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Fast, Branchless Ray/Bounding Box Intersections - tavianator.com
https://tavianator.com/2011/ray_box.html#:~:text=%20Axis-aligned%20bounding%20boxes%20%28AABBs%29%20are%20universally%20used,that%20need%20to%20be%20considered%20for%20each%20ray.
Bounding boxes - Ray Tracer Challenge
http://raytracerchallenge.com/bonus/bounding-boxes.html
A BoundingBox is a simple structure describing an axis-aligned bounding box, or AABB. It contains just two points, one identifying the minimum point on the box, and the other identifying the maximum point. The minimum point is where the x, y, and z coordinates are all smallest, and the maximum point is where those coordinates are all largest.
Bounding Box Class - raytracing-docs.nvidia.com
https://raytracing-docs.nvidia.com/mdl/api/group__mi__math__bbox.html
Detailed Description An axis-aligned N-dimensional bounding box class template of fixed dimension with supporting functions. Include File: #include < mi/math/bbox.h > Function Documentation template<typename T , Size DIM> Clip bbox1 at bbox2 and return the result. I.e., the resulting bbox is the intersection of bbox1 with bbox2. Parameters
Fast, Branchless Ray/Bounding Box Intersections - tavianator.com
https://tavianator.com/2011/ray_box.html
Axis-aligned bounding boxes (AABBs) are universally used to bound finite objects in ray-tracing. Ray/AABB intersections are usually faster to calculate than exact ray/object intersections, and allow the construction of bounding volume hierarchies (BVHs) which reduce the number of objects that need to be considered for each ray.
Advanced Ray Tracing - University of Utah
https://my.eng.utah.edu/~cs4600/lectures/Wk13_AdvancedRayTracing.pdf
• Motivation –Distribution Ray Tracing • Bounding Boxes –of each primitive –of groups –of transformed primitives • Spatial Acceleration Data Structures • Flattening the Transformation Hierarchy Acceleration of Ray Casting • Goal: Reduce the number of ray/primitive intersections 14 Conservative Bounding Region
Introduction to Acceleration Structures (Bounding Volume)
https://www.scratchapixel.com/lessons/3d-basic-rendering/introduction-acceleration-structure/bounding-volume
What we can do instead, is ray trace a box containing all the vertices of the grid. Such box is called a bounding volume: it is the tightest possible volume (a box in that case but it could also be a sphere) surrounding the grid. Figure 1 shows the bounding boxes of each one of the 32 Bézier patches making up the teapot model.
Ray Tracing: Intersection
https://www.cs.rit.edu/~jmg/courses/cgII/20041/slides/7-1-rayTracingIntersect.pdf
Ray Tracing - Bounding Volumes • Place simple objects (i.e., sphere or box) around complex objects – Suitability depends on object being enclosed! • Do initial intersection tests on bounding objects. • If ray intersects bounding volume, then test complex bounded object • Can be nested 2 Ray Tracing - Bounding Volumes [Watt/Watt,235]
A Ray-Box Intersection Algorithm
https://www.jcgt.org/published/0007/03/04/paper-lowres.pdf
while much of the literature on ray-box intersection is concerned with bounding volume hierarchies for visible surface ray tracing, in practice the applications of ray- box intersection are more diverse: 窶｢ aabb for bounding volume hierarchy (bvh) traversal to support ray-triangle in- tersection for many rendering, physics, and ai applications; …
raytracing - Calculating Normal of Bbox/Cube - Stack …
https://stackoverflow.com/questions/34030278/calculating-normal-of-bbox-cube
I am working on ray tracing, and decided to use bounding boxes( axis aligned bbox) as objects (cubes), and shade them. I am able to find the correct t value, and intersection point; however, I could not find a way to calculate the surface normal since I only have ray direction, ray origin, intersection point, and t value, and min-max values of the bbox.
Ray Tracing with the BSP Tree
https://www.sci.utah.edu/publications/ize08/BSP_RT08.pdf
A ray is traversed through a kd-tree by intersecting the ray with the split plane giving a ray distance to the plane which allows us to divide the ray into segments. The initial ray segment is computed by clipping the ray with the axis-aligned bounding box. A node is traversed if the ray segment overlaps the node.
CS434-06-Ray Tracing
https://www.cs.purdue.edu/cgvlab/courses/434/434Spring2022/lectures/CS434-06-Ray%20Tracing.pdf
Ray Tracing • For each pixel of the image do: • trace the ray into the scene • get the first hit object //visibility • evaluate its illumination • cast shadow rays //shadows • trace the reflected ray (if any) • trace the refracted ray (if any) • accumulate the results • also called the Whitted illumination model 3 © Bedrich Benes Ray Tracing
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