NanoGUI Experiments

Building

Python

Set up virtual environment providing nanogui Python bindings:

python3 -m venv venv
source venv/bin/activate
(venv) pip install -r requirenments.txt

Run helloworld examples:

(venv) python3 nanogui_helloworld.py
(venv) python3 nanogui_custowidget.py

C++

Configure build with CMake:

cmake -B build -S .

(This will checkout the NanoGUI library from GitHub into the build directory. You can use -DNANOGUI_REPO=<repo path or URL> to change from where Git will retrieve the repository.)

Build the examples:

cmake --build build

Run hellworld example:

./build/nanogui_helloworld

Knobs Example

Python

(venv) python3 nanogui_knobs.py

C++

./build/nanogui_knobs

Key and Mouse Bindings

Mouse click-and-drag knob	coarse in-/decrement	+/- one 100th / pixel
Shift + mouse click-and-drag knob	fine in-/decrement	+/- 0.1 / pixel
Mouse wheel scroll over knob	coarse in-/decrement	one 100th / click * 2.0
Shift + mouse wheel scroll over knob	fine in-/decrement	+/- 0.1 / click
Ctrl + left click on knob	set to default value
Up/down key while mouse over knob	coarse in-/decrement	+/- one 100th
Shift + up/down key while mouse over knob	fine in-/decrement	+/- 0.1
Page up/down key while mouse over knob	big in-/decrement	+/- one 10th
Mouse click on value entry up/down arrow	fine in-/decrement	+/- 0.1
Mouse wheel scroll over value entry	fine in-/decrement	+/- 0.1 / click
Return/Enter while editing value entry	accept & set value
Escape key	quit

Notes

• No support for scaling or re-layouting on window resize yet.
• Only the knob value gauge color can currently be specified on instantation, the knob gradient and outline colors are currently hard-coded.