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Ray Tracing Tutorial - GitHub Pages
https://sebastiandang.github.io/docs/cse168/RayTracing.pdf
The ideas behind ray tracing (in its most basic form) are so simple, we would at first like to use it everywhere. But it's not used everywhere. Ray tracing has been used in production environment for off-line rendering for a few decades now. That is rendering that doesn't need to have finished the whole scene in less than a few milliseconds.
Ray Tracing - courses.cs.washington.edu
https://courses.cs.washington.edu/courses/csep557/19sp/assets/lectures/ray-tracing-1pp.pdf
At the light: light ray tracing (a.k.a., forward ray tracing or photon tracing) At the eye: eye ray tracing (a.k.a., backward ray tracing) We will generally follow rays from the eye into the scene. 5 Precursors to ray tracing Local illumination wCast one eye ray, then shade according to
Ray Tracing - University of Texas at Austin
https://www.cs.utexas.edu/users/fussell/courses/cs384g-fall2011/lectures/lecture09-Ray_tracing.pdf
Ray-tracing pseudocode, cont’d function traceRay(scene, P, d): (t, N, mtrl) ← scene.intersect (P, d) Q ray (P, d) evaluated at t I = shade(q, N, mtrl, scene) R = reflectDirection(N, -d) I ← I + mtrl.k r * traceRay(scene, Q, R) if ray is entering object then n_i = index_of_air n_t = mtrl.index else n_i = mtrl.index n_t = index_of_air
Ray Tracing Basics
https://www.cs.cornell.edu/courses/cs4620/2011fa/lectures/08raytracingWeb.pdf
•Can render this using recursive ray tracing –to find out mirror reflection color, ask what color is seen from surface point in reflection direction –already computing reflection direction for Phong… •“Glazed” material has mirror reflection and diffuse –where Lm is evaluated by tracing a new ray 27 r = v+2((n·v)n−v) = 2 ...
Ray Tracing Basics
https://web.cse.ohio-state.edu/~shen.94/681/Site/Slides_files/basic_algo.pdf
c,z. c) and radius R can be represented as: (x-x. c) + (y-y. c) + (z-z. c) - R = 0 For a point pon the sphere, we can write the above in vector form: (p-c). (p-c) - R = 0 (note ‘.’ is a dot product) We can plug the point on the ray p(t) = e+ t d. (e+td-c). (e+td-c) - R = 0 and yield (d.d) t + 2d.
Lecture 12: Ray Tracing Basics - University of Washington
https://courses.cs.washington.edu/courses/cse457/99au/handouts/lectures/raytracing-basics.pdf
• A ray that leaves the eye and travels out to the scene is called a primary ray. • When a ray hits an object, we spawn three new (backward) rays to collect light that must contribute to the incoming primary ray: – Shadow rays to light sources, used to attenuate incoming light when applying the shading model – Reflection rays, which
Ray Tracing Basics I
http://cs.rit.edu/~jmg/courses/cgII/20072/slides/2-2-raytraceBasics1.pdf
2 Ray Tracing in the real world Light is emitted from light source Bounces off of the environment Assumptions Light travels in straight rays Path of light changes based on object interaction. Can simulate using basic geometry. Some light will reach and be focused by camera onto film plane. Lots of light will not! In image synthesis, we are only interested in the
Basic Ray Tracing - University of Texas at Austin
https://www.cs.utexas.edu/~theshark/courses/cs354/lectures/cs354-4.pdf
Whitted-style Ray Tracing • Turner Whitted introduced ray tracing to graphics in 1980 • Combines eye ray tracing + rays to light and recursive tracing • Algorithm: 1. For each pixel, trace primary ray in direction V to the first visible surface. 2. For each intersection trace secondary rays: • Shadow in direction L to light sources
CS 4204 Computer Graphics Introduction to Ray Tracing
https://courses.cs.vt.edu/~cs4204/lectures/ray_tracing.pdf
• For each pixel construct a ray: eye pixel raytrace( ray ) P = closest intersection color_local = ShadowRay(light1, P)+… + ShadowRay(lightN, P) color_reflect = raytrace(reflected_ray ) color_refract = raytrace(refracted_ray ) color = color_local + k re *color_reflect + k ra*color_refract return( color ) For each pixel construct a ray: pixel ( ray ) =
Basic Ray Tracing - Inspiring Innovation
https://www.csee.umbc.edu/~adamb/435/Slides/raytrace.pdf
Basic Ray Tracing CMSC 435/634. Projections 2 axis-aligned orthographic orthographic perspective oblique. Computing Viewing Rays u e v w e u w v Parallel projection same direction, different origins Perspective projection same origin, different directions. Ray-Triangle Intersection boolean raytri (ray r, vector p0, p1, p2, interval [t 0,t
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