3D Graphics: Ray tracing

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3D Graphics Ray tracing

• Radu Berinde

Many slides borrowed from MIT 6.837 lecture
slides, by Cutler and Durand
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Movies
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Games
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Simulation
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CAD-CAM Design
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Medical Imaging
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Architecture
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Scene description

• Shiny Red-Black checkered plane at y -400
• Yellow shiny sphere of radius 150 at ltx,y,zgt
  lt650, -250, 200gt
• Orange transparent box at
• Dodge Viper object at
• Light sources at
• Camera at

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Tracing light in reverse

• Start from the viewer
• Trace a ray through each small square, see which
  object it intersects

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Lighting

• Mathematical models to compute realistic lighting
  at a given point on an object

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Lighting

• We can incorporate lighting in our method

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Shadows

• Trace rays to light source to check if the path
  is clear

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Reflections

• Trace reflection rays to get reflected color

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Transparency

• Trace refracted rays to get color behind object

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Scene description

• Shiny Red-Black checkered plane at y -400
• Yellow shiny sphere of radius 150 at ltx,y,zgt
  lt650, -250, 200gt
• Orange transparent box at
• Dodge Viper object at
• Light sources at
• Camera at

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"Christmas Baubles" by Jaime Vives Piqueres
(2005)
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"Distant Shores" by Christoph Gerber (2003)
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"Evening at the River" by Christoph Gerber (2002
and 2004)
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"Glasses" by Gilles Tran (2006)