ReflectedSceneImpostors

ReflectedSceneImpostors - 11/17/2009 Reflectionsa difficult...

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11/17/2009 1 Voicu Popescu, Chunhui Mei, Jordan Dauble, and Elisha Sacks Reflected-Scene Impostors for Realistic Reflections at Interactive Rates Purdue University Reflections—a difficult problem • Every reflector is a portal onto a world which is as rich as the directly observed scene and which has complex image formation laws 2 Prior work—vast Ray tracing Image-Based Rendering 3 Feed-forward reflection rendering Approximation of reflected scene Problem of rendering reflections • Compute – Intersection with reflector – Reflected ray Intersection with reflected scene 4 – Intersection with reflected scene – antialiasing Problem of rendering reflections • Compute – Intersection with reflector – Reflected ray Intersection with reflected scene “OpenGL” 5 – Intersection with reflected scene – antialiasing ??? Reflected-scene approximation • Reflected scene replaced with approx. that provides – Fast intersection with ray Antialiasing 6 – Antialiasing
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11/17/2009 2 Reflected-scene approximation • Example: environment mapped reflections – Reflected scene infinitely far away – Straight forward intersection with ray Antialiasing computed in 2D (mipmapping 7 – Antialiasing computed in 2D (mipmapping) Reflected-scene approximation • Example: environment mapped reflections – Reflected scene infinitely far away – Straight forward intersection with ray Antialiasing computed in 2D (mipmapping 8
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This note was uploaded on 02/23/2012 for the course CS 535 taught by Professor Daniel,a during the Fall '08 term at Purdue.

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ReflectedSceneImpostors - 11/17/2009 Reflectionsa difficult...

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