Update readme

Author: fbrandao2k

RailExtraction/readme

@@ -1 +1,23 @@
+Rail detection - Original folder is https://github.com/Cyclone3DR/Scripts/tree/master/RailExtraction
+This script provides a functionality to extract rails from a point cloud in Cyclone3DR. To use it, open the script editor and load RailExtraction.js and run the script.
 
+Note:
+
+This script requires the trajectory of the scanner which acquired the point cloud (often generated by mobile mapping system)
+This script is implemented so that it extracts the rails on a first point cloud and then looks for another point cloud file with incremented name in order to continue the extraction
+The extraction will continue until no file is found next
+A version of the script (RailExtraction_CW.js) works directly on a CloudWorx Cloud: LGS or JetStream data imported in Cyclone3DR. In this version, load the CW cloud as well as the trajectory before running the script
+alt text
+
+Download Files
+You can download individual file using these links (for text file, right click on the link and choose "Save as..."):
+
+[00_utils.js] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/00_Util.js)
+[00_Variables.js] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/00_Variables.js)
+[01_Initialize.js] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/01_Initialize.js)
+[02_NextExtraction.js] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/02_NextExtraction.js)
+[RailExtraction.js] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/RailExtraction.js)
+[Track_01.laz] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/Track_01.laz)
+[Track_02.laz] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/Track_02.laz)
+[Trajectory.dxf] (https://raw.githubusercontent.com/Cyclone3DR/Scripts/master/RailExtraction/Trajectory.dxf)
+Or all scripts on this site can be download in a [single zip file] (https://github.com/Cyclone3DR/Scripts/archive/master.zip).