Add v.in.lidar algorithm

python/plugins/processing/algs/grass7/description/v.in.lidar.txt

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+v.in.lidar
+Converts LAS LiDAR point clouds to a GRASS vector map with libLAS.
+Vector (v.*)
+ParameterFile|input|LiDAR input files in LAS format (*.las or *.laz)|False|False
+ParameterExtent|spatial|Import subregion only|None|True
+ParameterString|return_filter|Only import points of selected return type (Options: first, last, mid)|None|False|True
+ParameterString|class_filter|Only import points of selected class(es) (comma separated integers)|None|False|True
+*ParameterBoolean|-t|Do not create attribute table|False
+Hardcoded|-o
+OutputVector|output|Lidar

python/plugins/processing/algs/grass7/ext/v_in_lidar.py

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+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    v_in_lidar.py
+    -------------
+    Date                 : March 2016
+    Copyright            : (C) 2016 by Médéric Ribreux
+    Email                : medspx at medspx dot fr
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Médéric Ribreux'
+__date__ = 'March 2016'
+__copyright__ = '(C) 2016, Médéric Ribreux'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+def processCommand(alg):
+    # Handle the extent
+    extent = alg.getParameterFromName('spatial')
+    oldExtent = extent.value
+    if extent.value:
+        l = extent.value.split(',')
+        extent.value = ','.join([l[0], l[2], l[1], l[3]])
+
+    alg.processCommand()
+    if extent.value:
+        extent.value = oldExtent