Subtracts x,y,width,height of a-b.
subtractOffset({x:100,y:100,width:100,height:100}, {x:10, y:20, width: 30, height: 40});// Yields: {x: 90, y: 80, width: 70, height: 60 } Copy
subtractOffset({x:100,y:100,width:100,height:100}, {x:10, y:20, width: 30, height: 40});// Yields: {x: 90, y: 80, width: 70, height: 60 }
If either a or b are missing x & y, 0 is used
a
b
Subtracts x,y,width,height of a-b.
If either
aorbare missing x & y, 0 is used