Runtime Exception while populating stl vector from inside GlutCallBack functions

OpenGL OpenGL: Basic Coding
1

Hi

I have a struct Point with two values X and Y to save the value mouse click positions.

struct Point
{
public:
	int x, y;
	Point(){}
	Point(int a, int b)
	{
		x = a;
		y = b;
	}
};

And I have this global declaration of vector

vector<Point> P;

So when I use this vector to populate random points in functions that are called from main() and not glutcallbacks it works fine.

But when I use the same globally declared vector to populate random points in glutCallBack functions like glutDisplayFunc or glutMouseFunc it compiles but gives me an Unhandled Exception Error


void display(void)
{
	
		P.push_back(Point(currentX, currentY));
	
	int i;
	for (i = 0; i <= ImageH/2; i++) 
		setFramebuffer(i, i, 0, 1.0, 1.0);

	drawit();
}

When I break the exception from VS, it takes me to std::vector header to a location

#if _VECTOR_ORPHAN_RANGE.

I’m not sure if I’m missing anything. Any help would be greatly appreciated. Thanks in advance! :slight_smile: