flubberpp

This is a C++ port of the flubber (https://github.com/veltman/flubber) shape interpolation library.

Contents

• flubberpp library: C++ only that provides shape interpolation, but no visualization
• a Qt5 demo app: a demo app that uses flubberpp library to render interpolations

Requirements

• C++17 compiler
• Qt5 development libraries: only if you want ot build the demo app

Limitations

Currently only single shape to single shape interpolation is implemented.

Build

mkdir build
cd build

# flubberpp library only
cmake .. -DCMAKE_BUILD_QT_DEMO=No
# flubberpp library and demo app
cmake ..

make

# run demo
./qtdemo/qtdemo

Usage

#include "flubberpp.h"

One to One interpolation

// VectorShape is a standard std::vector<flubberpp::Point>
flubberpp::VectorShape from({ {0,0}, {100,0}, {100,100}, {0,100} });
flubberpp::VectorShape to({ {0,50}, {100,50}, {50,100}, {0,50} });

// interpolator
flubberpp::SingleInterpolator interp(from,to);

// get the interpolated shape at some point in time,  between 0 and 1 using at()
const auto &s = interp.at(0.5);

// traverse interpolated shape and draw line segments
for (const auto &p: s) {
    drawLineTo(p.x,p.y);
}

One to Many/Many to One interpolation

NYI

M to N interpolation

NYI

Embedding

Take the contents of the lib folder and add it to your project. If you are using CMake for building, you can reuse the included CMakeLists.txt.

Author

Saïd Lankri

Credits

• Noah Veltman for the original flubber library
• Mapbox for earcut and its C++ port