When running under X windows, mouse button 2 toggles the continuous display of the graphics cursor location. The PHYSICA keyword CUNITS is the units type for these numbers. If CUNITS = WORLD, the numbers depend on the current units type, either CM or IN, as chosen with SET UNITS. If CUNITS = GRAPH, the numbers displayed depend on the current graph axis scales. If CUNITS = PERCENT, the numbers depend on the current window.
If the \PERCENT qualifier is used, then the values of the coordinates will be interpreted as being in percentages of the current window, for example, (50,50) represents the centre of the current window. This is the default if no units qualifier is used.
If the \GRAPH qualifier is used, then the values of the coordinates will be interpreted as being in graph units, that is, the units defined by the minimum and maximum values for a graph. These units are taken from the last graph drawn, or, if no graph has been drawn yet, they are the default values: -1 <= x <= 1 and -1 <= y <= 1.
If the \WORLD qualifier is used, then the values of the coordinates will be interpreted as being in centimeters or inches, depending on the units type chosen with the SET UNITS command. The default world units are centimeters.
If the FIGURE command is entered interactively, the default is that confirmation that the figure is acceptable as drawn will be requested. The figure will not be be entered into the hardcopy plot file, or into an open EDGR file, unless it is acceptable. However, if CONFIRM has been disabled, the default will be that no such confirmation will be requested. If the \CONFIRM qualifier is used, confirmation will be forced. If the \NOCONFIRM qualifier is used, confirmation will be suppressed.
If a stack file is open, via the STACK command, then the (x,y) coordinates will be written to the stack file, even if they are chosen by the crosshair. Thus, when this stack file is executed, using the EXECUTE command, the graphics crosshair will not be used. If confirmation is requested and the figure is not OK, then the command will not be written to the stack file.
Syntax: FIGURE CIRCLE r { cx cy }
This command draws a circle centred at the point (cx,cy), with radius
r, which is in terms of the horizontal dimension. The graphics crosshair
is used if either cx or cy is not entered.
Syntax: FIGURE ARC { cx cy sx sy ex ey }
This command draws an arc of a circle centred at the point (cx,cy),
starting at the point (sx,sy) and finishing on the line through the
points (ex,ey) and (cx,cy). The first two points determine the radius
and the starting azimuth, while the final point determines the final
azimuth only. If the final point is the same as the first point, the
centre, then a complete circle will be drawn. The graphics crosshair is
used if any of the points are not entered.
Syntax: FIGURE WEDGE { cx cy sx sy ex ey }
This command draws a sector of a circle centred at the point (cx,cy),
starting at the point (sx,sy) and finishing on the line through the
points (ex,ey) and (cx,cy). The first two points determine the radius
and the starting azimuth, while the final point determines the final
azimuth only. The end points of the arc are joined to the centre of the
arc. If the final point is the same as the first point, the centre,
then a complete circle will be drawn. The graphics crosshair is used if
any of the points are not entered.
Syntax: FIGURE BOX { lowx lowy hix hiy }
This command draws a rectangle with lower left hand corner at (lowx,lowy),
and upper right hand corner at (hix,hiy). The graphics crosshair is used if
any of the points are not entered.
Syntax: FIGURE POLYGON n { cx cy sx sy }
This command draws a regular polygon with n vertices, centred at (cx,cy),
and with the first vertex at (sx,sy). The graphics crosshair is used if
any of cx, cy, sx, or sy are not entered.
Syntax: FIGURE ELLIPSE a b { cx cy } ang
This command draws an ellipse with a = major axis radius, b = minor
axis radius, centred at (cx,cy), and with the major axis at an angle
of ang, in degrees measured counter-clockwise from the horizontal. The
graphics crosshair is used if either cx or cy is not entered.
Syntax: FIGURE ARROW { sx sy ex ey }
This command draws an arrow with base at (sx,sy) and end at (ex,ey). The
graphics crosshair is used if any of sx, sy, ex, or ey are not entered.
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