annotate OrthancStone/Resources/Computations/IntersectSegmentAndHorizontalLine.py @ 1595:621e4e11783d

doxygen target, more consistent ORTHANC_STONE_ROOT
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 26 Oct 2020 17:42:13 +0100
parents 8c5f9864545f
children 8563ea5d8ae4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
132
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
1 #!/usr/bin/env python
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
2
1589
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
3 # Stone of Orthanc
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
4 # Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
5 # Department, University Hospital of Liege, Belgium
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
6 # Copyright (C) 2017-2020 Osimis S.A., Belgium
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
7 #
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
8 # This program is free software: you can redistribute it and/or
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
9 # modify it under the terms of the GNU Affero General Public License
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
10 # as published by the Free Software Foundation, either version 3 of
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
11 # the License, or (at your option) any later version.
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
12 #
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
13 # This program is distributed in the hope that it will be useful, but
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
14 # WITHOUT ANY WARRANTY; without even the implied warranty of
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
16 # Affero General Public License for more details.
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
17 #
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
18 # You should have received a copy of the GNU Affero General Public License
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
19 # along with this program. If not, see <http://www.gnu.org/licenses/>.
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
20
8c5f9864545f adding missing headers
Sebastien Jodogne <s.jodogne@gmail.com>
parents: 1512
diff changeset
21
132
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
22 from sympy import *
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
23
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
24 # Intersection between the 2D line segment (prevX,prevY)-(curX,curY) and the
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
25 # horizontal line "y = y0" using homogeneous coordinates
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
26
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
27 prevX, prevY, curX, curY, y0 = symbols('prevX prevY curX curY y0')
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
28
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
29 p1 = Matrix([prevX, prevY, 1])
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
30 p2 = Matrix([curX, curY, 1])
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
31 l1 = p1.cross(p2)
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
32
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
33 h1 = Matrix([0, y0, 1])
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
34 h2 = Matrix([1, y0, 1])
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
35 l2 = h1.cross(h2)
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
36
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
37 a = l1.cross(l2)
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
38
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
39 #pprint(cse(a/a[2], symbols = symbols('a b')))
35c2b85836ce fix rtstruct projections
Sebastien Jodogne <s.jodogne@gmail.com>
parents:
diff changeset
40 pprint(a / a[2])