Command
Command is where the actual functionality exists, and it's represented as a Node.
Code-wise, all Command types are derivation of Command. It is a class that mainly consists of a single executable method called Execute.
Command also have in-points and out-points that connect Nodes. In-points receive connections from out-points.
Notice that each command node may has different connection point color. Each color represents different connection type. Each connection will pass certain data, except for white connection. The white connection is called Main Connection, while the other colors are Property Connection.
In-points and out-points can only be connected if they are of the same color. To create a connection, we can left click or hold click an out-point of a certain command, and then left click an in-point of another command. To remove a connection, we can left click the dot in the middle of the connection line.
There are 2 types of Command:
- Main Command
- Property Command
1. Main Command
This type of command is inherited directly from Command class. A Main Command is a command that has at least a main connection (the white one). It's called Main since it's the command that directly follows the main flow.
Main Command's in-point can be connected from multiple out-points. But the out-point can't be connected to multiple in-points.
2. Property Command
This type of command is inherited from PropertyCommand class. A Property Command is a command that passes through property connection, and has no main connection. It is not directly a part of the main flow. It supposed to return a value as an input of another Main Command. A Property Command is indirectly called when another Main Command executes and accesses its in-point.
As opposed to Main Command: Property Command's in-point can't be connected from multiple out-points, since it will be ambiguous in which data to receive. But the out-point can be connected to multiple in-points since it only returns a data and does not mess with the flow.
On the example image above, Float Comparator command is called only because Branch Command is being called.