POLYLINE SET 3 WITH COLOUR

PPLS3C

CALL SEQUENCE

CALL PPLS3C(VFLAG, CTYPE, NCC, NPL, IXA, PXA, PYA, PZA, VCOLI, VCOLR)

INPUT PARAMETERS

INTEGER VFLAG

Data per vertex data flag (PCD,PCDC)

INTEGER CTYPE

Colour type

INTEGER NCC

Number of components of colour value

INTEGER NPL

Number of points lists

INTEGER IXA (NPL)

Array of end indices for point lists

REAL PXA (IXA(NPL))

REAL PYA(IXA(NPL))

REAL PZA(IXA(NPL))

Coordinates of points (MC)

INTEGER VCOLI (IXA(NPL))

Vertex colour indices

REAL VCOLR (NCC*IXA(NPL))

Vertex colour values

PHIGS STATE

EFFECT

This function specifies the geometrical characteristics of the polyline set with colour primitive.

The POLYLINE SET 3 WITH COLOUR element is inserted in the open structure after element pointer or replaces the element indicated by element pointer, depending on the edit mode value. Element pointer is updated and points to the POLYLINE SET 3 WITH COLOUR structure element. The values specified in the function are associated with the element.

When an element of this type is interpreted, an unconnected set of polylines is generated. One polyline is defined by each list of vertex data. The current values of the polyline set 3 with colour attributes specified in and stored in the traversal state list are bound to the primitive. Colours can be specified for each vertex. Others data are ignored. When colours are specified, if polyline shading method is NONE, each polyline segment is drawn using the colour of the first vertex of the segment. If polyline shading is COLOUR, a colour interpolation is realized.

A POLYLINE SET 3 WITH COLOUR element containing no vertex points will be placed in the open structure. When such an element is interpreted it will have no visual effect. A polyline set 3 with data primitive containing one or more vertex data lists with less than two vertices will be placed in the open structure. When such an element is interpreted the lists with insufficient data will have no visual effect.

Attributes associated with Polyline With Colour:

LINETYPE

LINEWIDTH SCALE FACTOR

POLYLINE COLOUR

EXTENSION TO THE PHIGS STANDARD

If used in NRS mode, the effect of this function is different from the effect described in the standard.

In NRS mode, (see OPEN PIPE), the element is not stored in a structure. It is sent to the workstation on which the pipe is opened.

ERRORS

5

Ignoring function, function requires state (PHOP,*, STOP,*)

SEE ALSO

open structure, open pipe (ext), set polyline index, set linetype, set linewidth scale factor, set polyline colour index, set polyline colour, set polyline shading method, set depth cue index, polyline set with colour, polyline 3, inquire current element content, inquire current element type and size