List <TreeSegment> BuildSegments(TreeData data, float fromRadius, float toRadius, Vector3 normal, Vector3 binormal)
{
var segments = new List <TreeSegment>();
var points = new List <Vector3>();
var length = (to - from).magnitude;
var bend = length * (normal * data.GetRandomBendDegree() + binormal * data.GetRandomBendDegree());
points.Add(from);
points.Add(Vector3.Lerp(from, to, 0.25f) + bend);
points.Add(Vector3.Lerp(from, to, 0.75f) + bend);
points.Add(to);
var curve = new CatmullRomCurve(points);
var frames = curve.ComputeFrenetFrames(data.heightSegments, normal, binormal, false);
for (int i = 0, n = frames.Count; i < n; i++)
{
var u = 1f * i / (n - 1);
var radius = Mathf.Lerp(fromRadius, toRadius, u);
var position = curve.GetPointAt(u);
var segment = new TreeSegment(frames[i], position, radius);
segments.Add(segment);
}
return(segments);
}
