update doc

docs/lib-in_polyline.md

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+# in_polyline
+
+Checks wether a point is on a line.
+
+**Since:** 1.3
+
+## Parameters
+
+- `line_pts` : The line points.
+- `pt` : The point to be checked.
+- `epsilon` : An upper bound on the relative error due to rounding in floating point arithmetic. Default to 0.0001.
+
+## Examples
+
+    include <in_polyline.scad>;
+
+    pts = [
+        [0, 0],
+        [10, 0],
+        [10, 10]
+    ];
+
+    echo(in_polyline(pts, [-2, -3]));  // false
+    echo(in_polyline(pts, [5, 0]));    // true
+    echo(in_polyline(pts, [10, 5]));   // true
+    echo(in_polyline(pts, [10, 15]));  // false
+
+----
+
+    include <in_polyline.scad>;
+
+    pts = [
+        [10, 0, 10],
+        [20, 0, 10],
+        [20, 10, 10]
+    ]; 
+
+    echo(in_polyline(pts, [10, 0, 10]));  // true
+    echo(in_polyline(pts, [15, 0, 10]));  // true
+    echo(in_polyline(pts, [15, 1, 10]));  // false
+    echo(in_polyline(pts, [20, 11, 10])); // false    

docs/lib-in_polyline2d.md

@@ -1,26 +0,0 @@
-# in_polyline2d
-
-Checks wether a point is on a line.
-
-**Since:** 1.3
-
-## Parameters
-
-- `line_pts` : The line points.
-- `pt` : The point to be checked.
-- `epsilon` : An upper bound on the relative error due to rounding in floating point arithmetic. Default to 0.0001.
-
-## Examples
-
-    include <in_polyline2d.scad>;
-
-    pts = [
-        [0, 0],
-        [10, 0],
-        [10, 10]
-    ];
-
-    echo(in_polyline2d(pts, [-2, -3]));  // false
-    echo(in_polyline2d(pts, [5, 0]));    // true
-    echo(in_polyline2d(pts, [10, 5]));   // true
-    echo(in_polyline2d(pts, [10, 15]));  // false