Get pattern

[Lakelimbo]

Hello! So I'm not an expert on JS, and I'm trying to figure out how to get a visualization in pattern, just like the trackers, if possible.
(Preferentially with a code snippet, I usually understand those better D: )

[gs11]

This library is for playback only. I'm not personally familiar with other libraries providing such functionality.

[deskjet]

Sorry for the late response. The library behind chiptunejs libopenmpt can do everything you'd expect from a tracker. It's the same code that OpenMPT is built upon. Exposing the functionality to JS is not always straight forward unfortunately. The first step is always to check libopenmpt C-API which we can call from JS.

You can find functions like openmpt_module_get_current_pattern and openmpt_module_format_pattern_row_channel that sound like they're be related to what you're trying to do.

A call from JS would look something like that:

libopenmpt._openmpt_module_get_current_pattern(this.currentPlayingNode.modulePtr);  

It should return the index of the currently playing pattern. You can use that to go further.

By default only a limited number of functions are exposed via Emscripten to JS. So you might have to look into building a custom version of libopenmpt.js from the libopenmpt source. Make sure to use the Makefile based build system.