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version 11.3
SVG_Define_marker (parentRef; id{; x; y{; width; height{; orientation}}}) 
ObjectReference
| Parameter | Type | Description | |
| parentSVGObject | SVG_Ref | | Reference of parent element |
| id | String | | Name of symbol |
| x | Number | | Coordinate on X axis of reference point |
| y | Number | | Coordinate on Y axis of reference point |
| width | Number | | Width of marker |
| height | Number | | Height of marker |
| orientation | Number | | Orientation of marker |
| Function result | SVG_Ref |  | Reference of marker |
Description
The SVG_Define_marker command creates a marker in the SVG container designated by parentSVGObject and returns its reference. If parentSVGObject is not an SVG document, an error is generated.
A marker object is used to draw an arrow or multiple markers (the points of a curve for example). A marker will be attached to an SVG element with the SVG_SET_MARKER command.
The id parameter specifies the name of the marker. The name will be used to associate a marker with an object. If an element with the same name exists, it will be replaced.
The optional x and y parameters specify the coordinates of the reference point that must line up exactly with the marker position
.
The optional width and height parameters specify the width and height of the rendered rectangle.
The optional orientation parameter can be used to adjust the orientation of the marker. A value included between 0 and 360 represents the angle between the X axis of the marker and that of the user space. If this parameter is omitted or if its value does not fall in the 0 - 360 interval, the placement will be calculated automatically by the rendering engine according to the object.
Example
Refer to the example of the SVG_SET_MARKER command.
See Also
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