[Bugsy]

Supermache, clamp is good when the input value can fall below or above a desired range.

So suppose you want to only allow values between 0 and 100, but the input value can range from -100 to 1000. Doing clamp( value , 0 , 100 ) will ensure the floor value is 0, ceiling value is 100, and if the value falls between those values, clamp returns that value.

clamp( -100 , 0 , 100 ) = 0
clamp( 0 , 0 , 100 ) = 0
clamp( 55 , 0 , 100 ) = 55
clamp( 100 , 0 , 100 ) = 100
clamp( 1000 , 0 , 100 ) = 100