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docs/lib-in_line.scad

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+# in_line
+
+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_line.scad>;
+
+    pts = [
+        [0, 0],
+        [10, 0],
+        [10, 10]
+    ];
+
+    echo(in_line(pts, [-2, -3]));  // false
+    echo(in_line(pts, [5, 0]));    // true
+    echo(in_line(pts, [10, 5]));   // true
+    echo(in_line(pts, [10, 15]));  // false