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Pipeline Design

Pipeline Design. François Paradis Jonathan T-Delorme Ubisoft – Québec Studio – Onyx Team Featuring Scott Pilgrim vs. The World. A non-intrusive data driven architecture. WORLD 1 INTRODUCTION. The Plan. WORLD 3 DATA INHERITANCE. WORLD 2 REFLECTION. WORLD 4 EDITOR EXPERIENCE.

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Pipeline Design

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  1. Pipeline Design François Paradis Jonathan T-Delorme Ubisoft – Québec Studio – Onyx Team Featuring Scott Pilgrim vs. The World A non-intrusive data driven architecture

  2. WORLD 1 INTRODUCTION The Plan WORLD 3 DATA INHERITANCE WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  3. Our Job classGameObject { /* Game Logic ... */ Vector2position; Animation* animation; }; classHipster : publicGameObject { • /* Game Logic ... */ inthealth; intspeed; intstrength; Behavior* behavior; }; classTrashCan : publicGameObject { inthitsBeforeBreaking; }; 1. Introduction

  4. Production mode Game mode Tools programmer Engine programmer Everythingcan change Much more static Focus on productivity Focus on efficiency C# C++ But we all work together ! 1. Introduction

  5. Need for Abstraction classHipster : publicGameObject { public: /* Game Logic ... */ private: inthealth; intspeed; Behavior* behavior; }; Edition intstrength; Serialization Versioning classHipster : publicGameObject { public: /* Game Logic ... */ private: inthealth; intspeed; intstrength; E_StrengthnewStrength; Behavior* behavior; }; • /* Auto-generated */ • virtualvoidSerialize(Serializer & serializer) • { • super::Serialize(serializer); • serializer >> health; • serializer >> speed; • serializer >> strength; • serializer >> behavior; • } 1. Introduction

  6. Need for Reusability 1. Introduction

  7. Need for Reusability 1. Introduction

  8. WORLD 1 INTRODUCTION The Plan WORLD 3 SPECIALIZATION WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  9. WORLD 1 INTRODUCTION The Plan WORLD 3 SPECIALIZATION WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  10. Runtime Reflection (.Net Framework) • Has a runtime cost • Can get messy in C++ • Offline Reflection • Less intrusive • Can still generate engine code Reflection Archetypes 2. Reflection

  11. Data Flow: Parsing Engine and Gameplay C++ Code Reflection Type Info Serialization Parsing Reflection Package 2. Reflection

  12. Data Flow: Instances Reflection Type Info Serialization Game Data (Tool compatible) Instantiation Instances in Game Editor 2. Reflection

  13. Data Flow: Launch EngineExecutable Binarization Launch Binary Data (Engine compatible) Instances in Game Editor 2. Reflection

  14. Data Flow Game Data (Tool compatible) Parsing Engine and Gameplay C++ Code Reflection Type Info Serialization Compilation Instantiation Instances in Game Editor Binarization EngineExecutable Binary Data (Engine compatible) 2. Reflection

  15. Syntax Parsing Engine and Gameplay C++ Code Reflection Type Info //<> Category("Actors") reflectedclassHipster : publicGameObject { private: • //<> Description("Health of the hipster") DefaultValue(40) reflectedinthealth; reflectedintspeed;//<> Category("Gameplay") DefaultValue(20) reflectedintstrength;//<> Category("Gameplay") DefaultValue(20) reflectedBehavior*behavior;//<> DefaultValue(IdleBehavior) reflection_statement ( • reflectedstringcomment; • ) }; 2. Reflection

  16. WORLD 1 INTRODUCTION The Plan WORLD 3 DATA INHERITANCE WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  17. WORLD 1 INTRODUCTION The Plan WORLD 3 DATA INHERITANCE WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  18. HIPSTER TONY POS 0,0 HP 40 SPD 20 … A Typical Case POS 0,0 HP 40 SPD40 … BEN POS 0,0 HP 40 SPD15 … 3. Data Inheritance

  19. POS 6,3 HP 40 SPD40 … A Typical Case POS 0,2 HP 40 SPD 20 … POS 4,1 HP 40 SPD15 … 3. Data Inheritance

  20. POS 0,2 HP 40 SPD 20 … POS 6,3 HP 40 SPD40 … POS 0,2 HP 40 SPD 20 … POS 6,3 HP 40 SPD40 … POS 4,1 HP 40 SPD15 … A Typical Case POS 4,1 HP 40 SPD15 … POS 0,2 HP 40 SPD 20 … POS 6,3 HP 40 SPD40 … POS 4,1 HP 40 SPD15 … 3. Data Inheritance

  21. STOP ? ? ? POS 0,2 HP 40 SPD 20 … POS 6,3 HP 40 SPD40 … ? POS 0,2 HP 40 SPD 20 … POS 6,3 HP 40 SPD40 … ? POS 4,1 HP 40 SPD15 … ? POS 4,1 HP 40 SPD15 … A Typical Case ? ? POS 0,2 HP 40 SPD 20 … POS 6,3 HP 40 SPD40 … ? POS 4,1 HP 40 SPD15 … 3. Data Inheritance

  22. HP 50 … HP 50 … HP 50 … HP 50 … HP 50 … HP 50 … A Typical Case DATA INHERITANCE ! HP 50 … HP 50 … HP 50 … 3. Data Inheritance

  23. Data Inheritance • Data reusability requires some relationship between different pieces of data. • Natural way of expressing edition problems. • Like styles in Word. • We embraced this paradigm completely. • Every piece of data can be specialized. 3. Data Inheritance

  24. Similarity with Code • class Tony : public Hipster • { • virtual void Attack() • { … } • virtual void Block() • { /* New Behavior */ } • }; • classHipster • { • virtual void Attack() • { … } • virtual void Block() • { … } • }; • classThatHipster: public Tony • { • virtual void Attack() • { /* New Behavior */ } • virtual void Block() • { … } • }; • classThatHipster: public Hipster • { • virtual void Attack() • { /* New Behavior */ } • virtual void Block() • { … } • }; 3. Data Inheritance

  25. Specializing Properties HP 40 SPD STR 20 20 40 25 HP SPD STR 30 40 25 HP 50 SPD30 STR 30 HP 50 SPD 40 STR 30 3. Data Inheritance

  26. Specializing Behavior 3. Data Inheritance

  27. Specializing Graphics 3. Data Inheritance

  28. Specializing by Platform 3. Data Inheritance

  29. Specializing Composition Physics Physics AI AI Physics 3. Data Inheritance AI

  30. Specializing Composition 3. Data Inheritance

  31. Deadly Diamond HP 40 GAME BOY TONY HP 30 HP 50 TONY ON GAME BOY? HP??? 3. Data Inheritance

  32. Deadly Diamond (Solution) « TONY » CONTEXT WINS HP 50 (DEFINE CONTEXT PRIORITY) 3. Data Inheritance

  33. HP 40 BASE HIPSTER * 3 TYPES * 200 INSTANCES PER LEVEL * 15 LEVELS* 5 PLATFORMS * 2 SKUS PER PLATFORM * ANY ARBITARY CRITERION=!!! HP 40 Scalability HP 40 HP 40 HP 40 3. Data Inheritance HP 40

  34. - STRENGTH SAVE DELTAS ONLY!! POSSIBLE BECAUSE OF OFFLINE REPRESENTATION OF DATA Scalability + POSITION + BEHAVIOR 3. Data Inheritance

  35. EACH VALUE IS IMPLEMENTED WITH A SORTED ARRAY HP Implementation BASE HIPSTER 30 PS3 40 TONY 50 TONY (SCENE 2) 55 TONY/PS3 45 3. Data Inheritance

  36. QUERYING AN EXISTING VALUE (PS3) HP Implementation BASE HIPSTER 30 PS3 40 TONY 50 TONY (SCENE 2) 55 TONY/PS3 45 3. Data Inheritance

  37. QUERYING AN INHERITED VALUE(STRONG, PS3, LEVEL2) HP Implementation BASE HIPSTER 30 PS3 40 TONY 50 TONY (SCENE 2) 55 TONY/PS3 45 3. Data Inheritance

  38. WRITING A VALUE(TONY SCENE 2/PS3) HP Implementation BASE HIPSTER 30 PS3 40 TONY 50 TONY (SCENE 2) 55 TONY (SCENE 2)/PS3 45 TONY/PS3 45 3. Data Inheritance

  39. RESETTING A VALUE(TONY SCENE 2) HP Implementation BASE HIPSTER 30 PS3 40 TONY 50 TONY (SCENE 2) 55 TONY/PS3 45 3. Data Inheritance

  40. SPECIALIZATION LIST SCENE 2 A B C D A B E C D Implementation PS3 A B’ C D A B’ E C D 3. Data Inheritance

  41. LEVEL A LEVEL A (PS3) 2 1 1 Interface LEVEL A, TONY 1 2 LEVEL A, TONY 2 HP SPD STR LEVEL A, TONY 2, PS3 3. Data Inheritance ALL HIPSTERS

  42. EACH INSTANCE IS A PROXY IREFLECTED Interface HP IREFLECTED SPD STR 3. Data Inheritance ALL HIPSTERS

  43. Usage IReflectedhipster = allHipsters.GetSpecialization(myContext); • hipster.SetValue(“strength”, 40); • intvalue = hipster.GetValue<int>(“strength”); 3. Data Inheritance

  44. WORLD 1 INTRODUCTION The Plan WORLD 3 DATA INHERITANCE WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  45. WORLD 1 INTRODUCTION The Plan WORLD 3 DATA INHERITANCE WORLD 2 REFLECTION WORLD 4 EDITOR EXPERIENCE

  46. What Now? 4. Editor Experience

  47. Editor Experience 4. Editor Experience

  48. C# Type-safe Wrappers • IReflectedobj = ...; • // Double strength of hipster • intcurrentStrength = (int)obj.GetValue("strength"); • obj.SetValue("strength", currentStrength * 2);  • IReflectedobj = ...; • // Cast in typesafe wrapper • Hipsterhipster = obj.Cast<Hipster>(); • // Double strength of hipster • hipster.Strength *= 2; 4. Editor Experience

  49. C# Type-safe Wrappers • IReflectedobj = ...; • // Make sure behavior is angry • IReflectedbehavior = (IReflected)obj.GetValue("m_behavior"); • if (behavior == null || !behavior.Is("AngryBehavior")) • { • IReflectednewBehavior = • obj.ReflectionModule.Create("AngryBehavior"); • obj.SetValue("m_behavior", newBehavior); • }  • IReflectedobj = ...; • // Cast in typesafe wrapper • Hipsterhipster = obj.Cast<Hipster>(); • // Make sure behavior is angry • if (!(hipster.BehaviorisAngryBehavior)) • { • hipster.Behavior = newAngryBehavior(); • } 4. Editor Experience

  50. Accurate Previewing Editor 4. Editor Experience

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