changes

luprex/core/lua/basics.lua

@@ -9,3 +9,13 @@ function NilIsZero.__newindex(t,k,v)
   if v~=nil and v~=0 then rawset(t,k,v) end
   end
 
+function seq(a,b,c) return a<=b and b<=c end
+
+function bound(a,b,c)
+  if b<a then return b elseif b>c then return c else return b end
+  end
+
+function lerp(a,b,c,d,e)
+  return d+(e-d)*(a-b)/(c-b)
+  end
+