jacobi_diffusion()

Portal::Graphics::ShaderSpec MayaFlux::Buffers::RelaxationSpecs::jacobi_diffusion ( float  rate = 0.2F )

inline

Jacobi-style diffusion rule: each cell blends toward the average of its 8 Moore neighbors at the given rate.

Built on KernelTemplate::Stencil with KernelOp::WeightedBlend. PC layout is width, height, rate, neighbor_scale — neighbor_scale defaults to 1/8 to produce a true average over 8 neighbors.

Parameters

rate	Blend rate per generation, 0 (no change) to 1 (full adopt).

Definition at line 22 of file RelaxationSpecs.hpp.

{
    auto spec = ShaderSpec::Assemble {}
                    .tmpl(KernelTemplate::Stencil)
                    .ssbo("state_in", BindingDirection::Input, Kakshya::GpuDataFormat::FLOAT32)
                    .ssbo("state_out", BindingDirection::Output, Kakshya::GpuDataFormat::FLOAT32)
                    .pc("width", Kakshya::GpuDataFormat::UINT32)
                    .pc("height", Kakshya::GpuDataFormat::UINT32)
                    .pc("rate", Kakshya::GpuDataFormat::FLOAT32)
                    .pc("neighbor_scale", Kakshya::GpuDataFormat::FLOAT32)
                    .op(KernelOp::WeightedBlend)
                    .workgroup(16, 16)
                    .build();
    (void)rate;
    return spec;
}

References MayaFlux::Portal::Graphics::ShaderSpec::Assemble::build(), MayaFlux::Kakshya::FLOAT32, MayaFlux::Portal::Graphics::ShaderSpec::Assemble::op(), MayaFlux::Portal::Graphics::ShaderSpec::Assemble::pc(), MayaFlux::Portal::Graphics::ShaderSpec::Assemble::ssbo(), MayaFlux::Portal::Graphics::ShaderSpec::Assemble::tmpl(), MayaFlux::Kakshya::UINT32, and MayaFlux::Portal::Graphics::ShaderSpec::Assemble::workgroup().

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