4376 0.0000 0.8992
vn -0.9952 0.0000 -0.0980
vn -0.2538 0.0000 -0.9673
vn -0.8819 0.0000 -0.4714
vn -0.9452 0.0000 0.3264
vn -0.6344 0.0000 -0.7730
vn 0.5045 0.0000 -0.8634
vn -0.2903 0.0000 -0.9569
vn 0.0980 0.0000 0.9952
vn -0.2903 0.0000 0.9569
vn 0.4714 0.0000 0.8819
vn -0.6344 0.0000 0.7730
vn 0.7730 0.0000 0.6344
vn -0.8819 0.0000 0.4714
vn 0.9569 0.0000 0.2903
vn -0.9952 0.0000 0.0980
vn 0.9952 0.0000 -0.0980
vn -0.9569 0.0000 -0.2903
vn 0.8819 0.0000 -0.4714
vn -0.7730 0.0000 -0.6344
vn 0.6344 0.0000 -0.7730
vn -0.4714 0.0000 -0.8819
vn 0.2903 0.0000 -0.9569
vn -0.0980 0.0000 -0.9952
s off
f 2//1 4//1 1//1
f 16//2 28//2 29//2
f 51//2 52//2 66//2
f 67//3 1//3 66//3
f 79//4 87//4 88//4
f 111//4 112//4 121//4
f 3//5 39//5 4//5
f 101//6 40//6 39//6
f 128//7 41//7 40//7
f 127//8 42//8 41//8
f 126//9 43//9 42//9
f 125//10 5//10 43//10
f 124//11 6//11 5//11
f 123//12 7//12 6//12
f 122//13 8//13 7//13
f 121//14 9//14 8//14
f 120//15 10//15 9//15
f 119//16 11//16 10//16
f 118//17 12//17 11//17
f 117//18 13//18 12//18
f 83//19 14//19 13//19
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f 81//21 16//21 15//21
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f 76//26 21//26 20//26
f 75//27 59//27 21//27
f 74//28 60//28 59//28
f 73//29 61//29 60//29
f 72//30 62//30 61//30
f 71//31 63//31 62//31
f 70//32 64//32 63//32
f 69//33 65//33 64//33
f 68//34 66//34 65//34
f 50//20 100//20 51//20
f 51//35 99//35 52//35
f 49//36 102//36 50//36
f 52//18 98//18 53//18
f 48//22 103//22 49//22
f 53//37 97//37 54//37
f 47//38 104//38 48//38
f 54//16 96//16 55//16
f 46//24 105//24 47//24
f 55//39 95//39 56//39
f 45//40 106//40 46//40
f 56//14 94//14 57//14
f 44//26 107//26 45//26
f 57//41 93//41 58//41
f 38//42 108//42 44//42
f 58//12 92//12 22//12
f 37//28 109//28 38//28
f 22//43 91//43 23//43
f 36//44 110//44 37//44
f 23//10 90//10 24//10
f 35//30 111//30 36//30
f 24//45 89//45 25//45
f 34//46 112//46 35//46
f 25//8 88//8 26//8
f 33//32 113//32 34//32
f 26//47 87//47 27//47
f 32//48 114//48 33//48
f 27//6 86//6 28//6
f 31//34 115//34 32//34
f 28//49 85//49 29//49
f 30//50 116//50 31//50
f 29//1 84//1 30//1
f 2//1 3//1 4//1
f 38//2 5//2 37//2
f 6//2 7//2 8//2
f 9//2 10//2 12//2
f 5//2 6//2 8//2
f 10//2 11//2 12//2
f 5//2 8//2 37//2
f 37//2 8//2 36//2
f 35//2 36//2 8//2
f 13//2 14//2 16//2
f 14//2 15//2 16//2
f 9//2 35//2 8//2
f 9//2 34//2 35//2
f 13//2 16//2 29//2
f 17//2 18//2 19//2
f 20//2 21//2 24//2
f 17//2 19//2 20//2
f 9//2 33//2 34//2
f 9//2 12//2 33//2
f 16//2 17//2 27//2
f 21//2 22//2 23//2
f 21//2 23//2 24//2
f 33//2 12//2 32//2
f 32//2 12//2 31//2
f 20//2 24//2 25//2
f 20//2 25//2 26//2
f 31//2 12//2 13//2
f 30//2 31//2 13//2
f 17//2 20//2 26//2
f 17//2 26//2 27//2
f 29//2 30//2 13//2
f 16//2 27//2 28//2
f 66//2 1//2 4//2
f 66//2 4//2 39//2
f 63//2 64//2 65//2
f 65//2 66//2 53//2
f 40//2 41//2 42//2
f 66//2 39//2 51//2
f 62//2 63//2 65//2
f 59//2 60//2 61//2
f 61//2 57//2 58//2
f 39//2 40//2 49//2
f 43//2 5//2 44//2
f 40//2 42//2 43//2
f 59//2 61//2 21//2
f 22//2 61//2 58//2
f 22//2 21//2 61//2
f 5//2 38//2 44//2
f 43//2 44//2 45//2
f 61//2 62//2 57//2
f 57//2 62//2 56//2
f 43//2 45//2 46//2
f 43//2 46//2 40//2
f 56//2 62//2 55//2
f 55//2 62//2 65//2
f 40//2 46//2 47//2
f 40//2 47//2 48//2
f 54//2 55//2 65//2
f 53//2 54//2 65//2
f 40//2 48//2 49//2
f 39//2 49//2 50//2
f 52//2 53//2 66//2
f 39//2 50//2 51//2
f 67//3 2//3 1//3
f 3//4 2//4 67//4
f 68//4 69//4 71//4
f 101//4 3//4 67//4
f 69//4 70//4 71//4
f 101//4 67//4 100//4
f 99//4 100//4 67//4
f 98//4 99//4 67//4
f 67//4 68//4 98//4
f 72//4 73//4 74//4
f 68//4 71//4 96//4
f 97//4 98//4 68//4
f 96//4 97//4 68//4
f 71//4 95//4 96//4
f 72//4 74//4 75//4
f 71//4 94//4 95//4
f 76//4 77//4 79//4
f 72//4 94//4 71//4
f 72//4 93//4 94//4
f 77//4 78//4 79//4
f 80//4 81//4 82//4
f 76//4 79//4 88//4
f 72//4 92//4 93//4
f 72//4 75//4 92//4
f 79//4 80//4 87//4
f 82//4 83//4 80//4
f 83//4 84//4 85//4
f 92//4 75//4 91//4
f 91//4 75//4 90//4
f 80//4 83//4 85//4
f 80//4 85//4 86//4
f 90//4 75//4 76//4
f 89//4 90//4 76//4
f 80//4 86//4 87//4
f 88//4 89//4 76//4
f 128//4 101//4 103//4
f 101//4 100//4 102//4
f 126//4 127//4 125//4
f 125//4 127//4 128//4
f 101//4 102//4 103//4
f 128//4 103//4 104//4
f 124//4 125//4 108//4
f 122//4 123//4 121//4
f 121//4 123//4 124//4
f 125//4 128//4 106//4
f 128//4 104//4 105//4
f 120//4 121//4 112//4
f 118//4 119//4 117//4
f 84//4 83//4 116//4
f 117//4 119//4 120//4
f 128//4 105//4 106//4
f 125//4 106//4 107//4
f 117//4 120//4 114//4
f 116//4 83//4 117//4
f 115//4 116//4 117//4
f 125//4 107//4 108//4
f 124//4 108//4 109//4
f 114//4 115//4 117//4
f 113//4 114//4 120//4
f 121//4 124//4 110//4
f 124//4 109//4 110//4
f 112//4 113//4 120//4
f 121//4 110//4 111//4
f 3//5 101//5 39//5
f 101//6 128//6 40//6
f 128//7 127//7 41//7
f 127//8 126//8 42//8
f 126//9 125//9 43//9
f 125//10 124//10 5//10
f 124//11 123//11 6//11
f 123//12 122//12 7//12
f 122//13 121//13 8//13
f 121//14 120//14 9//14
f 120//15 119//15 10//15
f 119//16 118//16 11//16
f 118//17 117//17 12//17
f 117//18 83//18 13//18
f 83//19 82//19 14//19
f 82//20 81//20 15//20
f 81//21 80//21 16//21
f 80//22 79//22 17//22
f 79//23 78//23 18//23
f 78//24 77//24 19//24
f 77//25 76//25 20//25
f 76//26 75//26 21//26
f 75//27 74//27 59//27
f 74//28 73//28 60//28
f 73//29 72//29 61//29
f 72//30 71//30 62//30
f 71//31 70//31 63//31
f 70//32 69//32 64//32
f 69//33 68//33 65//33
f 68//34 67//34 66//34
f 50//20 102//20 100//20
f 51//35 100//35 99//35
f 49//36 103//36 102//36
f 52//18 99//18 98//18
f 48//22 104//22 103//22
f 53//37 98//37 97//37
f 47//38 105//38 104//38
f 54//16 97//16 96//16
f 46//24 106//24 105//24
f 55//39 96//39 95//39
f 45//40 107//40 106//40
f 56//14 95//14 94//14
f 44//26 108//26 107//26
f 57//41 94//41 93//41
f 38//42 109//42 108//42
f 58//12 93//12 92//12
f 37//28 110//28 109//28
f 22//43 92//43 91//43
f 36//44 111//44 110//44
f 23//10 91//10 90//10
f 35//30 112//30 111//30
f 24//45 90//45 89//45
f 34//46 113//46 112//46
f 25//8 89//8 88//8
f 33//32 114//32 113//32
f 26//47 88//47 87//47
f 32//48 115//48 114//48
f 27//6 87//6 86//6
f 31//34 116//34 115//34
f 28//49 86//49 85//49
f 30//50 84//50 116//50
f 29//1 85//1 84//1

Answer 1

I'm going to say that glNormalPointer(GL_FLOAT, sizeof(float) * 4,normals); is causing your problems. First off, you only have 3 components in your normals, not four. I bet this is causing glDrawArrays to access out of bounds memory.
Also, because your normals are not walked correctly you could be getting garbage and it would cause some flickering.
Because your normals are tightly packed, just use 0 for the stride.