Logic

Each Object Type can have Logic assigned to it, this logic is shared with each Object Instance that uses the definition, allowing you to very efficiently define behaviour that is shared among many objects. Object logic only runs for objects that are currently active, that includes any Map level objects which are global and active all the time, any dynamic objects, and any room objects for the current location only.

Each Room Type can have Logic assigned to it in the same way as an Object Type. Each Location that uses the room definition shares the logic in the same way an Object Instance does. Room logic only runs for the current Location.

Each Screen can have Logic assigned to it, this is typically used to manage the elements in the screen, primarily the instruments. Screen logic only runs for the current screen.

In addition to each of the individual locations listed above, a Kwyll game can have some global logic that will execute all the time irrespective of location and screen.

Each of the logic locations listed above are potentially active logic sections, that means that Kwyll will run certain flows on them at the appropriate time, for example the Always flows will run ever frame, the Object Hit flows will run when an object intersection is detected. Shared logic is different. It offers a means to create sections of logic that can be reused, effectively creating custom nodes. Shared logic consists of Subgraphs which are equivalent to subroutines in many common programming languages. They can take an arbitrary number of inputs and output an arbitrary number of results.

Subgraphs are a very powerful concept in Kwyll that gives both the ability to optimise and streamline your logic creation with custom nodes, and share those custom nodes with others.