Frequently Asked Questions


The Vertices/Splines/Boundaries are not displayed when clicking on Replot
The Cells/Mesh are not displayed when clicking on Cell Plot.
How can I delete a vertex or several vertices ?
How can I change the view ?
How can I draw a circle ?
How can I undo ?
How can I get more information about a particular command ?



The Vertices/Splines/Boundaries are not displayed when clicking on Replot.

To display an object, first select it with the tool Select set. When an oject is created, it is not automatically added to the set.

For exemple after creating some Vertices, in Prostar main window, click on the button V-> (Select Vertex Set) and select All. Then click on the button Vertex in the Cell Plot Display Options. Finally click on Replot and on Zoom off.

To select/unselect Vertices, use he button V-> (Select Vertex Set)
To select/unselect Splines, use he button S-> (Select Spline Set)
To select/unselect Boundaries, use he button B-> (Select Boundary Set)

The options of the Select ... Set menu are:
    All: to select all the objects of this type
    None: to unselect all the objects of this type
    Invert: to select the unselected and unselect the selected objects of this type
    New >: to create a new selection based on Cursor Select, or based on a Zone, a Type...
    Add >: to add objects to the current selection
    Unselect >: to remove objects from the current selection
    Subset >: to select objects of the current selection

To display/hide Vertices, click on the button Vertex in the Cell Plot Display Options
To display/hide Splines, click on the button Spline in the Cell Plot Display Options
To display/hide Boundaries, click on the button Boundary in the Cell Plot Display Options

Click on Replot

Click on Zoom off to display the whole selection.


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The Cells/Mesh are not displayed when clicking on Cell Plot.

To display Cells or the Mesh, first select the active Cells with the tool C-> (Select Cells Set).

The options of the Select Cells Set menu are:
    All: to select all the Cells
    None: to unselect all the Cells
    Invert: to select the unselected and unselect the selected Cells
    New >: to create a new selection based on a Zone, a Type, a Vertex Set...
    Add >: to add Cells to the current selection
    Unselect >: to remove Cells from the current selection
    Subset >: to select Cells of the current selection

Click on Cell Plot

Click on Zoom off to display the whole selection.


To display/hide the mesh, use the button Turn mesh plotting on/off.

To display/hide the Edges of the selected Cells, use the button Turn edge plotting on/off. When using this option, the mesh disappears.

Change the type of display with the list-button Hidden Surface.

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How can I delete a vertex or several vertices?

To delete a vertex, use the tools in the Prostar main window
Click on Vertex Tools. Do not forget to replot all the vertices.
Click on Delete Vertex... and then click on the Vertex that you want to delete in the main Prostar Window. To delete several vertices, there are two methods :
- using the Vertex set :
Define a Vertex Set so that it includes all the vertices you want to delete. Therefore, click on V -> New -> Zone in the main Prostar Window, and select the Zone of vertices you want to delete.
Then in the vertex tool, click on Delete Vertex Set.
- using the Vertices list :
In the main Prostar window , click on lists -> Vertices.
Then click on Show all verts. Select the vertices that you want to delete and click on Delete Vertices.

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How can I change the view?

To change the view, use the tools in the Prostar main window
View tools

The mouse can be used to change the view:
    left-button: rotation
    middle-buuton: zoom
    right-button: translation

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How can I draw a circle?

To draw a circle with Prostar, first create several Vertices and link them with a Spline.

First, create 2 vertices at the tips of a diameter...
In the Prostar Ouput window In the STAR GUIde
Type
  v,1,0,300,0 Return
  v,2,0,0,0 Return
The parameters are:
the number of the points: 1/2
the 3 coordinates of the points in the active Coordinate System (cartesian): 0,300,0/0,0,0
In left part:
  -> Create and Import Geometry
  -> Create Geometric Entities
In right part:
  -> Select Items: Vertex
 Select the Vertices tab
  -> Select the Cartesian Coordinate System
  -> Select Create vertex
  -> Click on Vertices
  -> Type the 3 Coordinates 0,300,0
  -> Click on Done
  -> Type the 3 Coordinates 0,0,0
  -> Click on Done
...then create a local cylindrical coordinate system at the center of the circle,...
In the main Prostar window
Click on the orange button CSYS
Select an empty line (n4)
Select Cylindrical for the type of Coordinate System
Type the coordinates of the origin in the active system0 150 0
Click on New Local
To display this Coordinate System, click on Show Triad
Click on Set Active to use it
...and generate vertices on the circle...
In the Prostar Output window
To create the first half-circle, type
  vfill,1,2,20,3,1 Return
The parameters are:
 the number of the first Vertex: 1
 the number of the second Vertex: 2
 the total number of new Vertices: 20
 the number of the first new Vertex: 3
 the step for the new Vertices numbering: 1

This command creates points between two points with a regular linear variation of the coordinates. So in a Cartesian Coordinate System, all the points are aligned. Here, with the Local Cylindical Coordinate System defined above, the two points have the same distance to the axis and the same height. The sole variable coordinate is the angle and so the new points are on a half-circle.

Then change the direction of rotation
  csdir 180 Return
and create the clockwise half-circle
  vfill,1,2,20,23,1 Return
...Finally, link the vertices with Splines.


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How can I undo?

To cancel a mistake, use the command resuReturn in the Prostar Output window. This reload the last .mdl file. So regularly save your work.

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How can I get more informationabout a particular ?

To get more information about a particular command, click on help in the main prostar window. You can dicover the utility and the parameters of commands by filling in the Keyword cell. For instance, type patch in the cell. You will obtain information about the patch command.

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