Hi Guys,

I am getting a unhandled exception : access violation.

Have been remarking things out…

Still havent fixed it, but this is where I am at:

My program runs for a little while, draws the graphics on screen, but after a few seconds throws the above error.

```
int DrawGLScene(GLvoid) // Here's Where We Do All The Drawing
{
int i;
GLfloat radius_1=1.8f;
GLfloat radius_2=2.0f;
GLfloat radius_3=2.2f;
//////////XSENS STUFF //////////////
GetData();
///////////////////////////////////
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // Clear Screen And Depth Buffer
glLoadIdentity(); // Reset The Current Modelview Matrix
glTranslatef(0.0f,0.0f,-7.0f);
//**** Disable texturing
glDisable(GL_TEXTURE_2D);
// glPushMatrix(); //1 push
glRotatef(fOrientationData[0],0.0f,0.0f,1.0f);
glTranslatef(0.0f,(fOrientationData[1]/18.0)+0.0f,0.0f);
//**** Blue/Brown of Horizon
glBegin(GL_QUADS);
glColor3f(0.0f, 0.6f, 0.796f);
glVertex3f(-6.0f, 18.0f, 0.0f); // Top Left
glVertex3f( 6.0f, 18.0f, 0.0f); // Top Right
glVertex3f( 6.0, 0.0f, 0.0f); // Bottom Right
glVertex3f(-6.0f, 0.0f, 0.0f); // Bottom Left
glColor3f(0.694f, 0.4f, 0.0f);
glVertex3f(-6.0f, -18.0f, 0.0f); // Top Left
glVertex3f( 6.0f, -18.0f, 0.0f); // Top Right
glVertex3f( 6.0f, 0.0f, 0.0f); // Bottom Right
glVertex3f(-6.0f, 0.0f, 0.0f); // Bottom Left
glEnd();
//**** Horizon Lines
for (lines=-18; lines<19; lines++)
{
glBegin(GL_LINES);
glColor3f(1.0f, 1.0f, 1.0f); // Sets Color White
glVertex3f(-6.0f, 0.0f, 0.0f); //Level
glVertex3f(6.0f, 0.0f, 0.0f);
glVertex3f(-0.75f, lines+1.0f, 0.0f); //10 UP
glVertex3f(0.75f, lines+1.0f, 0.0f);
glVertex3f(-0.25f, lines+0.75f, 0.0f); // ---
glVertex3f(0.25f, lines+0.75f, 0.0f);
glVertex3f(-0.5f, lines+0.5f, 0.0f); //---===---
glVertex3f(0.5f, lines+0.5f, 0.0f);
glVertex3f(-0.25f, lines+0.25f, 0.0f); // ---
glVertex3f(0.25f, lines+0.25f, 0.0f);
glEnd();
}
/*
//***** Font Stuff ******
glPushMatrix(); // 2 push
glColor3f(1.0f,1.0f,1.0f);
glTranslatef(-1.1f,-0.1f,0.0f);
for (i=10;i<90;i=i+10)
{
stringstream ss;
ss << i;
glTranslatef(0.0f,1.0f,0.0f);
glPrint(ss.str().c_str());
}
glPopMatrix();
glTranslatef(0.8f,-0.1f,0.0f);
for (i=10;i<190;i=i+10)
{
stringstream ss;
ss << i;
glTranslatef(0.0f,1.0f,0.0f);
glPrint(ss.str().c_str());
}
glPopMatrix();
*/
/*
// WINGS
glBegin(GL_QUADS);
glColor3f(0.0f,0.0f,0.0f);
glVertex3f(-1.75f,0.075f,0.0f); //LEFT
glVertex3f(-0.75f,0.075f,0.0f);
glVertex3f(-0.75f,-0.075f,0.0f);
glVertex3f(-1.75f,-0.075f,0.0f);
glVertex3f(-0.75f,-0.075f,0.0f);
glVertex3f(-0.75f,-0.175f,0.0f);
glVertex3f(-0.875f,-0.175f,0.0f);
glVertex3f(-0.875f,-0.075f,0.0f);
glVertex3f(1.75f,0.075f,0.0f); //RIGHT
glVertex3f(0.75f,0.075f,0.0f);
glVertex3f(0.75f,-0.075f,0.0f);
glVertex3f(1.75f,-0.075f,0.0f);
glVertex3f(0.75f,-0.075f,0.0f);
glVertex3f(0.75f,-0.175f,0.0f);
glVertex3f(0.875f,-0.175f,0.0f);
glVertex3f(0.875f,-0.075f,0.0f);
glVertex3f(-0.075f,0.075f,0.0f); // MIDDLE DOT
glVertex3f(0.075f,0.075f,0.0f);
glVertex3f(0.075f,-0.075f,0.0f);
glVertex3f(-0.075f,-0.075f,0.0f);
glColor3f(1.0f, 1.0f, 1.0f);
glEnd();
// OUTLINES IN WHITE
glBegin(GL_LINE_LOOP);
glColor3f(1.0f,1.0f,1.0f);
glVertex3f(-1.75f,0.075f,0.0f); //LEFT
glVertex3f(-0.75f,0.075f,0.0f);
glVertex3f(-0.75f,-0.175f,0.0f);
glVertex3f(-0.875f,-0.175f,0.0f);
glVertex3f(-0.875f,-0.075f,0.0f);
glVertex3f(-1.75f,-0.075f,0.0f);
glEnd();
glBegin(GL_LINE_LOOP);
glColor3f(1.0f,1.0f,1.0f);
glVertex3f(1.75f,0.075f,0.0f); //LEFT
glVertex3f(0.75f,0.075f,0.0f);
glVertex3f(0.75f,-0.175f,0.0f);
glVertex3f(0.875f,-0.175f,0.0f);
glVertex3f(0.875f,-0.075f,0.0f);
glVertex3f(1.75f,-0.075f,0.0f);
glEnd();
glBegin(GL_LINE_LOOP);
glVertex3f(-0.075f,0.075f,0.0f); // MIDDLE DOT
glVertex3f(0.075f,0.075f,0.0f);
glVertex3f(0.075f,-0.075f,0.0f);
glVertex3f(-0.075f,-0.075f,0.0f);
glColor3f(1.0f, 1.0f, 1.0f);
glEnd();
// glPopMatrix(); // 1 pop
// MOVING NON FILLED BANK TRIANGLE
// glPushMatrix(); // 2 push
glRotatef(fOrientationData[0],0.0f,0.0f,1.0f);
glBegin(GL_LINE_LOOP);
glVertex3f(-0.15f,1.6f,0.0f);
glVertex3f(-0.15f,1.5f,0.0f);
glVertex3f(0.15f,1.5f,0.0f);
glVertex3f(0.15f,1.6f,0.0f);
glVertex3f(0.0f,1.8,0.0f);
glColor3f(1.0f, 1.0f, 1.0f);
glEnd();
// glPopMatrix(); // 2 pop
glBegin(GL_TRIANGLES); // NON MOVING BANK TRIANGLE - R=1.8
glVertex3f(0.0f,1.8,0.0f);
glVertex3f(-0.15f,2.0f,0.0f);
glVertex3f(0.15f,2.0f,0.0f);
glEnd();
glRotatef(90,0.0f,0.0f,1.0f);
glBegin(GL_LINES);
glVertex3f(radius_1*cos(pi/18),radius_1*sin(pi/18),0.0f); //10 deg
glVertex3f(radius_2*cos(pi/18),radius_2*sin(pi/18),0.0f);
glVertex3f(radius_1*cos(pi/9),radius_1*sin(pi/9),0.0f); // 20 deg
glVertex3f(radius_2*cos(pi/9),radius_2*sin(pi/9),0.0f);
glVertex3f(radius_1*cos(pi/6),radius_1*sin(pi/6),0.0f); // 30 deg
glVertex3f(radius_3*cos(pi/6),radius_3*sin(pi/6),0.0f);
glVertex3f(radius_1*cos(pi/4),radius_1*sin(pi/4),0.0f); // 45 deg
glVertex3f(radius_2*cos(pi/4),radius_2*sin(pi/4),0.0f);
glVertex3f(radius_1*cos(pi/3),radius_1*sin(pi/3),0.0f); // 60 deg
glVertex3f(radius_3*cos(pi/3),radius_3*sin(pi/3),0.0f);
glEnd();
pi=pi*-1;
glBegin(GL_LINES);
glVertex3f(radius_1*cos(pi/18),radius_1*sin(pi/18),0.0f); //10 deg
glVertex3f(radius_2*cos(pi/18),radius_2*sin(pi/18),0.0f);
glVertex3f(radius_1*cos(pi/9),radius_1*sin(pi/9),0.0f); // 20 deg
glVertex3f(radius_2*cos(pi/9),radius_2*sin(pi/9),0.0f);
glVertex3f(radius_1*cos(pi/6),radius_1*sin(pi/6),0.0f); // 30 deg
glVertex3f(radius_3*cos(pi/6),radius_3*sin(pi/6),0.0f);
glVertex3f(radius_1*cos(pi/4),radius_1*sin(pi/4),0.0f); // 45 deg
glVertex3f(radius_2*cos(pi/4),radius_2*sin(pi/4),0.0f);
glVertex3f(radius_1*cos(pi/3),radius_1*sin(pi/3),0.0f); // 60 deg
glVertex3f(radius_3*cos(pi/3),radius_3*sin(pi/3),0.0f);
glEnd();
//**** Enable texturing
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
glDisable(GL_DEPTH_TEST);
glBlendFunc(GL_DST_COLOR,GL_ZERO);
glBindTexture(GL_TEXTURE_2D, texture[1]);
glBegin(GL_QUADS); // Start Drawing A Textured Quad
glTexCoord2f(0.0f, 1.0f); glVertex3f(-5.0f, 5.0f, 0.0f); // Bottom Left
glTexCoord2f(1.0f, 1.0f); glVertex3f(5.0f, 5.0f, 0.0f); // Bottom Right
glTexCoord2f(1.0f, 0.0f); glVertex3f(5.0f, -5.0f, 0.0f); // Top Right
glTexCoord2f(0.0f, 0.0f); glVertex3f(-5.0f, -5.0f, 0.0f); // Top Left
glEnd();
glDisable(GL_BLEND);
*/
```

As you can see above I have remarked out a heap of stuff and it seems to be running ok without crashing.

I really think its some sort of stack error. I cant even see where the code is breaking because it says no source code available for the current location.

As soon as I unremark any of the remarked code, the error happens again.

Anyone please help.

Thanks

-Al

PS: Full code at http://www.hstuart.dk/paste/view.aspx?id=feddb667-fc12-4b6a-917d-68698f8ffa30