rendertarget_id(3)

💖 NAME 💖

okay so bestie, welcome to rendertarget_id(3) from the Arcan Lua API ✨ — the function that assigns a numeric identifier to a rendertarget. That's it, that's the gig. 💅

🦋 SYNOPSIS 🦋

id or nil
rendertarget_id( vid:rtgt )
rendertarget_id( vid:rtgt, int:id )

🎀 DESCRIPTION 🎀

This one is intended for rendering cases where a shader needs to distinguish between the destination rendertarget. The example the page gives is stereoscopically rendering a side-by-side packed textured source without manually managing multiple pipelines. Iconic, honestly. 🌈

So what do you do? Create two rendertargets — one via define_rendertarget and the other via define_linktarget — then give each one a unique identifier with the help of this function, rendertarget_id. After that, write your shader so it does the distinction via the builtin int uniform rtgt_id. Periodt. 💜

There are two forms of this function, and they're exactly what they sound like: one retrieves the current identifier, and the other updates it. If the vid specified with rtgt does not exist, nil will be returned. No cap, that's the rule. 😭

🌈 SEE ALSO 🌈

• targetcontrol

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that's the page, bestie 🫶 — source/version: Arcan Lua API, date: October 2026, and the star of the show is rendertarget_id(3). mwah 💋