There’s no draw function in renoise.ViewBuilder(). You can load images, see therenoise.ViewBuilder.API.lua file in renoise 3.0.1\resources\scirpts\documentation
But you’ll have to give more details about what you’re doing.
If you’re proficient enough, you could have any gui in a external program, like a web browser for example using sockets, a few people have written a bridge for it in some way.
Do you mean you want a scope? Plenty of scope vsts…
from the introduction.lua in the same folder:
What's *NOT* possible with Renoise tools:
- Change Renoise's existing behaviour. Like, you can't make all C-4s in the
pattern editor yellow instead of white. You can write your own pattern
editor, but not change the existing one.
- Realtime access. Except for OSC and MIDI IO, you can't write scripts that
run in the audio player. In other words, you can not script new realtime
DSPs - yet. But you can, for example, write a tool that creates samples or
manipulates existing samples. This limitation might change in the future.
For now you can make a VST, AudioUnit, or LADSPA/DSSI plug-in.
what you should do instead, since you want a scope (you should have said that clearly from the start :p) is find an opensource vst or use vsts like protoplug or reascript