Crosshair Grapple Indicator

[SHWAN]

There should be an indicator on whether or not you're close enough to the point you're looking at to grapple it.
I think the best way to implement such a system would be by having the crosshair change in someway (colour, shape, ect) while the point your looking at is within grapple distance.

 

[SHWAN]

Perhaps it could also change based on how far you are from the point your looking at, (gradual colour/shape/ect change)