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Last modified by Soeren Domroes on 2024/05/24 07:41
From version 11.1
edited by Richard Kreissig
on 2023/09/07 11:19
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To version 6.1
edited by Soeren Domroes
on 2022/09/26 07:20
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1 -Theses.Topics for Student Theses.WebHome
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4 +The Sugiyama algorithm consists of 5 phases: cycle breaking, layer assignment, crossing minimization, node placement and edge routing. Node placement sets the x-coordinates of nodes (in a downward layout) and creates alignment between nodes, improves edge straightness, or balances nodes based on their incoming edges. Node sizes can also be used to eliminate edge bends by increasing the size of nodes, as seen below, which makes the drawing easier to read, edges easier to follow and therefore easier to understand.
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2 -The classic Sugiyama graph drawing algorithm consists of 5 phases: cycle breaking, layer assignment, crossing minimization, node placement and edge routing. Node placement sets the x-coordinates of nodes (in a downward layout) and creates alignment between nodes, improves edge straightness, or balances nodes based on their incoming edges. Node sizes can also be used to eliminate edge bends by increasing the size of nodes, as seen below, which makes the drawing easier to read, edges easier to follow and therefore easier to understand.
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4 4  [[image:attach:jette-stpa-oyes-bad.png]]
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6 6  [[image:attach:jette-stpa-oyes.png]]
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8 8  Figure showing the current layout without flexible node size and the existing ONO (obviously not optimal) parts of a layout with flexible node size
9 9  
10 10  = Goals =
11 11  
12 -* Improve the existing Network Simplex node placement strategy with flexible node size by:\\
13 -** centering edges on their nodes if it does not compromise the quality of the layout, if necessary by increasing node sizes even more
24 +* Improve the existing node size flexible network simplex node placement strategy by:\\
25 +** centering edges on their nodes if it does not compromise the quality of the layout (if necessary by increasing node sizes even more)
14 14  ** minimize the size of the drawing if possible
15 15  * (optional) Explore options that need configuration depending on the context.
16 16  ** alignment of edges, ...
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17 17  
18 18  = Scope =
19 19  
20 -Master's (Bachelor's) Thesis
32 +Bachelor Thesis
21 21  
22 22  = Related Work/Literature =
23 23  
24 -Emden R. Gansner, Eleftherios Koutsofios, Stephen C. North, Kiem-Phong Vo, //A technique for drawing directed graphs//. Software Engineering 19(3), pp. 214-230, 1993.
36 +Emden R. Gansner, Eleftherios Koutsofios, Stephen C. North, Kiem-Phong Vo, A technique for drawing directed graphs. Software Engineering 19(3), pp. 214-230, 1993.
25 25  
26 -Ulf Rüegg, //Sugiyama Layouts for Prescribed Drawing Areas //([[KCSS>>url:https://www.uni-kiel.de/journals/receive/jportal_jparticle_00000341||shape="rect" class="internal-link"]] 2018/1), Chapter 4.1: Network Simplex Approach
38 +Ulf Rüegg, //Sugiyama Layouts for Prescribed Drawing Areas//, Disputation: 26 June 2018 ([[KCSS>>url:https://www.uni-kiel.de/journals/receive/jportal_jparticle_00000341||shape="rect" class="internal-link"]] 2018/1) (in Chapter 4.1 Network Simplex Approach)
27 27  
28 -= Involved Languages/Technologies =
40 +[[https:~~/~~/github.com/eclipse/elk/issues/853>>url:https://github.com/eclipse/elk/issues/853||shape="rect"]] (corresponding ticket in [[ELK>>url:https://www.eclipse.org/elk/||shape="rect"]])
29 29  
30 -* Java
31 -* ELK
32 -** [[https:~~/~~/github.com/eclipse/elk/issues/853>>url:https://github.com/eclipse/elk/issues/853||shape="rect"]] (corresponding ticket in [[ELK>>url:https://www.eclipse.org/elk/||shape="rect"]])
33 -
34 34  = Supervised By =
35 35  
36 36  Sören Domrös
37 -
38 -sdo@ifi
39 -
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1 -https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/RTSYS/pages/136183893/Node Placement with Flexible Node Size and Port Position
1 +https://rtsys.informatik.uni-kiel.de/confluence//wiki/spaces/RTSYS/pages/136183937/Node Placement with Flexible Node Size and Port Position