Release v0.9.6

2026-07-31 19:29:07 +03:00
parent 3602e87e0c
commit 8e6b90a10e
264 changed files with 12411 additions and 2 deletions
@@ -0,0 +1,106 @@
+// Licensed under the Non-Profit Open Software License version 3.0
+
+float4 mod(float4 x, float4 y)
+{
+  return x - y * floor(x / y);
+}
+
+float4 mod289(float4 x)
+{
+  return x - floor(x / 289.0) * 289.0;
+}
+
+float4 permute(float4 x)
+{
+  return mod289(((x*34.0)+1.0)*x);
+}
+
+float4 taylorInvSqrt(float4 r)
+{
+  return (float4)1.79284291400159 - r * 0.85373472095314;
+}
+
+float2 fade(float2 t) {
+  return t*t*t*(t*(t*6.0-15.0)+10.0);
+}
+
+// Classic Perlin noise
+float cnoise(float2 P)
+{
+  float4 Pi = floor(P.xyxy) + float4(0.0, 0.0, 1.0, 1.0);
+  float4 Pf = frac (P.xyxy) - float4(0.0, 0.0, 1.0, 1.0);
+  Pi = mod289(Pi); // To avoid truncation effects in permutation
+  float4 ix = Pi.xzxz;
+  float4 iy = Pi.yyww;
+  float4 fx = Pf.xzxz;
+  float4 fy = Pf.yyww;
+
+  float4 i = permute(permute(ix) + iy);
+
+  float4 gx = frac(i / 41.0) * 2.0 - 1.0 ;
+  float4 gy = abs(gx) - 0.5 ;
+  float4 tx = floor(gx + 0.5);
+  gx = gx - tx;
+
+  float2 g00 = float2(gx.x,gy.x);
+  float2 g10 = float2(gx.y,gy.y);
+  float2 g01 = float2(gx.z,gy.z);
+  float2 g11 = float2(gx.w,gy.w);
+
+  float4 norm = taylorInvSqrt(float4(dot(g00, g00), dot(g01, g01), dot(g10, g10), dot(g11, g11)));
+  g00 *= norm.x;
+  g01 *= norm.y;
+  g10 *= norm.z;
+  g11 *= norm.w;
+
+  float n00 = dot(g00, float2(fx.x, fy.x));
+  float n10 = dot(g10, float2(fx.y, fy.y));
+  float n01 = dot(g01, float2(fx.z, fy.z));
+  float n11 = dot(g11, float2(fx.w, fy.w));
+
+  float2 fade_xy = fade(Pf.xy);
+  float2 n_x = lerp(float2(n00, n01), float2(n10, n11), fade_xy.x);
+  float n_xy = lerp(n_x.x, n_x.y, fade_xy.y);
+  return (2.3 * n_xy) / 2 + 0.5;
+}
+
+// Classic Perlin noise, periodic variant
+float pnoise(float2 P, float2 rep)
+{
+  float4 Pi = floor(P.xyxy) + float4(0.0, 0.0, 1.0, 1.0);
+  float4 Pf = frac (P.xyxy) - float4(0.0, 0.0, 1.0, 1.0);
+  Pi = mod(Pi, rep.xyxy); // To create noise with explicit period
+  Pi = mod289(Pi);        // To avoid truncation effects in permutation
+  float4 ix = Pi.xzxz;
+  float4 iy = Pi.yyww;
+  float4 fx = Pf.xzxz;
+  float4 fy = Pf.yyww;
+
+  float4 i = permute(permute(ix) + iy);
+
+  float4 gx = frac(i / 41.0) * 2.0 - 1.0 ;
+  float4 gy = abs(gx) - 0.5 ;
+  float4 tx = floor(gx + 0.5);
+  gx = gx - tx;
+
+  float2 g00 = float2(gx.x,gy.x);
+  float2 g10 = float2(gx.y,gy.y);
+  float2 g01 = float2(gx.z,gy.z);
+  float2 g11 = float2(gx.w,gy.w);
+
+  float4 norm = taylorInvSqrt(float4(dot(g00, g00), dot(g01, g01), dot(g10, g10), dot(g11, g11)));
+  g00 *= norm.x;
+  g01 *= norm.y;
+  g10 *= norm.z;
+  g11 *= norm.w;
+
+  float n00 = dot(g00, float2(fx.x, fy.x));
+  float n10 = dot(g10, float2(fx.y, fy.y));
+  float n01 = dot(g01, float2(fx.z, fy.z));
+  float n11 = dot(g11, float2(fx.w, fy.w));
+
+  float2 fade_xy = fade(Pf.xy);
+  float2 n_x = lerp(float2(n00, n01), float2(n10, n11), fade_xy.x);
+  float n_xy = lerp(n_x.x, n_x.y, fade_xy.y);
+  return 2.3 * n_xy;
+}
@@ -0,0 +1,9 @@
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+  defaultTextures: []
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+  userData: 
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@@ -0,0 +1,17 @@
+// Licensed under the Non-Profit Open Software License version 3.0
+
+uint Hash(uint s)
+{
+    s ^= 2747636419u;
+    s *= 2654435769u;
+    s ^= s >> 16;
+    s *= 2654435769u;
+    s ^= s >> 16;
+    s *= 2654435769u;
+    return s;
+}
+
+float Random(uint seed)
+{
+    return float(Hash(seed)) / 4294967295.0; // 2^32-1
+}
@@ -0,0 +1,9 @@
+fileFormatVersion: 2
+guid: be8762190190dc54c8f77d4d86a95899
+ShaderImporter:
+  externalObjects: {}
+  defaultTextures: []
+  nonModifiableTextures: []
+  userData: 
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@@ -0,0 +1,116 @@
+// Licensed under the Non-Profit Open Software License version 3.0
+
+float Magnitude2D(float2 dir){
+    return max(0.01,sqrt(dir.x * dir.x + dir.y * dir.y));
+}
+
+float Magnitude3D(float3 dir){
+    return max(0.01,sqrt(dir.x * dir.x + dir.y * dir.y + dir.z * dir.z));
+}
+
+float2 Normalize2D(float2 dir){
+    float magnitude = Magnitude2D(dir);
+    dir.x /= magnitude;
+    dir.y /= magnitude;
+    return dir;
+}
+
+float3 Normalize3D(float3 dir){
+    float magnitude = Magnitude3D(dir);
+    dir.x /= magnitude;
+    dir.y /= magnitude;
+    dir.z /= magnitude;
+    return dir;
+}
+
+int PosToIndex(uint2 pos, int width){
+    return pos.x + (pos.y * width);
+}
+
+uint2 IndexToVector(int index, int width){
+    float division = float(index) / float(width);
+    int rounded = int(division);
+    return uint2((division - float(rounded)) * width,rounded);
+}
+
+float2 IndexToFloatVector(int index, int width){
+    float division = float(index) / float(width);
+    int rounded = int(division);
+    return float2((division - float(rounded)) * width,rounded);
+}
+
+
+float2 RelativizeVector(float x, float y, float w, float h){
+     return float2(
+         x / w,
+         y / h
+     );
+}
+
+float3 RelativizeVector(float3 vec, float3 size){
+     return float3(
+         vec.x / size.x,
+         vec.y / size.y,
+         vec.z / size.z
+     );
+ }
+ 
+ void AddToBuffer(int index, int resolution, float2 cellOffset, float value, RWStructuredBuffer<float> buffer){
+    buffer[index] += value * (1 - cellOffset.x) * (1 - cellOffset.y);
+    buffer[index + 1] += value * cellOffset.x * (1 - cellOffset.y);
+    buffer[index + resolution] += value * (1 - cellOffset.x) * cellOffset.y;
+    buffer[index + resolution + 1] += value * cellOffset.x * cellOffset.y;
+}
+ 
+ float3 CalculateNormal(uint2 pos, int resolution, float3 size, RWStructuredBuffer<float> buffer){
+    // Calculate multiplier direction
+    float multiplier = -1;
+    if(pos.x <= 0 || pos.y <= 0){ multiplier = 1; }
+    
+    // Calculate left, right, up and down vertex positions
+    float3 c = float3(pos.x, 0, pos.y);
+    float3 l = float3(pos.x - 1, 0, pos.y);
+    float3 u = float3(pos.x, 0, pos.y - 1);
+ 
+    // Gather heights for left, right, up and down vertices
+    c.y = buffer[PosToIndex(uint2(c.xz), resolution)] * size.y;
+    l.y = buffer[PosToIndex(uint2(l.xz), resolution)] * size.y;
+    u.y = buffer[PosToIndex(uint2(u.xz), resolution)] * size.y;
+    
+    // calculate normal direction
+    return Normalize3D(cross(l - c, u - c)) * multiplier;
+ }
+ 
+ float NormalisedSigmoid(float x, float k){
+    return (x - x * k) / (k - abs(x) * 2 * k + 1);
+ }
+
+float3 CalculateGradientAndHeight (float2 pos, int resolution, RWStructuredBuffer<float> buffer) {
+    // Calculate coords
+    uint2 coord = uint2(
+        (int) pos.x,
+        (int) pos.y
+    );
+
+    // Calculate index
+    int index = PosToIndex(coord, resolution);
+
+    // Calculate droplet's offset inside the cell (0,0) = at NW node, (1,1) = at SE node
+    float x = pos.x - float(coord.x);
+    float y = pos.y - float(coord.y);
+
+    // Calculate heights of the four nodes of the droplet's cell
+    float heightNW = buffer[index];
+    float heightNE = buffer[index + 1];
+    float heightSW = buffer[index + HeightMapResolution];
+    float heightSE = buffer[index + HeightMapResolution + 1];
+    
+    // Calculate droplet's direction of flow with bilinear interpolation of height difference along the edges
+    float gradientX = (heightNE - heightNW) * (1 - y) + (heightSE - heightSW) * y;
+    float gradientY = (heightSW - heightNW) * (1 - x) + (heightSE - heightNE) * x;
+
+    // Calculate height with bilinear interpolation of the heights of the nodes of the cell
+    float height = heightNW * (1 - x) * (1 - y) + heightNE * x * (1 - y) + heightSW * (1 - x) * y + heightSE * x * y;
+    
+    return float3(gradientX,gradientY,height);
+}
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