This is specified by a Workstation Window volume in Normalized Projection Coordinates, and a Workstation Viewport volume in Device Coordinates. The Workstation Transformation always preserves the aspect ratio, and the default transformation will be used if the window or viewport volumes are not correctly set.
CALL GSWKW3(WKID, WKWN) CALL GSWKV3(WKID, WKVP)where WKWN and WKVP are real arrays of dimension 6 containing (XMIN, XMAX, YMIN, YMAX, ZMIN, ZMAX)
To inquire the range of device coordinates corresponding to a particular workstation type, it is possible to call the function GQDVOL (inQuire Display VOLume).
CALL GQDVOL (WTYPE, ERRIND, DCUNIT, RX, RY, RZ, LX, LY, LZ)The routine returns the units in which the display surface is measured (DCUNIT), and also the maximum x, y, and z values in each direction. Some devices, for example hardcopy plotters, are measured in metres (DCUNIT='GMETRE'), so the routine will return the actual size of the device. Other devices, for example graphics terminals, will be defined in raster or some other units (DCUNIT='GOTHU'). RX, RY, RZ are real device coordinates, and LX, LY, LZ are in integer raster units. The use of GQDVOL is analogous to the use of GQDSP, which is described in section on Page
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