Creating a third-person zombie horde shooter using DOTS – Unite Copenhagen
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The document discusses the development of a third-person zombie horde shooter using the DOTS (Data-Oriented Technology Stack) approach, with a focus on creating and updating world objects and enemies. It highlights key concepts such as the Entity Component System (ECS), job systems, and the Burst Compiler for optimizing performance. The conclusion emphasizes the viability of using a data-oriented mindset in game development.
Creating a third-person zombie horde shooter using DOTS – Unite Copenhagen
- 2. Creating a third-person zombie horde shooter with DOTS Simon Eliasson simon.eliasson@farnorthentertainment.com
- 3. Disposition ● The Game ● Introducing DOTS ○ Prelude & Planning ○ Static World Objects ○ Enemy Updates ● Conclusion
- 4. Project FNZ What are we working on?
- 6. Survival
- 10. Introducing DOTS How & why did we do it?
- 11. ● MVC pattern ● Server calculates ● Client observes ● Tick vs. Frame rate ● View bottleneck Architecture
- 12. ● Does it make sense? ● Why sceptical? ● Identify applications ○ Start small - world objects ○ Do enemies next Build-up
- 13. Archetypes & Archetype Chunks World Objects (ECS)
- 14. Archetypes & Archetype Chunks World Objects (ECS)
- 15. Code: Archetype
- 16. Archetypes & Archetype Chunks World Objects (ECS)
- 18. Instantiation & Destruction World Objects (ECS)
- 19. Instantiation & Destruction World Objects (ECS)
- 20. Instantiation & Destruction World Objects (ECS)
- 21. Instantiation & Destruction World Objects (ECS)
- 22. Recap World Objects (ECS) ● Data-oriented approach ● Archetype ● Archetype chunks ● Instantiation ● Destruction
- 23. The full DOTS experience Updating Enemies - ECS + Jobs + Burst Compiler
- 24. Enemy Requirements Updating Enemies - ECS + Jobs + Burst Compiler ● Archetype ○ Position + Rotation ○ Target Position ○ 3D Mesh ○ Enemy Tag ○ Animation Data ● System ○ Position Lerping ○ Animation Updates
- 25. Systems = ECS Updates Updating Enemies - ECS + Jobs + Burst Compiler
- 26. Systems = ECS Updates Updating Enemies - ECS + Jobs + Burst Compiler
- 27. Systems = ECS Updates Updating Enemies - ECS + Jobs + Burst Compiler
- 28. Code: Query
- 29. Why Data Layout Matters Updating Enemies - ECS + Jobs + Burst Compiler
- 30. Cache Optimization Comparison Updating Enemies - ECS + Jobs + Burst Compiler
- 31. Cache Optimization Comparison Updating Enemies - ECS + Jobs + Burst Compiler
- 32. Cache Optimization Comparison Updating Enemies - ECS + Jobs + Burst Compiler
- 33. Cache Optimization Comparison Updating Enemies - ECS + Jobs + Burst Compiler
- 34. Cache Optimization Comparison Updating Enemies - ECS + Jobs + Burst Compiler
- 35. The full DOTS experience Updating Enemies - ECS + Jobs + Burst Compiler
- 36. Job Systems Updating Enemies - ECS + Jobs + Burst Compiler
- 37. Job Systems Updating Enemies - ECS + Jobs + Burst Compiler
- 38. Job Systems Updating Enemies - ECS + Jobs + Burst Compiler
- 39. Job Systems Updating Enemies - ECS + Jobs + Burst Compiler
- 40. Job Systems Updating Enemies - ECS + Jobs + Burst Compiler
- 41. Code: Scheduling
- 42. Code: Execute
- 43. The full DOTS experience Updating Enemies - ECS + Jobs + Burst Compiler
- 44. The Burst Compiler Updating Enemies - ECS + Jobs + Burst Compiler Highly optimized machine code
- 45. The Burst Compiler - Highly Optimized Machine Code Updating Enemies - ECS + Jobs + Burst Compiler Highly optimized machine code
- 46. The Burst Compiler - Highly Optimized Machine Code Updating Enemies - ECS + Jobs + Burst Compiler
- 47. The Burst Compiler Updating Enemies - ECS + Jobs + Burst Compiler
- 48. The Burst Compiler Updating Enemies - ECS + Jobs + Burst Compiler
- 49. The full DOTS experience Updating Enemies - ECS + Jobs + Burst Compiler
- 50. The full DOTS experience Updating Enemies - ECS + Jobs + Burst Compiler
- 51. ● Archetype chunks gives optimal memory layout ● Systems ○ Looping over arrays instead of accessing GameObjects ○ Cache lines contains relevant data when updating ○ Utilizes CPU Cache, Avoids RAM accesses ● Job Systems - Uses all CPU cores to the fullest ● Burst Compiler ○ Produces highly optimized machine code ○ Targets specific CPU architecture of running machine Recap - Enemy Updates in DOTS
- 53. Conclusion ● GameObjects are not dead
- 54. Conclusion ● GameObjects are not dead ● DOTS hybrid is viable
- 55. Conclusion ● GameObjects are not dead ● DOTS hybrid is viable ● Embrace the data-oriented mindset
- 56. Conclusion ● GameObjects are not dead ● DOTS hybrid is viable ● Embrace the data-oriented mindset ● Consider using DOTS!
- 57. Unite Copenhagen 2019 Thank you! Simon Eliasson simon.eliasson@farnorthentertainment.com