Introduction to EON SDK - Construction IT research at VTT

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User Guide Techniques Wizards The wizards delivered with EON SDK are accessed from the Projects tab of the File>New dialog box in Visual Studio. EON Node Wizard Figure 5. EON Node Wizard in New Project Dialog 1. Select EON Node Wizard. 2. Enter a project name. Note that the project name must not include spaces or special characters. 3. Select the physical location for the project. 4. Select Create new workspace to create a new node package. Use Add to current workspace to add nodes to an existing node package. To do this enter a temporary project name (for example, Added), select the Add to current workspace option and click OK. If Visual Studio was properly configured, this project will be deleted automatically from the workspace. If the project is not automatically deleted, Visual Studio will ask you to locate the project file (called Added.dsp, if we use the above example) when you reopen your workspace. If this happens, select Cancel and delete the missing project from your workspace. 6. Click OK. Figure 6. EON Node Wizard dialog box 7. After opening a new node project, the EON Node Wizard dialog box will appear. 8. Enter the new node name. E.g. “MyNode”. 20 EON SDK 2.53.0
User Guide Wizards 9. Select which node group the node should belong to. New node groups may be created. 10. Enter your node’s property page name. If you leave this field empty the property page name will be the same name you gave the node with “PP” as a prefix. E.g. “PPMyNode”. This to avoid identical class names. 11. Select the number of properties page tabs. If multiple tabs a number will be added to the class name. E.g. “PPMyNode”, “PPMyNode_2” and “PPMyNode_3” 12. Selected or deselect methods depending on the features you want to add to your node. Node methods Serialize If the node should be able to store data types other than those defined by the EON standard, the Store non-field data option should be selected. The generated C++ skeleton code will include a Serialize() function, where calls to the standard CArchive() functions (Read() / Write()) should be specified. See the MFC documentation for more information. Update If the node should perform tasks once per frame, select this option. The generated C++ skeleton code will include an Update() function that will be called before each frame is drawn. This is where update code should be placed. NOTE: Use this option sparingly to avoid burdening your system. Most nodes need not be updated at every frame. These can be set to respond only when they receive events. EventsProcessed If this option is selected, an EventsProcessed() function will be added to the node’s C++ skeleton code. This function will be called once per frame if an event has been received since the previous frame was drawn. This is useful if data arrives at a higher rate than the frame rate, but when just the computed results (based on the incoming data) of the complex calculations are needed. IsSensor Override this function to prevent the baseclass implementation that returns FALSE. If your implementation returns TRUE your node is a sensor, i.e. it can generate out-events without first getting an inevent. 13. Visual Studio will confirm your actions in the New Project Information window. Click OK to continue. 14. Visual Studio will ask you to close and reopen your workspace. Click OK to continue, and go to the File menu to close and reopen 2.5 21
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