New Programmer working with cmu cam2

[pbrules15]

I am trying to learn programming over the summer so when robotics starts up again, I will have more understanding of the camera.

I have the camera tracking and locking on to the target, but I cannot figure out how to find the angle of the light the camera is looking at. Also, could you tell me what the following means:

mx - The middle of mass x value
my - The middle of mass y value
x1 - The left most corner’s x value
y1 - The left most corner’s y value
x2 - The right most corner’s x value
y2 -The right most corner’s y value

I don't understand what they are trying to say with "left/right most corner's x/y value"

Thank you!