Change perpendicular-distance constraint to something more intuitive to setting parallel distance (#110)

* some clean up

* Change perpendicular-distance constraint to something more intuitive to setting parallel distance

* delete

* add back

* force rename

* change name back

* try renaming again

src/components/AvailableVarsHelpers.tsx

@@ -79,6 +79,7 @@ function stringSplice(str: string, index: number, count: number, add: string) {
   return str.slice(0, index) + (add || '') + str.slice(index + count)
 }
 
+// what a terriable name
 export function useCalc({
   value,
   initialVariableName: valueName = '',