[Gmsh] animate structural mode shapes

[Al Danial]

I'm trying to figure out how to animate modes of vibration of a structure
with gmsh's postprocessing tools.  Plugin(DisplacementRaise)
appears to be closest to what I should be using.  Since there's no demo 
or tutorial that uses this plugin it is slow going trying to get something
to work.  Here's my attempt:

I'm modeling a beam pinned at both ends.  Its first mode of vibration
looks like half of a sine wave--imagine a vibrating guitar string.  I model 
the beam as ten line elements on x=0 to x=1 and define displacements 
for the first mode, then try to use Plugin(DisplacementRaise) to deform 
the original mesh into the first mode shape:

View "ten_segment_bar" {
SL(0.0,0.0,0.0,0.1,0.0,0.0){1,1};
SL(0.1,0.0,0.0,0.2,0.0,0.0){1,1};
SL(0.2,0.0,0.0,0.3,0.0,0.0){1,1};
SL(0.3,0.0,0.0,0.4,0.0,0.0){1,1};
SL(0.4,0.0,0.0,0.5,0.0,0.0){1,1};
SL(0.5,0.0,0.0,0.6,0.0,0.0){1,1};
SL(0.6,0.0,0.0,0.7,0.0,0.0){1,1};
SL(0.7,0.0,0.0,0.8,0.0,0.0){1,1};
SL(0.8,0.0,0.0,0.9,0.0,0.0){1,1};
SL(0.9,0.0,0.0,1.0,0.0,0.0){1,1};
};

View "mode_1_displacements" {
VP(0.0,0.00,0.0){1};
VP(0.0,0.31,0.0){1};
VP(0.0,0.59,0.0){1};
VP(0.0,0.81,0.0){1};
VP(0.0,0.95,0.0){1};
VP(0.0,0.99,0.0){1};
VP(0.0,0.95,0.0){1};
VP(0.0,0.81,0.0){1};
VP(0.0,0.59,0.0){1};
VP(0.0,0.31,0.0){1};
};

Plugin(DisplacementRaise).iView = 0;
Plugin(DisplacementRaise).dView = 1;

Instead of a deformed structure I see the actual vectors in the
view I'm trying to use as displacements, anyone know how I ought
to define displacements or use this plugin?

Once this works is there an easy way to step through a scaled
series of shapes that go from the undeformed to the deformed
shape (say in eight or ten steps)?  Is there a built-in method to do
this that I've completely overlooked?              -- Al