The constraint function for when constraint is set to "x" or "y"
The highest possible X value
The lowest possible X value
The highest possible Y value
The lowest possible Y value
The snap resolution when constraint is set to "snap"
The X position of the point
The Y position of the point
Update (Xn, Yn) for n
How to constrain this line? options "none", "snap", "x", "y"