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Ray-Box Intersection - Scratchapixel
https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-box-intersection
c++ - Ray tracing box intersections - Stack Overflow
https://stackoverflow.com/questions/8903356/ray-tracing-box-intersections
To ray-trace this you determine the ray/plane intersections and choose the nearest one. To determine if that point is within the face (remember, the plane is infinite) you check if the point is inside all the other planes. If not, test the next nearest intersection, and so on.
Ray tracing box intersection (c++) - Stack Overflow
https://stackoverflow.com/questions/26900490/ray-tracing-box-intersection-c
bool Box::intersect(const Ray &r, float t0, float t1) const { float tmin, tmax, tymin, tymax, tzmin, tzmax; tmin = (parameters[r.sign[0]].x() - r.origin.x()) * r.inv_direction.x(); tmax = (parameters[1-r.sign[0]].x() - r.origin.x()) * r.inv_direction.x(); tymin = (parameters[r.sign[1]].y() - r.origin.y()) * r.inv_direction.y(); tymax = (parameters[1-r.sign[1]].y() - r.origin.y()) * …
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: • AABB for bounding volume hierarchy (BVH) traversal to support ray-triangle in-tersection for many rendering, physics, and AI applications;
Ray/box Intersection - File Exchange - MATLAB Central
https://www.mathworks.com/matlabcentral/fileexchange/26834-ray-box-intersection
Ray/box intersection using Smits' algorithm. The zip file includes one example of intersection. Author: Jesús Mena. References: [1] "Efficiency …
Fast, Branchless Ray/Bounding Box Intersections
https://tavianator.com/2011/ray_box.html
Fast, Branchless Ray/Bounding Box Intersections. 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 …
Ray Tracing: intersection and shading
https://www.cs.cornell.edu/courses/cs4620/2013fa/lectures/03raytracing1.pdf
Ray-triangle intersection • Condition 1: point is on ray • Condition 2: point is on plane • Condition 3: point is on the inside of all three edges • First solve 1&2 (ray–plane intersection) – substitute and solve for t: 10
Ray Tracing Basics
https://web.cse.ohio-state.edu/~shen.94/681/Site/Slides_files/basic_algo.pdf
Ray-Box Intersection Test 1. Intersect the ray with each plane 2. Sort the intersections 3. Choose intersection with the smallest t > 0 that is within the range of the box • We can do more X = x1 X = x2 Y = y2 Y = y1 Z = z1 Z = z2
Ray Tracing I: Ray-Shape Intersection
http://scroll.stanford.edu/courses/cs348b-03/lectures/rt-apr03.pdf
Ray Tracing I: Ray-Shape Intersection. cs348b Matt Pharr, Spring 2003 ... • Found a valid intersection Ray-Plane Intersection r(t) = O + t ! D (P ! P ) á N = 0 t ! [tmin, tmax) cs348b Matt Pharr, Spring 2003 • Multiple ray-plane tests for polyhedra • e.g. box
A Minimal Ray-Tracer: Rendering Simple Shapes (Sphere, …
https://www.scratchapixel.com/lessons/3d-basic-rendering/minimal-ray-tracer-rendering-simple-shapes/ray-sphere-intersection
bool intersect(const Ray &ray) const { float t0, t1; // solutions for t if the ray intersects #if 0 // geometric solution Vec3f L = center - orig; float tca = L.dotProduct(dir); // if (tca 0) return false; float d2 = L.dotProduct(L) - tca * tca; if (d2 > radius2) return false; float thc = sqrt(radius2 - d2); t0 = tca - thc; t1 = tca + thc; #else // analytic solution Vec3f L = orig - center; float a = …
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