Dr LUT - Lookup Table Generator

Online tool written in C/C++ that generates waveforms and exports them as arrays.

Online version: https://ppelikan.github.io/drlut

Features:

• live editing of waveform formula (C/C++ compatible syntax)
• available waveform presets:
  • zeros, sin, cos, tan, ctan, sawtooth, triangle, white noise, gauss, hamming, hann, bartlett, flat top, sigmoid
• available output array formats:
  • signed: int8, int16, int32, float (double)
  • unsigned: uint8, uint16, uint32
• configurable amplitude and y-axis offset
• selectable int range behaviour:
  • overflow or saturation
• selectable array output format:
  • hexadecimal or decimal

---

---

todo:
* add array size computation in bytes/kbytes/megabytes and widget to display it
* "warning: 'BeginPlot' is deprecated"
* fix broken comments for formulas containing `\n` characters (buildLut() function)
* NaN and INF warning should be shown if detected (before type casting)
* fix clipboard (Ctrl+C and Ctrl+V) on web target
* add include guards to generated headers

Building

Portable version (use this for debuging):

Tool installation:

sudo apt-get install gcc make libglfw3-dev libgles2-mesa-dev
git clone https://github.com/ocornut/imgui.git
git clone https://github.com/epezent/implot.git

Building:

cd drlut
make portable
./build/portable/app_executable

Web WASM Emscripten version (for release deployment):

Tool installation:

sudo apt-get install cmake python3
git clone https://github.com/emscripten-core/emsdk.git
cd emsdk
git pull
./emsdk install latest
./emsdk activate latest

Building:

cd drlut
source 'path_to_your_emscripten_installation/emsdk/emsdk_env.sh'
make web
make serve