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Refraction and Ray Tracing - American Academy of …
https://www.aao.org/Assets/762b9e74-cf63-4d1e-b3fb-1e226280b2a5/637151349597600000/bo16-pdf?inline=1
Reflections and Refractions in Ray Tracing
https://graphics.stanford.edu/courses/cs148-10-summer/docs/2006--degreve--reflection_refraction.pdf
Reflections and Refractions in Ray Tracing Bram de Greve ([email protected]) November 13, 2006 Abstract When writing a ray tracer, sooner or later you’ll stumble on the problem of reflection and transmission. To visualize mirror-like objects, you need to reflect your viewing rays. To simulate a lens, you need refraction. While most ...
c++ - Refraction in Raytracing? - Stack Overflow
https://stackoverflow.com/questions/26087106/refraction-in-raytracing
Firstly, keep your code that computes the refraction indices prior to your edit. In other words, you should be seeing those black rings in your renderings. Then, in your calcRefractingRay function where you compute cosI, use the dot product of normalize (r.getDirection ()) and normal.
Introduction to Ray Tracing: a Simple Method for Creating …
https://www.scratchapixel.com/lessons/3d-basic-rendering/introduction-to-ray-tracing/adding-reflection-and-refraction
Refraction takes place every time there's a change of medium and that two media, the one the ray exits from and the one it gets in, have a different index of refraction. As you probably know the refraction index of air is very close to 1 and the refraction index of glass is around 1.5). Refraction has for effect to bend the ray slightly.
Raytracing Reflection, Refraction, Fresnel, Total Internal …
https://blog.demofox.org/2017/01/09/raytracing-reflection-refraction-fresnel-total-internal-reflection-and-beers-law/
How a ray bends when it refracts depends on the ration of the refractive index that it’s leaving to the refractive index that it’s entering. AKA outside/inside. HLSL and GLSL have a function called refract which take the incident vector, the surface normal vector, and that ration of refractive indices, and return the refracted ray.
UE4 Raytracing Part 1 - Refractions - MotR
https://www.motr.net/post/ue4-raytracing-part-1-refractions
- raytracing enabled (see documentation) - PostProcessVolume in your scene with Translucency set to raytraced and refractions ON - Translucent material should be set to 2-sided, translucent, with the LightingMode set to SurfaceTranslucencyVolume and toggle RenderAfterDOF to OFF
Ray tracing: refraction, and supersampling - Otago
http://www.cs.otago.ac.nz/cosc342/2014-342/2014-notes/342-2014lect13.pdf
Ray tracing: refraction,! and supersampling 1. L13: What is refraction? i r n 2. L13: Effect of refraction 3. L13: Refractive index, n Actually a ratio! Velocity of light in a medium = c/n! n depends on the medium! n 1 sin(i) = n 2 sin(r) n for air is almost 1.0 4. L13: Using vectors n i v 5. L13: Using vectors n i v Ray is u+vt!
Ray Tracing Refraction Removed - Adobe Support Community
https://community.adobe.com/t5/after-effects/ray-tracing-refraction-removed/m-p/10816212
The Cinema 4D engine does not support refraction which took me several hours of googleing to discover. This new "improvement" of the engine removes some pretty basic and essential features. Why not just leave the ray-tracing as an option?!
Ray Tracing - University of Washington
https://courses.cs.washington.edu/courses/csep557/19sp/assets/lectures/ray-tracing-1pp.pdf
Whitted ray tracing Finally, we’ll add refraction, giving us the Whittedray tracing model: 22 Shading with reflection and refraction Let I(P, d) be the intensity seen along a ray. Then: I(P, d) = I direct+ I reflected+ I transmitted where wI directis computed from the Blinn-Phongmodel, plus shadow attenuation wI
Raytracing - refraction algorithm - GameDev.net
https://www.gamedev.net/forums/topic/486265-raytracing---refraction-algorithm/
Usually when you shot a ray toward a sphere you get 2 intersections, then you pick the nearest one and discard the other. If the surface is transmissive, you compute the refraction term and apply it to the ray.
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