array-access | PHP multi array access | Web Framework library

I have been working through WebGL tutorials like webglfundamentals and have run into a stumbling point - I believe that I will need to use a texture that I create to pass information directly to the fragment shader, but I can't seem to index the texture properly.

The goal is to pass information about light sources (location and color) that will be factored into the fragment color. Ideally this information is dynamic in both value and length.

I've created a simplified version of the problem in this fiddle: WebGL - Data Texture Testing

Here's some of the code.

In a one-time setup we create a texture, fill it with data, and apply what seem to be the most fool-proof settings on that texture (no mips, no byte packing issues[?])

So, this is how my array is structured:

I try to implement a function call in a custom grammar (plus a similar array-access operator):

I've built my own Yaml Parser using a couple of more advanced stuff like abstracts in haxe in order to better understand how everything works, and I've hit yet another wall.

The important part is an abstract, abstract YamlMap (StringMap>), which acts as a container for my data. A "node" can either be a string or another yamlmap, deeper into the tree.

This YamlMap has multiple methods to get data, like getMap(key):YamlMap and getString(key):String, and a dynamic access one, getDynamic(key):Dynamic.

Unfortunately, it seems that only one @:arrayAccess will work be abstract or I'm missing something. It also seems that you cannot "arrayAccess" a dynamic object with strings, or at least the compiler is preventing me from doing it.

So, this works: data.getMap('test_node').getMap('sub_node1').getString('value2') But this doesn't: data['test_node']['sub_node2']['value2']

If I set getDynamic as arrayAccess, it tells me sub_node2 should be an int. But if I set both getMap and getString as arrayAccess, it'll always ever call the first arrayAccess-labeled method. So it either fails when trying to get "value" (which is a string but the code attempts to get a map) or doesn't compile because, I'm guessing, it's trying to access a character from a string and not a map position.

So, my guess here is, related to this manual entry, that arrayAccess on anything not abstract is locked to an int, thus the dynamic object refuses to be accessed with a string.

A possible solution I can think of is to, instead of using a dynamic value, to return some kind of abstract that will "flatten" to the correct type upon casting. Would there be any other methods of achieving stringified array access on a dynamic map?

Note: This is, in a way, out of curiosity as the current method with different calls for maps and strings works well enough for everyday use. I also know of the existing yaml haxelib but this is as much a learning experience as it is an attempt to replace the haxelib which can sometimes be buggy.

Here's a Pastebin of the YamlMap abstract for anyone interested.