Esta Vd. en Aplicaciones>>Tangent line in a direction

 

USER MANUAL

 

Version 1.1.0

Tangent line, furthest or nearest to a line forming an angle with a given object

 

Linea tangente dirección

	Fecha Inicio: 25-01-2008 Catia V5 Release 16 Revisión: 28-06-2010

 

 

INDEX

1.       Target
2.       Where can I apply it?
3.       Buttons on the program
4.       Operation
4.1.       Example of application
5.       How to work and limitations
6.    Responsabilities
7.    Credits and Copyright

 

1.- Target

  The goal of this program is to create a line tangent to a curve through the furthest point (or closest) parallel to a line that forms a given angle to another.
   This functionality is not covered by Release19 SP2 CATIA V5.

The current program avoids the following steps:

• Having to draw a straight line with respect to given angle.
• Get the tangency point and if there is more than one, obtain the Extract of the desired point.
• At the obtained point, draw a tangent line, which would be parallel to the given angle.

 

2.- Where can I apply it?

 We must open a CATPart and activate a “Geometrical Set”
 If we do not activate a Geometrical Set, the program creates a G.S.
 To use it you must have an update license of the program.

 

3.- Buttons on the program.

  The program has the following buttons to the tasks that are explained below.

  All buttons (Curve and Line) are used by selecting the geometry first in the graphic area or in the tree, and then hit the corresponding button in the panel or vice versa.

• Curve Button: Used to determine the curve where the tangency will be done. This information is required.
• Line Button: Allows defining the proper reference to the parallel constructed. This information is also required.
• OK Button: is used to create the items once we have all the desired options.
• Exit button: is used to exit from the program (go to my “tepee”...)

 The language flags buttons change language in use and avoid repeating this operation.

• Help in Spanish: shows the document in pdf format of the Spanish help file and sets the texts and messages in Spanish.
• Help in English: shows the document in pdf format of the English help file and sets the texts and messages in English.

The Options:

• More remote : In case of closed curve or several points of tangency, allows us to define which points (the more distant or closer) we want. If the option is not selected, the closest point is chosen by default. Take note that it is considered a length of 3000mm for the furthest.

And the numeric fields:

• Initial Length: Set the length from the point of tangency to one side.
• Final length: Set the length from the point of tangency to the other side.
• Angle: We can define an angle with respect to the reference line.

 

4.- Operation.

 We must select a flat curve and a line using the buttons done for the purpose of selection.
  If the selected line is infinite, we can have problems with inserted body and with the parameter “Mas_lejana = true” or “Mas_lejana = false”, giving both of them the same result.
  Fill in the fields as desired and click the  OK  button.
  If you have not created any “Geometrical Set” the program will create one called “Lin_Tang”. So if you have created a number of G. S. in the active Part, there would be none “in work object”.

4.1.- Example of application.

  Let's see how this program is working. Suppose we have a flat curve and a line and we turned on “Geometrical Set” “Resultados”

1. We double click the program LinTgtAng.exe and a window appears like in the first figure.
2. Select the curve on the tree or on the 3D and then click on the Curve button.
   
   
     We can see that the name of the curve appears at the right side of the button and a message indicates that the curve has been selected. We can change the curve to repeat this step.
    If the selected curve is the edge of a surface or solid (topological element), the program creates a feature such as “Extract” of that element.
     We may at any time change the curve back to repeat this step.
   
3. We select a line in the specification tree or in the graphic area and click the Line button (or click the Line button and then the line).
    If the selected curve is the edge of a surface or solid (topological element), the program creates a feature such as “Extract” of that element.

 The message tells us if the selection, at least for the time is correct.

4. Fill the numeric fields and the options as follows:

• If the tangent makes an angle with respect to the reference line, type the angle in the corresponding field.
• If the tangent is the furthest (if several choices), activate the check “More Remote”.
• If you want other values for the “Initial Length” and “Final Length” of the line proper.

5. Hit  OK  to show us the line. Takes a few seconds to update the tree. Patience....

  With the same elements selected (curve and line of reference), we can vary the different parameters (angle, length, proximity) and click  OK   to get another tangent.

6. You can select other geometric elements, without having to leave the program and hit again OK.
7. Click on the  Exit  button and let the program start again. Click on the button  Exit   and let the program upload again.

  The elements created, of course, can edit and change its parameters.
  To edit the elements do the following:

• Select the feature and simple double click or, from the context menu in the last line we have the “name_of_Feature Object Definition ..” and we leave this menu:

• In this menu you can click on the “Value” and you can change it to another by simply clicking on this. In this case, will supports elements “topological” as edges of surfaces that do not exist in the tree.
• Parameters can be changed in another tab or directly from the specification tree by double clicking on them.

5.- How to work and limitations.

  This program is based on a UDF (User Defined Feature) that creates few points with the “PointTangent on Curve”. And we must remember that this function can take several points, whether the curve is closed or if the curve has undulations. In these cases we can only select the “nearest” or “the furthest” and not the intermediary, if any.
  To take the direction of the line selected, the program project first this on the plane containing the curve. But if the line is perpendicular to the UDF fails, of course.
  Also fail if the chosen angle or the direction of the line can not provide any tangency with the curve.

  This option of “More remote” is on the followin:

• If the curve is to the right of the direction of the line Reference “Mas lejana” = false, actually gives us the furthest result.

• If the curve is to the left of the “direction of the line Reference” the “Mas_lejana” = false, it gives us really the closest result.

  Then the value of “More remote” (Mas_lejana) is a “relative” to an object.

  In some cases, the program cannot accept a curve to be part of a “topological component” (not represented in the tree, as edges of a surface). If click to OK button we might get this message: “There is no solution for this operation!!. Please note: edit UDF manually and verify data”.

And if we edit we can change the straight edge on the other with NO infinite length.

6.- Responsabilities.

  This software is provided “as is” without warranty of any kind, express or implied.
  In any case, the author or any of the copyright holders cannot be held liable for any claim for damages, loss of data, damage to hardware or media damage.
  You have in mind that if you decide to use this program, does so at your own risk .

7.- Credits and Copyright.

  The program is subject to the rights described in Creative Common, as specified in About .. (By double clicking the icon in the upper right corner).

The program is an original idea of “El Juanri” from http://www.muchocatia.es/.

I want to thank the interest shown by Mr. Salud (from China)
   To download the program and documentation send to e-mail : Juanri .

Dirija sus preguntas a: juanri@muchocatia.es

CATIA V5 R16