Simulating a Parser in Twine? [split from The Art of Language Agnostic Design]

Authoring General Design Discussions
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I think I see what you are getting at now. This is for SugarCube.

You first have to set a variable in a passage titled StoryInit. Let’s make the door closed by default.

<<set $doorOpen to false>>

Now for the link… put this in your Start page:

<<link "Open the door">>
	<<if $doorOpen eq false>>
		<<set $doorOpen to true>>
	<<elseif $doorOpen eq true>>
		<<set $doorOpen to false>>
        <</if>>
<</link>>

Note that this alone with just swap the variable silently and endlessly. There are a lot of ways to update the passage—either by refreshing it, by going to a new passage, or by targeted replacement of a div.

Here is one way to make it refresh the current passage with ‘goto’ then print the $doorOpen variable. It replaces the Start passage above.


<<link "Open the door">>
	<<if $doorOpen eq false>>
		<<set $doorOpen to true>>
	<<elseif $doorOpen eq true>>
		<<set $doorOpen to false>>
    <</if>>
<<set $this to passage()>>
<<goto $this>>
<</link>>


<<if $doorOpen eq true>>The door is open/You open the door.<<else>>The door is closed.<<endif>>
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