Have not looked at your example - short on time here - but here is one strategy which You have already touched the shores of - use an array. Info about using arrays here.
Create an empty array. e.g. sceneChecker = []
=========================
Then, as You have suggested use hypeDocument.sceneInfo to:
Get the total count of all scenes in the Hype document.
Then on each “Scene Load” check the scene name with the names in the array.
If the scene name is not in the array add it to the array ( “push()” ).
Check the array length if the array length = the sceneCount You are home Baby!
Again all the references to using arrays mentioned in the paragraph just above are covered in the “here” link in the first paragraph.
===============================
Example of checking for a value in an array - doing this on the fly so consider this general concept:
We have a variable “sceneName” with the current scene name already placed into it (e.g. “Part 3”)
We have our array “sceneChecker” with other scene names placed into it (we’ve already visited those scenes). This array currently contains [“Intro”, “Part 1”, “Part 2”, “Epilogue”]
“On Scene Load”
<script>
function checkSceneName() {
var n = sceneChecker.indexOf(sceneName);
if (n == -1) {sceneChecker.push(sceneName);}
}
</script>
"indexOf" returns “-1” if the item is not found in the string (i.e. the array), so we will add “Scene 3” to the array (i.e. the “push” method).
Have not tested anything - just a concept! 