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.\"
.\" $XConsortium: p013,v 5.2 91/08/16 14:31:05 hersh Exp $
.\"
.\"
$XMCOPY
.\" Copyright (c) 1990, 1991 by Sun Microsystems, Inc. and the X Consortium.
.\"
.\" All Rights Reserved
.\"
.\" Permission to use, copy, modify, and distribute this software and its
.\" documentation for any purpose and without fee is hereby granted,
.\" provided that the above copyright notice appear in all copies and that
.\" both that copyright notice and this permission notice appear in
.\" supporting documentation, and that the names of Sun Microsystems,
.\" and the X Consortium not be used in advertising or publicity
.\" pertaining to distribution of the software without specific, written
.\" prior permission.
.\"
.\" SUN MICROSYSTEMS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
.\" INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
.\" EVENT SHALL SUN MICROSYSTEMS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
.\" CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
.\" USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
.\" OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
.\" PERFORMANCE OF THIS SOFTWARE.
.TH "CELL ARRAY 3 PLUS" 3P "29 February 1991"
.SH NAME
CELL ARRAY 3 PLUS \-
create a \s-23D\s+2 extended cell array element
.IX "CELL ARRAY 3 PLUS"
.SH SYNOPSIS
.SS C Syntax
.ft B
.ta 1.4i 3i
.nf
void
pcell_array3_plus ( paral, dim, colour_model, colrs )
Pparal *paral; \fIcell parallelogram: [0]=P; [1]=Q; [2]=R\fP
Pint_size *dim; \fIdimension of cell: DX and DY\fP
Pint colour_model; \fIcolour model\fP
Pcoval *colrs; \fIcolour array\fP
.fi
.SS Required PHIGS Operating States
(PHOP, *, *, *)
.SH DESCRIPTION
.SS Purpose
\s-2CELL ARRAY 3 PLUS\s+2 creates a \s-23D\s+2 cell array made of cells
filled with general colour in each cell. Its area is defined by three
points P, Q, and R in Modelling Coordinates giving the corners of a
parallelogram as P, Q, R and (Q+R-P).
.\" .LP
.\" This is a \s-2PHIGS\s0 Extension function based on
.\" \s-2PHIGS PLUS\s+2 and is not part of the
.\" \s-2PHIGS\s+2 standard.
.SS C Input Parameters
.IP \fIparal\fP
A pointer to an array of three Ppoint3 structures giving three corners of the
parallelogram that defines the area of the \s-2CELL ARRAY 3 PLUS\s+2
element. Pparal is defined in phigs.h as follows:
.sp .2
.nf
.ta .5i +1i +1i
.sp .2
typedef struct {
.sp .2
Ppoint3 p; /* point p */
Ppoint3 q; /* point q */
Ppoint3 r; /* point r */
.sp .2
} Pparal;
.IP
.fi
.IP \fIcolour_model\fP
The colour model for specified cell colours.
.sp
.nf
.ta .5i +\w'PMODEL_CIELUV 'u
0 PINDIRECT \fIColour Index Specified\fP
1 PMODEL_RGB \fIRed, Green, Blue Colour Model\fP
2 PMODEL_CIELUV \fICommission Internationale de l'Eclairage Colour Model\fP
3 PMODEL_HSV \fIHue, Saturation, Value Colour Model\fP
4 PMODEL_HLS \fIHue, Lightness, Saturation Colour Model\fP
.sp
.fi
.IP
.SS C Output Parameters
.IP \fIdim\fP
A pointer to a Pdim structure specifying the dimensions of the colour
cells array.
Pint_size is defined in phigs.h as follows:
.sp .4
.ta .5i +1i +1i
.nf
typedef struct {
.sp .2
Pint size_x; /* dimension (number of divisions) along X */
Pint size_y; /* dimension (number of divisions) along Y */
.sp .2
} Pint_size;
.fi
.IP \fIcolrs\fP
A pointer to an array of Pcoval of dimension defined by \fIdim\fP,
containing the colour values specifying cell colours.
Pcoval is defined in phigs.h as follows:
.bp
.ta .5i +1.5i +1i
.nf
typedef union {
.sp .2
Pint index; /* index in workstation colour bundle table */
Pcolr_rep direct; /* direct colour components */
.sp .2
} Pcoval;
.fi
.sp
Pcolr_rep is defined as:
.sp .4
.ta .5i +1i +1i
.nf
.sp .2
typedef union {
.sp .2
Prgb rgb; /* Red Green Blue colour specification */
Pcieluv cieluv; /* CIE L*U*V* colour specification */
Phls hls; /* Hue Lightness Saturation colour specification */
Phsv hsv; /* Hue Saturation Value colour specification */
Pdata unsupp; /* Colour in unsupported colour model */
.sp .2
} Pcolr_rep
.fi
.IP
Prgb is defined in phigs.h as follows:
.nf
.ta .5i +1i +1i
.sp .2
typedef struct {
.sp .2
Pfloat red; /* red, hue, etc */
Pfloat green; /* green, saturation, lightness, etc */
Pfloat blue; /* blue, value, saturation, etc */
.sp .2
} Prgb;
.fi
.IP
Pcieluv is defined in phigs.h as follows:
.nf
.ta .5i +1i +1i
.sp .2
typedef struct {
.sp .2
Pfloat cieluv_x; /* x coefficient */
Pfloat cieluv_y; /* y coefficient */
Pfloat cieluv_y_lum; /* y luminance */
.sp .2
} Pcieluv;
.fi
.IP
Phsv is defined in phigs.h as follows:
.nf
.ta .5i +1i +1i
.sp .2
typedef struct {
.sp .2
Pfloat hue; /* hue */
Pfloat satur; /* saturation */
Pfloat value; /* value */
.sp .2
} Phsv;
.fi
.IP
Phls is defined in phigs.h as follows:
.nf
.ta .5i +1i +1i
.sp .2
typedef struct {
.yp .2
Pfloat hue; /* hue */
Pfloat lightness; /* lightness */
Pfloat satur; /* saturation */
.sp .2
} Phls;
.fi
.IP
Pdata is defined in phigs.h as follows:
.nf
.ta .5i +1i +1i
.sp .2
typedef struct {
.sp .2
size_t size; /* size of data */
char *data /* pointer to data */
.sp .2
} Pdata;
.fi
.IP
.SS Execution
When the structure is traversed, the \s-2CELL ARRAY 3 PLUS\s+2 element
draws the transformed boundaries of the cell parallelogram, using the
polyline attributes currently in effect. This is the minimal simulation
for \s-2CELL ARRAY 3 PLUS\s+2.
.SS Attributes Applied
The attributes listed below are used to display the
\s-2CELL ARRAY 3 PLUS\s+2 primitive when the structure is traversed.
The Aspect Source Flags (\s-2ASF\s+2s) tell where to access the
output display attributes.
These attributes can come directly from the traversal state list,
or they can be accessed indirectly, using the appropriate index
in the traversal state list and the corresponding bundled
representation in the workstation state list.
.RS
.nf
.ta .5i +\w'back interior reflectance equation 'u
.sp
polyline colour polyline colour index \s-2ASF\s+2
linewidth scale factor linewidth scale factor \s-2ASF\s+2
linetype linetype \s-2ASF\s+2
polyline shading method polyline shading method \s-2ASF\s+2
polyline index
depth cue index
name set
.fi
.RE
.IP
.sp .2
.SH ERRORS
.IP 005
Ignoring function, function requires state
(\s-2PHOP\s+2, \s-2*\s+2, \s-2STOP\s+2, \s-2*\s+2)
.IP 117
Iqnoring function, one of the dimensions of the colour index array
is less than zero
.IP
.SH SEE ALSO
.nf
.IP
.ta 0.5i
.SM "CELL ARRAY 3 (3P)"
.fi
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