Representation Styles

The Representation Style (STYL) defines the appearance of the elements specified by a RRUL that references it. The STYL attributes, with their defaults, are:

The style/color attributes allow different parts of chosen items to be drawn differently.

Note:
An 'item' corresponds to a 'significant element' in the Model hierarchy which may be composed of lower level elements. The concept of backface and obscured applies to the item as a whole. The hidden parts of the item itself will be backface, but parts of a different item below it will be obscured. For example, a FRMW or SBRF framework is an item in this sense (as they are significant elements) and any GENSECs owned by it are part of the same framework. GENSECs within a framework will not obscure each other as they are part of a single item. However, GENSECs in one framework will obscure GENSECs in a different framework (for global and universal view types).

• Frontface Style/Color. In wireline VIEWs these attributes control the style and color to be used to represent all edges. All edges display, except for holes that are drawn with a dashed line of the same color as the FFCOLOUR. Set directly, for example:

  FFSTYLE SOLID M FFCOLOUR 1

  Use a SOLID line of MEDIUM thickness and Color 1 for the frontface

  FFSTYLE can be set to OFF to allow special effects.

• Centerline Style/Color. These attributes control the style and color to be used for representing centerlines. They are also used for drawing LINE elements of Catalogue Components. When drawing pipework with TUBEF ON, centerLINE ON, the centerline is not obscured by the piping Components. (Unlike FFSTYLE, it is not necessary to superimpose two VIEWs with different Styles.

  DRAWI elements owned by EQUI, SUBE, STRU, SUBS, or PTRA are drawn using the centerline style/color of the STYL specified. For these DRAWIs the setting of the STYL’s centerline flag (CLFG) is ignored even though the centerline style/color is used; the LEVEL attribute is used to control whether the DRAWI displays on the drawing. Set directly, for example,

  CKSTYLE DASHED CLCOLOUR 1

  Use a DASHED line of minimum thickness and Color 1 for centerlines

• Backface Style/Color. In hidden line VIEWs, these attributes control the style and color to be used to draw the rear edges of items (set to OFF by default). Set directly, for example,

  BFSTYLE DOT BFCOLOUR 1

  Use a DOTTED line of minimum thickness and Color 1 for the backface

  BFSTYLE is normally be set OFF for hidden line VIEWs, but if required can be used to set the style and color to be used for drawing the rear edges of items. These attributes have no effect in wireline views. The example indicates the use of the Backface Style/Color.

  

• Obscured Style/Color. In global hidden line VIEWs, these attributes control the style and color used to draw the front-facing edges of items that are otherwise obscured by other objects (set to OFF by default). Set directly, for example,

  OBSTYLE DOT OBCOLOUR 1

  use a DOTTED line of minimum thickness and Color 1 for obscured front facing edges

  These attributes have no effect in wireline and local hidden line VIEWs. The example indicates the use of the Obscured Style/Color.

  

• Obscured Backface Style/Color. These behave in the same way as the Obscured Style/Color but apply only when drawing backface lines that are also obscured. This allows obscured backface lines to be drawn in a different style/color from other obscured lines, or switched off entirely. If these attributes are not set explicitly, they will match the Obscured style/color. Once they are set explicitly on a style element, they will have their own values and will need to be maintained independently on that style element. Note that it is only possible to switch the Obscured Backface style on, if both the general Obscured Backface styles are also on.

• Attributes BOSTYLE, BOCOLOUR

• Obscured centerline Style/Color. These behave in the same way as the Obscured Style/Color but apply only when drawing centerlines that are also obscured. This allows obscured centerlines to be drawn in a different style/color from other obscured lines, or switched off entirely. If these attributes are not set explicitly, they will match the Obscured style/color. Once they are set explicitly on a style element, they will have their own values and will need to be maintained independently on that style element. Note that it is only possible to switch the Obscured centerline style on, if both the general Obscured centerline styles are also on.

• Attributes OCSTYLE, OCCOLOUR

• P-line Style/Color. The attribute controls the style and color to be used to draw p-lines. Set directly, for example:

  PLNSTYLE CHAINED PLNCOLOUR 1

  Use CHAINED lines of minimum thickness and Color 1 for p-lines

  PLNSTYLE can be set to OFF.

• Member line Style/Color. These attributes control the style and color to be used to draw SCTN and GENSEC member lines. Set directly, for example:

  MLNSTYLE SOLIDT MLNCOLOUR 1

  Use a SOLID line of thickness 0.4mm and Color 1 for member lines

  MLNSTYLE can be set to OFF.

• Pipe Insulation Style/Color. These attributes control the style and color to be used to draw Piping Insulation. Set directly, for example:

  PINSSTYLE SOLIDT PINSCOLOUR 1

  Use a SOLID line of thickness 0.4mm and Color 1 for piping insulation lines

  PINSSTYLE can be set to OFF. Piping Insulation is only drawn if the INSU flag is True.

The color and linestyle functionality is described. See Colors and Styles for further information.