Tracing can be enabled for individual points within an ArtiSynth model. This causes the point to remember the path it followed since tracing was enabled, and to render this within the viewer as strip of line segments.
Tracing is enabled by setting a point’s tracing property to true in the point’s property panel (see Section 6.1). When enabled, the point keeps a list of all the positions that it has occupied since since tracing was first enabled, and renders them as a series of line segments in the viewer.
Disabling the tracing property causes the trace data to be discarded and it’s rendering to be removed.
When tracing is enabled, the point’s render properties are expanded to include line properties. Adjusting these allow the user to control how the trace path is rendered. When tracing is disabled, these line properties are removed.
Since a point’s render properties are modified when tracing is enabled or disabled, any existing open rendering property panels for the point will no longer work correctly. Instead, the panel should be closed and reopened.
It may be desirable to restrict rendering to view only the traces paths, perhaps along with a few selected model components. For instance, this might be necessary when producing graphs for a paper.
An easy way to do this is to edit the render properties for the desired points, and set the visible property to be explicitly true. Then, edit the render properties for the top-level model in the scene, and set its visible property to be explicitly false. This will make invisible all model components whose visible property is inherited. Since the traced points were explicitly set to be visible, they (and their traces) will remain visible. If the points themselves are rendered as spheres, they can be made to disappear by setting their pointStyle property to POINT, or by setting their pointRadius property to something very small.