Add polyline example

Author: tmontaigu

docs/examples.rst

@@ -27,6 +27,11 @@ Scalar Field
 .. literalinclude:: ../script_examples/scalar_field.py
     :language: Python
 
+Polyline
+---------
+
+.. literalinclude:: ../script_examples/polyline.py
+    :language: Python
 
 Sub sampling
 ------------

script_examples/polyline.py

@@ -0,0 +1,25 @@
+import pycc
+import cccorelib
+import numpy as np
+
+CC = pycc.GetInstance()
+VERTICES = np.array([
+    [-0.5, -0.5, 0],
+    [1, 1, 0],
+[2, 2, 0]
+])
+vertices = pycc.ccPointCloud(VERTICES[:, 0], VERTICES[:, 1], VERTICES[:, 2])
+polyline = pycc.ccPolyline(vertices)
+polyline.setColor(pycc.Rgb(255, 0, 0)) # set the color to red
+polyline.showColors(True)
+polyline.setClosed(False)
+
+
+# This is important, otherwise the polyline would have a size of 0
+polyline.addPointIndex(0, 3)
+
+
+CC.addToDB(polyline)
+CC.updateUI()
+polyline.getDisplay().display3DLabel("Hello, world", cccorelib.CCVector3(1, 1,0))
+