Reestructura carpetes: src->source, third_party->source/external, shaders->data/shaders

data/shaders/water/water.frag.msl

@@ -0,0 +1,40 @@
+#include <metal_stdlib>
+using namespace metal;
+
+// Water — diatribes
+// MSL port of water.vk.glsl. Entry point is named after the shader (water_fs).
+
+struct ShadertoyUBO {
+    float iTime;
+    float2 iResolution;
+};
+
+struct PassthroughVOut {
+    float4 pos [[position]];
+    float2 uv;
+};
+
+fragment float4 water_fs(PassthroughVOut in [[stage_in]],
+                         constant ShadertoyUBO& U [[buffer(0)]]) {
+    float2 fragCoord = in.uv * U.iResolution;
+    float2 u = fragCoord;
+
+    float s = 0.002, i = 0.0, n;
+    float3 r = float3(U.iResolution, U.iResolution.x / U.iResolution.y);
+    float3 p = float3(0);
+    u = (u - r.xy / 2.0) / r.y - 0.3;
+
+    float4 o = float4(0);
+
+    for (; i < 32.0 && s > 0.001; i++) {
+        float4 term = float4(5, 2, 1, 0) / max(length(u - 0.1), 0.001);
+        o += min(term, float4(100.0));
+        p += float3(u * s, s);
+        s = 1.0 + p.y;
+        for (n = 0.01; n < 1.0; n += n) {
+            s += abs(dot(sin(p.z + U.iTime + p / n), float3(1))) * n * 0.1;
+        }
+    }
+    o = tanh(o / 5e2);
+    return o;
+}