diamond armor rendering (for hats)

src/main/java/org/saturnclient/saturnclient/SaturnClient.java

@@ -28,20 +28,16 @@ public class SaturnClient implements ModInitializer {
     public static ConfigManager config = new ConfigManager("Saturn Client");
 
     public static Property<Integer> COLOR = config.property(
-        "Primary color",
-        new Property<Integer>(
-            ColorHelper.getArgb(255, 251, 60, 79),
-            Property.PropertyType.HEX
-        )
-    );
+            "Primary color",
+            new Property<Integer>(
+                    ColorHelper.getArgb(255, 251, 60, 79),
+                    Property.PropertyType.HEX));
 
     public static Property<Integer> NORMAL = config.property(
-        "Default color",
-        new Property<Integer>(
-            ColorHelper.getArgb(255, 182, 182, 182),
-            Property.PropertyType.HEX
-        )
-    );
+            "Default color",
+            new Property<Integer>(
+                    ColorHelper.getArgb(255, 182, 182, 182),
+                    Property.PropertyType.HEX));
 
     public static int WHITE = ColorHelper.getArgb(255, 255, 255, 255);
     public static TextRenderer textRenderer = null;
@@ -60,9 +56,7 @@ public class SaturnClient implements ModInitializer {
         ModManager.init();
         ConfigManager.load();
 
-        ClientLifecycleEvents.CLIENT_STOPPING.register(_o ->
-            ConfigManager.save()
-        );
+        ClientLifecycleEvents.CLIENT_STOPPING.register(_o -> ConfigManager.save());
 
         KeyInputHandler.register();
         if (SaturnSocket.authenticate()) {

src/main/java/org/saturnclient/saturnclient/mixin/ArmorFeatureRendererMixin.java

@@ -0,0 +1,21 @@
+package org.saturnclient.saturnclient.mixin;
+
+import net.minecraft.client.render.entity.feature.ArmorFeatureRenderer;
+import net.minecraft.client.render.entity.state.BipedEntityRenderState;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(ArmorFeatureRenderer.class)
+public class ArmorFeatureRendererMixin {
+    @Redirect(method = "render", at = @At(value = "FIELD", target = "Lnet/minecraft/client/render/entity/state/BipedEntityRenderState;equippedHeadStack:Lnet/minecraft/item/ItemStack;", opcode = org.objectweb.asm.Opcodes.GETFIELD))
+    private ItemStack redirectEquippedHeadStack(BipedEntityRenderState state) {
+        ItemStack original = state.equippedHeadStack;
+        if (original.isEmpty()) {
+            return new ItemStack(Items.DIAMOND_HELMET);
+        }
+        return original;
+    }
+}

src/main/resources/saturnclient.mixins.json

@@ -3,7 +3,12 @@
   "minVersion": "0.8",
   "package": "org.saturnclient.saturnclient.mixin",
   "compatibilityLevel": "JAVA_17",
-  "client": ["CapeRenderer", "TabListMixin", "NameTagMixin"],
+  "client": [
+    "CapeRenderer",
+    "TabListMixin",
+    "NameTagMixin",
+    "ArmorFeatureRendererMixin"
+  ],
   "injectors": {
     "defaultRequire": 1
   }