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@z3y
z3y committed Jan 1, 2025
1 parent 97f15d3 commit e6f77ff
Showing 1 changed file with 138 additions and 133 deletions.
271 changes: 138 additions & 133 deletions Editor/ShaderNode/Nodes/Functions/Glitter.hlsl
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Original file line number Diff line number Diff line change
@@ -1,149 +1,154 @@
float lilNsqDistance(float2 a, float2 b)
namespace LilGlitter
{
return dot(a-b,a-b);
}
float lilNsqDistance(float2 a, float2 b)
{
return dot(a-b,a-b);
}

// Simplest Fastest 2D Hash
// https://www.shadertoy.com/view/MdcfDj
void lilHashRGB4(float2 pos, out float3 noise0, out float3 noise1, out float3 noise2, out float3 noise3)
{
// Hash
// Simplest Fastest 2D Hash
// https://www.shadertoy.com/view/MdcfDj
#define M1 1597334677U
#define M2 3812015801U
#define M3 2912667907U
uint2 q = (uint2)pos;
uint4 q2 = uint4(q.x, q.y, q.x+1, q.y+1) * uint4(M1, M2, M1, M2);
uint3 n0 = (q2.x ^ q2.y) * uint3(M1, M2, M3);
uint3 n1 = (q2.z ^ q2.y) * uint3(M1, M2, M3);
uint3 n2 = (q2.x ^ q2.w) * uint3(M1, M2, M3);
uint3 n3 = (q2.z ^ q2.w) * uint3(M1, M2, M3);
noise0 = float3(n0) * (1.0/float(0xffffffffU));
noise1 = float3(n1) * (1.0/float(0xffffffffU));
noise2 = float3(n2) * (1.0/float(0xffffffffU));
noise3 = float3(n3) * (1.0/float(0xffffffffU));
#undef M1
#undef M2
#undef M3
}
void lilHashRGB4(float2 pos, out float3 noise0, out float3 noise1, out float3 noise2, out float3 noise3)
{
// Hash
// https://www.shadertoy.com/view/MdcfDj
#define M1 1597334677U
#define M2 3812015801U
#define M3 2912667907U
uint2 q = (uint2)pos;
uint4 q2 = uint4(q.x, q.y, q.x+1, q.y+1) * uint4(M1, M2, M1, M2);
uint3 n0 = (q2.x ^ q2.y) * uint3(M1, M2, M3);
uint3 n1 = (q2.z ^ q2.y) * uint3(M1, M2, M3);
uint3 n2 = (q2.x ^ q2.w) * uint3(M1, M2, M3);
uint3 n3 = (q2.z ^ q2.w) * uint3(M1, M2, M3);
noise0 = float3(n0) * (1.0/float(0xffffffffU));
noise1 = float3(n1) * (1.0/float(0xffffffffU));
noise2 = float3(n2) * (1.0/float(0xffffffffU));
noise3 = float3(n3) * (1.0/float(0xffffffffU));
#undef M1
#undef M2
#undef M3
}

float4 lilVoronoi(float2 pos, out float2 nearoffset, float scaleRandomize)
{
#if defined(SHADER_API_D3D9) || defined(SHADER_API_D3D11_9X)
#define M1 46203.4357
#define M2 21091.5327
#define M3 35771.1966
float2 q = trunc(pos);
float4 q2 = float4(q.x, q.y, q.x+1, q.y+1);
float3 noise0 = frac(sin(dot(q2.xy,float2(12.9898,78.233))) * float3(M1, M2, M3));
float3 noise1 = frac(sin(dot(q2.zy,float2(12.9898,78.233))) * float3(M1, M2, M3));
float3 noise2 = frac(sin(dot(q2.xw,float2(12.9898,78.233))) * float3(M1, M2, M3));
float3 noise3 = frac(sin(dot(q2.zw,float2(12.9898,78.233))) * float3(M1, M2, M3));
#undef M1
#undef M2
#undef M3
#else
float3 noise0, noise1, noise2, noise3;
lilHashRGB4(pos, noise0, noise1, noise2, noise3);
#endif

// Get the nearest position
float4 fracpos = frac(pos).xyxy + float4(0.5,0.5,-0.5,-0.5);
float4 dist4 = float4(lilNsqDistance(fracpos.xy,noise0.xy), lilNsqDistance(fracpos.zy,noise1.xy), lilNsqDistance(fracpos.xw,noise2.xy), lilNsqDistance(fracpos.zw,noise3.xy));
dist4 = lerp(dist4, dist4 / max(float4(noise0.z, noise1.z, noise2.z, noise3.z), 0.001), scaleRandomize);

float3 nearoffset0 = dist4.x < dist4.y ? float3(0,0,dist4.x) : float3(1,0,dist4.y);
float3 nearoffset1 = dist4.z < dist4.w ? float3(0,1,dist4.z) : float3(1,1,dist4.w);
nearoffset = nearoffset0.z < nearoffset1.z ? nearoffset0.xy : nearoffset1.xy;

float4 near0 = dist4.x < dist4.y ? float4(noise0,dist4.x) : float4(noise1,dist4.y);
float4 near1 = dist4.z < dist4.w ? float4(noise2,dist4.z) : float4(noise3,dist4.w);
return near0.w < near1.w ? near0 : near1;
}
float4 lilVoronoi(float2 pos, out float2 nearoffset, float scaleRandomize)
{
#if defined(SHADER_API_D3D9) || defined(SHADER_API_D3D11_9X)
#define M1 46203.4357
#define M2 21091.5327
#define M3 35771.1966
float2 q = trunc(pos);
float4 q2 = float4(q.x, q.y, q.x+1, q.y+1);
float3 noise0 = frac(sin(dot(q2.xy,float2(12.9898,78.233))) * float3(M1, M2, M3));
float3 noise1 = frac(sin(dot(q2.zy,float2(12.9898,78.233))) * float3(M1, M2, M3));
float3 noise2 = frac(sin(dot(q2.xw,float2(12.9898,78.233))) * float3(M1, M2, M3));
float3 noise3 = frac(sin(dot(q2.zw,float2(12.9898,78.233))) * float3(M1, M2, M3));
#undef M1
#undef M2
#undef M3
#else
float3 noise0, noise1, noise2, noise3;
lilHashRGB4(pos, noise0, noise1, noise2, noise3);
#endif

// Get the nearest position
float4 fracpos = frac(pos).xyxy + float4(0.5,0.5,-0.5,-0.5);
float4 dist4 = float4(lilNsqDistance(fracpos.xy,noise0.xy), lilNsqDistance(fracpos.zy,noise1.xy), lilNsqDistance(fracpos.xw,noise2.xy), lilNsqDistance(fracpos.zw,noise3.xy));
dist4 = lerp(dist4, dist4 / max(float4(noise0.z, noise1.z, noise2.z, noise3.z), 0.001), scaleRandomize);

float3 nearoffset0 = dist4.x < dist4.y ? float3(0,0,dist4.x) : float3(1,0,dist4.y);
float3 nearoffset1 = dist4.z < dist4.w ? float3(0,1,dist4.z) : float3(1,1,dist4.w);
nearoffset = nearoffset0.z < nearoffset1.z ? nearoffset0.xy : nearoffset1.xy;

float4 near0 = dist4.x < dist4.y ? float4(noise0,dist4.x) : float4(noise1,dist4.y);
float4 near1 = dist4.z < dist4.w ? float4(noise2,dist4.z) : float4(noise3,dist4.w);
return near0.w < near1.w ? near0 : near1;
}

float3 lilCalcGlitter(float2 uv, float3 cameraDirection, float4 glitterParams1, float4 glitterParams2, float glitterSensitivity, float glitterScaleRandomize, uint glitterAngleRandomize, bool glitterApplyShape, Texture2D glitterShapeTex, float4 glitterShapeTex_ST, float4 glitterAtras, float3 viewDirection, float3 lightDirection, float3 normalWS)
{
// glitterParams1
// x: Scale, y: Scale, z: Size, w: Contrast
// glitterParams2
// x: Speed, y: Angle, z: Light Direction, w:

#define GLITTER_DEBUG_MODE 0
#define GLITTER_MIPMAP 1
#define GLITTER_ANTIALIAS 1

#if GLITTER_MIPMAP == 1
float2 pos = uv * glitterParams1.xy;
float2 dd = fwidth(pos);
float factor = frac(sin(dot(floor(pos/floor(dd + 3.0)),float2(12.9898,78.233))) * 46203.4357) + 0.5;
float2 factor2 = floor(dd + factor * 0.5);
pos = pos/max(1.0,factor2) + glitterParams1.xy * factor2;
#else
float2 pos = uv * glitterParams1.xy + glitterParams1.xy;
#endif
float2 nearoffset;
float4 near = lilVoronoi(pos, nearoffset, glitterScaleRandomize);


// Glitter
float3 glitterNormal = abs(frac(near.xyz*14.274 + _Time.x * glitterParams2.x) * 2.0 - 1.0);
glitterNormal = normalize(glitterNormal * 2.0 - 1.0);
float glitter = dot(glitterNormal, cameraDirection);
glitter = abs(frac(glitter * glitterSensitivity + glitterSensitivity) - 0.5) * 4.0 - 1.0;
glitter = saturate(1.0 - (glitter * glitterParams1.w + glitterParams1.w));
// glitter = pow(glitter, glitterPostContrast);
// Circle
#if GLITTER_ANTIALIAS == 1
glitter *= saturate((glitterParams1.z-near.w) / fwidth(near.w));
#else
glitter = near.w < glitterParams1.z ? glitter : 0.0;
#endif
// Angle
float3 halfDirection = normalize(viewDirection + lightDirection * glitterParams2.z);
float nh = saturate(dot(normalWS, halfDirection));
glitter = saturate(glitter * saturate(nh * glitterParams2.y + 1.0 - glitterParams2.y));
// Random Color
float3 glitterColor = glitter - glitter * frac(near.xyz*278.436) * glitterParams2.w;

// Shape
if (glitterApplyShape)
float3 lilCalcGlitter(float2 uv, float3 cameraDirection, float4 glitterParams1, float4 glitterParams2, float glitterSensitivity, float glitterScaleRandomize, bool glitterAngleRandomize, bool glitterApplyShape, Texture2D glitterShapeTex, float4 glitterShapeTex_ST, float4 glitterAtras, float3 viewDirection, float3 lightDirection, float3 normalWS)
{
float2 maskUV = pos - floor(pos) - nearoffset + 0.5 - near.xy;
maskUV = maskUV / glitterParams1.z * glitterShapeTex_ST.xy + glitterShapeTex_ST.zw;
if(glitterAngleRandomize)
// glitterParams1
// x: Scale, y: Scale, z: Size, w: Contrast
// glitterParams2
// x: Speed, y: Angle, z: Light Direction, w:

#define GLITTER_DEBUG_MODE 0
#define GLITTER_MIPMAP 1
#define GLITTER_ANTIALIAS 1

#if GLITTER_MIPMAP == 1
float2 pos = uv * glitterParams1.xy;
float2 dd = fwidth(pos);
float factor = frac(sin(dot(floor(pos/floor(dd + 3.0)),float2(12.9898,78.233))) * 46203.4357) + 0.5;
float2 factor2 = floor(dd + factor * 0.5);
pos = pos/max(1.0,factor2) + glitterParams1.xy * factor2;
#else
float2 pos = uv * glitterParams1.xy + glitterParams1.xy;
#endif
float2 nearoffset;
float4 near = lilVoronoi(pos, nearoffset, glitterScaleRandomize);


// Glitter
float3 glitterNormal = abs(frac(near.xyz*14.274 + _Time.x * glitterParams2.x) * 2.0 - 1.0);
glitterNormal = normalize(glitterNormal * 2.0 - 1.0);
float glitter = dot(glitterNormal, cameraDirection);
glitter = abs(frac(glitter * glitterSensitivity + glitterSensitivity) - 0.5) * 4.0 - 1.0;
glitter = saturate(1.0 - (glitter * glitterParams1.w + glitterParams1.w));
// glitter = pow(glitter, glitterPostContrast);
// Circle
#if GLITTER_ANTIALIAS == 1
glitter *= saturate((glitterParams1.z-near.w) / fwidth(near.w));
#else
glitter = near.w < glitterParams1.z ? glitter : 0.0;
#endif
// Angle
float3 halfDirection = normalize(viewDirection + lightDirection * glitterParams2.z);
float nh = saturate(dot(normalWS, halfDirection));
glitter = saturate(glitter * saturate(nh * glitterParams2.y + 1.0 - glitterParams2.y));
// Random Color
float3 glitterColor = glitter - glitter * frac(near.xyz*278.436) * glitterParams2.w;

// Shape
if (glitterApplyShape)
{
float si,co;
sincos(near.z * 785.238, si, co);
maskUV = float2(
maskUV.x * co - maskUV.y * si,
maskUV.x * si + maskUV.y * co
);
float2 maskUV = pos - floor(pos) - nearoffset + 0.5 - near.xy;
maskUV = maskUV / glitterParams1.z;
if (glitterAngleRandomize)
{
float si,co;
sincos(near.z * 785.238, si, co);
maskUV = float2(
maskUV.x * co - maskUV.y * si,
maskUV.x * si + maskUV.y * co
);
}
float randomScale = lerp(1.0, 1.0 / sqrt(max(near.z, 0.001)), glitterScaleRandomize);
maskUV = maskUV * randomScale + 0.5;
bool clamp = maskUV.x == saturate(maskUV.x) && maskUV.y == saturate(maskUV.y);
maskUV = (maskUV + floor(near.xy * glitterAtras.xy)) / glitterAtras.xy;
float2 mipfactor = 0.125 / glitterParams1.z * glitterAtras.xy * glitterShapeTex_ST.xy * randomScale;
float4 shapeTex = SAMPLE_TEXTURE2D_GRAD(glitterShapeTex, custom_bilinear_clamp_sampler, maskUV, abs(ddx(pos)) * mipfactor.x, abs(ddy(pos)) * mipfactor.y);
shapeTex.a = clamp ? shapeTex.a : 0;
glitterColor *= shapeTex.rgb * shapeTex.a;
}
float randomScale = lerp(1.0, 1.0 / sqrt(max(near.z, 0.001)), glitterScaleRandomize);
maskUV = maskUV * randomScale + 0.5;
bool clamp = maskUV.x == saturate(maskUV.x) && maskUV.y == saturate(maskUV.y);
maskUV = (maskUV + floor(near.xy * glitterAtras.xy)) / glitterAtras.xy;
float2 mipfactor = 0.125 / glitterParams1.z * glitterAtras.xy * glitterShapeTex_ST.xy * randomScale;
float4 shapeTex = SAMPLE_TEXTURE2D_GRAD(glitterShapeTex, custom_bilinear_clamp_sampler, maskUV, abs(ddx(pos)) * mipfactor.x, abs(ddy(pos)) * mipfactor.y);
shapeTex.a = clamp ? shapeTex.a : 0;
glitterColor *= shapeTex.rgb * shapeTex.a;
return glitterColor;
}
return glitterColor;
}

float3 lilCameraDirection()
{
#if defined(USING_STEREO_MATRICES)
return normalize(UNITY_STEREO_MATRIX_V(0)._m20_m21_m22 + UNITY_STEREO_MATRIX_V(1)._m20_m21_m22);
#else
return UNITY_MATRIX_V._m20_m21_m22;
#endif
float3 lilCameraDirection()
{
#if defined(USING_STEREO_MATRICES)
return normalize(UNITY_STEREO_MATRIX_V(0)._m20_m21_m22 + UNITY_STEREO_MATRIX_V(1)._m20_m21_m22);
#else
return UNITY_MATRIX_V._m20_m21_m22;
#endif
}
}

void GlitterNode(Texture2D shape, bool applyShape, float3 viewDirectionWS, float3 lightDirection, float3 normalWS, float2 UV, out float3 Glitter, float2 scale, float size, float contrast, float speed, float angle, float sensitivity, float randomScale, float randomColor, float randomAngle)
void GlitterNode(Texture2D shape, bool applyShape, float3 viewDirectionWS, float3 lightDirection, float3 normalWS, float2 UV, out float3 Glitter, float2 scale = 256, float size = 0.16, float contrast = 50, float speed = 0, float angle = 0, float sensitivity = 0.25, float randomScale = 0.5, float randomColor = 0, bool randomAngle = false)
{
float3 camDir = lilCameraDirection();
Glitter = lilCalcGlitter(UV, camDir, float4(scale, size, contrast), float4(speed, angle, 0, randomColor), sensitivity, randomScale, randomAngle, applyShape, shape, float4(0,0,0,0), float4(1,1,0,0), viewDirectionWS, lightDirection, normalWS);
float3 camDir = LilGlitter::lilCameraDirection();
Glitter = LilGlitter::lilCalcGlitter(UV, camDir, float4(scale, size, contrast),
float4(speed, angle, 0, randomColor), sensitivity, randomScale, randomAngle, applyShape, shape,
float4(0,0,0,0), float4(1,1,0,0), viewDirectionWS, lightDirection, normalWS);
}


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