SplineLib
Library for manipulating 2D and 3D splines. Functionality included:
- Creation from Bezier, Hermite, and Catmull-Rom forms
- Creation of an array of splines from an array of points and tension value, or Bezier hull points, or Hermite tangents.
- Creation of arcs and circles
- Evaluation of position, velocity, acceleration, curvature, and tangent frame
- Length measurement
- Finding bounds
- Offsetting (e.g., for stroking) and reversing splines
- Splitting and re-joining of single splines
- Subdivision of runs of splines either evenly, for flatness, or to be linear in arc length
- Finding the closest point on a run of splines
- Finding where runs of splines intersect, or a run of splines self-intersects
- Helpers for advancing a point along a spline at some given velocity
To build and run the test app:
c++ --std=c++11 Splines.cpp SplinesTest.cpp -o splines && ./splines
Or add those files to your favourite IDE.
Examples
Splines from Points:
Fast and Conservative Bounds:
Closest Point on Spline:
Spline Intersections:
Moving Points on Splines:
Subdivision and Joining:
