Name

PGTSK − Returns the 2D coordinates of the points in a stroke. 

Operating States: PHOP, WSOP, ∗, ∗
PHIGS standard function
 

Syntax

PGTSK (N, VIEWI, NP, PXA, PYA)

Argument     Data Type      Access    Description
---------------------------------------------------------------------------
N            Integer        Read      Maximum number of points
VIEWI        Integer        Write     View index
NP           Integer        Write     Number of points written
PXA(N),      Array of       Write     Points in the stroke, in
PYA(N)       reals                    world coordinates (X1, Y1,...,
                                      X[NP], Y[NP])
---------------------------------------------------------------------------

Description

PGTSK obtains information contained in the current event report entry.  If the report contains input generated by anything other than a stroke-class input device, a call to this function generates an error.  (See the PWAIT function for more information about input classes and the current event report.) 

The PGTSK function returns the world coordinate points and the view index of the view transformation Digital PHIGS uses to translate the normalized projection coordinate points to the world coordinate points.  This function ignores the z-coordinate components and returns a two-dimensional result. 

Digital PHIGS uses the current workstation transformation to translate the device coordinate points to normalized projection coordinate points.  See Getting Started with DEC PHIGS for more information on view indexes. 

See Also

PWAIT
PFLUSH
PGTSK3
PINSK
PRQSK
PSMSK
PSSKM
PSVTIP