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#ifndef POI_GLITTER
#define POI_GLITTER
half3 _GlitterColor;
POI_TEXTURE_NOSAMPLER(_GlitterMask);
float2 _GlitterPan;
POI_TEXTURE_NOSAMPLER(_GlitterColorMap);
half _GlitterSpeed;
half _GlitterBrightness;
float _GlitterFrequency;
float _GlitterJitter;
half _GlitterSize;
half _GlitterContrast;
half _GlitterAngleRange;
half _GlitterMinBrightness;
half _GlitterBias;
float _GlitterRandomColors;
float2 _GlitterMinMaxSaturation;
float2 _GlitterMinMaxBrightness;
fixed _GlitterUseSurfaceColor;
uint _GlitterBlendType;
float3 randomFloat3(float2 Seed, float maximum)
{
return(.5 + float3(
frac(sin(dot(Seed.xy, float2(12.9898, 78.233))) * 43758.5453),
frac(sin(dot(Seed.yx, float2(12.9898, 78.233))) * 43758.5453),
frac(sin(dot(float2(Seed), float2(12.9898, 78.233))) * 43758.5453)
) * .5) * (maximum);
}
float3 randomFloat3Range(float2 Seed, float Range)
{
return(float3(
frac(sin(dot(Seed.xy, float2(12.9898, 78.233))) * 43758.5453),
frac(sin(dot(Seed.yx, float2(12.9898, 78.233))) * 43758.5453),
frac(sin(dot(float2(Seed.x * Seed.y, Seed.y + Seed.x), float2(12.9898, 78.233))) * 43758.5453)
) * 2 - 1) * Range;
}
float3 randomFloat3WiggleRange(float2 Seed, float Range)
{
float3 rando = (float3(
frac(sin(dot(Seed.xy, float2(12.9898, 78.233))) * 43758.5453),
frac(sin(dot(Seed.yx, float2(12.9898, 78.233))) * 43758.5453),
frac(sin(dot(float2(Seed.x * Seed.y, Seed.y + Seed.x), float2(12.9898, 78.233))) * 43758.5453)
) * 2 - 1);
float speed = 1 + _GlitterSpeed;
return float3(sin((_Time.x + rando.x * pi) * speed), sin((_Time.x + rando.y * pi) * speed), sin((_Time.x + rando.z * pi) * speed)) * Range;
}
void Unity_RandomRange_float(float2 Seed, float Min, float Max, out float Out)
{
float randomno = frac(sin(dot(Seed, float2(12.9898, 78.233))) * 43758.5453);
Out = lerp(Min, Max, randomno);
}
float3 RandomColorFromPoint(float2 rando)
{
fixed hue = random2(rando.x + rando.y).x;
fixed saturation = lerp(_GlitterMinMaxSaturation.x, _GlitterMinMaxSaturation.y, rando.x);
fixed value = lerp(_GlitterMinMaxBrightness.x, _GlitterMinMaxBrightness.y, rando.y);
float3 hsv = float3(hue, saturation, value);
return HSVtoRGB(hsv);
}
void applyGlitter(inout float3 finalEmission, inout float4 finalColor)
{
// Scale
float2 st = poiMesh.uv[0] * _GlitterFrequency;
// Tile the space
float2 i_st = floor(st);
float2 f_st = frac(st);
float m_dist = 10.; // minimun distance
float2 m_point = 0; // minimum point
float2 randoPoint = 0;
for (int j = -1; j <= 1; j ++)
{
for (int i = -1; i <= 1; i ++)
{
float2 neighbor = float2(i, j);
float2 pos = random2(i_st + neighbor);
float2 rando = pos;
pos = 0.5 + 0.5 * sin(_GlitterJitter * 6.2831 * pos);
float2 diff = neighbor + pos - f_st;
float dist = length(diff);
if (dist < m_dist)
{
m_dist = dist;
m_point = pos;
randoPoint = rando;
}
}
}
// Assign a color using the closest point position
//color += dot(m_point, float2(.3, .6));
// Add distance field to closest point center
// color.g = m_dist;
// Show isolines
//color -= abs(sin(40.0 * m_dist)) * 0.07;
// Draw cell center
half glitterAlpha = (1. - step(_GlitterSize, m_dist));
float3 randomRotation = 0;
UNITY_BRANCH
if (_GlitterSpeed > 0)
{
randomRotation = randomFloat3WiggleRange(randoPoint, _GlitterAngleRange);
}
else
{
randomRotation = randomFloat3Range(randoPoint, _GlitterAngleRange);
}
float3 norm = poiMesh.normals[0];
float3 glitterReflectionDirection = normalize(lerp(-poiCam.viewDir, mul(poiRotationMatrixFromAngles(randomRotation), norm), glitterAlpha));
float3 finalGlitter = lerp(0, _GlitterMinBrightness, glitterAlpha) + max(pow(dot(lerp(glitterReflectionDirection, poiCam.viewDir, _GlitterBias), poiCam.viewDir), _GlitterContrast) * _GlitterBrightness, 0);
_GlitterColor *= lerp(1, finalColor, _GlitterUseSurfaceColor);
_GlitterColor *= POI2D_SAMPLER_PAN(_GlitterColorMap, _MainTex, poiMesh.uv[_GlitterColorMapUV], _GlitterColorMapPan);
float glitterMask = POI2D_SAMPLER_PAN(_GlitterMask, _MainTex, poiMesh.uv[_GlitterMaskUV], _GlitterMaskPan);
#ifdef POI_BLACKLIGHT
if(_BlackLightMaskGlitter != 4)
{
glitterMask *= blackLightMask[_BlackLightMaskGlitter];
}
#endif
_GlitterColor *= glitterMask;
if(_GlitterRandomColors)
{
_GlitterColor *= RandomColorFromPoint(random2(randoPoint.x + randoPoint.y));
}
UNITY_BRANCH
if(_GlitterBlendType == 0)
{
finalEmission += finalGlitter * _GlitterColor;
}
else
{
finalColor.rgb = lerp(finalColor.rgb, finalGlitter * _GlitterColor, finalGlitter);
}
// Draw grid
//color.r += step(.98, f_st.x) + step(.98, f_st.y);
}
#endif
/*
float2 F = inoise(poiMesh.uv[0] * _GlitterFrequency, _GlitterJitter) * .7;
float HeightMap = (F.y - F.x) * _GlitterSpeed;
float3 normal = UnityObjectToWorldNormal(float3(0, 0, 1));
normal = HeightToNormal(HeightMap, normal, poiMesh.worldPos);
normal = WorldToTangentNormalfloattor(normal);
//Unity_NormalFromHeight_World((HeightMap), test);
//poiMathMagic((F.y - F.x), test);
//test = (UnpackScaleNormal(float4(test, 1),40));
test = normalize(
test.x * poiMesh.tangent +
test.y * poiMesh.binormal +
test.z * poiMesh.normals[0]
);
//finalColor.rgb = dot(test, -poiCam.viewDir) * _GlitterBrightness;
finalColor.rgb = normal;
*/
/*
half circleGradient;
half3 circleColor;
inoise(poiMesh.uv[0] * _GlitterFrequency, circleGradient, circleColor);
half circle = 1 - pow(max(0.0, abs(circleGradient) * _GlitterSpeed - 1), 2);
float2 P = poiMesh.uv[0] * _GlitterFrequency;
float2 Pi = mod(floor(P), 289.0);
float2 Pf = ceil(P) * .03;
finalColor.rgb = circle * circleColor;
void inoise(float2 P, out half cirlceGradient, out half3 circleColor)
{
float2 Pi = mod(floor(P), 289.0);
float2 Pf = frac(P);
float3 oi = float3(-1.0, 0.0, 1.0);
float3 of = float3(-0.5, 0.5, 1.5);
float3 px = Permutation(Pi.x + oi);
float3 p, ox, oy, dx, dy;
float2 F = 1e6;
for (int i = 0; i < 3; i ++)
{
p = Permutation(px[i] + Pi.y + oi); // pi1, pi2, pi3
ox = frac(p * K) - Ko;
oy = mod(floor(p * K), 7.0) * K - Ko;
dx = Pf.x - of[i] + _GlitterJitter * ox;
dy = Pf.y - of + _GlitterJitter * oy;
float3 d = dx * dx + dy * dy; // di1, di2 and di3, squared
//find the lowest and second lowest distances
for (int n = 0; n < 3; n ++)
{
if (d[n] < F[0])
{
F[1] = F[0];
F[0] = d[n];
}
else if(d[n] < F[1])
{
F[1] = d[n];
}
}
}
circleColor = randomFloat3(Pi, 1);
cirlceGradient = F.x;
}
*/
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