node38.html

htmdoc for html coding

<P>
 </DL>
<P>
The secondary menu of the sub-menu &quot;TOURNER AUTOUR...&quot; is the following:
<UL><LI> <b>&gt;&gt;</b> EXECUTION: <i> action</i> - X - Plot, taking the defined actions into account.
<LI> ANGLE DE ROT HORIZON: <i> status</i> - AH - To redefine the rotational angle around the Z axis
    (in degrees).
<LI> ANGLE DE ROT VERTICA: <i> status</i> - AV - To redefine the rotational angle in elevation
    (in degrees).
<LI> RAPPEL DES ANGLES: <i> status</i> - RAP - To display the angles in window F4.
<LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - To return to sub-menu &quot;MODIFIER LA VISU&quot;. The activated items in this menu
   remain active.
</UL>
<P>
<DT>Sub-menu &quot;COUPER:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via the sub-menu &quot;MODIFIER LA VISU&quot; of the main menu.
<P>
 </DL>
<P>
The user can define:
<UL><LI> an <b> opaque</b> cut: the part of the object situated behind the cut plane is displayed and
the intersection of the cut plane with the elements is plotted.
<LI> a <b> transparente</b> cut: the part of the object situated behind the cut plane is displayed and
the intersection of the cut plane with the elements is not plotted.
<LI> a section: only the intersection of the cut plane with the elements is plotted.
</UL>
<P>
The cut plane is defined with the aid of three points (click on the screen or enter their coordinates) or
via its equation. The equation of the cut plane will appear in window
 F4. Otherwise, the points can be entered by mixing the two capturing methods possible in this case.
<P>
<P>
<P>
This sub-menu is used to select the following items:
<P>
<UL><LI> COUPE OPAQUE: <i> status</i> - CPO - To define an opaque cut.
<LI> COUPE TRANSPARENTE: <i> status</i> - CPT - To define a transparent cut.
<LI> SECTION: <i> status</i> - SEC - To indicate that a section of the object is desired.
<LI> PAS DE COUPE: <i> status</i> - NCP - Remove the cut option.
<LI> POINT ECRAN: <i> action</i> - PE - To define a point on the screen by clicking on it.
<LI> NOEUD LE PLUS PROCHE: <i> action</i> - NP - To designate the point
in the object closest to the point clicked on the screen.
<LI> 3 COORDONNEES: <i> action</i> - 3C - To define a point by entering its three
 coordinates.
<LI> EQUATION LITTERALE: <i> action</i> - EQ - To define the cut plane via its equation. Enter the
 coefficients <b>A, B, C</b> and <b>D</b> of the plane defined by <b>AX+BY+CZ+D = 0</b>.
</UL>
<P>
The secondary menu of the sub-menu &quot;COUPER...&quot; is the following:
<UL><LI> ANNULE TOUT: <i> action</i> - ANNT - To delete the set of points introduced previously.
<LI> ANNULE DERNIER POINT: <i> action</i> - ANN - To delete the last point defined.
<LI> <b>&gt;&gt;</b> EXECUTION: <i> action</i> - X - To calculate the cut plane and display the plot.
<LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - To return to the sub-menu &quot;MODIFIER LA VISU&quot; with the present state.
</UL>
<P>
<P><A NAME=1761>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img69.gif">
<BR><STRONG>Figure 2.17:</STRONG> <i> Example <b> REFEXX</b>: opaque cut</i><A NAME=1758iExample1754bREFEXXb1754opaquecuti1758>&#160;</A><BR>
<P>
<P>
<DT>Sub-menu &quot;REFERENCES TRACEES&quot;:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via the sub-menu &quot;MODIFIER LA VISU&quot; of the main menu.
<P>
 </DL>
<P>
In this sub-menu, the user selects those items to plot for which he/she enters the reference number
(in the case of faces) and/or the sub-domain number (in the case of elements).
It enables us to select the following items:
<P>
<UL><LI> TOUTES REFERENCES: <i> status</i> - TRF - All faces are selected (default option).
<LI> FACES REFERENCEES: <i> status</i> - FRF - Only the faces with non-zero references are selected.
<LI> FACES SANS REFERENCE: <i> status</i> - FNRF - Only the faces with zero reference are selected.
<LI> REFERENCES DONNEES: <i> action</i> - DRF - To define the reference numbers of the faces to be selected.
The user enters the total (maximum 10) of these numbers followed by the set of numbers.
<LI> TOUS LES SD: <i> status</i> - TSD - All the elements are selected (default option).
<LI> SD DONNES: <i> action</i> - DSD - To define the sub-domain numbers of the elements to select. The user
enters the total (maximum 5) of these numbers followed be the set of numbers.
</UL>
<P>
The secondary menu of sub-menu &quot;REFERENCES TRACEES...&quot; is given below:
<UL><LI> <b>&gt;&gt;</b> EXECUTION: <i> action</i> - X - Plot the object with the items as specified above.
<LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - Return to sub-menu &quot;MODIFIER LA VISU&quot;.
</UL>
<P>
<DT>Sub-menu &quot;ITEMS TRACES&quot;:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via sub-menu &quot;MODIFIER LA VISU&quot; of the main menu.
<P>
 </DL>
<P>
This sub-menu is used to define the plot type and to specify the visibility notions. It enables us to select
the following items:
<P>
<UL><LI> PEAU VISIBLE: <i> status</i> - VIS - Only the visible faces (default option) are selected.
<LI> SHRINK COTE VISIBLE: <i> status</i> - SHR - The visible faces are shrunken around their barycentre.
<LI> PEAU NON VISIBLE: <i> status</i> - NVIS - Only the non-visible faces are selected.
<LI> SHRINK COTE INVISIBL: <i> status</i> - NSHR - The non-visible are shrunken.
<LI> ARETES DE LA PEAU: <i> status</i> - ARE - The edges of the outer surface are selected and plotted
using solid line mode.
<LI> TOUTES LES ARETES: <i> status</i> - TAR - All the edges are selected.
<LI> NUAGE DE POINTS: <i> status</i> - NUAG - The outer surface is plotted in solid line mode and all the
mesh points shown.
<LI> SHRINK TOUS COTES: <i> status</i> - SHRT - The surface faces are plotted in solid line mode.
<LI> SHRINK DE TOUT: <i> status</i> - TSHR - All the faces (surface and internal) are shrunken and
plotted in solid line mode (plot not readable well).
<LI> ARETES SUSPECTES: <i> status</i> - SUS - The suspect edges appear in bold. A boundary edge
is called suspect if it does not belong exactly to two boundary faces (this
can nevertheless be the case of correct edges belonging two &quot;internal boundaries&quot;).
<LI> ARETES COPLANAIRES: <i> status</i> - COP - If this item is active, the coplanar edges are plotted.
<LI> REMPLISSAGE FACES: <i> status</i> - REMP - If this item is active, the faces are colored-in, if not
they are the same color as the background.
<LI> PAS D'ORIENTATION: <i> status</i> - ORI - A correct and purely volumetric object
has oriented faces. An object composed of triangles or quadrilaterals is not oriented. This option
is used to avoid the bold lines indicating suspect zones in the plot.
</UL>
<P>
The secondary menu of sub-menu &quot;ITEMS TRACES...&quot; is given below:
<UL><LI> <b>&gt;&gt;</b> EXECUTION: <i> action</i> - X - Plot the object retaining the above selections.
<LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - Return to sub-menu &quot;MODIFIER LA VISU&quot;.
</UL>
<P>
<P><A NAME=1774>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img69.gif">
<BR><STRONG>Figure 2.18:</STRONG> <i> Example <b> REFEXX</b>: solid line and elimination</i><A NAME=1771iExample1767bREFEXXb1767solidlineandeliminationi1771>&#160;</A><BR>
<P>
<P>
<DT>Sub-menu &quot;NUMERO&quot;:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via the sub-menu &quot;MODIFIER LA VISU&quot; of the main menu.
<P>
 </DL>
<P>
This sub-menu is used to display the number on the plot. The numbers may be item numbers (elements, points),
or reference or sub-domain numbers.
It enables us to select the following items:
<P>
<UL><LI> ELEMENTS: <i> status</i> - NGEL - To plot the element numbers (option active or not depending on the
plot option).
<LI> NOEUDS: <i> status</i> - NGNO - To plot the mesh point numbers (option active or not depending on the
plot option).
<LI> SOUS-DOMAINES: <i> status</i> - NRSD - To plot the element sub-domain numbers (option active or not depending on the
plot option).
<LI> TOUT: <i> status</i> - NRTT - To plot the point, edge and face reference numbers (option active or not depending on the
plot option).
<LI> NOEUDS: <i> status</i> - NRNO - To plot the point reference numbers (option active or not depending on the
plot option).
<LI> ARETES: <i> status</i> - NRAR - To plot the edge reference numbers (option active or not depending on the
plot option).
<LI> FACES: <i> status</i> - NRFA - To plot the face reference numbers (option active or not depending on the
plot option).
<LI> TOUTES REFERENCES: <i> status</i> - NRAL - To plot all the reference numbers (option active or not depending on the
plot option).
<LI> REFERENCE DONNEE: <i> status</i> - NRDO - To plot the reference numbers with a given value (option active or not depending on the
plot option). The user enters the number to be considered.
</UL>
<P>
The secondary menu of sub-menu &quot;ITEMS TRACES...&quot; is given below:
<UL><LI> RAPPEL DU NUMERO: <i> action</i> - RN - Print the number selected in F4.
<LI> CHANGER DE NUMERO: <i> action</i> - N - To change the number to be taken into account.
<LI> <b>&gt;&gt;</b> EXECUTION: <i> action</i> - X - Plot the object retaining the above selections.
<LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - Return to sub-menu &quot;MODIFIER LA VISU&quot;.
</UL>
<P>
<P><A NAME=1787>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img69.gif">
<BR><STRONG>Figure 2.19:</STRONG> <i> Example <b> REFEXX</b>: node numbers</i><A NAME=1784iExample1780bREFEXXb1780nodenumbersi1784>&#160;</A><BR>
<P>
<P>
<DT>Sub-menu &quot;INFO SUR OBJE&quot;:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via the main menu.
<P>
 </DL>
<P>
This sub-menu is used to obtain information pertaining to the mesh under consideration. It enables the user to
select the following items:
<P>
<UL><LI> REFERENCE POINT...: <i> sub-menu</i> - INFP - Go to sub-menu to enquire about a point
 (which will be designated).
<LI> REFERENCE ARETE: <i> action</i> - INFA - Click on a (boundary) edge to obtain its number
in D.S. <b> GEOM</b> and its reference number (in F4).
<LI> REFERENCE FACETTE: <i> action </i> - INFF - Click on a (boundary) face to obtain its
number in D.S. <b> GEOM</b> and its reference number (in F4). In the case of a cut,
we click on a point in the cut plane to obtain its coordinates and the sub-domain number
of the element to which it belongs.
<LI> INFO GENERALE: <i> action</i> - INFG - Print array NOP2 of the mesh data structure.
</UL>
<P>
The secondary menu of menu &quot;INFO SUR OBJE&quot; is given below:
<UL><LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - Return to the main menu.
</UL>
<P>
<DT>Sub-menu &quot;VERIF DU MAILLAGE&quot;:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via the main menu.
<P>
 </DL>
<P>
The module is used for certain mesh verifications. It can check that all elements have positive volumes.
<P>
It can also examine any element by animating it. To do this, we define a magnifying glass and designate an
element in the cut plane
 (it is thus necessary to define an <b> opaque cut</b>, or a
<b> section</b> beforehand). The element chosen is then visualized in the magnifying glass in
animated mode.
<P>
It can also be used to plot the quality isovalues for elements in the cut plane. The color blue indicates
good quality elements, whereas red is used for bad quality elements
(option valid only on color screens).
<P>
The quality of a tetrahedron is defined by:
<P>
 <DIV ALIGN=center><IMG BORDER=0 ALIGN=MIDDLE ALT="" SRC="img70.gif"></DIV>
<P>
where <IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img2.gif"> is a normalization factor, <b>h</b> is the element diameter and
<IMG BORDER=0 ALIGN=MIDDLE ALT="" SRC="img4.gif"> is the radius of the inscribed sphere. An element with quality close to 1 is very good, whereas
the more <b>Q</b> increases the more the element is degenerate.
<P>
The quality measurement is only valid for meshes composed of tetrahedra. For the others elements, it is necessary
to complete function CRIQUA.
<P>
<P>
<P>
The sub-menu is used to select the following items:
<P>
<UL><LI> ISO DE QUALITE: <i> status</i> - ISOQ - To plot the quality isovalues on a cut plane or a section.
<LI> DEFINIR LA LOUPE: <i> action</i> - DEFL - To define a magnifying glass, i.e. a small window in
the screen, by clicking on two points, in which the selected element is then be displayed.
Several magnifying glasses can be defined.
<LI> ELEMENT POINTE: <i> action</i> - LOUP - To define the element to plot in the last magnifying glass
defined beforehand. The element in the cut plane is selected by clicking on top of it.
All types of elements are possible. The quality (if it corresponds to a tetrahedron) and the volume of
the element are then displayed in the magnifying glass. The element pointer and its point coordinates
are shown in F4 whereas the element, displayed in solid line mode, appears on the object.
<LI> ELEMENT NUMERO: <i> action</i> - ELNO - The same as above by selecting the element
by its number.
<LI> POINT NUMERO: <i> action</i> - PONO - The same by selecting a point.
<LI> VOLUMES NEGATIFS: <i> action</i> - VONE - To search for all elements with negative volumes
(it corresponds to those who are behind the cut plane if there is one, or all if not). The list of elements
found will appear. The negatives will be pointed out (dotted).
<LI> ELEMENTS MAUVAIS: <i> action</i> - CRSU - To search , as above, for the elements for which
the quality exceeds a given value (which will be requested) (option valid for tetrahedra).
<LI> ANIMATION LENTE: <i> action</i> - ANL - The element displayed in the magnifying glass is animated by
slow rotations.
<LI> ANIMATION MOYENNE: <i> action</i> - ANM - The element displayed in the magnifying glass is animated by
medium speed rotations.
<LI> ANIMATION RAPIDE: <i> action</i> - ANR - The element displayed in the magnifying glass is animated by
 fast rotations.
</UL>
<P>
The secondary menu of menu &quot;VERIF DU MAILLAGE&quot; is given below:
<UL><LI> <b>&gt;&gt;</b> QUITTER: <i> action</i> - Q - Return to sub-menu &quot;MODIFIER LA VISU&quot;.
</UL>
<P>
<P><A NAME=1800>&#160;</A><IMG BORDER=0 ALIGN=BOTTOM ALT="" SRC="img69.gif">
<BR><STRONG>Figure 2.20:</STRONG> <i> Example <b> REFEXX</b>: magnification and animation</i><A NAME=1797iExample1793bREFEXXb1793magnificationandanimationi1797>&#160;</A><BR>
<P>
<P>
<DT>Sub-domain &quot;REFERENCE POINT&quot;:
<DD>  
<P>
<DL COMPACT><DT>Access:
<DD> Via the sub-menu &quot;INFO SUR OBJE&quot; of the main menu.
<P>
 </DL>
<P>
 This sub-menu is used to obtain information pertaining to a mesh point clicked on the
screen. The following items can be selected.
<P>
<UL><LI> NOEUD LE PLUS PROCHE: <i> action</i> - NPP - Return the coordinates, the number and the
reference number of the point which is closest to the point clicked on the screen (not
possible in the case of a cut).