Watering Can: Controllable Water Level

[jackthias]

• Water level should rise and fall based on internal variable.
• Use standard water prefab for rendering water level.
• Mask water mesh to the shape of the can. Water shouldn't stick out the sides of the can.
• There should be a minimum and maximum value for the water level, and accordingly the water should not rise above the top of the can or fall below the bottom of it.
• There should be a Boolean function that returns true if the water level is too low to be poured.