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 as follows:

TUBEF, CLIN, PRFG, PLFG, PSYM, OBSTF and DLEV are standard Marine display representation controls and are not described here. (See the Design Reference Manual for further information.)

The style/colour attributes allow different parts of chosen items to be drawn differently, and are used as follows:

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

  FFSTYLE SOLID M FFCOLOUR 1

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

  FFSTYLE may be set to OFF to allow special effects.

• Centreline Style/Colour. These attributes control the style and colour to be used for representing centrelines. They are also used for drawing GRIDLN and LINE elements of Catalogue Components. When drawing pipework with TUBEF ON, CENTRELINE ON, the centreline will not be 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 will be drawn using the centreline style/colour of the STYL specified. For these DRAWIs the setting of the STYL’s centreline flag (CLFG) will be ignored even though the centreline style/colour is used; the LEVEL attribute should be used to control whether the DRAWI appears on the drawing. Set directly, for example,

  CKSTYLE DASHED CLCOLOUR 1

  Use a DASHED line of minimum thickness and Colour 1 for centrelines

• Backface Style/Colour. In hidden line VIEWs, these attributes control the style and colour 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 Colour 1 for the backface

  BFSTYLE would normally be set OFF for hidden line VIEWs, but if required can be used to set the style and colour to be used for drawing the rear edges of items. These attributes have no effect in wireline views. See Figure 4:2 below for an example of the use of the Backface Style/Colour.

  

  Figure 4:2. Use of Backface Style/Colour (shown dotted)

• Obscured Style/Colour. In global hidden line VIEWs, these attributes control the style and colour to be used to draw the front-facing edges of items that would otherwise be 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 Colour 1 for obscured front facing edges

  These attributes have no effect in wireline and local hidden line VIEWs. See Figure 4:3 for an example of the use of the Obscured Style/Colour.

  

  Figure 4:3. Use of the Obscured Style/Colour (shown dotted)

• Obscured and Backface Style/Colour. These behave in the same way as the Obscured Style/Colour but apply only when drawing backface lines that are also obscured. This allows obscured backface lines to be drawn in a different style/colour from other obscured lines, or switched off entirely. If these attributes are not set explicitly, they will match the Obscured style/colour. 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 and Backface style on, if both the general Obscured and Backface styles are also on.

  Attributes BOSTYLE, BOCOLOUR

• Obscured and Centreline Style/Colour. These behave in the same way as the Obscured Style/Colour but apply only when drawing centrelines that are also obscured. This allows obscured centrelines to be drawn in a different style/colour from other obscured lines, or switched off entirely. If these attributes are not set explicitly, they will match the Obscured style/colour. 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 and Centreline style on, if both the general Obscured and Centreline styles are also on.

  Attributes OCSTYLE, OCCOLOUR

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

  PLNSTYLE CHAINED PLNCOLOUR 1

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

  PLNSTYLE may be set to OFF.

• Member line Style/Colour. These attributes control the style and colour 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 Colour 1 for member lines

  MLNSTYLE may be set to OFF.

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

  PINSSTYLE SOLIDT PINSCOLOUR 1

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

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

See Colors and Styles for a description of colour and linestyle functionality.