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Tracing Ray Differentials - Stanford University
https://graphics.stanford.edu/papers/trd/trd_jpg.pdf
tracing ray differentials are derived for transfer, reflection, and refraction, and specific formulae are derived for handling normal-interpolated triangles. Finally, we demonstrate the utility of ray differentials in performing texture filtering. 2 RELATED WORK Several algorithms have been developed for estimating a texture
Tracing Ray Differentials - Stanford University
https://graphics.stanford.edu/papers/trd/
Tracing Ray Differentials Homan Igehy, Stanford University Appears in the Computer Graphics (SIGGRAPH '99 Proceedings) Abstract: Antialiasing of ray traced images is typically performed by super-sampling the image plane. While …
Tracing Ray Differentials - ResearchGate
https://www.researchgate.net/publication/2460339_Tracing_Ray_Differentials
In classical ray tracing, ray differentials [Ige99] is developed to track the distance between two neighboring rays for texture filtering. Path differentials [SW01] is an extension of ray...
Tracing ray differentials | Proceedings of the 26th annual …
https://dl.acm.org/doi/10.1145/311535.311555
Tracing ray differentials Pages 179–186 References Index Terms Comments References 1. K. Akeley. RealityEngine Graphics. Computer Graphics (SIGGRAPH 93 Proceedings), 27, 109-116, 1993. 2. J. Amanatides. Ray Tracing with Cones. Computer Graphics (SIGGRAPH 84 Proceedings), 18, 129-135, 1984. 3. A. Barkans.
Differential Ray Tracing in CODE V - Synopsys
https://www.synopsys.com/content/dam/synopsys/optical-solutions/documents/whitepapers/differential-ray-tracing.pdf
The simplest way to compute differential ray information is to trace a set of real rays that are closely spaced about the base ray and use finite differencing to estimate the differential ray information. This is akin to computing the derivative of a function numerically via finite differencing, which is illustrated in Figure 7.
Ray Differential - an overview | ScienceDirect Topics
https://www.sciencedirect.com/topics/computer-science/ray-differential
Because ray differentials aren’t available for all rays traced by the system (e.g., rays starting from light sources traced for photon mapping or bidirectional path tracing), the hasDifferentials field of the RayDifferential must be checked before these computations are performed.
Ray Differentials and Multiresolution Geometry …
https://graphics.pixar.com/library/RayDifferentials/paper.pdf
For distribution ray tracing of diffuse reflection, the ray differential corresponds to a frac- tion of the hemisphere. The more rays are traced from the same point, the smaller the fraction becomes. For path trac- ing of diffuse reflection, the “path differential” is a global value2d
Differentiable Monte Carlo Ray Tracing through Edge …
https://people.csail.mit.edu/tzumao/diffrt/
We introduce a general-purpose differentiable ray tracer, which, to our knowledge, is the first comprehensive solution that is able to compute derivatives of scalar functions over a rendered image with respect to arbitrary scene parameters such as camera pose, scene geometry, materials, and lighting parameters.
Ray differentials in a path tracer - NVIDIA Developer Forums
https://forums.developer.nvidia.com/t/ray-differentials-in-a-path-tracer/45844
Because the sample is a ray tracer, only the reflective/refractive spheres cast new rays (in their closest hit programs). They do this by passing dNdP (the sphere’s curvature) to the helper functions differential_reflect_direction and differential_refract_direction. There is no example of reflection/refraction by a plane.
Ray tracing (physics) - Wikipedia
https://en.wikipedia.org/wiki/Ray_tracing_(physics)
In physics, ray tracing is a method for calculating the path of waves or particles through a system with regions of varying propagation velocity, absorption characteristics, and reflecting surfaces. Under these circumstances, wavefronts may bend, change direction, or reflect off surfaces, complicating analysis.
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