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.TH "SET RENDERING COLOUR MODEL" 3P "29 February 1991"
.SH NAME
SET RENDERING COLOUR MODEL \-
create a structure element to set current rendering colour model
.IX "Colour Model" "SET RENDERING COLOUR MODEL"
.SH SYNOPSIS
.SS C Syntax
.ft B
.ta 1.4i 3i
.nf
void
pset_rendering_colr_model( colour_model )
Pint	colour_model;	\fIcolour model\fP
.fi
.SS Required PHIGS Operating States
(PHOP, *, STOP, *)
.SH DESCRIPTION
.SS Purpose
\s-2SET RENDERING COLOUR MODEL\s+2 specifies the colour model in which
lighting calculation and colour interpolation are performed.
.\" .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 \fIcolour_model\fP
The defined rendering colour models are:
.sp
.nf
.ta .5i +\w'PRCM_WS_DEP    'u
0	PRCM_WS_DEP	
1	PRCM_RGB	\fIRed, Green, Blue Colour Model\fP
2	PRCM_CIE	\fICommission Internationale de l'Eclairage Colour Model\fP
3	PRCM_HSV	\fIHue, Saturation, Value Colour Model\fP
4	PRCM_HLS	\fIHue, Lightness, Saturation Colour Model\fP
.\" .SS C Output Parameters
.SS Execution
Depending on the edit mode, a \s-2SET RENDERING COLOUR MODEL\s+2 element
is inserted into the open structure after the element pointer, or
replaces the element pointed to by the element pointer.
When an element of this type is interpreted, the 
'current rendering model' entry in the traversal state list is set to
the value associated with the element. If the specific colour model is
not available, colour model 0, PRCM_WS_DEP, is used.
.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
.SH SEE ALSO
.nf
.IP
.ta 0.5i
.SM "INQUIRE RENDERING COLOUR MODEL FACILITIES (3P+)"
.fi