docs(geom-splines): update readme

packages/geom-splines/README.md

@@ -43,12 +43,20 @@ yarn add @thi.ng/geom-splines
 
 ### Polygon to cubic curve conversion
 
-There're currently two ways to convert a polygon into a sequence of cubic curve segments. Both modes support customizable curve tightness.
+Currently, there're two ways to convert a polygon into a sequence of
+cubic curve segments. Both modes support customizable curve tightness.
+
+Furthermore, both conversion modes can be instructed to use uniformly
+scaled control point tangents: In uniform mode, the tangents have a
+uniform, user defined length, resulting in equidistant control points
+for each poly vertex. In non-uniform mode, each tangent is scaled by the
+length of its parent poly edge.
 
 #### Poly vertices as control points
 
 In this mode the curve always goes through the midpoints each polygon
-edge, with the original polygon vertices being used to compute control points.
+edge, with the original polygon vertices being used to compute control
+points.
 
 | Proportional tangent scale                                                                            | Uniform tangent scale                                                                              |
 |-------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------|
@@ -59,12 +67,7 @@ edge, with the original polygon vertices being used to compute control points.
 In this mode the curve always goes through the original polygon vertices
 and additional control points are created via symmetric tangents at each
 poly vertex. The tangents themselves are computed via the bisector of
-each vertex corner.
-
-In uniform mode, the tangents have a uniform, user defined length,
-resulting in equidistant control points for each poly vertex. In
-non-uniform mode, each tangent is scaled by the length of its parent
-poly edge.
+each vertex corner, taking into the convexity of each poly vertex.
 
 | Proportional tangent scale                                                                            | Uniform tangent scale                                                                              |
 |-------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------|