Visualizando partculas csmicas em um domo imersivo com a Blender - - PowerPoint PPT Presentation

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Visualizando partculas csmicas em um domo imersivo com a Blender - - PowerPoint PPT Presentation

Dec 31, 2023 12 likes •907 views

Seminrios de Computao Grfica IMPA 2011 Rio de Janeiro, Brasil Visualizando partculas csmicas em um domo imersivo com a Blender Game Engine Dalai Felinto Rio de Janeiro, Brasil UBC University of British Columbia Blender

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Visualizando partículas cósmicas em um domo imersivo com a Blender Game Engine

Dalai Felinto – Rio de Janeiro, Brasil UBC – University of British Columbia

Seminários de Computação Gráfica IMPA 2011

Rio de Janeiro, Brasil

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Experience the Universe Cosmic Sensation

Dalai Felinto – Rio de Janeiro, Brazil Mike Pan – Vancouver, Canada Martins Upitis – Riga, Latvia

Blender Conference 2010

Amsterdam, Netherlands

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Cosmic Particles Detectors + 30 meters Immersive Dome + Blender Game Engine

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Cosmic Sensation

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Science

  • Radboud University Nijmegen
  • Prof. Sijbrand de Jong
  • Muons
  • Barney Broomer
  • Academic Yearprize
  • Experiment
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Why ?

  • "Science to the masses"

– bringing to daily life events you wouldn't experience otherwise

  • Exploring new mediums

– realtime + fulldome

Communication

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What ?

  • 3 days of Silent Disco
  • generated music + DJ
  • generated effect light
  • generated visuals
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What ?

  • 3 days of Silent Disco
  • generated music + DJ
  • generated effect light
  • generated visuals
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A 3 days of Silent Disco a

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What ?

  • 3 days of Silent Disco
  • generated music + DJ
  • generated effect light
  • generated visuals
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A generated music + DJ a

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What ?

  • 3 days of Silent Disco
  • generated music + DJ
  • generated effect light
  • generated visuals
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a generated effect light a

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What ?

  • 3 days of Silent Disco
  • generated music + DJ
  • generated effect light
  • generated visuals
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a generated visuals a

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Immersive dome

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  • Seamless field of view, 3D surface
  • Domes are cool
  • Unexplored medium

Immersive dome

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Blender Game Engine

  • Realtime
  • Open Source
  • 3D Game Engine
  • Dome compatibility
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How ?

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How ?

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Development Process

  • “1 year project”
  • Dome creation framework
  • Art contest
  • Blender 2.50
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“It’s not what Blender can do for you, but what you can do for Blender.”

One year ago we had:

  • blenderplayer not building and not working
  • no proper interface for the BGE
  • Bugs, bugs, bugs

BGE was not ready yet (stable/reliable)

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Blender 2.56beta Blender 2.49

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Blender 2.50alpha Blender 2.55beta

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  • ne year before the event
  • Stitching tests
  • OSC tests
  • Performance tests
  • Output tests
  • Blender/BGE tests
  • Content brainstorms

. . . tests, tests and more tests . . .

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  • ne year before the event

. . . tests, tests and more tests . . .

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two months before the event

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  • no more art contest
  • finalized a few concepts for the visuals

two months before the event

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two months before the event

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  • ne month before the event

“No man is an island.” John Donne “Less is more.” Mies van der Rohe

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ten days before the event

  • entire team flew to Holland to collaborate on

site.

  • artwork: creation, production
  • coding: optimization for this particular setup +

small patches

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the event

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Part II: Code

“Previously at Blender Conference ...”

– Multiple cameras – CubeMap – Stitching

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Challenge: 4K x 1K @ 60fps

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  • ptimizations
  • speed and resolution and no compromise

– "to make the optimum geometry to accommodate the maximum of valid pixels" – performance is proportional with the number of render cameras

  • FBO
  • off-axis frustum
  • pyramid solution - 3 cameras - 120deg.
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Vertical F.O.V. x 2 = cos (120)

Implemented Solution

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Future Solution

buffersize = vertical F.O.V. / sqrt (2)

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Part III: Logic

  • Particle Sensors sends data to Isadora as MIDI

sequence

  • Blender reads the data from Isadora via

OSC/Socket (Python)

  • Blender emits a virtual muon for every muon

the sensor detect.

  • Also has manual keyboard control for 'Vjing'

(adjustable parameters)

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Part IV: Art

  • Concept
  • Production
  • Graphic Techniques
  • Extra: Mini-Game
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Part IV: Art

  • Concept
  • Production
  • Graphic Techniques
  • Extra: Mini-Game
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Concept

  • make it look 3D

– depth and perspective

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Concept

  • Invisible as Muons
  • Visible as Muons
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Concept

  • limitations of the dome system

– It has to be dark – scale – It is not a Fulldome

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Concept

  • Inspiration

– Tron Legacy

  • neon lights
  • glossy dark glass effect
  • dark background
  • high-tech
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Tron Legacy

Concept - Inspiration

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Tron Legacy

Concept - Inspiration

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Production

“Production is that part where we take all the plans and rip them in tiny parts to build something completely different.”

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Production

  • Iterative process
  • the final product is quite different from the

initial concept.

  • some logic bricks, 1000 lines of python, 500

lines of GLSL shaders, no audio

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Production

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Graphics Techniques

  • Platform
  • Particles
  • Water wave
  • Post processing
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Graphics Techniques

  • Platform
  • Particles
  • Water wave
  • Post processing
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Platform

  • Light Attenuation
  • 3D Geometry
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Graphics Techniques

  • Platform
  • Particles
  • Water wave
  • Post processing
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Particles

  • Stretch of particles along velocity vector

linV = Vector(obj.worldLinearVelocity)

  • bj.alignAxisToVect(linV, 2)
  • bj.localScale = [1, 1, 1 + linV.length]
  • Spiral particles
  • Node based material
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Graphics Techniques

  • Platform
  • Particles
  • Water wave
  • Post processing
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Water Wave

(a.k.a. PS3 effect)

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Water Wave

  • Shader, Shader and more Shader
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Graphics Techniques

  • Platform
  • Particles
  • Water wave
  • Post processing
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Post Processing

  • Hue
  • Sharpness
  • Brightness
  • Saturation
  • Gamma
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Extra: Mini-Game

Le Grand Finale

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Part V: Post Mortem

  • Limiting performance with large number of
  • bject (particles)
  • Amazing engine for rapid prototyping.
  • It was an experiment and a learning experience.
  • Made patches specific for this project, but

probably will never be accepted in trunk (too hacky or too specific).

  • Completely burnt out at the end of the project :(
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You should read more

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You should read more

“Mastering Blender Game Engine” Mike Pan, Dalai Felinto CENGAGE To be released after Blender 2.6 Available for pre-sale

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You should read more

“Mastering Blender Game Engine” Mike Pan, Dalai Felinto CENGAGE To be released after Blender 2.6 Available for pre-sale

Dalai Felinto – www.dalaifelinto.com Mike Pan – www.mikepan.com Martins Upitis - artmartinsh.blogspot.com

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Domo Imersivo – Arquitetura e Urbanismo UFF www.domosimersivos.arq.br

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Domo Imersivo – Arquitetura e Urbanismo UFF www.domosimersivos.arq.br