Positioning Spot

A positioning spot controls the positioning of an entity on a location, resource, or path. It also controls the positioning of an entity or resource on a path. There are two types of positioning spots: entity spots and alignment spots.

Entity spots can be defined for a graphic in either the Graphic Editor or in the Locations module. Alignment spots can only be defined for a graphic in the Graphic Editor. In the Graphic Editor, the button showing the red circle with the white X represents the positioning spot. The default type is entity spot. To change the type, the user may double click on the spot to display the Spot Type dialog. This allows the user to define the type of positioning spot.

A graphic may have any number of entity spots. A graphic may also have any number of alignment spots. However, only the first alignment spot defined will be used. An entity or alignment spot is ignored if it is inapplicable for the model element it is used to represent. The following definitions explain uses of the entity and alignment spots for locations, entities, and resources.

How to place a positioning spot on an icon:

1. Select the positioning spot tool from the button bar.

2. Click on the icon where the entity is to appear.

Location Graphics May only use entity spots. Whenever an entity arrives at the location, the entity graphic will be placed on the first entity spot defined for the location. The next arriving entity will use the entity spot defined second, and so forth. If entity spots are defined for a location graphic in the Locations module, they are used ahead of any entity spots defined in the Graphic Editor. If no entity spot is defined for the location graphic, no entity is shown on the location.

Entity Graphics Use only alignment spots. When an alignment spot is defined for an entity graphic, the entity graphic will be positioned so the alignment spot of the entity graphic and the entity spot for the location or resource graphic are aligned. If the entity is traveling along a path, the entity graphic will move along the path with the alignment spot and the path segment or node aligned. If no alignment spot is placed on an entity graphic, the center of the entity graphic is used for alignment.

Resource Graphics May use both entity spots and alignment spots. An entity spot on a resource graphic may be used to locate an entity a resource is carrying. An alignment spot can be placed on a resource graphic so that when the resource travels along a path, the resource graphic will move along the path with the alignment spot and the path segment or node aligned. If no alignment spot is placed on a resource graphic, the center of the graphic is used for alignment.