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-
- 10.2.1 PLOT RASTER
-
-
- The PLOT RASTER command is used to create a pixel-for-pixel image of the
- current drawing in the form of a raster image file for use by subsequent
- plot commands.
-
-
- COMMAND FORMAT
-
- #PLOT RASTER modifiers [:] or [return]
-
- If the command is terminated with a return, the whole of the current
- sheet is rasterised. If the command is terminated with a colon, a window
- can be digitised defining a smaller area to be rasterised.
-
-
- MODIFIERS
-
- TO Requires a filename used as the destination for the raster
- image file. If the modifier is not entered, the raster
- image will be saved to the file XCTEMP:rastc .
-
- Creating a disk based raster image file can take some time
- due to the large amount of I/O required. If this raster image
- file is going to be used immediately, it may be wise to
- assign XCTEMP to the RAM disk or to direct the raster image
- file to the RAM disk.
-
- To assign XCTEMP to the RAM disk, the AmigaDOS command
-
- >ASSIGN XCTEMP: RAM:
-
- can be used from a CLI task. To direct a raster image file
- to RAM, the command
-
- #PLOT RASTER TO RAM:name_of_plot_file
-
- can be used. ( See the AmigaDOS users manual for information
- on the RAM disk and the ASSIGN command ).
-
- DOTSPERINCH The required resolution in dots per inch of the raster
- image. This is obviously dependent on the plotter that
- will be used to output the final drawing. If no value is
- entered, the default is 300.
-
- SCALE A real value defining the scale of the plot in terms of
- the SHEET size. The default plot scale is 1.0 .
-
- COLOUR If this modifier is entered, colour information is saved
- with the raster image. This information can be interpreted
- by raster plotters with a colour capability. If the
- modifier is not used, no colour information will be saved
- with the raster image file.
-
- Note: rasterising a colour image can make the raster image
- file up to 3 times larger than a mono image file.
-
- .DITHER Specifies that coloured plots will be dithered to emulate
- the actual colours as seen on the screen. The dithering
- process uses a 2x2 pixel matrix to represent each pixel on
- the screen. A combination of yellow, magenta and cyan dot
- patterns are mixed in each 2x2 matrix to represent one of
- a possible 125 colours. In this way, the rasterisation
- process will produce a colour plot file using the colours
- as seen on the monitor.
-
- ROTATE This modifier will cause the raster image to be rotated
- through 90 degrees. The top left hand corner of the final
- plot will be the bottom left hand corner of what was the
- original image.
-
-
-