PGPLOT Module: PGQCS -- inquire character height in a variety of units
SUBROUTINE PGQCS(UNITS, XCH, YCH)
INTEGER UNITS
REAL XCH, YCH
Return the current PGPLOT character height in a variety of units.
This routine provides facilities that are not available via PGQCH.
Use PGQCS if the character height is required in units other than
those used in PGSCH.
The PGPLOT "character height" is a dimension that scales with the
size of the view surface and with the scale-factor specified with
routine PGSCH. The default value is 1/40th of the height or width
of the view surface (whichever is less); this value is then
multiplied by the scale-factor supplied with PGSCH. Note that it
is a nominal height only; the actual character size depends on the
font and is usually somewhat smaller.
Arguments
UNITS (input) : Used to specify the units of the output value:
UNITS = 0 : normalized device coordinates
UNITS = 1 : inches
UNITS = 2 : millimeters
UNITS = 3 : pixels
UNITS = 4 : world coordinates
Other values give an error message, and are
treated as 0.
XCH (output) : The character height for text written with a
vertical baseline.
YCH (output) : The character height for text written with
a horizontal baseline (the usual case).
The character height is returned in both XCH and YCH.
If UNITS=1 or UNITS=2, XCH and YCH both receive the same value.
If UNITS=3, XCH receives the height in horizontal pixel units, and YCH
receives the height in vertical pixel units; on devices for which the
pixels are not square, XCH and YCH will be different.
If UNITS=4, XCH receives the height in horizontal world coordinates
(as used for the x-axis), and YCH receives the height in vertical
world coordinates (as used for the y-axis). Unless special care has
been taken to achive equal world-coordinate scales on both axes, the
values of XCH and YCH will be different.
If UNITS=0, XCH receives the character height as a fraction of the
horizontal dimension of the view surface, and YCH receives the
character height as a fraction of the vertical dimension of the view
surface.