wip: remove vert color

Editor/PluginDefinition/PluginDefinition.cs

@@ -88,6 +88,7 @@ namespace nadena.dev.modular_avatar.core.editor.plugin
                     var maContext = ctx.Extension<ModularAvatarContext>().BuildContext;
                     FixupExpressionsMenuPass.FixupExpressionsMenu(maContext);
                 });
+                seq.Run(RemoveVertexColorPass.Instance);
 #endif
                 seq.Run(RebindHumanoidAvatarPass.Instance);
                 seq.Run("Purge ModularAvatar components", ctx =>

Editor/RemoveVertexColorPass.cs

@@ -0,0 +1,87 @@
+using System.Collections.Generic;
+using System.Linq;
+using nadena.dev.ndmf;
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.Rendering;
+
+namespace nadena.dev.modular_avatar.core.editor
+{
+    internal class RemoveVertexColorPass : Pass<RemoveVertexColorPass>
+    {
+        protected override void Execute(ndmf.BuildContext context)
+        {
+            var removers = context.AvatarRootTransform.GetComponentsInChildren<ModularAvatarRemoveVertexColor>(true);
+
+            Dictionary<Mesh, Mesh> conversionMap = new();
+            
+            foreach (var remover in removers)
+            {
+                foreach (var smr in remover.GetComponentsInChildren<SkinnedMeshRenderer>(true))
+                {
+                    TryRemove(context, smr, conversionMap);
+                }
+                
+                foreach (var mf in remover.GetComponentsInChildren<MeshFilter>(true))
+                {
+                    TryRemove(context, mf, conversionMap);
+                }
+            }
+        }
+
+        private const string PROP_PATH = "m_Mesh";
+
+        private void TryRemove(ndmf.BuildContext context, Component c, Dictionary<Mesh, Mesh> conversionMap)
+        {
+            SerializedObject obj;
+            SerializedProperty prop;
+
+            if (c is SkinnedMeshRenderer smr)
+            {
+                obj = new SerializedObject(smr);
+                prop = obj.FindProperty(PROP_PATH);
+            } else if (c is MeshFilter mf)
+            {
+                obj = new SerializedObject(mf);
+                prop = obj.FindProperty(PROP_PATH);
+            } else
+            {
+                //Debug.LogWarning($"Could not find a mesh to remove vertex colors from on {remover.name}");
+                // TODO: warning
+                return;
+            }
+            
+            var mesh = prop.objectReferenceValue as Mesh;
+            Mesh originalMesh = mesh;
+            if (mesh == null)
+            {
+                // TODO: warning;
+                return;
+            }
+            
+            if (conversionMap.TryGetValue(mesh, out var converted))
+            {
+                prop.objectReferenceValue = converted;
+                obj.ApplyModifiedPropertiesWithoutUndo();
+                return;
+            }
+
+            if (mesh.GetVertexAttributes().All(va => va.attribute != VertexAttribute.Color))
+            {
+                // no-op
+                return;
+            }
+
+            if (!context.IsTemporaryAsset(mesh))
+            {
+                mesh = UnityEngine.Object.Instantiate(mesh);
+                prop.objectReferenceValue = mesh;
+                obj.ApplyModifiedPropertiesWithoutUndo();
+            }
+
+            mesh.colors = null;
+
+            conversionMap[originalMesh] = mesh;
+        }
+    }
+}

Editor/RemoveVertexColorPass.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: a227da6f9f1548c3867b1ed113f28e9d
+timeCreated: 1733008734

Runtime/RemoveVertexColor.cs

@@ -0,0 +1,12 @@
+using UnityEngine;
+
+namespace nadena.dev.modular_avatar.core
+{
+    [AddComponentMenu("Modular Avatar/MA Remove Vertex Color")]
+    [DisallowMultipleComponent]
+    [HelpURL("https://modular-avatar.nadena.dev/docs/reference/remove-vertex-color?lang=auto")]
+    public class ModularAvatarRemoveVertexColor : AvatarTagComponent
+    {
+        
+    }
+}

Runtime/RemoveVertexColor.cs.meta

@@ -0,0 +1,3 @@
+fileFormatVersion: 2
+guid: dc5f8bfae24244aeaedcd6c2bb7264f9
+timeCreated: 1733008656