Include v.to.3d in QGIS-GRASS in three different modules: v.to.3d.fixed (fixed height for 3D vector features), v.to.3d.attr (attribute column used for height) and v.to.2d (reverse transformation)

Author: PedroVenancio

src/plugins/grass/modules/default.qgc

@@ -344,6 +344,9 @@
             </section>
             <section label="Convert 2D vector to 3D by sampling raster">
                 <grass name="v.drape"/>
+                <grass name="v.to.2d" version_min="6.4"/>
+                <grass name="v.to.3d.fixed" version_min="6.4"/>
+                <grass name="v.to.3d.attr" version_min="6.4"/>
                 <grass name="v.extrude.fixed"/>
                 <grass name="v.extrude.attr"/>
             </section>

src/plugins/grass/modules/v.to.2d.1.png

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE qgisgrassmodule SYSTEM "http://mrcc.com/qgisgrassmodule.dtd">
+
+<qgisgrassmodule label="Performs transformation of 3D vector features to 2D" module="v.to.3d">
+    <option key="input" typeoption="type" typemask="point,line"/>
+	<option key="output"/>
+    <field key="column" layer="input" type="integer,double" label="Column to store height values" advanced="yes"/>
+    <option key="layer" advanced="yes"/>
+    <flag key="r" answer="on" hidden="yes"/>
+</qgisgrassmodule>

src/plugins/grass/modules/v.to.2d.2.png

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE qgisgrassmodule SYSTEM "http://mrcc.com/qgisgrassmodule.dtd">
+
+<qgisgrassmodule label="Performs transformation of 2D vector features to 3D with height based on attribute" module="v.to.3d">
+    <option key="input"/>
+	<option key="output"/>
+    <field key="column" layer="input" type="integer,double" label="Column with height values"/>
+    <option key="layer" advanced="yes"/>
+</qgisgrassmodule>

src/plugins/grass/modules/v.to.2d.qgm

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE qgisgrassmodule SYSTEM "http://mrcc.com/qgisgrassmodule.dtd">
+
+<qgisgrassmodule label="Performs transformation of 2D vector features to 3D with fixed height" module="v.to.3d">
+    <option key="input"/>
+	<option key="output"/>
+    <option key="height"/>
+    <option key="layer" advanced="yes"/>
+</qgisgrassmodule>