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A really simple NURBS library based on libigl.libigl is a simple C++ geometry processing library, and I use it mainly for displaying the NURBS curve and surface.

Existing functions:

1. compute points on curve or surface with parameters
2. display NURBS curve and surface by libigl

to be continued:

1. readIO and writeIO
2. knot insertion and knot removal
3. degree elevation and degree reduction
4. NURBS curve and surface fitting
5. T-Spline (it's hard ...)

This project's cmake structure is fromlibigl/libigl-example-project, which is a blank project example showing how to use libigl and cmake.

Then build, run and understand thelibigltutorial.

After downloading and installing libigl, you need to add the Path of libigl to this project by modifyingFindLIBIGL.cmake

find_path(LIBIGL_INCLUDE_DIR igl/readOBJ.h    HINTS        ENV LIBIGL        ENV LIBIGLROOT        ENV LIBIGL_ROOT        ENV LIBIGL_DIR    PATHS        ${CMAKE_SOURCE_DIR}/../..        ${CMAKE_SOURCE_DIR}/..        ${CMAKE_SOURCE_DIR}        ${CMAKE_SOURCE_DIR}/libigl        ${CMAKE_SOURCE_DIR}/../libigl        ${CMAKE_SOURCE_DIR}/../../libigl        D:/Program\ Files/libigl # you can add the path like this        /usr        /usr/local        /usr/local/igl/libigl    PATH_SUFFIXES include)

Compile this project using the standard cmake routine:

mkdir buildcd buildcmake ..make

This should find and build the dependencies and create aNURBS_bin binary.

From within thebuild directory just issue:

./NURBS_bin

A glfw app should launch displaying a Torus surface.

1. Cylindrical surface
2. Torus surface