From fb26b02a20ef751cdd1832abc925b5e57bb2234b Mon Sep 17 00:00:00 2001
From: yum <yum.food.vr@gmail.com>
Date: Sat, 1 Feb 2025 19:15:58 -0800
Subject: Implement surface stable fractal dithering

---
 Editor/stack_2d_noise_to_3d.cs | 120 +++++++++++++++++++++++++++++++++++++++++
 Editor/tooner.cs               |  28 ++++++++++
 2 files changed, 148 insertions(+)
 create mode 100644 Editor/stack_2d_noise_to_3d.cs

(limited to 'Editor')

diff --git a/Editor/stack_2d_noise_to_3d.cs b/Editor/stack_2d_noise_to_3d.cs
new file mode 100644
index 0000000..adc2773
--- /dev/null
+++ b/Editor/stack_2d_noise_to_3d.cs
@@ -0,0 +1,120 @@
+using UnityEngine;
+using UnityEditor;
+using System.Collections.Generic;
+
+public class ImageSequenceToTexture3D : EditorWindow
+{
+    private List<Texture2D> sourceImages = new List<Texture2D>();
+    private string textureName = "Texture3DFromSequence";
+    private FilterMode filterMode = FilterMode.Bilinear;
+    private TextureWrapMode wrapMode = TextureWrapMode.Repeat;
+
+    [MenuItem("Tools/yum_food/Image Sequence to Texture3D")]
+    public static void ShowWindow()
+    {
+        GetWindow<ImageSequenceToTexture3D>("Image Sequence to Texture3D");
+    }
+
+    private void OnGUI()
+    {
+        GUILayout.Label("Image Sequence to Texture3D Converter", EditorStyles.boldLabel);
+        EditorGUILayout.HelpBox("Add images in the order they should appear in the Z-axis", MessageType.Info);
+
+        // Image sequence management
+        EditorGUILayout.LabelField("Source Images", EditorStyles.boldLabel);
+        for (int i = 0; i < sourceImages.Count; i++)
+        {
+            EditorGUILayout.BeginHorizontal();
+            sourceImages[i] = (Texture2D)EditorGUILayout.ObjectField($"Slice {i}", sourceImages[i], typeof(Texture2D), false);
+            if (GUILayout.Button("Remove", GUILayout.Width(60)))
+            {
+                sourceImages.RemoveAt(i);
+                GUILayout.EndHorizontal();
+                break;
+            }
+            EditorGUILayout.EndHorizontal();
+        }
+
+        if (GUILayout.Button("Add Image Slot"))
+        {
+            sourceImages.Add(null);
+        }
+
+        textureName = EditorGUILayout.TextField("Texture Name", textureName);
+        filterMode = (FilterMode)EditorGUILayout.EnumPopup("Filter Mode", filterMode);
+        wrapMode = (TextureWrapMode)EditorGUILayout.EnumPopup("Wrap Mode", wrapMode);
+
+        if (GUILayout.Button("Generate 3D Texture"))
+        {
+            if (ValidateInputs())
+            {
+                Generate3DTexture();
+            }
+        }
+    }
+
+    private bool ValidateInputs()
+    {
+        if (sourceImages.Count == 0)
+        {
+            EditorUtility.DisplayDialog("Error", "Please add at least one image.", "OK");
+            return false;
+        }
+
+        if (sourceImages.Contains(null))
+        {
+            EditorUtility.DisplayDialog("Error", "Please assign all image slots.", "OK");
+            return false;
+        }
+
+        // Verify all images have the same dimensions
+        int width = sourceImages[0].width;
+        int height = sourceImages[0].height;
+        
+        for (int i = 1; i < sourceImages.Count; i++)
+        {
+            if (sourceImages[i].width != width || sourceImages[i].height != height)
+            {
+                EditorUtility.DisplayDialog("Error", 
+                    $"All images must have the same dimensions. Expected {width}x{height}, but image {i} is {sourceImages[i].width}x{sourceImages[i].height}", 
+                    "OK");
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    private void Generate3DTexture()
+    {
+        int width = sourceImages[0].width;
+        int height = sourceImages[0].height;
+        int depth = sourceImages.Count;
+
+        // Create the 3D texture
+        Texture3D texture3D = new Texture3D(width, height, depth, TextureFormat.RGBA32, false);
+        texture3D.filterMode = filterMode;
+        texture3D.wrapMode = wrapMode;
+
+        // Prepare the color array
+        Color[] colors = new Color[width * height * depth];
+
+        // Copy the pixel data from each source image
+        for (int z = 0; z < depth; z++)
+        {
+            Color[] imageColors = sourceImages[z].GetPixels();
+            System.Array.Copy(imageColors, 0, colors, z * width * height, width * height);
+        }
+
+        texture3D.SetPixels(colors);
+        texture3D.Apply();
+
+        // Save the texture asset
+        string path = $"Assets/{textureName}.asset";
+        AssetDatabase.CreateAsset(texture3D, path);
+        AssetDatabase.SaveAssets();
+        AssetDatabase.Refresh();
+
+        EditorUtility.DisplayDialog("Success", $"3D texture generated and saved at {path}", "OK");
+    }
+}
diff --git a/Editor/tooner.cs b/Editor/tooner.cs
index fab06e0..c7d89d4 100644
--- a/Editor/tooner.cs
+++ b/Editor/tooner.cs
@@ -3236,6 +3236,33 @@ public class ToonerGUI : ShaderGUI {
     EditorGUI.indentLevel -= 1;
   }
 
+  void DoSurfaceStableFractalDithering() {
+    MaterialProperty bc;
+
+    bc = FindProperty("_Surface_Stable_Fractal_Dithering_Enable_Static");
+    bool enabled = (bc.floatValue != 0.0);
+    EditorGUI.BeginChangeCheck();
+    enabled = Toggle("Stable fractal dithering", enabled);
+    EditorGUI.EndChangeCheck();
+    bc.floatValue = enabled ? 1.0f : 0.0f;
+    SetKeyword("_SURFACE_STABLE_FRACTAL_DITHERING", enabled);
+
+    if (!enabled) {
+      return;
+    }
+
+    EditorGUI.indentLevel += 1;
+
+    bc = FindProperty("_Surface_Stable_Fractal_Dithering_Noise");
+    TexturePropertySingleLine(MakeLabel(bc, "Noise"), bc);
+    bc = FindProperty("_Surface_Stable_Fractal_Dithering_Scale");
+    FloatProperty(bc, "Scale");
+    bc = FindProperty("_Surface_Stable_Fractal_Dithering_Max_Fwidth");
+    FloatProperty(bc, "Max fwidth");
+
+    EditorGUI.indentLevel -= 1;
+  }
+
   void DoGimmicks() {
     show_ui.Add(AddCollapsibleMenu("Gimmicks", "_Gimmicks"));
     EditorGUI.indentLevel += 1;
@@ -3269,6 +3296,7 @@ public class ToonerGUI : ShaderGUI {
     DoGeoScroll();
     DoGimmickEpilepsyMode();
     DoLens00();
+    DoSurfaceStableFractalDithering();
 
     EditorGUI.indentLevel -= 1;
     show_ui.RemoveAt(show_ui.Count - 1);
-- 
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