Export Geometry::Object to Python

[Martyn Gigg]

This should allow, at minimum, access to the shapeXML & bounding box of a particular ObjComponent.

[Martyn Gigg]

Export Object class to Python

Also add shape() method to the IObjComponent interface export. Refs #9331

Changeset: 0ff794bfe715aadf173a1a877398de0b5039ff5a

[Martyn Gigg]

Export BoundingBox type to python

Refs #9331

Changeset: 8409af29ad7b9da948bd08a618bf4a1bc77aa639

[Martyn Gigg]

Branch: feature/9331_access_geometry_shape_from_python

Tester: This script demonstrates the use of the XML and bounding box to access the radius value of the instrument component's shape.

import mantid
import xml.etree.ElementTree as ET

w = mantid.simpleapi.Load("MAR11001.raw")
inst = w.getInstrument()
p = inst.getComponentByName("tall He3 element")
he3_shape = p.shape()

#------- By XML -------------
xml = he3_shape.getShapeXML()
# Define the namespace lookup in the XML
namespaces = {"ns1" : "http://www.mantidproject.org/IDF/1.0"}

root = ET.fromstring(xml)
cyl_elem = root.find("ns1:cylinder", namespaces=namespaces)
radius_elem = cyl_elem.find("ns1:radius", namespaces=namespaces)
radius = radius_elem.get("val", None)
print "Cylinder radius from XML:",radius

#------- By BoundingBox -------------
bounding_box = he3_shape.getBoundingBox()
widths = bounding_box.width()
# box is axis-aligned with shape and Y-axis is assumed "up"
radius = 0.5*widths.X()
print "Cylinder radius from bounding box:",radius

[Nick Draper]

Merge remote-tracking branch 'origin/feature/9331_access_geometry_shape_from_python'

Full changeset: ​983616e2d2d497bdb458e40d3b796d13159efbc7

[Stuart Campbell]

This ticket has been transferred to github issue ​10174