Creating Custom 3D Network Visualizations with OPNET ModelerÂ®

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1588 Creating Custom 3D Network Visualizations with OPNET Modeler®The elevation lines are based on the same ‘Monterey’ terrain database as is currently shown in theOPNET 3D Network Visualizer. The tmm_data_directory preference is set to that same database sothat the simulation uses matching terrain elevation information.The apis fixed node contains a process model where you will use some of the Ovis APIs to create anentity and some decorations.The bradley mobile node is simply moving around the scenery along a trajectory. This node hasalready been fully written, with logic that uses op_ima_obj_pos_get every second to have theSimulation Kernel recompute its position. The code you will write for the apis node is going toassociate an Ovis entity with the bradley node. That entity requires explicit position updates fromthe Simulation Kernel to be moved in the OPNET 3D Network Visualizer. Such position updateswill occur explicitly in a simulation if the Kernel Procedure op_ima_obj_pos_get is invoked, orimplicitly if the node is involved in some communication. In this case there is no communication sowe need to have the explicit position updates.Too many position updates can affect performance due to the number of updates sent to the OPNET3D Network Visualizer. But too few position updates can result in entities appearing to move in avery jerky fashion in the Visualizer. There is no magic answer as to what is a good update frequencyrate; this is something that depends on what else is going on in your simulation.Adding Ovis Code7. Double-click on the apis node to open the o1588_lab1_ovis node model.8. If you do not wish to type the code, change the process model to the reference version.a) Right-click on the ovis module and select Edit Attributes.b) Click on process model attribute value and change it to o1588_lab1_ovis_ref.c) Click OK to save the attribute change.d) Select File > Save.e) Jump to the Viewing the 3D Items section.CONFIDENTIAL – RESTRICTED ACCESS: This information may not be disclosed, copied, or transmitted in any format without the prior written consent of OPNET Technologies, Inc.© 2010 OPNET Technologies, Inc.Page 6
1588 Creating Custom 3D Network Visualizations with OPNET Modeler®9. Double-click on the ovis module in the Node editor to open the o1588_lab1_ovis process model.Some of the code is already in place, and you will take care of filling in the rest.NEXT_SELF(time) is a macro that schedules a self-interrupt time seconds in the future. Thisapproach will be used during the simulation execution to use ODB and prostop to step quicklythrough the visualization code blocks while allowing review of each in the Visualizer. Thevisualization code blocks are going to be located in the Exit Executives of the various states.CONFIDENTIAL – RESTRICTED ACCESS: This information may not be disclosed, copied, or transmitted in any format without the prior written consent of OPNET Technologies, Inc.© 2010 OPNET Technologies, Inc.Page 7
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Creating Custom 3D Network Visualizations with OPNET ModelerÂ®

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