From 03ce78031f28d7bfae4dcdc477a7273c6ecae55b Mon Sep 17 00:00:00 2001
From: Meta Vens <rwvens@hotmail.com>
Date: Wed, 15 Jul 2026 23:38:00 +0100
Subject: [PATCH] Lower portable radial cosine fields

---
 TestProject/Packages/packages-lock.json       |  2 +-
 .../Runtime/Fields/EveFieldsSplatsCore.hlsl   |  9 ++++
 .../EveFieldsUnitySceneProjectionTests.cs     | 48 +++++++++++++++++++
 .../org.gamecult.eve.unity-scene/package.json |  4 +-
 4 files changed, 60 insertions(+), 3 deletions(-)

diff --git a/TestProject/Packages/packages-lock.json b/TestProject/Packages/packages-lock.json
index eb007d8..ea3990d 100644
--- a/TestProject/Packages/packages-lock.json
+++ b/TestProject/Packages/packages-lock.json
@@ -51,7 +51,7 @@
       "source": "local",
       "dependencies": {
         "org.gamecult.cultlib": "1.0.13",
-        "org.gamecult.eve.plugin-fields": "0.2.0",
+        "org.gamecult.eve.plugin-fields": "0.2.3",
         "org.gamecult.eve.surface": "0.2.2",
         "com.unity.mathematics": "1.3.2",
         "com.unity.modules.particlesystem": "1.0.0"
diff --git a/packages/org.gamecult.eve.unity-scene/Runtime/Fields/EveFieldsSplatsCore.hlsl b/packages/org.gamecult.eve.unity-scene/Runtime/Fields/EveFieldsSplatsCore.hlsl
index d40dce3..316316d 100644
--- a/packages/org.gamecult.eve.unity-scene/Runtime/Fields/EveFieldsSplatsCore.hlsl
+++ b/packages/org.gamecult.eve.unity-scene/Runtime/Fields/EveFieldsSplatsCore.hlsl
@@ -176,6 +176,15 @@ float4 Frag(Varyings input) : SV_Target
             input.fieldWorld * splat.sourceFrequencyPhase.xy + splat.sourceFrequencyPhase.zw,
             _EveFieldsSimulationTimeSeconds * splat.layerSource.z);
     }
+    else if (sourceKind == 4)
+    {
+        float distance01 = length(input.localUv);
+        float radialExponent = max(0.0001, splat.sourceFrequencyPhase.y);
+        source = cos(
+            pow(distance01, radialExponent) * splat.sourceFrequencyPhase.x +
+            splat.sourceFrequencyPhase.z +
+            _EveFieldsSimulationTimeSeconds * splat.layerSource.z);
+    }
     if (((int)round(splat.layerSource.w) & 1) != 0) source = abs(source);
     return splat.value * (alpha * source * _ValueScale);
 }
diff --git a/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveFieldsUnitySceneProjectionTests.cs b/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveFieldsUnitySceneProjectionTests.cs
index 32d9451..7be1fc4 100644
--- a/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveFieldsUnitySceneProjectionTests.cs
+++ b/packages/org.gamecult.eve.unity-scene/Tests/Editor/EveFieldsUnitySceneProjectionTests.cs
@@ -209,6 +209,54 @@ namespace GameCult.Eve.UnityScene.Tests
             Assert.That(Mathf.Abs(laterValue - firstValue), Is.GreaterThan(0.005f));
         }
 
+        [Test]
+        public void RasterizerLowersPortableAnimatedRadialCosine()
+        {
+            var initial = RadialCosineDocument(0);
+            var halfTurnLater = RadialCosineDocument(Math.PI);
+
+            var center = RenderFieldPixel(initial, 64, 64);
+            var radial = RenderFieldPixel(initial, 80, 64);
+            var laterCenter = RenderFieldPixel(halfTurnLater, 64, 64);
+            var localX = (80.5f / 128f) * 2f - 1f;
+            var localY = (64.5f / 128f) * 2f - 1f;
+            var expected = Mathf.Cos(Mathf.Pow(Mathf.Sqrt(localX * localX + localY * localY), 1.25f) * Mathf.PI * 2f);
+
+            Assert.That(center, Is.GreaterThan(0.98f));
+            Assert.That(radial, Is.EqualTo(expected).Within(0.04f));
+            Assert.That(laterCenter, Is.LessThan(-0.98f),
+                "radial phase animation must use provider-published simulation time");
+        }
+
+        private static EveFieldsSplatsDocument RadialCosineDocument(double simulationTime)
+        {
+            return new EveFieldsSplatsDocument
+            {
+                SimulationTimeSeconds = simulationTime,
+                Viewport = new EveFieldsViewport { MinX = -1, MinY = -1, MaxX = 1, MaxY = 1 },
+                Splats = new EveFieldsSplatSoa
+                {
+                    Count = 1,
+                    CenterX = new[] { 0d },
+                    CenterY = new[] { 0d },
+                    HalfExtentX = new[] { 1d },
+                    HalfExtentY = new[] { 1d },
+                    RotationCos = new[] { 1d },
+                    RotationSin = new[] { 0d },
+                    Channel = new[] { 0 },
+                    Falloff = new[] { EveFieldsSplatFalloffs.Solid },
+                    ValueR = new[] { 1d },
+                    ValueA = new[] { 1d },
+                    LayerIndex = new[] { 0 },
+                    SourceKind = new[] { EveFieldsSplatSourceKinds.AnimatedRadialCosine },
+                    FrequencyX = new[] { Math.PI * 2d },
+                    FrequencyY = new[] { 1.25d },
+                    PhaseX = new[] { 0d },
+                    AnimationSpeed = new[] { 1d }
+                }
+            };
+        }
+
         private static EveFieldsSplatsDocument ProceduralDocument(
             double min,
             double max,
diff --git a/packages/org.gamecult.eve.unity-scene/package.json b/packages/org.gamecult.eve.unity-scene/package.json
index 0c48786..4b65aa3 100644
--- a/packages/org.gamecult.eve.unity-scene/package.json
+++ b/packages/org.gamecult.eve.unity-scene/package.json
@@ -1,12 +1,12 @@
 {
     "name": "org.gamecult.eve.unity-scene",
     "displayName": "Eve Unity Scene Lowering",
-    "version": "0.3.43",
+    "version": "0.3.44",
     "unity": "2021.3",
     "description": "Provider-agnostic Unity scene shell for gamecult.eve.surface.v1 interactive world surfaces.",
     "dependencies": {
         "org.gamecult.cultlib": "1.0.13",
-        "org.gamecult.eve.plugin-fields": "0.2.2",
+        "org.gamecult.eve.plugin-fields": "0.2.3",
         "org.gamecult.eve.surface": "0.2.2",
         "com.unity.mathematics": "1.3.2",
         "com.unity.modules.particlesystem": "1.0.0"