lerp_curb()

///@func    lerp_curb(val1, val2, amount, limit)
///@desc    Returnes a lerp'ed result which is cut off at a certain value.
///         Can be useful to avoid lerp() taking long to reach target value because of decay.
///
///@param   val1    Starting value
///@param   val2    Target value
///@param   step    Step (0 - 1)
///@param   limit   Value at which the lerp is cut off (returning target value)

var _start, _end, _step, _limit, _output;

//Init arguments
_start  = argument0;
_end    = argument1;
_step   = argument2;
_limit  = argument3;

//Lerp
_output = lerp(_start, _end, _step);

//If lerped value is beyond limit value, return target value
return (abs(_end - _output) <= abs(_end - _limit)) ? _end : _output;