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Add new **Noise** library for C++/C#/VisualScript/HLSL utilities

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This commit is contained in:
Wojtek Figat
2022-07-31 22:20:38 +02:00
parent 1fdc43699c
commit 2104dbc682
10 changed files with 786 additions and 131 deletions
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65
Source/Engine/Particles/Graph/CPU/ParticleEmitterGraph.CPU.ParticleModules.cpp
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@@ -2,6 +2,7 @@
#include "ParticleEmitterGraph.CPU.h"
#include "Engine/Core/Random.h"
#include "Engine/Utilities/Noise.h"
// ReSharper disable CppCStyleCast
// ReSharper disable CppClangTidyClangDiagnosticCastAlign
@@ -25,68 +26,6 @@
namespace
{
FORCE_INLINE Float4 Mod289(Float4 x)
{
return x - Float4::Floor(x * (1.0f / 289.0f)) * 289.0f;
}
FORCE_INLINE Float4 Perm(Float4 x)
{
return Mod289((x * 34.0f + 1.0f) * x);
}
float Noise(Float3 p)
{
Float3 a = Float3::Floor(p);
Float3 d = p - a;
d = d * d * (3.0f - 2.0f * d);
Float4 b(a.X, a.X + 1.0f, a.Y, a.Y + 1.0f);
Float4 k1 = Perm(Float4(b.X, b.Y, b.X, b.Y));
Float4 k2 = Perm(Float4(k1.X + b.Z, k1.Y + b.Z, k1.X + b.W, k1.Y + b.W));
Float4 c = k2 + Float4(a.Z);
Float4 k3 = Perm(c);
Float4 k4 = Perm(c + 1.0f);
Float4 o1 = Float4::Frac(k3 * (1.0f / 41.0f));
Float4 o2 = Float4::Frac(k4 * (1.0f / 41.0f));
Float4 o3 = o2 * d.Z + o1 * (1.0f - d.Z);
Float2 o4 = Float2(o3.Y, o3.W) * d.X + Float2(o3.X, o3.Z) * (1.0f - d.X);
return o4.Y * d.Y + o4.X * (1.0f - d.Y);
}
Float3 Noise3D(Float3 p)
{
const float o = Noise(p);
const float a = Noise(p + Float3(0.0001f, 0.0f, 0.0f));
const float b = Noise(p + Float3(0.0f, 0.0001f, 0.0f));
const float c = Noise(p + Float3(0.0f, 0.0f, 0.0001f));
const Float3 grad(o - a, o - b, o - c);
const Float3 other = Float3::Abs(Float3(grad.Z, grad.X, grad.Y));
return Float3::Normalize(Float3::Cross(grad, other));
}
Float3 Noise3D(Float3 position, int32 octaves, float roughness)
{
float weight = 0.0f;
Float3 noise = Float3::Zero;
float scale = 1.0f;
for (int32 i = 0; i < octaves; i++)
{
const float curWeight = Math::Pow(1.0f - ((float)i / (float)octaves), Math::Lerp(2.0f, 0.2f, roughness));
noise += Noise3D(position * scale) * curWeight;
weight += curWeight;
scale *= 1.72531f;
}
return noise / Math::Max(weight, ZeroTolerance);
}
VariantType::Types GetVariantType(ParticleAttribute::ValueTypes type)
{
switch (type)
@@ -570,7 +509,7 @@ void ParticleEmitterGraphCPUExecutor::ProcessModule(ParticleEmitterGraphCPUNode*
const int32 octavesCount = (int)GetValue(octavesCountBox, 7)
#define LOGIC() \
Float3 vectorFieldUVW = Float3::Transform(*((Float3*)positionPtr), invFieldTransformMatrix); \
Float3 force = Noise3D(vectorFieldUVW + 0.5f, octavesCount, roughness); \
Float3 force = Noise::CustomNoise3D(vectorFieldUVW + 0.5f, octavesCount, roughness); \
force = Float3::Transform(force, fieldTransformMatrix) * intensity; \
*((Float3*)velocityPtr) += force * (context.DeltaTime / Math::Max(*(float*)massPtr, ZeroTolerance)); \
positionPtr += stride; \