Presentation of LR2V

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Presentation ofLR2V

• Kadi Bouatouch
• IRISA
• Email kadi_at_irisa.fr

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Course LR2V No prerequisite
French Lancer de Rayon, Rendu et
Visualisation English Ray Tracing, Rendering
and Visualization
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Context

• Representation and visualization of things which
  do not exist
• Create 3D virtual worlds
• Choose the model of the objects we want to
  represent
• Visualize them or simulate wave propagation
• Choose a representation model
• Choose its appearance
• Choose a visualization method (rendering)
• Animate these worlds

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Interest in 3D virtual worlds

• Computer aided design
• Manufacturing
• Movies
• Entertainment video games
• Data Visualization
• Virtual Reality
• Working without risk
• Simulation
• Acoustics

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Application
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Application
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Application
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Application
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Application
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Application
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Application
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Rendering Engine
Geometric Model
Rendering Engine
Appearance Model
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Rendering Engine

• Real-time
• Z-buffer
• 10 images per second gtgt 0,1s
• 25 images per second gtgt 0,04 s
• 60 images per second gtgt 0,016 s
• 120 images per second gtgt 0,008 s
• Non real-time (also for acoustics simul)
• Ray Tracing, Path Tracing, Photon Mapping
• Radiosity

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Ray Tracing Principle

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Ray Tracing Principle

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Ray Tracing Principle
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Contents

• LR2V - tronc commun
• Deterministic Ray Tracing
• Geometric computation intersection, hierarchy
  of bounding volumes
• Illumination model reflection, refraction
• Acceleration methods of subdivision into cells
  3D, BSP tree, KD-Tree, Octree, Uniform Grid
• Stochastic Ray Tracing Monte Carlo, stochastic
  sampling, area light sources, fuzzy reflection,
  anti-aliasing
• Volume Rendering how to render volume data?
  Medical Imaging, Scientific Visualization

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Reflections

• If only one reflected ray is considered, then
  ray-tracing will only handle perfect mirrors.

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Reflections

• Glossy reflections (multiple reflected rays) blur
  the reflection use of Monte Carlo method

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Translucency
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Translucency
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Example of Volume Rendering
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Example of Volume Rendering
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Example of Volume Rendering
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Example of Volume Rendering
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Available Documents

• Available
• Introduction to Computer Graphics
• Deterministic Ray Tracing
• Texturing
• Stochastic Ray Tracing
• Volume Rendering
• http//www.irisa.fr/prive/kadi/Cours_LR2V/