Evaluates the ramp function.
x >= 0
x
input value
function value
var v = ramp( 3.14 ); // returns 3.14
var v = ramp( -3.14 ); // returns 0.0
var v = ramp( NaN ); // returns NaN
Evaluates the ramp function.
Notes
x >= 0
, the function returnsx
; otherwise, the function returns zero.