--- a/pkg/mesh/triangulation.go	Sat Aug 06 00:46:21 2022 +0200
+++ b/pkg/mesh/triangulation.go	Sat Aug 06 02:09:57 2022 +0200
@@ -26,6 +26,9 @@
 	"gonum.org/v1/gonum/stat"
 )
 
+// Triangulation represents a triangulation
+// consisting of its vertices, the convex hull,
+// the triangles and a half edge representation.
 type Triangulation struct {
 	Points     []Vertex
 	ConvexHull []Vertex
@@ -40,6 +43,12 @@
 	return &Triangulation{points, t.convexHull(), t.triangles, t.halfedges}, err
 }
 
+// EstimateTooLong estimates an edge length which is too long
+// to be a real triangle in the triangulation.
+// It is assumed that the triangles in this mesh are
+// more or less equally sized. If an edge length is more
+// than the 3.5 of the standard dev of the medium length
+// it is considered as too long.
 func (t *Triangulation) EstimateTooLong() float64 {
 
 	num := len(t.Triangles) / 3
@@ -69,6 +78,9 @@
 	return 3.5 * std
 }
 
+// ConcaveHull constructs a concave hull for this mesh,
+// Triangles that are considered as too large based on
+// the EstimateTooLong estimation are removed from the border.
 func (t *Triangulation) ConcaveHull(tooLong float64) (LineStringZ, map[int32]struct{}) {
 
 	if tooLong <= 0 {
@@ -239,6 +251,8 @@
 	return polygon, removed
 }
 
+// TriangleSlices returns the indices of the triangles
+// of the mesh as slices og length three.
 func (t *Triangulation) TriangleSlices() [][]int32 {
 	sl := make([][]int32, len(t.Triangles)/3)
 	var j int
@@ -249,6 +263,7 @@
 	return sl
 }
 
+// Tin creates a TIN out of this triangulation.
 func (t *Triangulation) Tin() *Tin {
 
 	min := Vertex{math.MaxFloat64, math.MaxFloat64, math.MaxFloat64}