to create your custom UI and place custom controls you can chose between a grid system or exact pixels.
The instruments background image is called “wallpaper”. Its’ the basic background texture where all UI elemnts (knobs, buttons etc) get layered on top. We can for example create a realistic synth surface containing placeholders and “sockets” for all your knobs and buttons with detailed shadows, light reflections etc. After on we create the individual knobs & buttons and place those controls exactly inside the designated sockets and areas by layering them on top of our background wallpaper just like we would do within our graphic software when designing a complete GUI.
Like in other programming languages in KSP there are variables, arrays and constants. These can only be declared inside the on init callback but can be used throughout the whole script then.
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The Basic code structure is very simple. There are several callbacks where you basically put in your code. At least you need the init callback
on init ... end on The code inside callbacks gets executed when specific events happen. For example playing a note on your keyboard always executes the “on note” callback.
Before you start scripting you should create a resource container where you put in all your files you need for your instrument (e.g graphic files or impulse responses etc.)