POSTPROCESS OPTIONS |
Introduction |
This chapter describes some relevant aspects of the Postprocessing step and the way to load results from a numerical analysis into GiD.
In the GiD postprocess you can study the results obtained from a solver program. The GiD postprocess receives mesh and results information from the solver module. If the solver module doesn't create any new mesh, the preprocess mesh is used.
The communication between the solver and the GiD Postprocess is made using files.
The solver program has to write the results in a file that must have the extension .post.res
, or the old .flavia.res
, and its name must be the project name.
If the solver writes a mesh, the file must have the extension .post.msh
, or the old .flavia.msh
. ( see section POSTPROCESS DATA FILES )
The extensions .msh
and .res
are also allowed, but
only the files with the extensions .post.msh
, .post.res
and
the old ones .flavia.msh
and .flavia.res
will be automatically read by GiD when postprocessing the GiD project.
There are two ways to postprocess inside GiD:
ProjectName.gid
) you want to postprocess, and then
select the postprocess
option from the files
menu or click on the pre/post
toolbar button. This way
the ProjectName.flavia.res
, or the old ProjectName.flavia.res
, will automatically be read by GiD,
and the ProjectName.post.msh
, or the old ProjectName.flavia.msh
, if present.
postprocess
option from the files
menu or click on the pre/post
toolbar button. Now open the pair files OtherModel.msh
and OtherModel.res
.
Once inside the postprocessing section of GiD, all the visualization features and management options of the preprocess section are available: Zoom, Rotate (Rotate screen/object axes, Rotate trackball,etc.), Pan, Redraw, Render, Label, Clip Planes, Perspective, etc.
Note: There is no need to load a project into GiD to use its Postprocessing; you can open directly the mesh and results information directly from the GiD postprocess. ( see section Files menu )
Files menu |
Several useful options has been added inside the Files
menu:
All
is choosen, the user will be asked for a prefix
. Then, GiD will create
a file for each Graph with the names prefix
-1.cur, prefix
-2.cur,
prefix
-3.cur and so on . . .
The rest of the options are the same on the preprocess part.
Utilities |
Inside the Utilities
menu, the options Id
, Signal
, Distance
and Calculator
have the
same funcionality as in the Preprocess (see section UTILITIES). Other options of the Utilities
menu are slightly different:
Status
: a window appears showing the general postprocess status:
number of meshes, elements, etc.
List
Colapse
: to colapse nodes that are together in a set.
Join
: to join several sets into one.
Delete
: to delete meshes, sets and cuts.
Texture
: to add textures to sets see section Textures.
status window
list nodes window
list elements windows
The Copy utility introduces some changes:
When choosing the Copy utility the Transformations
window appears. This window allows the user to repeat the the visualization using translation, rotation and mirror transformations, so that GiD can draw a whole model when only a part of it was analyzed:
Transformations Window
Transformations types are:
Available options are:
Show/Hide
, Undo
and Clear
options are enabled.
Show/Hide
, Undo
and Clear
are disabled.
Button DoIt tells the program to do the transformation selected.
Point and Line options |
As points and lines can be viewed, there are several interesting options for each of them.
Point options window
Here the user can select whether to draw the points Quick
, Nice
or with the center of a Texture
glued to the point.
Quick
: points will be drawn as big dots.
Nice
: points will be drawn as little spheres (quadrilateral meshes).
For every draw style, the Point Size
can be changed, but ranges varies between Quick
, which depends on the graphics library, and Nice
and Texture
.
When the Nice
style is selected, the Nice detail
level can be adjusted. The number represents the number of vertical and horizontal subdivision of a sphere.
Note: The changes affect all the points representation: point elements and the arrow head of vectors when using the Point
detail level see section Display vectors.
Line options window
Here the user can select whether to draw the lines with a Quick
style or a Nice
one.
Selecting a Line Size
of 0.0 in the Nice
style, will cause the lines to be not drawn.
Quick
: lines are drawn as 3-point thick lines. The line size is fixed.
Nice
: lines are drawn as long 4-sided or 8-sided prismas. The size, width, of the lines can be changed.
When the lines are drawn nicely, the number of sides of the prisma
used to draw them can be changed between 4 and 8 sides.
Note: Line options no longer affect the stream lines as before, but only the line elements.
For stream lines otions see section Stream Lines.
Display Style |
There is a View Style
window, where almost all the interesing visualization
options can be adjusted which only deals with meshes, sets or cuts, and not with results.
Display Style Window
Selecting Volumes, Surfaces and/or Cuts, the user can switch them On
and Off
,
Del
ete them, after confirmation, or rename them.
Also, clicking on a Volume, Surface or Cut, and pressing
Color...
the user can change the colour look, or its Ambient
, Diffuse
, Specular
and Shininess
components, of the selected set, or give it its Default
color
back. The Diffuse
component is used for all the representation, while the rest
( Ambient
, Specular
and Shininess
) has more sense for Render
visualization.
Under the menu Style the user can choose how volumes, surfaces and cuts should be drawn. These options are:
Results Options BorderAngle
on the Right Buttons
menu.
Hidden Boundaries
drawn too.
Hidden Lines
drawn too.
With the Render menu the user can select how to see the mesh:
Normal
- no lighting
Flat
- lighting with sharpen edges
Smooth
- lighting with smoothed edges
Also the light direction can be changed with the lamp icon button.
Near the Culling
label, the user can choose wether the Front Faces
,
Back Faces
, Front and Back Faces
are culled, i. e. not drawn, or No Faces
are culled. This option is useful to llok into volume meshes, etc.
Conditions
can also be drawn if they are present in preprocess, not only geometry conditions
but also mesh conditions.
Following options can be changed for each mesh/set/cut separately:
The Massive
option allows the user to see the elements that are inside a volume mesh,
and to draw all the vectors inside of a volume/surface/cut when a Boundaries
display style
is used.
With the Transparent
option the volumes/surfaces/cuts will be drawn transparently or opaque,
so that, for instance, iso surfaces inside them can be viewed easily.
Textures |
In GiD it is also possible to assign a texture to a Set. Inside the menu Utilities->Texture there are several options:
Fast
mode just
draws the pixels using the 'nearest neighbor' policy, and the Nice
tries to interpolate the colours of the pixels from the original.
ScreenMap
: by picking four points over the screen, GiD
projects the texture, parallel to the screen, over the underlying sets.
4 sided
: tries to match the 4 sides of the texture to the
4 sides of the set. The best results are achieved using quadrilateral
sets which are more or less flat, at least in one direction.
BoundImg to BoundSet
: looks for the border of the texture inside
the image file and tries to glue it to the border of the set, for instance
a texture circle to a circle set.
Note: When the display style of the visualization is changed,
for instance from Body
to Body Boundaries
the visualization
of the texture is switched off. To view the texture, just select
Utilities->Texture->View->Fast/Nice.
Once the texture is applied to a Set, when the Set is deformed, the texture is deformed accordingly, so the deformed texture can be visualized.
Cover mesh |
Another feature in GiD is the calculation of the involving mesh of a set of points or nodes. To switch the visualization of this mesh on and off just select Options->Geometry->Covering mesh. After saying 'Yes' to the visualization of the covering mesh, the user will be asked for a number. This number is the distance between the covering mesh and the points.
This option is not only available for points, but also for every mesh/set present in GiD.
Note: This covering mesh is recalculated when the mesh is deformed. So in a particle movement system, the covering mesh will also move along with the particles.
This mesh can also be saved through Files->Export->Cover mesh.
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