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boxstep

The boxstep function is somewhere between step and smoothstep. It is the result of the convolution of a box filter with a step edge. The width of the box filter is (b - a) and the slope of the ramp is 1/width.

boxstep

boxstep(a,b,x)
Returns 0 when (x <= a), 1 when (x >= b), a linear transition from 0 to 1 when (a < x < b), or (-1) on error (a == b).
COPY/// boxstep(a,b,x)
//
//  Returns 0 when (x <= a), 1 when (x >= b), a linear transition
//  from 0 to 1 when (a < x < b), or (-1) on error (a == b). 
//
//      a           lower bound, real
//      b           upper bound, real
//      x           value, real
//
/// GMLscripts.com/license
{
    var p;
    if (argument0 == argument1) return (-1);
    p = (argument2 - argument0) / (argument1 - argument0);
    if (p <= 0) return 0;
    if (p >= 1) return 1;
    return p;
}

Contributors: xot

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