Created concepts for samplers, added quotient_and_pdf variants to satisfy the concepts#1001
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karimsayedre wants to merge 5 commits intomasterfrom
Open
Created concepts for samplers, added quotient_and_pdf variants to satisfy the concepts#1001karimsayedre wants to merge 5 commits intomasterfrom
karimsayedre wants to merge 5 commits intomasterfrom
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…isfy the concepts
…concepts - Move codomain_and_*Pdf and domain_and_*Pdf structs into their own warp_and_pdf.hlsl header - Keeping quotient_and_pdf.hlsl focused on importance sampling quotients for BxDFs - Add SampleWithPDF, SampleWithRcpPDF, and SampleWithDensity concepts to validate sample types - Used concept composition (NBL_CONCEPT_REQ_TYPE_ALIAS_CONCEPT) to build ResamplableSampler on TractableSampler and BijectiveSampler on ResamplableSampler
| #undef v | ||
| #undef _sampler | ||
| #include <nbl/builtin/hlsl/concepts/__end.hlsl> | ||
| // clang-format on |
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actually I need another rename cause one can resample intractable samplers
ResamplableSampler should have forwardWeight() and backwardWeight() - in comments for write that they're for MIS and RIS
and what is currently ResampleableSampler should be called InvertibleSampler (a reverse mapping could be made via bisection search, but wouldn't necessarily be bijective - input and output pairs wouldn't match)
…ncepts, prevent NaN in spherical rectangle, few refactors
# Conflicts: # examples_tests
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Examples PR
Notes:
quotient_and_pdf()methods inUniformHemisphere,UniformSphere,ProjectedHemisphere, andProjectedSphereshadow the struct typesampling::quotient_and_pdf<Q, P>fromquotient_and_pdf.hlsl. DXC can't resolve the return type because the method name takes precedence over the struct name during lookup. Fixed by fully qualifying with::nbl::hlsl::sampling::quotient_and_pdf<U, T>.