Mercurial > hg > orthanc-stone
annotate OrthancStone/Resources/Computations/IntersectSegmentAndVerticalLine.py @ 1852:5ead1852095a StoneWebViewer-2.1
StoneWebViewer-2.1
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 29 Jun 2021 16:26:47 +0200 |
parents | 9ac2a65d4172 |
children | 3889ae96d2e9 |
rev | line source |
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1 #!/usr/bin/env python |
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2 |
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3 # Stone of Orthanc |
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4 # Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics |
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5 # Department, University Hospital of Liege, Belgium |
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6 # Copyright (C) 2017-2021 Osimis S.A., Belgium |
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7 # |
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8 # This program is free software: you can redistribute it and/or |
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9 # modify it under the terms of the GNU Lesser General Public License |
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10 # as published by the Free Software Foundation, either version 3 of |
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11 # the License, or (at your option) any later version. |
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12 # |
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13 # This program is distributed in the hope that it will be useful, but |
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14 # WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 # Lesser General Public License for more details. |
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17 # |
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18 # You should have received a copy of the GNU Lesser General Public |
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19 # License along with this program. If not, see |
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20 # <http://www.gnu.org/licenses/>. |
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21 |
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22 |
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23 from sympy import * |
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24 |
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25 # Intersection between the 2D line segment (prevX,prevY)-(curX,curY) and the |
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26 # vertical line "x = x0" using homogeneous coordinates |
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27 |
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28 prevX, prevY, curX, curY, x0 = symbols('prevX prevY curX curY x0') |
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29 |
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30 p1 = Matrix([prevX, prevY, 1]) |
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31 p2 = Matrix([curX, curY, 1]) |
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32 l1 = p1.cross(p2) |
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33 |
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34 h1 = Matrix([x0, 0, 1]) |
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35 h2 = Matrix([x0, 1, 1]) |
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36 l2 = h1.cross(h2) |
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37 |
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38 a = l1.cross(l2) |
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39 |
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40 pprint(a / a[2]) |