Added SampleEditPoints.py

rhinopython/SampleEditPoints.py

@@ -0,0 +1,49 @@
+################################################################################
+# SampleEditPoints.py
+# Copyright (c) 2018 Robert McNeel & Associates.
+# See License.md in the root of this repository for details.
+################################################################################
+import Rhino
+import rhinoscriptsyntax as rs
+
+# Demonstrates how to get a curve's edit points
+def SampleEditPoints():
+
+    obj_id = rs.GetObject('Select curve', rs.filter.curve)
+    if not obj_id: return
+
+    crv = rs.coercecurve(obj_id)
+    if not crv: return
+
+    nc = crv.ToNurbsCurve()
+
+    # NurbsCurve.GrevilleParameters always returns all parameters, even for
+    # perodic curves. Otherwise, it would not be possible to determine
+    # which subset of the full list of Greville abcissae was returned.
+    t_list = nc.GrevilleParameters()
+
+    # Filter out what we don't want so it looks like what we'd see if
+    # we ran the EditPtOn command
+    if t_list:
+        t = 0
+        t_count = t_list.Count
+        if nc.IsPeriodic:
+            t_count -= nc.Order - 1
+            rc = 0
+            while True:
+                if rc < nc.Order - 1 and t_list[t] < nc.Knots[nc.Order-2]:
+                    rc += 1
+                    t += 1
+                    continue
+                break
+        elif nc.IsClosed:
+            t_count -= 1
+
+        for n in range(t, t + t_count):
+            rs.AddPoint(nc.PointAt(t_list[n]))
+
+# Check to see if this file is being executed as the "main" python
+# script instead of being used as a module by some other python script
+# This allows us to use the module which ever way we want.
+if __name__ == "__main__":
+    SampleEditPoints()