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based on an earlier version of the Wolfram Language.
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LineScaledCoordinate


gives the coordinate of a point in the polyline , at a scaled distance of r from point .

is the same as .
  • works for both 2 and 3 dimensions.
This displays the vertices that form the edges at a point 60% of the way down the arrow:
This adds edge labels in GraphPlot3D:
Needs["GraphUtilities`"]
This displays the vertices that form the edges at a point 60% of the way down the arrow:
In[2]:=
Click for copyable input
Out[2]=
This adds edge labels in GraphPlot3D:
In[3]:=
Click for copyable input
Out[3]=