added edge_aligned_sections

src/edge_aligned_sections.scad

@@ -0,0 +1,18 @@
+function edge_aligned_sections(shape_pts, edge_path) = 
+    let(
+        start_point = edge_path[0],
+        base_leng = norm(start_point),
+        scaling_matrice = [
+            for(p = edge_path) 
+            let(s = norm([p[0], p[1], 0]) / base_leng)
+            m_scaling([s, s, 1])
+        ]
+    )
+    [
+        for(i = [0:len(edge_path) - 1])
+        [
+            for(p = shape_pts) 
+            let(scaled_p = scaling_matrice[i] * [p[0], p[1], edge_path[i][2], 1])
+            [scaled_p[0], scaled_p[1], scaled_p[2]]
+        ]
+    ];