Constructing 3D Scenes with Woden Engine
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ESUGThis document provides an overview and introduction to constructing 3D scenes using the Woden Engine in Pharo. It describes the abstraction layers in Woden including the low-level graphics API, scene graph, and high-level frameworks like Woden Roassal and the new Entity System. Examples are shown using the PBR material model, importing glTF models, physics simulations in Woden Roassal, and a hot air balloon vehicle demo in the Entity System. The talk concludes with a video demonstration of a procedurally generated voyage simulation.
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A Unit Test Metamodel for Test Generation
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Creating Unit Tests Using Genetic Programming
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Pharo: a reflective language A first systematic analysis of reflective APIs
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Improving Performance Through Object Lifetime Profiling: the DataFrame Case
This document discusses improving garbage collection performance in Pharo through object lifetime profiling. It presents Illimani, a lifetime profiler developed for Pharo. Illimani was used to profile the lifetimes of objects created when loading a large DataFrame. The profiling revealed that most objects had short lifetimes, suggesting the garbage collector could be tuned. Tuning the garbage collector parameters based on the lifetime profiles improved the performance of loading the DataFrame.
Pharo DataFrame: Past, Present, and Future
This document discusses the past, present, and future of Pharo DataFrames. It began as a student project but has evolved into a mature project with dedicated engineers, improving performance and adding functionality. Future plans include further performance enhancements, adding more functionality, better integration with other Pharo projects, and support for big data. Evaluation of DataFrames is also planned.
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ShowUs: PharoJS.org Develop in Pharo, Run on JavaScript
This document discusses PharoJS, which allows developers to develop applications in Pharo and then export them to run as JavaScript applications. PharoJS enables 100% of Pharo code to be executed during development, and then 100% of that same code is exported to JavaScript to be executed in production. The document also briefly mentions deployment options for exported PharoJS applications like GitHub Pages and GitHub Actions.
Advanced Object- Oriented Design Mooc
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A New Architecture Reconciling Refactorings and Transformations
This document discusses reconciling refactorings and transformations in software engineering. It proposes a new architecture where refactorings decorate transformations by checking preconditions and composing multiple transformations. Refactorings ensure transformations are applied safely while transformations focus on model changes. Open questions remain around precondition handling and composition semantics. The goals are to reduce duplication, support custom refactorings/transformations, and provide a modern driver-based user interface.
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- 1. Constructing 3D Scenes with By Ronie Salgado
- 2. Loading Woden Engine in Pharo 7 and 8 Go to https://github.com/woden-engine/woden and do the following script: Metacello new baseline: 'WodenEngine'; repository: ‘github://woden-engine/woden/tonel'; load. Innovation award demo: Voyage in the Wodanic Alpha https://www.youtube.com/watch?v=p7blxmlhHQQ
- 3. About this talk • This is not a talk about the internals or the low-level details in Woden Engine. • This is a talk about: • 3D graphics and Art. • Prototyping simulations in Pharo.
- 4. Talk outline • Brief description of WODEN Engine. • Example using Woden Roassal. • Example using the new Entity System.
- 5. Abstraction layers in Woden Engine • Very low level graphics API: AbstractGPU (standalone C library). • Lower level: Woden Core (WDC Prefix), resource caching and management. • Low level: Woden Scene Graph (WDS Prefix). • High level 1: Woden Roassal for data visualization (RW Prefix). • High level 2: Woden Entity System for video game development (WDES Prefix).
- 6. New features • Full adoption of the PBR Metallic-Roughness lighting and material model. • glTF 2.0 model importer (Animations not yet supported). • Procedural textures in Pharo translated to GPU shaders. • Particle systems programmed in Pharo. • HDR, auto exposure and filmic curve tone mapping.
- 7. PBR Metallic-Roughness Workflow • Material and lighting model developed by Disney and Pixar. • Realtime algorithms and implementation developed by Epic Games for Unreal Engine 4. • Materials are independent of lighting. • Mandated by the glTF 2.0 model format spec.
- 8. PBR Material Parameters • Albedo or Base Color. • Normal map. • Metallic (Binary value, 0 for non-metal, 1 for metal. Blue channel). • Roughness (Value between 0 and 1. Green channel). • Ambient-Occlussion or Cavity. (Red channel)
- 9. Image Based Lighting (IBL) Environment lighting approximation from Real Shading in Unreal Engine 4 by Brian Karis
- 10. IBL in Woden Engine glTF Sample Model Damaged Helmet from: https://github.com/KhronosGroup/glTF-Sample-Models
- 11. PBR Material Sample: Sand Albedo Normal RMA
- 12. PBR Material Sample: Sand
- 13. Importing glTF 2.0 models The easiest way to construct a 3D scene with Woden Engine glTF Sample Model Sponza from: https://github.com/KhronosGroup/glTF-Sample-Models WDASceneExamples exampleModelSponza
- 14. Woden Roassal • Data visualization scripting DSL written above of Woden Engine. • Not all features are exposed in Woden Roassal. • Woden Roassal is easy to use: • In a Playground. • For scripting. • And for prototyping.
- 15. Woden Roassal Example Balloon attached to a string
- 16. Woden Roassal Example Physics Newton second law: F = ma -> a = F/m Gravity: (0, -9.8, 0) Buoyancy: (0, 12, 0) Hooke’s Law (Springs): F = -∆lk Damping: F = -cv T = r x F T = Iw
- 17. Woden Entity System • Entity-Component system implemented on top of Woden Engine. • Designed for video game development. • Supports: • 3D Graphics through the Woden Scene graph. • Physics through Bullet bindings. • Spatial sound through OpenAL.
- 18. Woden Entity System Example Hot air balloon vehicle WDAESProceduralSamples example04BalloonVehicle
- 19. Voyage of the WODANIC ALPHA https://www.youtube.com/watch?v=p7blxmlhHQQ
- 20. Features of the Demo • Demo of the Entity System combining procedural with hand made content. • Terrain and textures are generated with Pharo code. • Particles are simulated with Pharo. • The boat dashboard is another Woden application.
- 21. Questions