🎨 RNDX

Draw rounded shapes with ease. RNDX is a lightweight and efficient library designed to make drawing rounded shapes simple, fast, and visually stunning.

Using Shader Model 3.0 No longer uses SM 3.0 (length/fwidth) for AA as there was a bug with some edgy cases, RNDX provides perfect anti-aliasing with no performance hit, allowing you to create beautiful interfaces and visuals with ease.

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Note

Currently it only works on dev branch, it used to work on x86-64 but Rubat reverted the changes, so you can only use it on dev currently.

✨ Why RNDX?

• Blazing Fast Performance: Optimized for speed, RNDX is incredibly lightweight and efficient. (It will get even faster once we get mat:SetFloat4()!)
• Perfect Anti-Aliasing: Enjoy smooth, pixel-perfect corners with no performance hit.
• Simple & Intuitive: No complex objects or states—just call a function and draw!
• Seamless Integration: Works flawlessly inside 3D2D and Panel:Paint* functions without any hacks.

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🛠️ Get Started

Note

Currently it only works on dev branch, it used to work on x86-64 but Rubat reverted the changes, so you can only use it on dev currently.

1. Download RNDX.tar.gz & rndx.lua from GitHub releases.
2. Add the content of RNDX.tar.gz to your gmod client garrysmod folder. (Temporarily until we get thirdparty support!)
3. AddCSLuaFile & include rndx.lua.
4. Voilà! You're ready to draw rounded shapes with ease. 🎉

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📐 Usage

hook.Add("HUDPaint", "RNDX Example", function()
    local flags = RNDX.NO_TL + RNDX.NO_TR + RNDX.SHAPE_IOS
    RNDX.Draw(10, 100, 100, 200, 200, nil, flags + RNDX.BLUR)
    RNDX.Draw(10, 100, 100, 200, 200, Color(255, 0, 0, 150), flags)
    RNDX.DrawOutlined(10, 100, 100, 200, 200, Color(0, 255, 0), 10, flags)
end)

📚 Documentation

Flags

• RNDX.NO_TL: Disables top-left corner.
• RNDX.NO_TR: Disables top-right corner.
• RNDX.NO_BL: Disables bottom-left corner.
• RNDX.NO_BR: Disables bottom-right corner.
• RNDX.BLUR: Use blur for the shape.

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• RNDX.SHAPE_CIRCLE
• RNDX.SHAPE_FIGMA <-- Default
• RNDX.SHAPE_IOS

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Functions

RNDX.Draw(rad, x, y, w, h, col, flags)

RNDX.DrawOutlined(rad, x, y, w, h, col, thickness, flags)

RNDX.DrawTexture(rad, x, y, w, h, col, texture, flags)

RNDX.DrawMaterial(rad, x, y, w, h, col, mat, flags)

RNDX.DrawCircle(x, y, r, col, flags) <-- Just a wrapper for RNDX.Draw with RNDX.SHAPE_CIRCLE.

RNDX.DrawCircle(x, y, r, col, thickness, flags)

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🚀 Why Choose RNDX Over Alternatives?

Feature	RNDX	Circles	paint	melonstuff
Speed	⚡ Extremely Fast	🐌 Slow with many circles	⚡ Fast	🐌 Slow
Anti-Aliasing	✅ Perfect, no performance cost	❌ None	❌ Poor (Source Engine AA)	❌ None
Ease of Use	🎯 Simple & Minimal	🎯 Simple	🧩 Complex & Bloated	🎯 Easy
Documentation	📖 Clear & Concise	📖 Good	❌ Overwhelming & Undocumented	📖 Good

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📜 License

RNDX is open-source and free to use. Feel free to contribute or report issues on GitHub!

Make sure to give credits!

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🌟 Credits

• ficool2 - For sdk_screenspace_shaders & finding out that we can use shaders in source engine games!
• Rubat - For allowing us to use shaders in Garry's Mod!
• Svetov/Jaffies/FriendlyStealer - For lots of help throughout the development of RNDX! Also suggested multiple stuff to improve the performance!
• Shadertoy Rounded Code
• Shadertoy Blur Code
• And AI because I don't understand how shaders work!

RNDX: Because drawing rounded shapes should be simple, fast, and beautiful. 🎉