Custom GUI for your Blender add-ons using Dear ImGui

Last update: Dec 25, 2022

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Overview

Dear Imgui for Blender

Use the infamous Dear ImGui library directly in your Blender scripts! This means custom GUI drawing in your operators:

Normally custom UI drawing in Blender is done using the binding of OpenGL from the bgl module as well as shader-related objects from the gpu module, but this is really low-level. Dear ImGui is a now traditional tool used for quick debugging UIs that provides a much more comfortable API.

This repository provides backend code and examples to run Dear ImGui within Blender. This may be used for constant overlays or interactively during modal operators.

Installation

Prior to using the code from this repository, we will install Dear ImGui's Python binding. Beware that it must be installed in Blender's Python, not in system's Python so you must call pip through Blender's python like so:

REM An example on Windows
cd "C:\Program Files\Blender Foundation\Blender 2.91\2.91\python\bin"
.\python.exe -m pip install imgui

# An example on linux
cd /usr/lib/blender/2.91/python/bin
./python3.7m -m pip install imgui

If this fails, start over using a cmd in administrator mode. You may have to adapt the path after "cd".

Examples

To quickly try out examples download ImguiExamples.zip from the last release, don't unzip it and install it as an add-on.

To go further, hack on operators.py and overlays.py and check out pyimgui's documentation!

To embed this into your add-on, you just have to include blender_imgui.py in your add-on's directory.

License

This project has a whole is distributed under the terms of the GPLv3 license. See individual file's notices for more detailed licensing info.

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Comments

Updated blender_imgui.py to support global framerate max cap

Hi @eliemichel !

I Updated the blender_imgui.py to support global framerate max cap, essentially what Im doing is checking if floor(timeSinceEpoch/framerate) is the same as it was last time that draw was called, if it is then we know that enough time hasnt passed to make it worthwhile to do another render.

The motivation was that sometimes the draw function gets called faster than whats seemingly necessary (it gets drawn faster than the modal function in a modal operator), stealing computation time from other tasks, as the overlays probably dont need to be called 120 frames per second it makes quite a lot of sense to me to try and limit it

opened by ItsCubeTime 1
How do I change the framerate that children of blender_imgui.BlenderImguiOverlay update in? By default they slowdown Blender A LOT, making the viewport sluggish

How do I change the framerate that children of blender_imgui.BlenderImguiOverlay update in? By default they slowdown Blender A LOT, making the viewport sluggish

opened by ItsCubeTime 1

Releases(v1.0.0)

v1.0.0(Dec 25, 2020)

To include in your add-on, download blender_imgui.py

To play with an example of how to use it, get ImguiExample-v1.0.0.zip and install it as an add-on in Blender.
Source code(tar.gz)
Source code(zip)
blender_imgui.py(16.03 KB)
ImguiExample-v1.0.0.zip(9.19 KB)

Owner

Elie Michel

Research in Computer Graphics.

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Custom GUI for your Blender add-ons using Dear ImGui

Related tags

Overview

Dear Imgui for Blender

Installation

Examples

License

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