Is there an algoritm to calculate the sum of the point in a figure on a plain?
Look the example:
http://img197.exs.cx/my.php?loc=img1...ntitled0zx.jpg
I have the 4 initial points...how can i calculate it?
Or if i have more than 4 pints...like this one
http://img197.exs.cx/my.php?loc=img197&image=bit4ab.jpg