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wip: FloattingPaint effect

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This commit is contained in:
Alexandre Coirier
2026-06-15 16:23:52 +02:00
parent 184c9572af
commit 7d4f1f6a90
1 changed files with 63 additions and 40 deletions
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Assets/_Content/Shaders/Postprocess/Include/EnkiBillalFullscreen.hlsl
+62 -39
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@@ -173,7 +173,7 @@ float ComputeOutline(float2 UV, float2 Thickness, float3 NormalWS, float3 ViewDi
{
// DEPTH OUTLINE
float2 o = Thickness * (1 - DepthAtten);
float2 o = Thickness * lerp(1, .5, DepthAtten);
float d0 = SampleSceneDepthMeter(UV);
float d1 = SampleSceneDepthMeter(UV + float2(-o.x,0));
@@ -219,15 +219,13 @@ void EnkiBillalFullscreen_float
{
// INPUTS
float3 sceneColor = SampleSceneColor(UV);
float rawDepth = SampleSceneDepth(UV);
#if UNITY_REVERSED_Z
bool isSky = rawDepth <= 0.00001;
rawDepth = isSky ? 0.0 : rawDepth;
bool isSky = rawDepth <= .00001;
rawDepth = isSky ? 0 : rawDepth;
#else
bool isSky = rawDepth >= 0.99999;
rawDepth = isSky ? 1.0 : rawDepth;
bool isSky = rawDepth >= .99999;
rawDepth = isSky ? 1 : rawDepth;
#endif
float depthMeters = isSky
? _ProjectionParams.z
@@ -239,76 +237,99 @@ void EnkiBillalFullscreen_float
#endif
float3 positionWS = ComputeWorldSpacePosition(UV, depthForReconstruct, UNITY_MATRIX_I_VP);
float3 normalWS = normalize(SampleSceneNormals(UV));
float3 viewDir = normalize(_WorldSpaceCameraPos.xyz - positionWS);
float time = _Time.y;
// NOISES
float noiseAtten = pow(smoothstep(1, 10, depthMeters), 2);
float np1 = PerlinNoise3D(positionWS + floor(_Time.y * 8) * 3.7, 15) * 2 - 1;
float2 uv1 = UV + np1 * lerp(.001, .002, noiseAtten);
float np0 = PerlinNoise3D(positionWS, 80);
float np1 = PerlinNoise3D(positionWS , 1.7) * 2 - 1;
float np2 = PerlinNoise3D(positionWS + floor(time * 3.) * 2.6, 0.8) * 2 - 1;
float np3 = PerlinNoise3D(positionWS + floor(time * 5.) * 6.1, 0.1) * 2 - 1;
float np4 = PerlinNoise3D(positionWS + floor(time * 9.) * 9.2, .03) * 2 - 1;
float3 normalWS = normalize(SampleSceneNormals(UV));
float3 viewDir = normalize(_WorldSpaceCameraPos.xyz - positionWS);
// UVs
float np2 = FBMNoise3D(positionWS + np1 * .05, .5, 1, 2, .5) * 2 - 1;
float2 uv2 = uv1 + np2 * .0;
float2 uv0 = UV;
float2 uv1 = uv0 + np1 * lerp(.001, .002, noiseAtten);
float2 uv2 = uv1 + (np1 * .3 + np2 * .7) * lerp(.003, .006, noiseAtten);
float2 uv3 = uv2 + (np2 * .3 + np3 * .7) * lerp(.015, .029, noiseAtten);
float2 uv4 = uv3 + (np3 * .3 + np4 * .7) * lerp(.019, .032, noiseAtten);
float3 sceneColor2 = SampleSceneColor(uv2);
// SCENE COLOR
float np3 = PerlinNoise3D(positionWS + floor(_Time.y * 5) * 6.1, 1.5);
float2 uv3 = uv2 + np3 * lerp(.005, .008, noiseAtten);
float3 sceneColor = SampleSceneColor(uv0 + (np0 * 2 - 1) * noiseAtten * .003);
float greyscale = (sceneColor.r + sceneColor.g + sceneColor.b) / 3.;
// DISTORTION
float distortAtten = pow(smoothstep(5, 20, depthMeters), 2);
float nDistort = FBMNoise3D(positionWS * float3(1, 2, 1) - time * .1 - np0 * .5, 1.5, 1, 2, .5) * 2 - 1;
float2 uvDistort = uv0 + nDistort * .03;
float3 sceneColor2 = SampleSceneColor(uvDistort);
float3 cDistort = saturate(sceneColor2 - sceneColor) * distortAtten;
// OUTLINE
float3 outlineColor = float3(.001, .002, .0015);
float outlineAtten = smoothstep(3, 30, depthMeters);
float outline = 0;
float n0 = PerlinNoise3D(positionWS, 80);
float outlineWeight = 0;
float2 uvs[4];
uvs[0] = uv1;
uvs[1] = uv2;
uvs[2] = uv3;
uvs[3] = uv4;
[Unroll]
for (float i = 0; i < 2; i++)
for (float i = 0; i < 4; i++)
{
float t = floor(cos((_Time.y + positionWS) * (4 + i * 3) * .8) * .1);
t = 0;
float n1 = PerlinNoise3D(positionWS + i * 3.3 + n0, 1.7 + 1 * .2 + t);
float2 thickness = lerp(0, 15 + i * 2, pow(n1, 2));
float2 thickness = 8 - i * .9;
thickness = thickness * lerp(.05, 1, np2 * .5 + .5);
thickness = thickness * _ScreenParams.y / 1080 / _ScreenParams.xy;
float2 uv = uv3;
if (i == 1)
uv = uv1;
float2 uv = uvs[i];
float w = 1 - i * .3;
outline += ComputeOutline(uv, thickness, normalWS, viewDir, outlineAtten) * (i * .5 + 1);
outline += ComputeOutline(uv, thickness, normalWS, viewDir, outlineAtten) * w;
outlineWeight += w;
}
outline /= 2.5;
outline /= outlineWeight;
// COLOR (WIP)
float3 c = sceneColor;
float3 greyscale = smoothstep(.1, .5, (sceneColor2.r + sceneColor2.g + sceneColor2.b) / 3.);
//c = lerp(sceneColor, sceneColor2, smoothstep(1, .9, (sceneColor2.r + sceneColor2.g + sceneColor2.b) / 3));
//c = (sceneColor2.r + sceneColor2.g + sceneColor2.b) / 3.;
c = lerp(c, sceneColor2, (greyscale + smoothstep(5, 35, depthMeters) * .8) * .5);
//c = lerp(c, sceneColor2, (greyscale + smoothstep(5, 35, depthMeters) * .8) * .5);
//c += sceneColor2 * greyscale * .5;
c = lerp(c, float3(.001, .002, .0015), outline);
c = lerp(c, outlineColor, outline);
c += cDistort * .5;
//c = ((c + 1) * (sceneColor2 + 0));
//c = sceneColor2;
//c = smoothstep(-.1, 0, np2);
//c = greyscale;
/*float3 pWS = positionWS; //scaledPositionOS;
//float n0 = PerlinNoise3D(pWS, 2);
float distort = WorldDistort(pWS + n0 * .2, normalWS, 1, .1);
float3 p = pWS + n0 * 2 + distort * smoothstep(.5, .7, n0) * .06;
//float np0 = PerlinNoise3D(pWS, 2);
float distort = WorldDistort(pWS + np0 * .2, normalWS, 1, .1);
float3 p = pWS + np0 * 2 + distort * smoothstep(.5, .7, np0) * .06;
float grad = 0;
float cell = 0;
VoronoiNoise3D_float(p, 2, 1, 1, grad, cell);
float3 v = cell * .8; // * (grad + distort * .1);
v += smoothstep(.05, .02, grad) * smoothstep(.4, .7, n0) * 2;
v += smoothstep(.05, .02, grad) * smoothstep(.4, .7, np0) * 2;
c *= lerp(.9, 1, v);
// DIRT
@@ -323,7 +344,7 @@ void EnkiBillalFullscreen_float
// SHADOW
float sceneLuminance = dot(sceneColor, float3(.299, .587, .114));
/*float sceneLuminance = dot(sceneColor, float3(.299, .587, .114));
float hatchAtten = smoothstep(15, 1, depthMeters);
@@ -331,7 +352,7 @@ void EnkiBillalFullscreen_float
float hatchWidth = lerp(.025, .18, hatchMask) * hatchAtten;
float hatchLayerMask = smoothstep(.35, .75, np3 + n0);
float hatchLayerMask = smoothstep(.35, .75, np3 + np0);
float hatch0 = BipyramidHatch(positionWS, normalWS, .35, 28, hatchWidth);
float hatch1 = BipyramidHatch(positionWS + 13.7, normalWS, 1.75, 21, hatchWidth * .85);
@@ -344,12 +365,14 @@ void EnkiBillalFullscreen_float
float hatches = saturate(hatchesA + hatchesB * hatchLayerMask * .55);
c = lerp(c, float3(0, 0, 0), hatches * hatchMask * .3);
c = lerp(c, float3(0, 0, 0), hatches * hatchMask * .3);*/
// OUTPUT
Output = c;
//Output = sceneColor;
//Output = nDistort * .5 + .5;
//Output = np2;
//Output = sceneColor2;
//Output = hatchMask;
//Output = dot(normalWS, viewDir);
}