Line

Draws a band, rope or tether from this object to another one, with both ends following them as they move. Use it for slingshot bands, a grappling rope, a leash or a power cable. It can get thinner and change colour as it stretches.

Settings

Setting	What it does
to	The object at the other end, such as a slingshot's pouch. Pick it, or drag it in from the Hierarchy.
from	Where the line starts on this object's box, x and y from 0 to 1. 0.5, 0.5 is the centre; 0 is the left or top.
to point	Where the line ends on the other object's box, also 0 to 1.
width	slack: the width in pixels when it's loose. tight: the width once it's stretched to the stretch length. 0 keeps the same width all the time.
stretch length	How long the line is, in pixels, when it counts as fully stretched. From there on it's at its tight width and colour. 0 means it never changes.
colour	The line's colour and opacity when slack.
tight colour	The colour it blends to as it stretches. Leave it empty to keep one colour.

Example: a slingshot

1. Make the two prongs and the pouch as separate objects.
2. Add a Line to the back prong and to the front prong, both with to set to the pouch.
3. Set from to the tip of each prong (a y near 0).
4. Set stretch length to how far the pouch can be pulled, and pick a tight colour like red.

The line is drawn just after its own object. So the back prong's band sits behind the pouch and the front prong's band sits in front, and the shot looks like it's held between them.

Good to know

• The line is only drawn, it doesn't push or pull anything. To launch a shot, use a Drag Control with Physics.
• Games only. Works in Preview and on both Wear OS and Apple Watch.