SysML Design of Simulation Game
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The document outlines the design process of a simulation game using SysML, detailing the modeling of requirements, game structure, and interactive elements such as the forklift operations. It emphasizes the importance of requirement clarification and allocation to use cases, along with the integration of a physics engine for realistic gameplay. Additionally, it highlights challenges in code generation and potential future explorations for enhancing the game model.
SysML Design of Simulation Game
- 1. Copyright© 2014 SysML Design of Simulation Game David Hetherington V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 1
- 2. Copyright© 2014 Introduction V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 2 David Hetherington Odyssey of Homer Career ‐ Digital PBX ‐ Multimedia Audio ‐ Systems Management ‐ Software Internationalization ‐ Blade Servers ‐ Automotive Radar Chipset Current: Bring Modeling to Petroleum Industry
- 3. Copyright© 2014 Initial Inspiration V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 3 • Experienced operator had unloaded truck daily for 15 years – no problems. • Broke leg in a sporting accident. • Younger replacement was well trained… • And was spotted by another employee with a walkie‐talkie.. • But misjudged the slope backing down the ramp. • No serious injuries, but some damage to the forklift. • Incident investigation revealed a slight slope to the truck bed that the older operator had simply assimilated into his routine. Could we model this somehow?
- 4. Copyright© 2014 The OSHA Standard V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 4 https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9829
- 5. Copyright© 2014 Reformatting the Standard V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 5 Copy and paste from website to Excel. Looks nice, but format not ready for SysML tool input. Fortunately, a few simple VBA can dramatically reduce the pain of reformatting the data. Use 80/20 rule. Code 20% of VBA that yields 80% of benefit. Do rest by hand.
- 6. Copyright© 2014 Create a New SysML Model V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 6 Here we are using MagicDraw by NoMagic to create the model. Sparx Enterprise Architect will work well as well. Papyrus will be problematic because it has no ability to import requirements from a spreadsheet. That means that in any realistic project, the task of inputting (usually hundreds or even thousands of) requirements into a Papyrus model would be onerous. Most source requirements documents that you will encounter are not written by professional systems engineers. As such, the individual requirements contain too many different concepts. The requirement below is a good example. As such, in our new SysML model we will create packages for “Source” and “Clarified” requirements.
- 7. Copyright© 2014 Narrow Down Requirements V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 7 First we narrow down the requirements to those that are relevant to a training game, ie: the truck operations. Next we notice that the relevant requirements are in four sections… From which we make package names… And Load them into the model
- 8. Copyright© 2014 Load Source Requirements into the Model V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 8 Now we massage the requirements a little more… And load them into the model
- 9. Copyright© 2014 Create Clarified Requirements V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 9 Create clarified requirements. For example, text that contains two unrelated subjects should be broken into two separate requirements.
- 10. Copyright© 2014 Create Derive Relationships V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 10 Create Derive Requirements Relationships
- 11. Copyright© 2014 Allocate Requirements to Use Cases V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 11 (The anchored note is a really handy method for adding the text to a use case. Unfortunately, it is a vendor extension rather than a part of SysML)
- 12. Copyright© 2014 Model Structure of the Game V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 12 We design a basic game structure: 1. Welcome Screen 2. Some number of Game Levels 3. Closing Screen After starting the game, the player can select a level. If the player “wins” the level, play proceeds to the next level. If not, the player moves to the Closing Screen. The Closing Screen gives the player his score and also gives him the option of playing the game again (or exiting).
- 13. Copyright© 2014 Allocate Use Cases to Game Level Instances V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 13 Now we can allocate the use cases to specific Game Level instances. We can also make those specific Game Level instances “satisfy” the clarified requirements.
- 14. Copyright© 2014 Model State Machine for Avoid Edge Level V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 14 Now we have a behavior design for the level that we can design to and explore for potential code generation.
- 15. Copyright© 2014 Blender ‐ Overview • Open source • Amazing 3D rendering • “Toy Story” quality animation • Built‐In game engine • Challenging to learn, but very functional, and lots of help available on Youtube V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 15
- 16. Copyright© 2014 Blender – Model the Forklift V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 16 Find a brochure of a real forklift on the internet and use it as a background image in Blender to create a Bézier curve outline of the forklift cab. After that extrude the outline to create the initial body shell.
- 17. Copyright© 2014 Blender – Model the Forklift V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 17 Cut some horizontal holes, slice off pieces, add some surfaces Add textures and lettering And add a few more things…
- 18. Copyright© 2014 Avoid Edge Game Level – Create Platform V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 18 1. Create a platform 20m by 20m and 1m high. 2. Create a ramp up onto the platform 3m wide and 3m long. 3. Create 1m wide safety areas all around the platform that are planes positioned 2cm above the platform. 4. Add the forklift to the scene • Lighting is a headache... • Fonts/Text do not behave well. Convert “Asatte Lift” to a mesh. • Linked objects are a headache for the physics engine. For the moment, I have joined the forklift components into a single mesh.
- 19. Copyright© 2014 Add Basic Motion V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 19 Add keyboard controls to create basic motion of forklift. Very powerful. Note that we only need to push the forklift around. The physics engine will figure out the rest.
- 20. Copyright© 2014 Detect Entry into Ramp – 1 of 2 V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 20 1. Assign the Forklift object a property “ForkLift” 2. Assign the Ramp a sensor that notices a collision with “ForkLift” 3. Make that sensor send a broadcast message “StatusEnterRamp”
- 21. Copyright© 2014 Detect Entry into Ramp – 2 of 2 V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 21 The Status Text overlay (a separate blend file) receives the message and runs a script. Now we have the basic mechanics to implement the rest of the game and also connect the physics simulation to the Python scripting.
- 23. Copyright© 2014 Code Generation Issues V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 23 Issue Work Around Not much Python Code Convert More Logic Bricks to Python Tools SysML Tools don’t Generate Python Work from XMI file Use XSLT (Saxon) Use Microsoft Excel Visual Basic Final Game does not Quite Match Model Update the Model Open Source Code Generators
- 24. Copyright© 2014 Why Bother With Code Generation? V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 24 PowerPoint Compiler Draw Some Pretty Charts p Feed to PowerPoint Compiler Ship Finished Product Crack Open a Beer More Realistic View Model in SysML Prototype by Prototype by Hand Using Model Learn a *LOT* Update Model to Match Reality Custom Design Code Generator Generate & Hand‐Complete Production Code Verification and Validation Ship a Version of Product This vision is very appealing to marketing guys and non‐ technical executives…. Code generation becomes the path to replication of patterns and best practices across a large number of levels of a complex game.
- 25. Copyright© 2014 What Worked? What Didn’t Work? V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 25 Not so Great Great! Requirements Traceability SysML Model of Behavior Reliability of Game Code Generation SysML Model of Game Structure
- 26. Copyright© 2014 Future Exploration V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 26 Port to Commercial Game Engine Use SysML Parametrics to Model Physics Full Implementation of Code Generator Add Human Actors Model Forklift Controls More Accurately How to Test Fact Knowledge? How to Model Forklift and Working Area Inspections?
- 27. Copyright© 2014 Recommended Reading V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 27 Not for beginners, but very good working examples that you can studyBlender Foundations: The Essential Guide to Learning Blender 2.6 Roland Hess Good starting point for Blender basics before tackling game programming. Game Development with Blender Dalai Felinto, Mike Pan SysML Distilled: A Brief Guide to the Systems Modeling Language Lenny Delligatti UML and SysML together make a huge subject. This text does a nice job of presenting SysML concisely without getting lost in a forest of discussions of layers of metamodel abstraction.
- 28. Copyright© 2014 Questions/Comments/Suggestions… V1.0 ‐ 9 April 2014 SysML Design of Simulation Game 28 Send me an e‐mail: david.hetherington@asattepress.com My website: http://asattepress.com