Exercise 3 Create a Drawing Explicitly
8.3 User-Defined Views
Where the volume or limits of design items are unknown, User-Defined Views may be used to illustrate individual items or groups of items in the design model. The size of the bounding frame is independent of the View contents and the View scale can be automatically set to fit the design elements to the available View frame area.
A View is owned by a SHEE element. Before creation of a View, ensure that the correct SHEE is the Current Element.
Navigate to Sheet: SHEE DRWG-EQUIPMENT-AREA01/S1 and ensure it is the Working Sheet.
From the main menu select: Create > View > User-Defined… to display the Create VIEW form:
In this instance the default View name is acceptable. Select OK to accept the default name. The User-Defined View form will be displayed:
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8.3.1 User-Defined View Form: Frame Menu
The Frame menu accessed via the User-Defined View form enables the User you to switch the View Frame on or off, to control the size of the frame, its position on the Sheet and its alignment relative to any other View that may exist within the Sheet bounds.
The menu options are discussed in further detail below.
Size
This option has a sub-menu that allows the User to set the size of the view frame either by the Cursor or Explicitly.
Cursor: displays the Point Construction Option Form. This enables the opposing corners of the View Frame to be selected graphically.
Selecting the 2D Cursor Hit option from the option list allows the User to re-size the view window using a diagonal window.
Explicit: displays the Explicit Frame Size form. This resizes the frame by defining the size in terms of sheet co-ordinates or proportions.
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Copy Size
This option has a sub-menu that allows the User to copy the Width and/or Height of a second View via cursor selection.
Position
This option has a sub-menu that allows the User to position the frame by:
Cursor: enables the User to use the cursor to move the View Frame by nominating a point in the View. A further sub-menu allows the User to define how the cursor nominated point is positioned.
Explicit: displays the Explicit Frame Position form. This enables the User to position the View Frame by defining its Sheet position in terms of sheet co-ordinates or proportions.
Align
This option has a sub-menu that allows the User to align a specified axis or edge of the current View with the same axis or edge of an existing View on the Sheet via cursor selection.
Centre Vert: prompts the User to identify the central vertical alignment of a View to be used to align the current View.
Centre Horiz: prompts the User to identify the central horizontal alignment of a View to be used to align the current View.
Top: prompts the User to identify the top edge of a View to align the current View.
Bottom: prompts the User to identify the bottom edge of a View to be used to align the current View.
Left: prompts the User to identify the left edge of a View to be used to align the current View.
Right: prompts the User to identify the right edge a view whose right edge is to be used to align the current view. The position of the current view will then change to align the views right edges.
8.3.2 User-Defined View Form: View Menu
The View menu on the User-Defined View form enables the User to toggle the display of the view on or off, centre the View via Design co-ordinates and offset the Design element graphics with respect to the centre of the view.
The menu options are discussed in further detail below.
Centre
This option has a sub-menu which allows the designer to select the centre of interest of the view.
Identify: prompts the User to identify a design element to be the centre of interest of the View.
Cursor: displays the Point Construction Option Form and prompts the User to select a point with the cursor to become the centre of interest.
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By Cursor: displays the Point Construction Option Form and prompts the User to select a base point and displacement with the cursor to move the centre of interest of the View.
Explicit: displays the User Defined Centre Position form enabling the User to enter co-ordinates for the centre of the View.
Offset
Displays the Design Graphics Offset Form. The form enables the User to position the centre of the View contents relative to the view centre.
8.3.3 User-Defined View Form: Graphics Menu
The Graphics menu on the User-Defined View form enables the User to create and modify a Drawlist as well as setting the Drawlist Reference for the View.
A Drawlist holds a list of Design elements that determine what will be displayed in the View. The Drawlist is independent of the Views. A Sheet may contain several Views that refer to the same Drawlist, or several views that refer to different Drawlists.
Drawlists (IDLI elements) are stored in Drawlist Libraries (DLLB elements). When a Drawing is created, a Library containing a default Drawlist Library is automatically created and may be used as the Drawlist for any Views created on Sheets owned by that Drawing. Specific Drawlists for specific Views may also be created and stored in the default Drawlist Library, or in another Drawlist Library located elsewhere in the project subject to the set-up instigated by the Draft Administrator.
The menu options are discussed in further detail below.
Drawlist
Selecting Graphics > Drawlist will display the Drawlist Management form:
Drawlist Library: list displaying the available Drawlist Libraries.
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Drawlists: Scrollable list of all the Drawlists available within the selected Drawlist Library Create Creates a new empty drawlist
Create Copy Creates a copy of the selected drawlist Delete Deletes the current selected drawlist
Clean Up Removes any drawlist members with Null or Bad references Reference List Members: Displays Design Members of the current MDB.
: If Drawlists is selected from the scrollable list, the available Drawlists will be displayed.
The Lists... button allows lists to be selected where previously defined. If there are no Lists defined, or a list is required, clicking the button will display the List/Collection form.
Having defined a new List, clicking the Update button will display all defined Lists in the scrollable list for selection.
Drawlist Members window: displays the Design elements or Drawlists that have been selected to be members of the current Drawlist.
Items are added to the Drawlist by selecting them from the Reference Members List, or a List / Collection name from the scrollable list, and clicking the Add button. This creates an Add Element (ADDE) in the Drawlist Members window. Specific items may also be removed from the Drawlist by selecting them in the Reference Members List, or a List/Collection name from the scrollable list, and clicking the Remove button. This creates a Remove Element (REME) in the Drawlist Members window.
In the example above, all equipment except /E1301 is required to be displayed in the View. Rather than adding each piece of equipment separately, the zone /ZONE-EQUIPMENT-AREA01 may be added and the specific piece of equipment /E1301 subsequently removed from the Drawlist.
Delete Entry & Delete All: Delete the current highlighted entry from the Drawlist or all Drawlist members respectively.
Volume Defined: Enables the addition of all elements that are positioned wholly within a defined volume.
Limits: Clicking the button will display the Drawlist Limits form. The limits are set by entering appropriate co-ordinates for opposing corners of the limits box.
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Drawlist Ref
Selecting Graphics > Drawlist Ref… will display the Drawlist Reference form.
This form enables the User to reference the current View to a Drawlist thereby defining the Drawlist Members to be displayed in the view.
A view may only reference one Drawlist.The Options scrollable list allows the Drawlist of the owning Sheet, or the owning Drawing, to be used.
The Drawlist Library scrollable list allows the User to choose from a list of Drawlist Libraries, as set up by the Draft Administrator. The „Drawing‟ selection refers to the Drawlist Library created automatically when the views owning Drawing was created.
The Drawlist Contents window displays the contents of the selected Drawlist when the Display button is clicked. This allows the User to check the contents of the Drawlist selected.
The Modify button displays the Drawlist Management form enabling the user to modify or create a new Drawlist as described previously.
8.3.4 User-Defined View Form: General Tab
The General Tab of the User-Defined View form allows the User to define representation styles, View directions and the Title associated with each View.
The various option lists and functions are described below.
Title
This field allows the User to enter a Title for the view being created e.g. Plan North, or Western Elevation.
To limit the amount of free text used it is possible to use Intelligent Text to reference a View Title. Intelligent Text is discussed later in the Training. View Type
A View type must be selected. The View Type option list displays the following options:
Modelled Wireline: produces slightly greater realism by blending the intersection of primitives, but without incurring the computational overheads of removing hidden lines.
Wireline: produces a conventional wireline picture showing all element and P-Points. This option is the quickest to generate the view graphics.
Wireline Hidden Line: produces an image where hidden lines are removed within individual significant elements (EQUI, SUBS etc...), but not from items hidden behind them.
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Local Hidden Line: produces a picture where all hidden lines are removed from equipment elements. Where two or more equipment elements overlap, the overlapping elements are shown in Wireline.
Global Hidden Line: produces a picture where all hidden lines are removed.
Universal Hidden Line: produces an image where all hidden lines are removed (as in Global Hidden Line), but in addition intersection lines between significant elements (e.g. EQUI and STRU, SUBS and BRAN) are generated.
For further representation examples refer to Appendix A.
Section Mode
A section mode must be selected. The Section Mode option list displays the following options:
Standard: this option sections all Design elements where appropriate.
Omit Fractional Pipe Components: this option removes any partial pipe components from the display, where the P0 is outside the front and back sectioning planes. All lengths of implied tube that are outside the front and back sectioning planes will be removed from the drawlist.
Style
The Style option list shows the available Representation Ruleset (RRST) elements that are used to control the display representation of the different types of Design elements within the View e.g.
element dependant line weights andcolour.
Representation Rulesets are created by the Draft Administrator.
Hatching Rules
The Hatching Rules option list displays the available Hatching Rulesets that are used to control the hatching of different types of Design elements that may be cut when a section is applied.
Hatching Rulesets are created by the Draft Administrator.
Change Rules
The Change Rules option list shows the available Change Rulesets that are used to control the appearance of changed Design elements and annotation on subsequent updates of the drawing.
For the use of Change Rulesets please refer to TM-1206 Drawing Production (Advanced).
Direction
The required View direction may be selected from an option list of pre-defined directions.
Alternatively, a View direction may be typed into the text box, e.g. N 45 E.
The Derived button will prompt the User to identify a design element in the Graphics area for setting the View direction.
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8.3.5 User-Defined View Form: Scale Tab
The Scale Tab allows Users to set a scale type (metric or imperial), apply a specific scale to the Drawlist, or Auto Scale the Drawlist before applying the nearest standard scale.Three types of scale are available from the options list;
Metric, Architectural, and Engineering.
Metric: this option allows the User to apply a unit-less scale to the Drawlist e.g. 1/10, 1/100, and 1/500
Architectural: this is an imperial unit option that expresses scales in terms of inches to the foot and is generally used for buildings and structures.
Engineering: this is an imperial unit option that expresses scales in terms of inches to the tens of feet and is generally used where larger scales are required.
Once the type of scale has been set the User can select a scale from the option list to apply to the Drawlist.
Alternatively, the user can make use of the Auto Scale and Nearest buttons to set a suitable scale based on the contents of the Drawlist and the size of the drawing selected.
Auto Scale
Auto Scale sets the view scale such that all of the design elements in the Drawlist will fit to the view frame. The actual scale will be displayed in the Scale text box. The Auto Scale operation also sets the through point to the Site coordinates corresponding to the centre of interest of the view. It is unlikely that the scale provided will conform to that of a recognised standard.
Nearest
The Nearest button selects the nearest available standard scale, as defined by the Draft Administrator, and sets it. The standard scales can also be selected from the scrollable list next to the Nearest button.
For Draft to calculate a scale, the Drawlist must contain elements.8.3.6 User-Defined View Form: Intelligent Text Tab
This tab contains the same parameters as those contained in the Department Attributes form.
Please refer to section 6.2.1.2 of the guide for further information.
8.3.7 User-Defined View Form: Attributes Button
Clicking the Attributes button on the User-Defined View form displays the User Defined View Attributes form.
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The following attributes of the View can be modified from this form:
Graphics Angle
The field controls the angle of the design graphics within the View. A positive angle results in an anti-clockwise rotation. The View direction remains the same.
View Orientation
The field controls the orientation of the View and the contents. The selectable directions correspond to the direction of the „top‟ of the view region relative to the top of the screen, e.g.
selection of Right will cause the View and the contents to be rotated through 90 degrees.
Arc Tolerance
The field controls the appearance of arcs within the View. Arcs are drawn as facetted approximations of a true „smooth‟ arc; this field controls the difference between the „true‟ and the
„facetted‟ representation. The representation is set in units of hundredths of a millimetre on the drawing (default value 15). The actual value used by DRAFT depends on the scale of the VIEW.
The lowest value that it may be changed to is 1. Although lower values will give a better representation, the time required to display the graphics is increased.
Perspective
Perspective can be used to give a perspective projection, the field value being related to the view angle. The default value of 0 results in a parallel projection.
Gapping
Controls the gap (in mm) inserted in view lines crossed by other lines such as centrelines.
Note Line
This option controls the appearance of the view frame (assuming it is visible). The value set will also be cascaded down to any Layers subsequently created. The Note line Pen may be a standard pen, or a user-defined pen set-up by the Draft Administrator
The colour assigned to the Note Line pen can be selected from the pull down menu. Alternatively, by clicking on the Pick button, a colour can be selected from the palette displayed.
The line style and thickness can be selected from the appropriate pull down menus.
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8.3.8 User-Defined View Form: Change Highlighting
Change highlighting and the associated rule sets are outside the scope of this training guide. Selecting the Show Changes Since check box without a rule set in place will result in an error message and the check box will automatically de-select.
For information on Change Rule sets and Change Highlighting please refer to TM-1206 Drawing Production (Advanced).8.3.9 User-Defined View Form: Date Stamp
The Stamp Date button opens the Set Comparison Date form and is used in conjunction with the Change Rules set on the General tab and the Show Changes since checkbox.
For information on the use of the Date Stamp please refer to TM-1206 Drawing Production (Advanced).
8.3.10 User-Defined View Form: Update Design on Apply?
Whenever any settings on the User-Defined View form are modified, the User must select Update Design and click Apply (or select Graphics > Update > Design from the main menu) to see the changes reflected in the Graphical View.
Selecting Use Background Process will start a background process for updating design.
For Drawing Production using a Background Process please refer to TM-1206 Drawing Production (Advanced).