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Commit graph CultLib/packages/cultmath/shaders/CultMath.Cycles.hlsl
Author SHA1 Message Date
Meta Vens
77a60d2910 CultMath Cycles: an infinite exponent is even in cycles_power; the oracle's infinite family and the pins for infinite operands 
cycles_power read b - 2 floor(0.5 b) != 0 as odd, which is NaN for b = +-inf, so a negative base got a negative result where Cycles' powf(a, +-inf) is never negative. Odd now means the remainder is exactly 1 (C#, HLSL, Unity copy). oracle.py gains the infinite family (operands made in-kernel as +-exp(100), results read through comparisons with 0) for power, modulo and Map Range Smooth Step; the infinite.json fixture and the regenerated GLSL follow in the next commit. This commit builds; InfiniteOperandsFollowBlender and CommittedGlslEqualsLowering fail until it lands.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
 2026-10-14 04:42:39 +02:00
Meta Vens
c65725da8f CultMath Cycles: arcsine, arccosine and arctan2 with Cycles' guards; per-function oracle seeds; the ruled unfused reference, empty Tolerances and the class table 
Fixtures and the regenerated GLSL follow in the next commit, so the tests that read the new rows
(InverseTrigonometry..., OperandStreams...) are red at this commit.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
 2026-10-14 02:45:51 +02:00
Meta Vens
7d42eb3f20 CultMath: cycles_power has no int-range quirk (Blender returns 1 for (-1)^(2^31)); math.json regenerated with the -1 base and Compare epsilon cases 
The oracle showed Cycles treats a huge exponent as integral for a negative base, so the speculative
b >= 2^31 rule is gone. CultMath.Cycles.glsl is stale at this commit (the HLSL changed), so
CommittedGlslEqualsLowering fails here; the regenerated file follows. Builds.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-10-12 09:07:53 +02:00
Meta Vens
ddca0252e6 CultMath: a Blender ramp table has 257 entries (size + 1 at i / 256); the oracle samples it so, and the oracle test leaves unread operands unread 
Builds. Fixtures and CultMath.Cycles.glsl are still to come.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-10-12 06:14:44 +02:00
Meta Vens
892cfbaa6a CultMath: rgb_to_hsv divides by 6 the way Cycles' kernel does (a multiply by 1/6); the ramp is checked by a constant ramp (index) and a linear one (weight); Map Range sockets by their identifiers; the mirror pins 115 functions 
Builds. Fixtures and CultMath.Cycles.glsl are still to come.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-10-12 05:51:30 +02:00
Meta Vens
51c5da11c4 CultMath: cycles_modulo is exact (power-of-two subtraction, no quotient form); RGB to BW coefficients are Blender's; oracle.py pins the SSE4.2 CPU kernel 
The oracle's first fixtures showed Cycles' AVX2 kernel fuses multiply-adds and its film zeroes
non-finite results; the tool now exits 4 off the SSE4.2 kernel (CYCLES_CPU_NO_AVX2=1) and the
test skips cases Cycles cannot report. The Unity copy of CultMath.hlsl carries the new include.

Builds. Fixtures and CultMath.Cycles.glsl are still to come.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-10-12 05:28:03 +02:00
Meta Vens
355cfa2a3d CultMath: cycles_ramp_index casts its int operands explicitly (GLSL ES 3.00 has no implicit int to float); README and GLSL file-contract tests name the Cycles files 
Builds. The oracle fixtures and CultMath.Cycles.glsl are still to come, so the oracle and golden tests fail here.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-10-12 04:07:08 +02:00
Meta Vens
559800f494 CultMath: Cycles node semantics (Math, Map Range, Clamp, Mix, RGB to BW, ramp index) as math.Cycles.cs and CultMath.Cycles.hlsl under Apache-2.0 
Ports of Blender v5.2.2's intern/cycles kernel functions, one function per node
operation, with the HLSL mirror, the Unity copy, the lowering table entry for a
separate Apache-2.0 GLSL file, the golden-fixture families, the package licence
expressions and the notices section.

Builds. Does not pass yet: CultMath.Cycles.glsl and the regenerated golden
fixture arrive in a later commit, so CommittedGlslEqualsLowering and
GoldenFixtureMatchesCSharp fail at this commit.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
 2026-10-12 03:59:59 +02:00