--- a
+++ b/Application/Examples/BikeSpring/Model/AlphaLimit.m
@@ -0,0 +1,6 @@
+function [alphalim] = AlphaLimit(xmin,x,xmax,d)
+
+% This function finds the allowable limits of alpha when vector alpha*d originating
+% at point x must be limited within the box constraints xmin and xmax
+alphalim[1] = min((xmax-x)/d);
+alphalim[2] = max((x-xmin)/d);