VDC_TO_WC(3G)

NAME

vdc_to_wc − transform a Virtual Device Coordinate point to a World Coordinate point using the inverse of the current transformation matrix.

SYNOPSIS

C SYNTAX

void vdc_to_wc(fildes,vdcx,vdcy,vdcz,wcx,wcy,wcz);
int fildes;
float vdcx,vdcy,vdcz,*wcx,*wcy,*wcz;

FORTRAN77 SYNTAX

        subroutine vdc_to_wc(fildes,vdcx,vdcy,vdcz,
        wcx,wcy,wcz)
        integer*4 fildes
        real vdcx,vdcy,vdcz,wcx,wcy,wcz

PASCAL SYNTAX

procedure vdc_to_wc (fildes:integer;vdcx,vdcy,vdcz:real;
var wcx,wcy,wcz:real);

HP-UX COMPATIBILITY

Level: HP-UX/STANDARD

Origin: HP

DESCRIPTION

INPUT PARAMETERS

fildes
is an integer file descriptor returned by gopen when an I/O path to a graphic device is opened.
vdcx,vdcy,vdcz
are Virtual Device Coordinates, specified as real (float) numbers, to be transformed into World Coordinates.

OUTPUT PARAMETERS

wcx,wcy,wcz
are the World Coordinates.

DISCUSSION

The inverse of the Current Transformation matrix is calculated only if the Current Transformation Matrix has been changed since it was last calculated.
The current dimension mode (2-dimension or 3-dimension) is used when deciding how the matrix multiplication is to be performed. This mode is set by the THREE_D parameter of the gopen procedure.

DEFAULT

2-dimensional multiplication.

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