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SCaVis manual

Drawing diagrams

Drawing shapes programmically

Using SCaVis canvases, one can draw lines, arrows, ovals, interactive labels. One can use the same canvas as for plotting data and functions.

For example, use the canvas HPlot. One can add objects using the method “add” and the call “update()” method to draw all objects at once:

Code example

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 1: from jhplot import *
 2: from jhplot.shapes  import *
 3:
 4: c1=HPlot("Canvas")
 5: c1.setGTitle("HShape package")
 6: c1.setLegend(0)
 7: c1.setRange(-4.0,4.0,0.0,20.0)
 8: c1.visible()
 9: arr=Arrow(0.85,0.5,0.85,0.7)
10: arr.setColor(Color.blue)
11: arr.setPosCoord("NDC")
12: c1.add(arr)
13: lab=HLabel("Interactive label",-2,10);
14: c1.add(lab)
15: c1.update()

Click here to see the output of this script

Click here to see the output of this script

Click here to see the output of this script

Shapes

Drawing interactive diagrams

Let us show how to draw interactive diagrams using the class HPlotJa. This class also can be used to show data, histograms and functions, but it is better suited for interactive diagram drawing.

We will show below how to draw Feynman diagrams:

Code example

  Download for this example is disabled for non-members
 1: from java.awt import *
 2: from jhplot import *
 3: from jhplot.jadraw import Diagram
 4:
 5: c1=HPlotJa("Canvas",1000,750,1,1,0)
 6: c1.setGTitle("Feynman Diagram objects", Color.blue)
 7: c1.visible()
 8: c1.showEditor(1)   # show diagram editor
 9: gl=Diagram.Box(0.05,0.1) # box
10: gl.setRelWH(0.05,0.05,"NDC")
11: c1.add(gl)
12: gl=Diagram.Blob(0.05,0.2) # blob
13: gl.setRelWH(0.01,0.01,"NDC")
14: c1.add(gl)
15: gl=Diagram.Vertex(0, 0.05,0.3) # a vertex
16: gl.setRelWH(0.01,0.01,"NDC")
17: c1.add(gl)
18: gl=Diagram.GLine(0.6,0.7)     # gluon line
19: gl.setRelWH(0.1,0.2,"NDC")
20: c1.add(gl)
21: c1.update()

click here if you want to know more

click here if you want to know more

click here if you want to know more

A complete description of how to use Java, Jython and SCaVis for scientific analysis is described in the book Scientific data analysis using Jython and Java published by Springer Verlag, London, 2010 (by S.V.Chekanov)

Sergei Chekanov 2010/03/07 16:37

man/visual/diagrams.txt · Last modified: 2013/05/31 16:11 (external edit)
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