render()
{

	// push current modelview matrix onto stack
	// note, I assume the modelview matrix is already set as expected, whether it be in
	// world space, or transformed into eyespace by the camera or whatever
	glPushMatrix();

	// note, if this was a class then you would probably have this matrix defined inside it, and have
	// functions to alter it, but I just do these things here to make the example easier to read
	CMatrix rectMatrix;
	rectMatrix.location = pivot.position;		// set origin to position of pivot
	rectMatrix.rotate(1, 0, 0, 45.0f);			// rotate 45 degrees around X axis

	// note, the group of points should be defined in object space
	glMultMatrix(rectMatrix.matrix);			// multiply/combine with current opengl modelview matrix
	OnDrawGroupOfPoints();				// draw group of points

	// restore previous modelview matrix from stack
	glPopMatrix();
}