Autodesk 235B1-05A761-1301 User Guide - Page 769

If you create your own image before using Content Builder, you should save the image as a 256-color bitmap (BMP) image, 200 x 200 pixels in size. When creating your own image, it is also helpful to show dimensions and other information about the part (such as the UCS icon to represent the insertion point or arrows to represent the flow direction) to assist in selecting the part size. Connectors of a Block-Based Part In the block-based building environment, you can add connectors to the part. Connectors enable the part to be connected intelligently to other building systems objects in your layout. You can define one or more connectors for the part. IMPORTANT The number of connectors must be the same for all part sizes of a part family. When you add or delete a connector from a part family, all part sizes are updated. When you add a connector, you specify a domain. The domain is a predefined list that specifies the connection rules for a part. The domain is defined once for the part family and remains the same for all part sizes. Connectors belonging to a particular domain can connect to other parts of the same domain, but they cannot connect to components in other domains. For example, an MvPart representing an air handling unit might have the following domains specified for its connections: Connector Name inlet outlet power hot water in hot water out cold water in cold water out Description air entering the unit air leaving the unit electrical connection to the motor hot water entering the heating coil hot water leaving the heating coil cold water entering the chilling coil cold water leaving the chilling coil Domain duct duct conduit pipe pipe pipe pipe Block-Based Part Creation Overview | 751