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Tr3ChartItem = record
                 x,y,z      : double;
                 color      : TColor;
                 tag        : longint;
                 ItemKind   : Tr3Item;
                 x2,y2,z2   : double;
                 marklw     : byte;

This type declaration defines the basic element of the data container which stores the graphics items. Tr3ChartItem is normally not utilized by the user except for some special situations.

The variables declared in Tr3ChartItem have the following meaning:

x,y,z Coordinates of the position of the item. If an item is defined by two points (like a line), x, y, and z contain the first point (which is the reference point)
color The color of the item (if applicable).
Tag User defined tag
ItemKind indicates the type of the item (see Tr3Item for details).
x2,y2,z2 The second point of an item (in case of lines).
marklw The index of the used symbol, or the line width (see MarkAt, Line and DrawTo for details).

Last Update: 2012-Okt-20